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‘GREENER’ CHEMICAL SYNTHESES USING MICROWAVE IRRADIATION (PRAGUE) |
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'Greener' solvent-free protocols involve microwave (MW) exposure of neat reactants catalyzed by the surfaces of recyclable mineral supports such as alumina, silica and clay which a...
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"GREENER" CHEMICAL SYNTHESES USING AN ALTERNATE REACTION CONDITIONS OR AQUEOUS MEDIA |
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A solvent-free approach that involves microwave (MW) exposure of neat reactants (undiluted) catalyzed by the surfaces of recyclable mineral supports such as alumina, silica, clay, ...
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"GREENER" CHEMICAL SYNTHETIC PROCESSES USING ENZYMATIC, MECHANOCHEMICAL MIXING, OR MICROWAVE AND ULTRASOUND IRRADIATION |
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Several newer strategies, such as solvent-free (dry media), solid-supported with and without microwave (MW) irradiation, and mechanochemical mixing (grinding); and the use of room ...
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'GREENER' CHEMICAL SYNTHESES USING ALTERNATE REACTION CONDITIONS |
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Microwave (MW) irradiation in conjunction with water as reaction media has proven to be a greener chemical approach for expeditious N-alkylation reactions of amines and hydrazines ...
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'GREENER' CHEMICAL SYNTHESES USING MICROWAVES UNDER SOLVENT-FREE CONDITIONS OR AQUEOUS MEDIA |
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A solvent-free approach that involves microwave (MW) exposure of neat reactants (undiluted) catalyzed by the surfaces of recyclable mineral supports such as alumina, silica, clay, ...
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'GREENER' CHEMICAL SYNTHESIS USING MICROWAVE IRRADIATION |
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A solvent-free approach that involves microwave (MW) exposure of neat reactants (undiluted) catalyzed by the surfaces of recyclable mineral supports such as alumina, silica, clay, ...
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'GREENER' ORGANIC SYNTHESES AND TRANSFORMATIONS USING MICROWAVES UNDER SOLVENT-FREE CONDITIONS OR AQUEOUS MEDIA |
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A solvent-free approach that involves microwave (MW) exposure of neat reactants (undiluted) catalyzed by the surfaces of recyclable mineral supports such as alumina, silica, clay, ...
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'GREENER' SOLVENT-FREE CHEMICAL SYNTHESIS USING MICROWAVE IRRADIATION |
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Solvent-free approach that involves microwave (MW) irradiation of neat reactants (undiluted) catalyzed by the surfaces of less-expensive and recyclable mineral supports such as alu...
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2,4-DINITROPHENYLHYDRAZINE COATED SILICA GEL CARTRIDGE METHOD FOR DETERMINATION OF FORMALDEHYDE IN AIR: IDENTIFICATION OF AN OZONE INTERFERENCE |
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Two versions of the 2,4-dinitrophenylhydrazine method, a coated silica gel cartridge (solid) and acetonitrile impinger (solvent based), were used simultaneously to sample varied co...
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A CASE STUDY OF THE REFERENCE CONDITION APPROACH TO NITROGEN MANAGEMENT IN ESTUARIES |
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One way to estimate estuarine response to changes in nitrogen loading in coastal systems is by using a reference approach. This talk details the application of paleoecological anal...
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A LC/MS METHOD FOR THE DETERMINATION OF CYANOBACTERIA TOXINS IN WATER |
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The cyanobacteria toxins anatoxin-a, microcystin-LR, microcystin-RR, microcystin-YR, and nodularin were separated in less than 30 minutes on several 1 mm x 15 cm reverse phase liqu...
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A METHOD FOR AUTOMATED ANALYSIS OF 10 ML WATER SAMPLES CONTAINING ACIDIC, BASIC, AND NEUTRAL SEMIVOLATILE COMPOUNDS LISTED IN USEPA METHOD 8270 BY SOLID PHASE EXTRACTION COUPLED IN-LINE TO LARGE VOLUME INJECTION GAS CHROMATOGRAPHY/MASS SPECTROMETRY |
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Data is presented showing the progress made towards the development of a new automated system combining solid phase extraction (SPE) with gas chromatography/mass spectrometry for t...
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A TOXICITY ASSESSMENT APPROACH TO EVALUATING IN-SITU BIOREMEDIATION OF PAH CONTAMINATED SEDIMENTS |
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Freshwater and marine sediment toxicity tests were used to measure baseline toxicity of sediment samples collected from New Jersey/New York Harbor (NJ/NY) (non-PAH- contaminated) s...
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A WHOLE-LAKE WATER QUALITY SURVEY OF LAKE OAHE BASED ON A SPATIALLY-BALANCED PROBABILISTIC DESIGN |
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Assessing conditions on large bodies of water presets multiple statistical and logistical challenges. As part of the Upper Missouri River Program of the Environmental Monitoring an...
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ADSORPTION OF ORGANIC CATIONS TO SOILS AND SUBSURFACE MATERIALS |
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A study of the fundamentals of adsorption of amphiphilic organic cations on natural and pristine surfaces was conducted to elucidate (i) the factors that influence the extent of ad...
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ADVACATE -- LOW-COST PROCESS FOR SO2 CONTROL |
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The paper discusses sorbent chemistry and process chemistry of the ADVAnced siliCATE (ADVACATE) process, a simple, low-cost add-on technology for S02 control, easily retrofitted on...
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AFM MEASUREMENTS OF HYDROPHOBIC FORCES BETWEEN A POLYETHYLENE SPHERE AND SILANATED SILICA PLATES-THE SIGNIFICANCE OF SURFACE ROUGHNESS. (R825396) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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AN EFFICIENT AND CHEMOSELECTIVE CBZ-PROTECTION OF AMINES USING SILICA-SULFURIC ACID AT ROOM TEMPERATURE |
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A simple, facile, and chemoselective N-benzyloxycarbonylation of amines using silica-sulfuric acid that proceeds under solvent-free conditions at room temperature has been achieved...
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AN EXPERIMENTAL ASSESSMENT OF THE IMPACTS OF PARTIAL DNAPL SOURCE ZONE DELETION USING SPARGING AS A REMEDIATION TECHNIQUE |
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The contamination of the subsurface environment by dense non-aqueous phase liquids (DNAPL) is a wide-spread problem that poses a significant threat to soil and groundwater quality....
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ANALYSIS OF ANIONIC METALLIZED AZO AND FORMAZAN DYES BY CAPILLARY ELECTROPHORESIS/MASS SPECTROMETRY |
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Capillary electrophoresis-mass spectrometry was applied to the separation of several anionic dyes containing copper(II), chromium(III), or cobalt(III) as part of the dye molecule. ...
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ANALYSIS OF HAZARDOUS WASTE AND ENVIRONMENTAL EXTRACTS BY CAPILLARY GAS CHROMATOGRAPHY/FOURIER TRANSFORM INFRARED SPECTROMETRY AND CAPILLARY GAS CHROMATOGRAPHY/MASS SPECTROMETRY |
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The relative sensitivities of fused-silica capillary column gas chromatography/Fourier transform infrared spectrometry (FSCC/GC/FT-IR) versus packed-column GC/FT-IR and FSCC/GC/FT-...
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ANALYSIS OF LANDSCAPE AND WATER QUALITY IN THE NEW YORK CATSKILL - DELAWARE WATERSHED (1973-1998) |
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The primary goal of this study is to improve risk assessment through the development of methods and tools for characterization of landscape and water resource change. Exploring the...
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ANALYSIS OF SOIL AND HOUSE DUST FOR POLYCYCLIC AROMATIC HYDROCARBONS |
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It has been conjectured that jet turbine exhaust near airplane flight paths may result in significant human exposure to PAH. The fallout from the aerosol plume could be introduced...
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ANALYSIS OF THE NBS (NATIONAL BUREAU OF STANDARDS) SEDIMENT BY THE MRI (MIDWEST RESEARCH INSTITUTE) SLUDGE PROTOCOL |
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An extraction technique, involving homogenization of a sediment sample with dichloromethane at dual pH and phase separation by centrifugation, was used in the determination of fift...
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ANALYTICAL METHODS FOR A NATIONAL STUDY OF CHEMICAL RESIDUES IN FISH - I: POLYCHLORINATED DIBENZO-P-DIOXINS/DIBENZOFURANS |
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Analytical Methods were developed to determine the concentration of PCDD/PCDF in fish tissue for a national survey conducted by EPA. he method was designed to achieve a relatively ...
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ANALYTICAL METHODS FOR A NATIONAL STUDY OF CHEMICAL RESIDUES IN FISH - II. PESTICIDES AND POLYCHLORINATED BIPHENYLS |
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Analytical methods and a quality assurance plan have been developed to determine the concentration of a select group of bioaccumulatable chemicals in fish tissue. he analytes inclu...
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APITRON ELECTROSTATICALLY AUGMENTED FABRIC FILTER EVALUATION |
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The report gives results of fractional and overall mass efficiency tests of two Apitron electrostatically augmented fabric filter dust collectors. The tests were performed on a mob...
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APPLICATION OF CAPILLARY SUPERCRITICAL FLUID CHROMATOGRAPHY TO THE ANALYSIS OF A MIDDLE DISTILLATE FUEL |
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The paper describes the application of capillary supercritical fluid chromatography (SFC) to the analysis of a middle distillate fuel. Small diameter (50 micrometer i.d.) fused sil...
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APPLICATION OF OPEN-TUBULAR COLUMNS TO SW-846 GC METHODS |
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A gas chromatographic method was developed and evaluated in a single laboratory for the determination of several groups of pollutants. he method specifies the use of an injection t...
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AQUEOUS AND VAPOR PHASE MERCURY SORPTION BY INORGANIC OXIDE MATERIALS FUNCTIONALIZED WITH THIOLS AND POLY-THIOLS |
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The objective of the study is the development of sorbents where the sorption sites are highly accessible for the capture of mercury from aqueous and vapor streams. Only a small fra...
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ASSESSMENT OF FUNGAL GROWTH ON CEILING TILES UNDER ENVIRONMENTALLY CHARACTERIZED CONDITIONS |
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The paper discusses investigation of the impact of the building environment on the ability of building materials to support microbial growth, using static chambers with defined rel...
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ASSESSMENT OF INHALATION EXPOSURES AND POTENTIAL HEALTH RISKS TO THE GENERAL POPULATION THAT RESULTED FROM THE COLLAPSE OF THE WORLD TRADE CENTER TOWERS |
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In the days following the collapse of the World Trade Center (WTC) towers on September 11, 2001 (9/11), the U.S. Environmental Protection Agency (EPA) initiated numerous air monito...
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Arsenic Removal from Drinking Water by Adsorptive Media U.S. EPA Demonstration Project at Wellman, TX, Six-Month Evaluation Report |
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This report documents the activities performed and the results obtained from the first six months of the arsenic removal treatment technology demonstration project in the City of W...
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BACTERIOPHAGE PRD1 AND SILICA COLLOID TRANSPORT AND RECOVERY IN AN IRON OXIDE-COATED SAND AQUIFER. (R826179) |
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Bacteriophage PRD1 and silica colloids were co-injected into
sewage-contaminated and uncontaminated zones of an iron oxide-coated sand
aquifer on Cape Cod, MA, and their...
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BENCH-SCALE TESTING OF SORBENT ADDITIVES FOR TRACE METAL CAPTURE AND RETENTION |
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The suitability of six minerals; silica, diatomaceous earth, kaolin, bauxite, alumina and attapulgite clay, as potential sorbents for the capture and immobilization of trace metals...
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BENTHIC NUTRIENT FLUX IN A GULF OF MEXICO ESTUARY DURING REDUCED-FLOW CONDITIONS |
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Benthic Nutrient Flux in a Small Estuary in Northwestern Florida(USA).Gulf and Caribbean Research 18, 15-25, 2006.
Benthic nutrient fluxes of ammonium (NH4+), nitrite/nitrat...
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BINARY DESORPTION ISOTHERMS OF TCE AND PCE FROM SILICA GEL AND NATURAL SOLIDS. (R822626) |
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Binary solute desorption isotherms of trichloroethylene (TCE) and tetrachloroethylene (PCE) at 100% relative humidity from silica gel and two well-characterized natural solids w...
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BIOASSAY-DIRECTED FRACTIONATION OF ORGANIC CONTAMINANTS IN AN ESTUARINE SEDIMENT USING THE NEW MUTAGENIC BIOASSAY, MUTATOX |
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Bioassay-directed fractionation of organic compounds was performed on an organic solvent extract of a contaminated estuarine sediment from Black Rock Harbor, Connecticut, using the...
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BIOASSAY-DIRECTED FRACTIONATION OF THE ORGANIC EXTRACT OF SRM 1649 URBAN AIR PARTICULATE MATTER |
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Separation of 2 grams of the methylene chloride extract of NIST SRM 1649 (Washington, D.C. urban air particulate matter) into six compound class fractions by acid-base partitioning...
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BIOAVAILABILITY OF PBDES IN MALE RATS FROM ORALLY ADMINISTERED HOUSEHOLD DUST |
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Recently, household dust has been implicated as a major source of polybrominated diphenyl ether (PBDE) exposure in humans. This finding has very important implications especiall...
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BIOLOGICAL, CHEMICAL AND PHYSICAL RELATIONSHIPS IN THE STRAITS OF MACKINAC |
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Three cruises were conducted from August to October 1973 in the vicinity of the Straits of Mackinac. Environmental conditions were influenced by the net transport of water from Lak...
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BLOOD AND BRAIN CONCENTRATIONS OF BIFENTHRIN CORRELATE WITH DECREASED MOTOR ACTIVITY INDEPENDENT OF TIME OF EXPOSURE |
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Pyrethroids are neurotoxic insecticides used in a variety of agricultural and household activities. Due to the phase-out of organophosphate pesticides, the use of pyrethroids has ...
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C, H, AND O COMPOUNDS - CYCLOPRATE, KINOPRENE, METHOPRENE, AND RESMETHRIN |
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A method was developed for the determination of four compounds containing only carbon, hydrogen, and oxygen (cycloprate, kinoprene, methoprene, and resmethrin), in wastewaters. The...
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C-18-COATED SILICA PARTICLES AS A SURROGATE FOR BENTHIC UPTAKE OF HYDROPHOBIC COMPOUNDS FROM BEDDED SEDIMENT |
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NO ABSTRACT PROVIDED...
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CAPILLARY ELECTROPHORESIS COUPLED ON-LINE WITH INDUCTIVELY COUPLED PLASMA MASS SPECTROMETRY FOR ELEMENTAL SPECIATION |
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A novel interface to connect a capillary electrophoresis (CE) system with an inductively coupled plasma mass spectrometric (ICPMS) detector is reported here. The interface was buil...
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CAPILLARY ELECTROPHORESIS FOR THE CHARACTERIZATION OF HUMIC SUBSTANCES |
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The potential of high performance capillary electrophoresis (HPCE), especially in the free solution mode (FSCE), is demonstrated for the analysis/characterization of environmental ...
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CARBOXYLIC ACID EFFECTS ON ETHANOL RECOVERY FROM AQUEOUS MIXTURES USING PERVAPORATION THROUGH MFI ZEOLITE-FILLED POLYDIMETHYLSILOXANE MEMBRANES |
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Most bioethanol is produced by fermenting sugars released from biomass and using distillation to recover the ethanol. Recovering ethanol from the fermentation broths using pervapo...
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CHARACTERIZATION OF ADVANCED SORBENTS FOR DRY SO2 CONTROL |
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The paper discusses the development of new flyash/lime sorbents or removing SO2 from coal-fired flue gas. Flyash/time weight ratios of 1:1 to 10:1 and several additives to these so...
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CHARACTERIZATION OF METALS IN RUNOFF FROM RESIDENTIAL AND HIGHWAY STORM SEWERS |
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Stormwater runoff was sampled from six storm sewer outfalls in residential and highway settings in Monmouth County, NJ to determine the colloidal and dissolved metal concentrations...
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CHEMICAL SYNTHESES AND TRANSFORMATIONS UNDER NON-TRADITIONAL CONDITIONS |
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A solvent-free approach that involves microwave (MW) exposure of neat reactants (undiluted) catalyzed by the surfaces of recyclable mineral supports such as alumina, silica, clay, ...
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CHEMICAL SYNTHESIS & TRANSFORMATIONS USING MICROWAVES |
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A historical account of the utility of microwaves in a variety of chemical synthesis applications will be presented, including a solvent-free strategy that involves microwave (MW) ...
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CHEMICAL TRANSFORMATIONS USING NON-TRADITIONAL APPROACHES: MICROWAVE-ASSISTED GREENER SYNTHESES IN AQUEOUS MEDIA OR UNDER SOLVENT-FREE CONDITIONS |
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Microwave (MW) irradiation in conjunction with water as reaction media has proven to be a 'greener' chemical approach for expeditious N-alkylation reactions of amines and hy...
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CHEMISTRY UNDER 'GREENER' CONDITIONS: SOLVENT-FREE SYNTHESIS USING MICROWAVE IRRADIATION |
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Solvent-free approach is emphasized that involves microwave (MW) irradiation of neat reactants (undiluted) catalyzed by the surfaces of less-expensive and recyclable mineral suppor...
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CHEMISTRY UNDER NON-TRADITIONAL CONDITIONS: SOLVENT-FREE SYNTHESIS USING MICROWAVE IRRADIATION |
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A solvent-free approach that involves microwave (MW) irradiation of neat reactants (undiluted) catalyzed by the surfaces of less-expensive and recyclable mineral supports such as a...
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CHESAPEAKE BAY NUTRIENT DYNAMICS STUDY |
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This study had two major objectives. The first was to fill gaps in our understanding of important biological, chemical, and physical processes occurring in the Bay. This informatio...
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CHROMATOGRAPHIC AND MASS SPECTRAL STUDIES OF PERFLUOROOCTANESULFONATE AND THREE PERFLUOROOCTANESULFONAMIDES |
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The chromatographic and mass spectral characteristics of perfluorooctanesulfonate (PFOS) and three nitrogen-substituted perfluorooctanesulfonamides have been obtained. A methyl/ph...
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CHROMATOGRAPHIC PERSPECTIVE OF HIGH-PERFORMANCE LIQUID CHROMATOGRAPHY-MASS SPECTROMETRY |
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The coupling of high-performance liquid chromatography with mass spectrometry (HPLC-MS) is today a rapidly advancing field. In the paper, the chromatographic aspects of this coupli...
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CLOSED-LOOP STRIPPING ANALYSIS (CLSA) OF SYNTHETIC MUSK COMPOUNDS FROM FISH TISSUES WITH MEASUREMENT BY OC/MS/SIM |
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Synthetic musk compounds are used as inexpensive fragrance materials for the production
of perfumes and as additives to soap, detergent, and shampoo. They have been found in su...
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COLD TRAPPING OF VOLATILE ORGANIC COMPOUNDS ON FUSED SILICA CAPILLARY COLUMNS |
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A 30m, 0.25mm ID, fused silica capillary column at temperatures from -60 to -100C has been shown to be a quantitative trap for organic compounds with volatilities ranging from that...
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COMPARATIVE EVALUATION OF GC/MS (GAS CHROMATOGRAPHY/MASS SPECTROMETRY) DATA ANALYSIS PROCESSING |
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Mass spectra obtained by fused silica capillary gas chromatography/mass spectrometry/data system (GC/MS/DS) analysis of mixtures of organic chemicals adsorbed on Tenax GC cartridge...
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COMPARISON OF CHOLINESTERASE ACTIVITY, RESIDUE LEVELS, AND URINARY METABOLITE EXCRETION OF RATS EXPOSED TO ORGANOPHOSPHORUS PESTICIDES |
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Blood cholinesterase activity, urinary levels of phenolic and organophosphorus metabolites, and residues of intact compounds in blood and fat were determined following exposure of ...
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COMPARISON OF OVERALL METABOLISM OF 1, 2, 7, 8-PECDD IN CYP1A2(-L-) KNOCKOUT AND C57BL/6N PARENTAL STRAINS OF MICE |
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COMPARISON OF OVERALL METABOLISM OF 1,2,3,7,8-PeCDD
IN CYP1A2 (-/-) KNOCKOUT AND C57BL/6N PARENTAL
STRAINS OF MICE
Heldur Hakk1 and Janet J. Diliberto2
1 USDA...
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COMPARISON OF OVERALL METABOLISM OF 2, 3, 7, 8-TETRACHLORODIBENZO-P-DIOXIN IN CYP1A2(-/-) KNOCKOUT AND C57BL/6N PARENTAL STRAINS OF MICE |
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Comparison of Overall Metabolism of 2,3,7,8-TCDD
in CYP1A2 (-/-) Knockout and C57BL/6N Parental Strains of Mice
Heldur Hakk* and Janet J. Diliberto**
* USDA-ARS ...
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COMPARISON OF SILICA IMMOBILIZED POLY-L-CYSTEINE AND 8-HYDROXYQUINOLINE FOR TRACE METAL CHELATION AND PRECONCENTRATION. (R826694C651) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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COMPARISON OF THREE WET-ALKALINE METHODS OF DIGESTION OF BIOGENIC SILICA IN WATER |
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Methods for determination of low levels of biogenic silica (0.2-0.4 mg SiO2) in aqueous samples after digestion with three wet-alkaline extraction procedures compared favourably in...
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CONTROLLING ODOROUS EMISSIONS FROM IRON FOUNDRIES |
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The report discusses the control of odorous emissions from iron foundries. he main process sources of odors in iron foundries are mold and core making, casting, and sand shakeout. ...
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CONTROLLING ODOROUS EMISSIONS FROM IRON FOUNDRIES |
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The report discusses the control of odorous emissions from iron foundries. he main process sources of odors in iron foundries are mold and core making, casting, and sand shakeout. ...
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COPPER PITTING AND PINHOLE LEAK RESEARCH STUDY |
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Localized copper corrosion or pitting is a significant problem at many water utilities across the United States. Copper pinhole leak problems resulting from extensive pitting are ...
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COUNTER-DIFFUSION OF ISOTOPICALLY LABELED TRICHLOROETHYLENE IN SILICA GEL AND GEOSORBENT MICROPORES: COLUMN RESULTS. (R822626) |
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To investigate counter-diffusion in microporous sorbents, the rate of
exchange between deuterated trichloroethylene (DTCE) in fast desorbing sites and
nondeuterated TCE ...
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DEHYDRATION OF ALCOHOLS VIA PERVAPORATION USING A NOVEL HYDROHILIC MEMBRANE |
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Pervaporation has emerged as an economically viable alternative technology for the dehydration of organic solvents, removal of organic compounds from water and organic/organic sepa...
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DEHYDRATION OF ALCOHOLS VIA PREVAPORATION USING A NOVEL HYDROPHILIC MEMBRANE |
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Pervaporation has emerged as an economically viable alternative technology for the dehydration of organic solvents, removal of organic compounds from water and organic/organic sepa...
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DEHYDROGENATION CATALYST FOR PRODUCTION OF MTBE |
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The objectives of this project were to better understand the effect of different catalyst preparation parameters, the effect of different catalyst treatment parameters, and the mec...
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DEMONSTRATION OF A MAXIMUM RECYCLE, SIDESTREAM SOFTENING SYSTEM AT A PETROCHEMICAL PLANT AND A PETROLEUM REFINERY |
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New full-scale maximum recycle sidestream softening systems at USS Chemicals, Houston, Texas and TOSCO refinery, Bakersfield, California were evaluated as a technology to achieve z...
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DEPLETION OF IRON AND ASCORBATE IN RODENTS DIMINISHES LUNG INJURY AFTER SILICA |
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Exposures of the lung to iron chelates can be associated with an injury. The catalysis of oxygen-based free radicals is postulated to participate in this injury. Such oxidant gener...
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DETERMINATION OF 51 PRIORITY ORGANIC COMPOUNDS AFTER EXTRACTION FROM STANDARD REFERENCE MATERIALS |
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An extraction technique, involving homogenization of a sediment sample with dichloromethane at dual pH and phase separation by centrifugation, was used in the determination of 51 o...
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DETERMINATION OF C2 TO C12 AMBIENT AIR HYDROCARBONS IN 39 U.S. CITIES FROM 1984 THROUGH 1986 |
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Currently more than 60 urban areas are not in compliance with the National Ambient Air Quality Standard (NAAQS) for ozone. The use of photochemical models will be necessart to fore...
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DETERMINATION OF CHLORDANE IN SOIL BY LC/GC/ECD AND LC/GC/EC NIMS WITH COMPARISON OF ASE, SFE, AND SOXHLET EXTRACTION |
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Chlordane is a polychlorinated mixture that was used as a long-lived pesticide and now is considered a potential endocrine-disrupting compound. The Environmental Sciences Division ...
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DETERMINATION OF DIPHENYLAMINE IN INDUSTRIAL AND MUNICIPAL WASTEWATERS |
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A method was developed for the determination of diphenylamine in wastewaters. The method development program consisted of a literature review: determination of extraction efficienc...
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DETERMINATION OF FENTHION RESIDUES IN SAMPLES OF MARINE BIOTA AND SEAWATER FROM LABORATORY EXPOSURES AND FIELD APPLICATIONS |
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A method for measuring fenthion in samples from the estuarine environment is described. The method was applied to samples from field applications of fenthion to control saltmarsh m...
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DETERMINATION OF MERCAPTOBENZOTHIAZOLE IN INDUSTRIAL AND MUNICIPAL WASTEWATERS |
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A method was developed for the determination of mercaptobenzothiazole in wastewaters. The method development program consisted of a literature review; determination of extraction e...
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DETERMINATION OF METALS IN SOLID SAMPLES BY COMPLEXATION-SFE AND GC-ATOMIC EMISSION DETECTION |
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Complexation followed by SFE has been investigated for the extraction of Cu2+, Co2+, Cd2+, and Zn2+ ions from solid samples. ithium bis(trifluoroethyl)dithiocarbamate (FDDC) was us...
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DETERMINATION OF PESTICIDE RESIDUES IN BIOLOGICAL EXTRACTS BY RETENTION TIME LOCKING CAPILLARY GAS CHROMATOGRAPHY MASS SPECTROMETRY |
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The widespread use of pesticides in agricultural and urban areas (golf course and residential lawn applications) is largely responsible for the presence of these compounds in many ...
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DETERMINATION OF ROTENONE IN INDUSTRIAL AND MUNICIPAL WASTEWATERS |
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A method was developed for the determination of rotenone in wastewaters. The method development program consisted of a literature review; determination of extraction efficiency for...
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DETERMINATION OF THIOCARBAMATES IN INDUSTRIAL AND MUNICIPAL WASTEWATER - BUTYLATE, CYCLOATE, EPTC, MOLINATE, PEBULATE, AND VERNOLATE |
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A method was developed for the determination of six thiocarbamate compounds (butylate, cycloate, EPTC, molinate, pebulate, and vernolate) in wastewaters. The method development pro...
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DETERMINATION OF ULTRATRACE CONCENTRATIONS OF AGRICULTURAL PESTICIDES IN WATER USING SOLID-PHASE EXTRACTION AND ANALYSIS BY GC/MS |
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A comprehensive study of the distribution of airborne agricultural contaminants in the Southern Sierra Nevada has been initiated', due to the heavy pesticide use in a neighboring a...
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DEVELOPING A KINETIC LEACHING MODEL FOR SOLIDIFIED/STABILIZED HAZARDOUS WASTES |
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It is concluded that the leaching mechanisms in the pozzolanic-based solid matrix are controlled by the free hydrogen ions available in the leachant. lkalinity leached is the conse...
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DEVELOPMENT AND APPLICATION OF THE LAKE MICHIGAN EUTRIFICATION MODEL, LM3 |
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Lake Michigan Level 3 (LM3), a high-resolution carbon-based eutrophication model, has been developed in support of a larger study designed to determine contaminant levels in Lake M...
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DEVELOPMENT AND PILOT PLANT EVALUATION OF SILICA-ENHANCED LIME SORBENTS FOR DRY FLUE GAS DESULFURIZATION (JOURNAL VERSION) |
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The paper discusses recent work on lime enhancement and testing at the bench-scale, followed by evaluation of the more promising sorbents in a pilot plant to develop low cost, retr...
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DEVELOPMENT OF AN RH -DENUDED MIE ACTIVE SAMPLING SYSTEM AND TARGETED AEROSOL CALIBRATION |
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The MIE pDR 1200 nephelometer provides time resolved aerosol concentrations during personal and fixed-site sampling. Active (pumped) operation allows defining an upper PM2.5<...
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DEVELOPMENT OF COST-EFFECTIVE NONCARBON SORBENTS FOR HG0 REMOVAL FROM COAL-FIRED POWER PLANTS |
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Noncarbon materials or mineral oxides (silica gel, alumina, molecular sieves, zeolites, and montmorillonite) were modified with various functional groups such as amine, amide, thio...
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DEVELOPMENT OF NONCARBON SORBENTS FOR HG0 REMOVAL FROM COAL-FIRED POWER PLANTS |
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Noncarbon materials or mineral oxides (silica gel, alumina, molecular sieves, zeolites, and montmorillonite) were modified with various functional groups, such as amine, amide, thi...
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DIRECT-DEPOSITION INFRARED SPECTROMETRY WITH GAS AND SUPERCRITICAL FLUID CHROMATOGRAPHY |
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A direct-deposition Fourier transform infrared (FT-IR) system has been evaluated for applicability to gas chromatography (GC) and supercritical fluid chromatography (SFC) of enviro...
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DISTRIBUTION OF IRON IN TISSUES AND CELLS OF RATS EXPOSED TO SILICA |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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Degradation product analysis from the photocatalytic oxidation/reduction of 2,4-dichlorophenol in the presence of mesoporous silica encapsulated TiO2 particles and TiO2 dispersions (presentation) |
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Thin films of Degussa P-25 TiO2 encapsulated in an SBA-15 mesoporous silica matrix were prepared. The TiO2/SBA-15 thin film structure was verified using transmission electron micr...
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EARLY EUTROPHICATION IN THE LOWER GREAT LAKES: NEW EVIDENCE FROM BIOGENIC SILICA IN SEDIMENTS |
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New evidence from studies of biogenic silica and diatoms in sediment cores indicates that eutrophication in the lower Great Lakes resulted from nutrient enrichment associated with ...
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EFFECT OF RELATIVE HUMIDITY AND ADDITIVES ON THE REACTION OF SULFUR DIOXIDE WITH CALCIUM HYDROXIDE |
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The paper gives results of a study of the reaction of SO2 with Ca(OH)2 at conditions similar to those of commercial-scale bag filters: 19-74 percent relative humidity (RH), 30.4-95...
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EFFECT OF SILICA AND VOLCANIC ASH ON THE CONTENT OF LUNG ALVEOLAR AND TISSUE PHOSPHOLIPIDS |
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Silica or volcanic ash (VA) was administered to rats via intratracheal instillation and the changes in extracellular (i.e., lavage fluid) and tissue phospholipids, as well as vario...
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EFFECT OF SILICATE GRAIN SHAPE, STRUCTURE, AND LOCATION ON THE BIOMASS AND COMMUNITY STRUCTURE OF COLONIZING MARINE MICROBIOTA |
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Microbiota colonizing silica grains of the same size and water pore space, but with a different microtopography, showed differences in biomass and community structure after 8 weeks...
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EFFECT OF WATER ON RETENTION TIME ON A FUSED SILICA COLUMN (JOURNAL VERSION) |
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Fused silica open tubular columns are efficient, mechanically strong, and relatively inert, so compounds with a variety of functional groups can be chromatographed on the same colu...
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EFFECTS OF ACIDIC PRECIPITATION ON THE WATER QUALITY OF STREAMS IN THE LAUREL HILL AREA, SOMERSET COUNTY, PA, 1983-1986 |
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Five headwater streams in the Laurel Hill area in southwestern Pennsylvania were investigated from September 1983 through February 1986 to determine possible effects of acidic prec...
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EFFECTS OF ACTIVATED CHARCOAL FILTRATION AND OZONATION ON HYDROCARBON AND CARBONYL LEVELS OF AMBIENT AIR USED IN CONTROLLED-EXPOSURE CHAMBER STUDIES OF AIR POLLUTANT HUMAN HEALTH EFFECTS |
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Air sampling experiments were done in 1985, 1987, and 1993 at the human-exposure chamber facility of the U.S. EPA Health Effects Research Laboratory in Chapel Hill, NC. easurements...
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EFFECTS OF CARBOXYLIC ACIDS ON LIQUID-PHASE ADSORPTION OF ETHANOL AND WATER BY HIGH-SILICA ZSM-5 |
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Adsorption isotherms were measured for each compound adsorbed on commercially available ZSM-5 (Si/Al = 140) powder from binary and ternary liquid mixtures of ethanol, carboxylic ac...
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EFFECTS OF FLY ASH TRANSITION METAL CONTENT AND FLUE GAS HCL/SO2 RATIO ON MERCURY SPECIATION IN WASTE COMBUSTION |
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The paper presents results of research on the effect of sulfur dioxide (SO2):HCI ratio on heterogeneous Hg0 oxidation. The addition of SO2 to moist flue gas at high SO2:HCI ratios ...
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EFFECTS OF FLY ASH TRANSITION METAL CONTENT AND FLUE GAS HCL/SO2 RATIO ON MERCURY SPECIATION IN WASTE COMBUSTION |
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The paper presents results of research on the effect of sulfur dioxide (SO2):HCI ratio on heterogeneous Hg0 oxidation. The addition of SO2 to moist flue gas at high SO2:HCI ratios ...
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EFFECTS OF NUTRIENT ENRICHMENT, LIGHT INTENSITY AND TEMPERATURE ON GROWTH OF PHYTOPLANKTON FROM LAKE HURON |
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This report contains a seasonal study on effects of nutrient enrichment, light and temperature on the growth of natural phytoplankton and three species of cultured diatoms. Natural...
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EFFECTS OF PH AND COMPETING ANIONS ON THE SOLUTION SPECIATION OF ARSENIC BY ION EXCHANGE RESINS |
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Anion-exchange resins (AER) are used to differentiate As(V) and As(III) by retaining As(V) and allowing As(III) to pass through. AERs allow rapid speciation of As in the field whi...
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EFFECTS OF PH AND COMPETING ANIONS ON THE SPECIATION OF ARSENIC IN FIXED IONIC STRENGTH SOLUTIONS BY SOLID PHASE EXTRACTION CARTRIDGES |
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Anion-exchange resins (AERs) separate As(V) and As(lIl) in solution by retaining As(V) and allowing As(lIl) to pass through. AERs offer several advantages including portability, ea...
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EFFECTS OF SELECTED ASBESTOS FIBERS ON CELLULAR AND MOLECULAR PARAMETERS |
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Embryonic cultures were used to compare the effects of five asbestos materials on a cellular, biochemical and molecular basis. Chrysotile was found to be the most cytotoxic followe...
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EFFECTS OF TEMPERATURE ON TRICHLOROETHYLENE DESORPTION FROM SILICA GEL AND NATURAL SEDIMENTS. 1. ISOTHERMS. (R822626) |
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Aqueous phase isotherms were calculated from vapor phase desorption isotherms
measured at 15, 30, and 60  C for
trichloroethylene on ...
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EFFECTS OF TEMPERATURE ON TRICHLOROETHYLENE DESORPTION FROM SILICA GEL AND NATURAL SEDIMENTS. 2. KINETICS. (R822626) |
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Isothermal desorption rates were measured at 15, 30, and 60 ![]()
src="/ncer/pubs/images/deg.gif">C for trichloroethylene (TCE) on a silica gel,
an aquifer sediment, a so...
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EFFECTS OF VELOCITY ON THE TRANSPORT OF TWO BACTERIA THROUGH SATURATED SAND. GROUND WATER. |
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Transport of the bacteria Klebsiella oxytoca and Burkholderia cepacia G4PR1 (G4PR1) was investigated in column experiments conducted under conditions that allowed us to quantify ...
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EFFICIENT AND GREENER CHEMICAL SYNTHESES USING MICROWAVE IRRADIATION |
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The diverse nature of chemical entities requires various ‘green’ strategic pathways in our quest towards attaining sustainability. A solvent-free approach involving micro...
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EFFICIENT CHEMICAL SYNTHESIS USING MICROWAVES |
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Synthetic organic transformations performed under non-traditional conditions are becoming popular primarily to circumvent the growing environmental concerns. A solvent-free approac...
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EFFICIENT CHEMICAL SYNTHESIS USING MICROWAVES |
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Synthetic organic transformations performed under non-traditional conditions are becoming popular primarily to circumvent the growing environmental concerns. A solvent-free approac...
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EFFICIENT CHEMICAL TRANSFORMATIONS USING ALTERNATIVE REACTION CONDITIONS AND MEDIA |
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The diverse nature of chemical entities requires various green' strategic pathways in our quest towards attaining sustainability. A solvent-free approach that involves microwave (M...
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ELEMENTAL ANALYSIS OF RESPIRABLE TIRE PARTICLES AND ASSESSMENT OF CARDIO-PULMONARY TOXICITY IN RATS |
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Elemental Analysis of Respirable Tire Particles and Assessment of Cardio-pulmonary Toxicity in Rats
R.R. Gottipolu, PhD1, E. Landa, PhD2, J.K. McGee, MS1, M.C. Schladweiler,...
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ELUTION OF ORGANIC SOLUTES FROM DIFFERENT POLARITY SORBENTS USING SUBCRITICAL WATER. (R825394) |
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The intermolecular interactions between organic solutes and sorbent matrices under subcritical water conditions have been investigated at a pressure of 50 bar and temperatures rang...
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EMISSIONS FROM THE CRUSHED GRANITE INDUSTRY: STATE-OF-THE-ART |
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This report describes a study of atmospheric emissions from the crushed granite industry. The potential environmental effect of this emission source was evaluated using source seve...
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ENHANCED RETENTION AND SENSITIVITY IN THE ANALYSIS OF CYANURIC ACID IN WATER USING POROUS GRAPHITIC CARBON AND UV DETECTION IN HIGH PRESSURE LIQUID CHROMATOGRAPHY |
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Cyanuric acid (CA) has found application as a chlorine stabilizer in pool waters. The National Swimming Pool Foundation recommends CA levels between 30-50 ppm and a chlorine residu...
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ENHANCED RETENTION AND SENSITIVITY IN THE ANALYSIS OF CYANURIC ACID IN WATER USING POROUS GRAPHITIC CARBON AND UV DETECTION IN HPLC |
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Cyanuric acid (CA) has found application as a chlorine stabilizer in pool waters. The National Swimming Pool Foundation recommends CA levels between 30-50 ppm and a chlorine residu...
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ENVIRONMENTAL RESEARCH BRIEF: POLLUTION PREVENTION ASSESSMENT FOR A MANUFACTURER OF AUTOMOTIVE BATTERY SEPARATORS |
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The U.S. Environmental Protection Agency (EPA) has funded a pilot project to assist small and medium-size manufacturers who want to minimize their generation of waste but who lack ...
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ENVIRONMENTALLY BENIGN ORGANIC TRANSFORMATIONS USING MICROWAVE IRRADIATION UNDER SOLVENT-FREE CONDITIONS |
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Microwave-expedited solvent-free synthetic processes involve the exposure of neat reactants to microwave (MW) irradiation in the presence of supported reagents or catalysts on mine...
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ENVIRONMENTALLY FRIENDLIER ALTERNATIVES TO CHEMICAL TRANSFORMATIONS USING NON-TRADITIONAL APPROACHES |
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Environmentally Friendlier Synthetic Alternatives
Using Non-traditional Approaches
Rajender S. Varma
Synthetic organic transformations performed under non-traditio...
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ENVIRONMENTALLY FRIENDLIER ALTERNATIVES TO ORGANIC SYNTHESIS USING MICROWAVES |
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Microwave irradiation has been used for a variety of organic transformations wherein chemical reactions are expedited because of selective adsorption of microwave (MW) energy by po...
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ENVIRONMENTALLY FRIENDLIER ORGANIC TRANSFORMATIONS ON MINERAL SUPPORTS UNDER NON-TRADITIONAL CONDITIONS |
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Synthetic organic reactions performed under non-traditional conditions are gaining popularity primarily to circumvent the growing environmental concerns. A solvent-free approach th...
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ENVIRONMENTALLY FRIENDLIER ORGANIC TRANSFORMATIONS ON MINERAL SUPPORTS UNDER NON-TRADITIONAL CONDITIONS |
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Synthetic organic reactions performed under non-traditional conditions are gaining popularity primarily to circumvent the growing environmental concerns. A solvent-free approach th...
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ENVIRONMENTALLY FRIENDLIER ORGANIC TRANSFORMATIONS ON MINERAL SUPPORTS UNDER NONTRADITIONAL CONDITIONS |
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Synthetic organic reactions performed under non-traditional conditions are gaining popularity primarily to circumvent the growing environmental concerns. A solvent-free approach th...
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ENVIRONMENTALLY FRIENDLIER SYNTHESES USING MICROWAVES AND ALTERNATIVE REACTION CONDITIONS |
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A solvent-free approach that involves microwave (MW) exposure of neat reactants (undiluted) catalyzed by the surfaces of less-expensive and recyclable mineral supports such as alum...
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ENVIRONMENTALLY FRIENDLIER SYNTHESES USING MICROWAVES AND ALTERNATIVE REACTION MEDIA |
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A solvent-free approach that involves microwave (MW) exposure of neat reactants (undiluted) catalyzed by the surfaces of less-expensive and recyclable mineral supports such as alum...
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ENVIRONMENTALLY FRIENDLIER SYNTHESIS USING ALTERNATIVE REACTION CONDITIONS AND MEDIA |
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The diverse nature of chemical universe requires various 'greener' strategic pathways in our quest towards attaining sustainability. A solvent-free approach that involves microwave...
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ENVIRONMENTALLY FRIENDLIER SYNTHETIC ALTERNATIVES USING NON-TRADITIONAL APPROACHES |
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Synthetic organic transformations performed under non-traditional conditions are becoming popular primarily to circumvent the growing environmental concerns. A solvent-free approac...
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EPISODIC EVENTS: THE EFFECT OF FLOODS ON NUTRIENT TRANSPORT IN A NORTHWESTERN, USA ESTUARY |
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To estimate the effects of storms on nutrient transport, dissolved nutrients and suspended sediment loads were measured relative to stream discharge in the Yaquina River, OR for th...
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ESTUARINE PALEOPRODUCTIVITY: A COMPARISON OF THREE INDICATORS |
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Studies of paleoproductivity have documented anthropogenic impacts on lakes and estuaries - but use of multiple measures of productivity is rare. We compare three measures used as ...
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ETHANOL, ACETIC ACID, AND WATER ADSORPTION FROM BINARY AND TERNARY LIQUID MIXTURES ON HIGH-SILICA ZEOLITES |
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Adsorption isotherms were measured for ethanol, acetic acid, and water adsorbed on high-silica ZSM-5 zeolite powder from binary and ternary liquid mixtures at room temperature. Eth...
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EVALUATION OF A SAMPLING AND ANALYSIS METHOD FOR DETERMINATION OF POLYCHLORINATED DIBENZO-P-DIOXINS AND DIBENZOFURANS IN AMBIENT AIR |
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General Metals Works PS-1 PUF air samplers and an analytical method based on high esolution gas chromatography - high resolution mass spectrometry (HRGC-HRMS) were valuated for det...
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EVALUATION OF AN EPA (ENVIRONMENTAL PROTECTION AGENCY) HIGH-VOLUME AIR SAMPLER FOR POLYCHLORINATED DIBENZO-P-DIOXINS AND POLYCHLORINATED DIBENZOFURANS |
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A High-Volume air sampler was evaluated for collection of poly-chlorinated dibenzo-p-dioxins (PCDD) and polychlorinated dibenzofurans (PCDF). The sampler consists of a filter, poly...
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EVALUATION OF EPA METHOD 8120 FOR DETERMINATION OF CHLORINATED HYDROCARBONS IN ENVIRONMENTAL SAMPLES |
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Method 8120 of EPA Manual SW-846 has been evaluated in a single-laboratory study. Modifications made to the current method invlude expansion of the list of target compounds from 15...
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EVALUATION OF FGD DRY INJECTION SORBENTS AND ADDITIVES: VOLUME 1. DEVELOPMENT OF HIGH REACTIVITY SORBENTS |
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The report discusses recent work addressing lime enhancement by slurrying with siliceous materials and testing in a laboratory packed-bed reactor, as part of EPA's efforts to devel...
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EVALUATION OF FGD DRY INJECTION SORBENTS AND ADDITIVES: VOLUME 2. PILOT PLANT EVALUATION OF HIGH REACTIVITY SORBENTS |
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The report describes a mini-pilot test program to investigate potential new sorbents and processes for dry SO2 removal. Initial tests showed that the 85 cu m/h pilot plant could be...
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EVALUATION OF FUSED-SILICA CAPILLARY COLUMNS FOR GC/CD ANALYSIS OF CHLORINATED HYDROCARBONS LISTED IN EPA METHOD 8120 |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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EVALUATION OF FUSED-SILICA CAPILLARY COLUMNS FOR GC/ECD (GAS CHROMATOGRAPHY WITH ELECTRON CAPTURE DETECTION) ANALYSIS OF CHLORINATED HYDROCARBONS LISTED IN EPA (ENVIRONMENTAL PROTECTION AGENCY) METHOD 8120 (JOURNAL VERSION) |
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Four mega-bore, one wide-bore, and one narrow-bore fused-silica capillary columns were evaluated for their applicability to the GC/ECD analysis of 22 chlorinated hydrocarbons, some...
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EVALUATION OF INNOVATIVE PAINTING PROCESSES |
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The report gives results of an evaluation of two novel spray painting techniques that may decrease volatile organic compound (VOC) emissions associated with the application of surf...
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EVALUATION OF METHODOLOGY FOR DETERMINATION OF POLYHALOGENATED DIBENZO-P-DIOXINS AND DIBENZOFURANS IN AMBIENT AIR |
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General Metals works PS-1 PUF air samplers and an analytical method based on high resolution gas chromatography - high resolution mass spectrometry (HRGC-HRMS) were evaluated for d...
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EVALUATION OF METHODS FOR HAZARDOUS CHEMICALS LISTED IN APPENDIX D TO 40 CFR 122 (TABLE 5) |
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Of 75 organic compounds listed in Appendix D to 40 CRF 122 (Table V), 24 compounds have not been previously shown amenable to existing EPA Methods for analysis in water and wastewa...
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EVALUATION OF RAPID DNA EXTRACTION PROCEDURES FOR THE QUANTITATIVE DETECTION OF FUNGAL CELLS USING REAL TIME PCR ANALYSIS |
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The ease and rapidity of quantitative DNA sequence detection by real-time PCR instruments promises to make their use increasingly common for the microbial analysis many different t...
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EVALUATION OF SAMPLE EXTRACT CLEANUP USING SOLID-PHASE EXTRACTION CARTRIDGES |
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Fractionation and cleanup of sample extracts prior to instrumental analysis is usually accomplished by column chromatography, gel permeation chromatography, or acid-base partitioni...
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EVALUATION OF SILICA GEL CARTRIDGES COATED IN SITU WITH ACIDIFIED 2,4-DINITROPHENYLHYDRAZINE FOR SAMPLING ALDEHYDES AND KETONES IN AIR |
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A procedure for coating in-situ silica in commercially available prepacked cartridges with 2,4-dinitrophenylhydrazine (DNPH) acidified with hydrochloric acid is described. The coat...
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EXPEDITIOUS SOLVENT-FREE ORGANIC SYNTHESES USING MICROWAVE IRRADIATION |
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Microwave-expedited solvent-free synthetic processes involve the exposure of neat reactants to microwave (MW) irradiation in the presence of supported reagents or catalysts on mine...
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EXPEDITIOUS SYNTHETIC TRANSFORMATIONS USING MICROWAVES |
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Microwave-expedited solvent-free synthetic processes will be described for the synthesis of a variety of industrially significant compounds and intermediates namely, enamines, nitr...
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EXPOSURE AND HUMAN HEALTH EVALUATION OF AIRBORNE POLLUTION FROM THE WORLD TRADE CENTER DISASTER |
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In the days following the September 11, 2001, terrorist attack on New York City's World Trade Center (WTC) towers, many Federal agencies, including the U.S. Environmental Protectio...
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EXTENSION OF MULTI-RESIDUE METHODOLOGY. I. DETERMINING MULTICLASS PESTICIDE RESIDUES IN SOIL BY GAS CHROMATOGRAPHY. II. DYNAMIC FLUOROGENIC LABELLING DETECTOR FOR CARBAMATES |
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A multi-residue procedure was devised for the extraction, cleanup and determination of forty seven pesticides in fortified soil samples. Most of the compounds were determined by ga...
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Efficient Syntheses of Organics and Nanomaterials Using Microwaves |
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A brief account of reactions involving microwave (MW) exposure of neat reactants or catalyzed by mineral support surfaces, such as alumina, silica, clay, or their ‘doped’ versions,...
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FATE AND EFFECTS OF PENTACHLOROPHENOL IN HARD- AND SOFT-WATER MICROCOSMS |
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The influence of hard water and soft water on the fate and effects of pentachlorophenol (PCP) was investigated in small microcosms. Minor differences in the fate of PCP and minor c...
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FATE OF TOXIC AND HAZARDOUS MATERIALS IN THE AIR ENVIRONMENT |
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The atmospheric fate of potentially toxic/hazardous chemicals currently undergoing assessment by EPA was evaluated. Both chemical and physical removal processes are discussed. Math...
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FERRITIN EXPRESSION AFTER IN VITRO EXPOSURES OF HUMAN ALVEOLAR MACROPHAGES TO SILICA IS IRON-DEPENDENT |
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The increased availability of catalytically active iron after silica exposure can present an oxidative injury to a living system. Sequestration of reactive iron would, therefore, c...
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FISH COMMUNITIES IN LAKE IN SUBREGION 2B (UPPER PENINSULA OF MICHIGAN) IN RELATION TO LAKE ACIDITY: VOLUME I |
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Surveys of fish community status were conducted in summer 1987 in 49 lakes in Subregion 20, the Upper Peninsula of Michigan, as part of Phase II of the Eastern Lake Survey. Lake se...
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FISH COMMUNITIES IN LAKE IN SUBREGION 2B (UPPER PENINSULA OF MICHIGAN) IN RELATION TO LAKE ACIDITY: VOLUME II. APPENDICES |
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Surveys of fish community status were conducted in summer 1987 in 49 lakes in Subregion 20, the Upper Peninsula of Michigan, as part of Phase II of the Eastern Lake Survey. Lake se...
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FLY ASH RECYCLE IN DRY SCRUBBING |
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The paper describes effects of fly ash recycle in dry scrubbing. (Previous workers have shown that the recycle of product solids improves the utilization of slaked lime--Ca(OH)2--f...
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FORMATION OF ACIDIC TRACE ORGANIC BY-PRODUCTS FROM THE CHLORINATION OF HUMIC ACIDS |
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A method for concentrating and analyzing acidic trace organics produced by the chlorination of humic acids at concentrations approximating common drinking water levels is described...
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FORMATION OF TRACE BYPRODUCTS IN THE PREMIXED FLAMES OF CH3CL/C2H4. (R825412) |
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The chemical structure of an atmospheric pressure, fuel-rich (equivalence
ratio 3.06), flat flame of a chloromethane and ethylene
(CH3Cl/C2H4<...
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FRESHWATER ASSAY USING SOIL ELUATES AS SAMPLE MATERIAL (SINGLE LABORATORY EVALUATION) |
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The Chlorophyta assay, which uses soil as sample material, has been a useful bioassessment technique for screening hazardous waste site problems. n eluate is prepared from a 125-gr...
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FUGITIVE AND FINE PARTICLE CONTROL USING ELECTROSTATICALLY CHARGED FOG |
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The report gives results of a study of fugitive and fine particle control using electrostatically charged fog. Most industrial pollutants acquire an electrostatic charge as they ar...
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FUNCTIONAL AND BIOCHEMICAL INDICATORS OF PNEUMOCONIOSIS IN MICE: COMPARISON WITH RATS |
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Mice were injected intratracheally with silica or Mt. St. Helens volcanic ash (0.2 mg/g body weight) and examined 6 months later for changes in lung function, histology, and hydrox...
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FURTHER CHARACTERIZATION OF SORBENTS FOR ENVIRONMENTAL SAMPLING |
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The report gives results of an ongoing experimental program to evaluate the breakthrough characteristics of sorbent resins for sampling of organic vapors using an elution analysis ...
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FUSED SILICA CAPILLARY COLUMN GC/MS FOR THE ANALYSIS OF PRIORITY POLLUTANTS |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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FUSED SILICA CAPILLARY COLUMN GC/MS FOR THE ANALYSIS OF PRIORITY POLLUTANTS |
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Operational characteristics have been determined for fused silica capillary column (FSCC) GC/MS as applied to 'extractable' priority pollutants. Chromatographic data show excellent...
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FUSED SILICA CAPILLARY COLUMN GC/MS QUALITY CONTROL PROTOCOL FOR THE DETERMINATION OF SEMIVOLATILE PRIORITY POLLUTANTS |
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This quality control protocol is intended to serve as a guide to those laboratories employing fused silica capillary column (FSCC) gas chromatographic/mass spectrometric (GC/MS) te...
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GAS CHROMATOGRAPHIC METHOD FOR QUANTITATIVE DETERMINATION OF C2 TO C13 HYDROCARBONS IN ROADWAY VEHICLE EMISSIONS |
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A gas chromatographic system was used to quantitate more than 300 gas-phase hydrocarbons from background and roadside ambient air samples. Samples were simultaneously collected in ...
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GC/MS METHODOLOGY FOR PRIORITY ORGANICS IN MUNICIPAL WASTEWATER TREATMENT |
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A state-of-the-art review is presented on the current GC/MS methodology for the analysis of priority toxic organics in municipal wastewater treatment. The review summarizes both re...
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GREENER APPROACH TO EFFICIENT ORGANIC SYNTHESES USING MICROWAVES |
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Microwave irradiation has been used for a variety of organic transformations wherein chemical reactions are expedited because of selective adsorption of microwave (MW) energy by po...
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GREENER CHEMICAL SYNTHESES USING ALTERNATIVE REACTION CONDITIONS AND MEDIA |
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A solvent-free approach that involves microwave (MW) exposure of neat reactants (undiluted) catalyzed by the surfaces of recyclable mineral supports such as alumina, silica, clay, ...
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GREENER CHEMICAL SYNTHESES USING ALTERNATIVE REACTION CONDITIONS AND MEDIA (BRAZIL 2006) |
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A solvent-free approach that involves microwave (MW) exposure of neat reactants (undiluted) catalyzed by the surfaces of recyclable mineral supports such as alumina, silica, clay, ...
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GREENER CHEMICAL SYNTHESES USING ALTERNATIVE REACTION CONDITIONS AND MEDIA (MARCH 2006) |
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A solvent-free approach that involves microwave (MW) exposure of neat reactants (undiluted) catalyzed by the surfaces of recyclable mineral supports such as alumina, silica, clay, ...
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GREENER CHEMICAL SYNTHESES USING MICROWAVE IRRADIATION |
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Greener solvent-free protocols involve microwave (MW) exposure of neat reactants catalyzed by the surfaces of recyclable mineral supports such as alumina, silica and clay which are...
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GREENER CHEMICAL SYNTHESIS USING MICROWAVES |
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A solvent-free approach that involves microwave (MW) exposure of neat reactants (undiluted) catalyzed by the surfaces of recyclable mineral supports such as alumina, silica, clay,...
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GREENER ORGANIC SYNTHESES USING ALTERNATIVE REACTION CONDITIONS AND MEDIA |
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The diverse nature of chemical entities requires various green' strategic pathways in our quest towards attaining sustainability. A solvent-free approach that involves microwave (M...
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GREENER SYNTHESIS OF HETEROCYCLIC COMPOUNDS USING MICROWAVE IRRADIATION |
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An introduction of our interest in the microwave-assisted greener synthesis of a variety of heterocyclic compounds will be presented. It involves microwave (MW) exposure of neat r...
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GREENER SYNTHETIC TRANSFORMATIONS USING MICROWAVES |
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Microwave irradiation has been used for a variety of organic transformations wherein chemical reactions are expedited because of selective adsorption of microwave (MW) energy by po...
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Green Synthetic Alternatives to Organic Compounds and Nanomaterials |
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A brief account of reactions involving microwave (MW) exposure of neat reactants or catalyzed by mineral support surfaces, such as alumina, silica, clay, or their ‘doped’ versions,...
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Green Synthetic Alternatives to Organic Compounds and Nanomaterials-May 2008 |
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A brief account of reactions involving microwave (MW) exposure of neat reactants or catalyzed by mineral support surfaces, such as alumina, silica, clay, or their ‘doped’ versions,...
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Green Synthetic Alternatives to Organic Molecules and Nanomaterials |
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A brief account of reactions involving microwave (MW) exposure of neat reactants or catalyzed by mineral support surfaces, such as alumina, silica, clay, or their ‘doped’ versions,...
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Greener Alternatives to Expedient Synthesis of Heterocycles and Nanomaterial |
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A brief account of reactions involving microwave (MW) exposure of neat reactants or catalyzed by mineral support surfaces, such as alumina, silica, clay, or their ‘doped’ versions,...
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Greener Synthesis of Organics and Nanomaterials |
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A brief account of reactions involving microwave (MW) exposure of neat reactants or catalyzed by mineral support surfaces, such as alumina, silica, clay, or their ‘doped’ versions,...
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Greener Synthetic Alternatives to Heterocycles, Nanomaterials and Nanocomposites |
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Microwave (MW) expedited reaction of neat reactants or catalyzed by mineral support surfaces, such as alumina, silica, clay, or their ‘doped’ versions, for the rapid one-pot assemb...
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Greener Synthetic Alternatives to Organic Molecules and Nanomaterials |
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A brief account of reactions involving microwave (MW) exposure of neat reactants or catalyzed by mineral support surfaces, such as alumina, silica, clay, or their ‘doped’ versions,...
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HEALTH EFFECTS OF INHALED CRYSTALLINE AND AMORPHOUS SILICA |
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Recently, public concern regarding nonoccupational or ambient silica exposure, mainly to crystalline silica, has emerged making it important to evaluate background and ambient conc...
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HEXAGONAL, HOLLOW, ALUMINUM-CONTAINING ZSM-5 TUBES PREPARED FROM MESOPOROUS SILICA TEMPLATES. (R829600) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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HIGH-RESOLUTION PCB (POLYCHLORINATED BIPHENYLS) ANALYSIS: SYNTHESIS AND CHROMATOGRAPHIC PROPERTIES OF ALL 209 PCB CONGENERS |
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This paper reports the synthesis and spectroscopic properties of all the mono-, di-, tri-, tetra-, penta-, hexa- and heptachlorobiphenyls and completes the synthesis of all 209 pol...
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HOW ARE THE PHYSICAL AND CHEMICAL PROPERTIES OF CHRYSOTILE ASBESTOS ALTERED BY A 10-YEAR RESIDENCE IN WATER AND UP TO 5 DAYS IN SIMULATED STOMACH ACID |
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While there are many studies concerning the ingestion of chrysotile asbestos, there are a few studies concerning how the chrysotile asbestos itself is altered by the exposure to th...
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HYDROPHOBIC ZEOLITE-SILICONE RUBBER MIXED MATRIX MEMBRANES FOR ETHANOL-WATER SEPARATION: EFFECT OF ZEOLITE AND SILICONE COMPONENT SELECTION ON PERVAPORATION PERFORMANCE |
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High-silica ZSM 5 zeolites were incorporated into poly(dimethyl siloxane) (PDMS) polymers to form mixed matrix membranes for ethanol removal from water via pervaporation. Membrane...
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IDENTIFICATION OF ORGANIC COMPOUNDS IN A MUTAGENIC EXTRACT OF A SURFACE DRINKING WATER BY A COMPUTERIZED GAS CHROMATOGRAPHY/MASS SPECTROMETRY SYSTEM (GC/MS/COM) |
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The organics in a Cincinnati, Ohio drinking water sample were concentrated by a reverse osmosis (RO) process. The diethyl ether soluble extract of the RO concentrate which proved t...
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IMMUNOCHEMICAL DETERMINATION OF DIOXINS IN SEDIMENT AND SERUM SAMPLES |
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Polychlorinated dibenzo-p-dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs) are considered highly toxic contaminants and the environmental and biological monitoring of th...
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IMMUNOCHEMICAL DETERMINATION OF DIOXINS IN SEDIMENT SAMPLES |
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Polychlorinated dibenzo-p-dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs) are considered highly toxic contaminants with the environmental monitoring of these compounds be...
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IMPACT OF SUSPENDED PARTICULATES ON PCB VOLATILIZATION FROM SEDIMENTS |
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The objective of this research was to experimentally quantify the mass of PCBs that can be transported from PCB-contaminated suspended particulate to the air phase under various co...
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IMPROVED SILICA GEL CLEANUP METHOD FOR ORGANOPHOSPHORUS PESTICIDES |
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Quantitative recovery of some organophosphorus pesticide residues has not been possible with existing silica gel-cleanup procedures. The authors have developed a modification that ...
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INFLUENCE OF PEAT ON FENTON OXIDATION |
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A diagnostic probe was used to estimate the activity of Fenton-derived hydroxyl radicals (@OH), reaction kinetics, and oxidation efficiency in batch suspensions comprised of silica...
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INFLUENCE OF PEAT ON FENTON OXIDATION: JOURNAL ARTICLE |
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NRMRL-ADA-99303
Huling*, S.G., Arnold, R.G., Sierka, R.A., and Miller, M.R. Influence of Peat on Fenton Oxidation. Published in: Water Res...
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INFLUENCE OF SEDIMENT EXTRACT FRACTIONATION METHODS ON BIOASSAY RESULTS |
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Four bioassays [Microtax(tm), Mutatox(tm), sister chromatid exchange (SCE), and metabolic cooperation] were used to analyze marine sediment extracts fractionated by two different m...
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INHALABLE PARTICLES AND PULMONARY HOST DEFENSE: 'IN VIVO' AND 'IN VITRO' EFFECTS OF AMBIENT AIR AND COMBUSTION PARTICLES |
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The ability of particulate air pollutants (and possible constituents) to alter pulmonary host defenses was examined using an in vitro alveolar macrophage cytotoxicity assay and an ...
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INVESTIGATOIN OF CYANOBACTERIA TOXINS IN WATER |
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Introduction:
Approximately 80 alkaloid and cyclic peptide toxins produced by various freshwater and marine cyanobacteria (blue-green algae) have been identified and their s...
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IRON REGULATES XANTHINE OXIDASE ACTIVITY IN THE LUNG |
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The iron chelator deferoxamine has been reported to inhibit both xanthine oxidase (XO) and xanthine dehydrogenase activity, but the relationship of this effect to the availability ...
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Iron homeostatis and oxidative stress in idiopathic pulmonary alveolar proteinosis: a case-control study |
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ABSTRACT: BACKGROUND: Lung injury caused by both inhaled dusts and infectious agents depends on increased availability of iron and metal-catalyzed oxidative stress. Because inhaled...
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KINETIC STUDY OF ADSORPTION AND TRANSFORMATION OF MERCURY ON FLY ASH PARTICLES IN AN ENTRAINED FLOW REACTOR |
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Experimental studies were performed to investigate the interactions of elemental mercury vapor with entrained fly ash particles from coal combustion in a flow reactor. The rate of ...
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LAKE-WIDE SEASONAL CHANGES IN LIMNOLOGICAL CONDITIONS IN LAKE MICHIGAN IN 1976 |
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Data collected on lake-wide cruises in 1976 were used to study seasonal and vertical variations in water temperature, transparency, chlorophyll a, and nutrients in Lake Michigan. D...
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LARGE-SCALE PREPARATION OF POTASSIUM HYDROXIDE-MODIFIED SILICA GEL ADSORBENT |
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A large-scale method, using custom-made apparatus, is described for making potassium hydroxide-modified silica gel. atches as large as 2.3 kg can be made in 16 man-hours. maller-sc...
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LASER FLUORESCENCE EEM PROBE FOR CONE PENETROMETER POLLUTION ANALYSIS |
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A fiber optic LIF (Laser induced fluorescence) EEM (Excitation emission matrix) instrument for CPT deployment has been successfully developed and field tested. The system employs ...
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LASER FLUORESCENCE EEM PROBE FOR CONE PENETROMETER POLLUTION ANALYSIS (EPA/600/R-99/041) |
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A fiber optic LIF (Laser induced fluorescence) EEM (Excitation emission matrix) instrument for CPT deployment has been successfully developed and field tested. The system employs a...
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LAVAGE PHOSPHOLIPID CONCENTRATION AFTER SILICA INSTILLATION IN THE RAT IS ASSOCIATED WITH COMPLEXED (FE3+) ON THE DUST SURFACE |
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Airborne particles often contain transition metals, such as iron. his study suggests that silica particles, which have long been known to be toxic to the respiratory tract, contain...
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LIMNOLOGICAL CONDITIONS IN SOUTHERN LAKE HURON, 1974 AND 1975 |
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In 1974 and 1975, several studies were conducted on southern Lake Huron and outer Saginaw Bay to obtain seasonal data on limnological conditions. In 1974, 44 stations were sampled ...
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LIMNOLOGY OF MICHIGAN'S NEARSHORE WATERS OF LAKES SUPERIOR AND HURON |
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Limnological assessments, including water and sediment chemistry, bacterial densities, zoo- and phyto-plankton and benthic macroinvertebrate community structure, and fish contamina...
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LIPID BIOMARKER ANALYSIS OF MARINE DINOFLAGELLATES |
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Many marine eukaryotic algae have been shown to possess characteristic chemotaxonomic lipid biomarkers. Dinoflagellates in particular are often characterized by the presence of ste...
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LIPID BIOMARKER CHARACTERIZATION OF BLOOM-RELATED DINOFLAGELLATES |
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Marine eukaryotic algae synthesize an array of lipids of chemotaxonomic utility that are potentially valuable in characterizing phytoplankton communities. Sterols and photopigments...
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LIPID BIOMARKER CHARACTERIZATION OF BLOOM-RELATED DINOFLAGELLATES AND OTHER EUKARYOTIC ALGAE |
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Marine eukaryotic algae synthesize an array of lipids of chemotaxonomic utility that are potentially valuable in characterizing phytoplankton communities. Sterols and photopigments...
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LUNG INJURY AFTER SILICA INSTILLATION IS ASSOCIATED WITH AN ACCUMULATION OF IRON IN RATS |
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Lung exposures to incompletely chelated iron can result in a neutrophilic alveolitis. We tested the hypothesis that the acute lung inflammatory injury after intratracheal instillat...
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MAJOR ION CHEMISTRY OF LAKES ON THE KENAI PENINSULA, ALASKA |
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A probability sample of 59 lakes was conducted in August, 1988 to characterize the major ion chemistry of a population of over 800 lakes on the Kenai Peninsula, AK. here were two g...
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MATHEMATICAL MODELS OF WATER QUALITY IN LARGE LAKES. PART 1: LAKE HURON AND SAGINAW BAY |
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This research was undertaken to develop and apply a mathematical model of the water quality in large lakes, particularly Lake Huron and Saginaw Bay and Lake Erie. A mathematical mo...
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MEASURED AND PREDICTED FLUXES OF BIOGENIC SILICA IN LAKE MICHIGAN |
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Diatom production in the offshore waters of Lake Michigan is limited by silica supplies in late summer and can be predicted from the seasonal disappearance of silica from the troph...
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MEASUREMENT OF BIOGENIC EMISSION FROM CORN |
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A pilot study was conducted to determine whether techniques for measuring biogenic emissions from tree saplings, branches, and leaves could be adapted to the measurement of biogeni...
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MEASUREMENTS OF CAPILLARY PRESSURE-SATURATION RELATIONSHIPS AND DNAPL DISTRIBUTION IN SILICA SANDS USING LIGHT TRANSMISSION VISUALIZATION |
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This study is a part of an ongoing research project that aims at assessing the environmental benefits of partial DNAPL removal. The laboratory part of the research project is to ex...
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MEASUREMENTS OF POLYCYCLIC AROMATIC HYDROCARBONS IN AMBIENT AIR PARTICULATES IN NORTHERN NEW ENGLAND |
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The paper gives results of measuring polycyclic aromatic hydrocarbons (PAHs) in ambient air particulates in Northern New England. Standard high-volume filter samples of ambient-air...
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MECHANISMS OF ACTION OF INHALED FIBERS, PARTICLES AND NANOPARTICLES IN LUNG AND CARDIOVASCULAR DISEASES |
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ABSTRACT: A symposium on the mechanisms of action of inhaled airborne particulate matter (PM),pathogenic particles and fibers such as silica and asbestos, and nanomaterials, defin...
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MERCURY SPECIATION IN COMBUSTION SYSTEMS: STUDIES WITH SIMULATED FLUE GASES AND MODEL FLY ASHES |
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The paper gives results of a bench-scale study of the effects of flue gas and fly ash parameters on the oxidation of elemental mercury in simulated flue gases containing hydrogen c...
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METHODOLOGY FOR THE DETERMINATION OF DINITROANILINE HERBICIDES IN TISSUE AND EXCRETA |
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A method is presented for the analysis of trace amounts of dinitroaniline herbicides in tissue and excreta. The method employs extraction of the tissue or excreta with organic solv...
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MICROCALORIMETRIC, FTIR AND DFT STUDIES OF THE ADSORPTION OF METHANOL, ETHANOL, AND 2,2,2-TRIFLUOROETHANOL ON SILICA. (R825370C056) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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MICROWAVE IRRADIATION IN BENIGN SYNTHESIS OF HETEROCYCLES, NOBLE NANOMETALS AND NANOCOMPOSITES |
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A brief historic account of reactions involving microwave (MW) exposure of neat reactants or catalyzed by mineral support surfaces, such as alumina, silica, clay, or their ‘doped’ ...
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MICROWAVE IRRADIATION IN BENIGN SYNTHESIS OF ORGANIC MOLECULES, NOBLE NANOMETALS AND NANOCOMPOSITES |
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A brief historic account of reactions involving microwave (MW) exposure of neat reactants or catalyzed by mineral support surfaces, such as alumina, silica, clay, or their ‘doped’ ...
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MICROWAVES IN ORGANIC SYNTHESIS |
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The effect of microwaves, a non-ionizing radiation, on organic reactions is described both in polar solvents and under solvent-free conditions. The special applications are highlig...
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MICROWAVES IN ORGANIC SYNTHESIS: BOOK CHAPTER |
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NRMRL-CIN-1316 Varma*, R.S. "Microwaves in Organic Synthesis." Published in: McGraw-Hill 2002 Yearbook of Science and Technology, New York: McGraw-Hill, 2001, 223-225. 02/21/2001 ...
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MICROWAVES: FROM MYTH, MYSTERY AND MAGIC TO A FAST-MOVING FRONTIER |
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A historical account of the utility of microwaves in a variety of chemical applications will be highlighted including solvent-free approach that involves microwave (MW) exposure of...
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MINERAL WEATHERING RATES FROM SMALL-PLOT EXPERIMENTS, WMP SITE, BEAR BROOKS, MAINE |
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The pH-dependence of silicate mineral weathering rates was measured in small-plot experiments at the Bear Brooks Watershed Manipulation Project site in Maine, U.S.A. ix 2 m2 plots ...
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MINERALIZATION OF A SORBED POLYCYCLIC AROMATIC HYDROCARBON IN TWO SOILS USING CATALYZED HYDROGEN PEROXIDE. (R826163) |
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Hydrogen peroxide (H2O2) catalyzed by soluble iron or naturally occurring soil minerals, (i.e., modified Fenton's reagent) was investigated as a basis for ...
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MODULATION OF EICOSANOID PRODUCTION BY HUMAN ALVEOLAR MACROPHAGES EXPOSED TO SILICA IN VITRO |
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Repeated inhalation of silica dust can lead to inflammation and fibrosis in human lung and in experimental animal models. he alveolar macrophage is believed to play a pivotal role ...
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NHEXAS PHASE I REGION 5 STUDY--STANDARD OPERATING PROCEDURE--ANALYSIS OF VOLATILE ORGANIC COMPOUNDS FROM CHARCOAL BADGES BY GAS CHROMATOGRAPHY/MASS SPECTROMETRY (RTI/ACS-AP-209-112) |
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This protocol provides guidelines for determining volatile organic hydrocarbons (VOCs) in air samples by gas chromatography/mass spectrometry (GC/MS). This method is for the analys...
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NON-PURGEABLE VOLATILE ORGANIC COMPOUNDS RAPIDLY DETERMINED BY GAS CHROMATOGRAPHY/MASS SPECTROMETRY USING DIRECT AQUEOUS INJECTION |
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A direct aqueous injection (DAI) method was developed for the determination of 18 non-purgeable volatile organic compounds of which nine have no EPA-approved method. hese polar liq...
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NON-TRADITIONAL 'GREENER' ALTERNATIVES OR ORGANIC TRANSFORMATIONS |
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Non-traditional 'Greener' Alternatives to Organic Transformations
Synthetic organic transformations performed under non-traditional conditions are becoming popular prim...
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NON-TRADITIONAL 'GREENER' ALTERNATIVES TO CHEMICAL TRANSFORMATIONS |
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Synthetic organic transformations performed under non-traditional conditions are becoming popular primarily to circumvent the growing environmental concerns. A solvent-free approac...
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NON-TRADITIONAL 'GREENER' ALTERNATIVES TO ORGANIC SYNTHESES |
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Synthetic organic transformations performed under non-traditional conditions are becoming popular primarily to circumvent the growing environmental concerns. A solvent-free approac...
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NON-TRADITIONAL 'GREENER' ALTERNATIVES TO SYNTHETIC ORGANIC TRANSFORMATIONS |
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Non-traditional 'Greener' Alternatives to Synthetic Organic Transformations
Rajender S. Varma
Synthetic organic transformations performed under non-traditional condition...
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NON-TRADITIONAL 'GREENER' ALTERNATIVES TO SYNTHETIC ORGANIC TRANSFORMATIONS USING MICROWAVES |
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A rapid and environmentally friendlier approach for organic synthesis and transformations is described which involves microwave (MW) exposure of neat reactants (undiluted) often in...
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NON-TRADITIONAL 'GREENER' ALTERNATIVES TO SYNTHETIC ORGANIC TRANSFORMATIONS USING MICROWAVES |
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Non-traditional 'Greener' Alternatives to synthetic Organic Transformations Using Microwaves
A rapid and environmentally friendlier approach for organic synthesis and trans...
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NON-TRADITIONAL APPROACHES FOR PHARMACEUTICALLY RELEVANT SYNTHETIC TRANSFORMATIONS |
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A rapid and environmentally friendlier approach for organic synthesis, and transformations is described which involves microwave (MW) exposure of neat reactants (undiluted) often i...
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NONMETHANE ORGANIC CARBON CONCENTRATIONS IN AIR MASSES ADVECTED INTO URBAN AREAS IN THE UNITED STATES |
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The report describes recent aircraft sampling programs to measure nonmethane organic carbon (NMOC) levels aloft in the upwind vicinity of several U.S. cities during the morning per...
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NONPHOTOCHEMICAL DECOMPOSITION OF FLUORENE VAPOR-ADSORBED ON COAL FLY ASH |
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Fluorene is representative of a group of polycyclic aromatic hydrocarbons that have been shown to exhibit oxidation in the absence of light when adsorbed on fly ash. The present st...
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NOVEL SYNTHETIC METHOD FOR NARROW DISTRIBUTED COLLOIDAL SILICALITE |
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Preparation of zeolites is important for a variety of applications such as microelectronics, separation agents, ion exchange, catalysis, adsorbents, nanocomposites and zeolite memb...
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NUTRIENT REGENERATION BY ZOOPLANKTON IN SOUTHERN LAKE HURON |
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Rates of nutrient regeneration by zooplankton (micromolecule/mg dry wt/hr) in southern Lake Huron from April to August 1975 ranged from undetectable to 2.6 for total phosphorus (TP...
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NUTRIENT RELEASE RATES FROM THE SEDIMENTS OF SAGINAW BAY, LAKE HURON |
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Direct measurements of net production rates and pore water profiles of solutes in the fine-grained sediments of Saginaw Bay, imply corresponding steady-state fluxes to the overlyin...
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OBSERVATIONS OF PHYTOPLANKTON SIZE STRUCTURE, NUTRIENTS, VARIABLE FLOURESCENCE, AND ALGAL PHOSPHATASE ACTIVITY IN A GULF COAST ESTUARY |
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During 2001, phytoplankton dynamics, physiology, and related environmental conditions were studied in Santa Rosa Sound, Florida, USA, at near-weekly intervals. Santa Rosa Sound is ...
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OPTIMIZATION OF SILICA GEL CHROMATOGRAPHIC CLEANUP/FRACTIONATION PROCEDURE FOR ANALYZING PAHS AND PCB: IN SEDIMENTS. (R828678C008) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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OPTIMIZING THE PAKS METHOD FOR MEASURING AIRBORNE ACROLEIN |
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Airborne acrolein is produced from the combustion of fuel and tobacco and is of concern due to its potential for respiratory tract irritation and other adverse health effects. Ac...
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OPTIMIZING THE PAKS METHOD FOR MEASURING AIRBORNE ACROLEIN |
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Airborne acrolein is produced from the combustion of fuel and tobacco and is of concern due to its potential for respiratory tract irritation and other adverse health effects. DN...
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ORGANIC SYNTHESES IN SOLVENT-FREE AND AQUEOUS MEDIA USING MICROWAVES |
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A solvent-free approach that involves microwave (MW) exposure of neat reactants (undiluted) catalyzed by the surfaces of recyclable mineral supports such as alumina, silica, clay, ...
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ORGANIC SYNTHESES UNDER NON-TRADITIONAL CONDITIONS |
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A solvent-free approach that involves microwave (MW) exposure of neat reactants (undiluted) catalyzed by the surfaces of recyclable mineral supports such as alumina, silica, clay, ...
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OXYGENATED ORGANIC COMPOUND CONCENTRATIONS NEAR A ROADWAY IN LITHUANIA, SSR |
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During the period June 1 to June 9, 1989, aldehyde and other oxygenated organic compound concentrations were examined at sites 3, 10, and 80 meters northeast of the Vilnius-Kaunas ...
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PAPER FIBERS AS A CARBON SOURCE FOR THE DE NOVO FORMATION OF POLYCHLORINATED DIOXINS AND FURANS |
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Formation of polychlorinated dibenzo-p-dioxins and polychlorinated dibenzefurans (PCDDs/Fs) from carbons that were produced from pyrolysis of paper fibers and from a wood charcoal ...
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PETROLEUM HYDROCARBONS IN THE NORTHERN PUGET SOUND AREA. A PILOT DESIGN STUDY |
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Hydrocarbon baseline data are needed to assess the potential impact of oil contamination from increased tanker traffic in the Strait of Juan de Fuca. Initial studies were directed ...
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PHOTODECOMPOSITION OF A COMMERCIAL POLYBROMINATED BIPHENYL FIRE RETARDANT: HIGH-RESOLUTION GAS CHROMATOGRAPHIC ANALYSIS |
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The photolytic degradation of fireMaster BP-6, a commercial polybrominated biphenyl (PBB) fire retardant, was investigated by using high-resolution, isomer-specific, fused silica c...
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PHYSICAL AND CHEMICAL PARAMETERS OF SEDIMENT EXTRACTION AND FRACTIONATION THAT INFLUENCE TOXICITY AS EVALUATED BY MICROTOX |
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Several physical and chemical parameters of sediment extraction and fractionation of organic compounds that influence bioassay results were evaluated. ach parameter was evaluated w...
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PHYSICAL CHARACTERISTICS AND HEALTH EFFECTS OF AEROSOLS FROM COLLAPSED BUILDINGS |
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Airborne pollutants can rise to extreme levels when large buildings fall down. The terrorist attack on New York's World Trade Center (WTC) towers caused the release of an enormous ...
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PHYSICAL, CHEMICAL AND BIOLOGICAL CONDITIONS OF THE SAGAVANIRKTOK RIVER AND NEARBY CONTROL STREAMS, SHAVIOVIK AND CANNING RIVERS |
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Biological, physical and chemical data were collected from 28 stations on the Sagavanirktok River and five of its tributaries, the Canning River, Shaviovik River, two tundra lakes ...
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PHYTOPLANKTON DYNAMICS IN A GULF OF MEXICO ESTUARY: TIME SERIES OF SIZE STRUCTURE, NUTRIENTS, VARIABLE FLUORESCENCE AND ALGAL PHOSPHATASE ACTIVITY |
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Relationships between phytoplankton dynamics and physiology, and environmental conditions were studied in Santa Rosa Sound, Florida, USA, at near-weekly intervals during 2001. Sant...
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POLLUTION PREVENTION ASSESSMENT FOR A MANUFACTURER OF AUTOMOTIVE BATTERY SEPARATORS (EPA/600/S-95/011) |
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The U.S. Environmental Protection Agency (EPA) has funded a pilot project to assist small and medium-size manufacturers who want to minimize their generation of waste but who lack ...
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POLYSILOXANE DEACTIVATED FUSED SILICA CAPILLARIES CONTAINING IMMOBILIZED STATIONARY PHASES |
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This article describes a method of preparing immobilized stationary phases which has arisen from the author's work on polysiloxane deactivation of fused silica capillaries. Althoug...
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POTENTIAL ENVIRONMENTAL IMPACT OF COMPOUNDING AND FABRICATING INDUSTRIES: A PRELIMINARY ASSESSMENT |
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The overall objectives of this research effort were to identify compounding and fabricating industries from a selected number of Standard Industrial Classification codes, and ident...
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PRECISION AND ACCURACY IN THE DETERMINATION OF ORGANICS IN WATER BY FUSED SILICA CAPILLARY COLUMN GAS CHROMOTOGRAPHY/MASS SPECTROMETRY AND PACKED COLUMN GAS CHROMATOGRAPHY/MASS SPECTROMETRY |
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Two general methods for the identification and measurement of organic compounds in water are compared. One method employs packed column chromatography and the other fused silica ca...
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PREPARATION AND APPLICATION OF HIGH PERFORMANCE SILICONE RUBBER MIXED MATRIX MEMBRANES FOR ETHANOL-WATER PERVAPORATION |
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Polydimethyl siloxane (PDMS) and zeolite incorporated mixed matrix materials are gaining importance in a variety of applications including membrane separation. PDMS based membrane...
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PREPARATION AND EVALUATION OF MODIFIED LIME AND SILICA-LIME SORBENTS FOR MERCURY VAPOR EMISSIONS CONTROL |
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The paper discusses current efforts to improve the uptake of mercury species by increasing active sites and adding oxidative species to the sorbent. (NOTE: Previous work showed th...
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PROBLEMS WITH A NAFION (TRADE NAME) MEMBRANE DRYER FOR DRYING CHROMATOGRAPHIC SAMPLES |
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A Nafion membrane dryer was used to dry samples of organic gases emitted by vegetation before chromatographic separation to reduce water-related retention time variations on a fuse...
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PROCEEDINGS FROM THE SEPTEMBER 1992 WORKSHOP: THE CHANGING RISK ASSESSMENTS FOR CHRYSTALLINE SILICA |
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There is no abstract available for this product. If further information is requested, please contact the Technical Information Staff at the number listed below....
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PULMONARY CHEMOKINE AND MUTAGENIC RESPONSES IN RATS AFTER SUBCHRONIC INHALATION OF AMORPHOUS AND CRYSTALLINE SILICA. (R827354C005) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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PULSED POSITIVE ION NEGATIVE ION CHEMICAL IONIZATION MASS SPECTROMETRIC APPLICATONS TO ENVIRONMENTAL AND HAZARDOUS WASTE ANALYSIS |
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The simultaneous acquisition of both positive ion and negative ion data under chemical ionization mass spectrometric conditions can aid in the confirmation of assignments made by e...
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Pd-N-Heterocyclic Carbene (NHC) Organic Silica: Synthesis and Application in Carbon-Carbon Coupling Reactions |
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The first Pd-N-heterocyclic carbene (NHC) complex in the form of organic silica was prepared using sol-gel method and its application in Heck and Suzuki reaction were demonstrated....
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Pitting Corrosion of Copper in Waters with High pH and Low Alkalinity |
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Localized or pitting corrosion of copper pipes used in household drinking-water plumbing is a problem for many water utilities and their customers. Extreme attack can lead to pinho...
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RAPID ANALYSIS OF CYANURIC ACID IN SWIMMING POOL WATERS BY HIGH PERFORMANCE LIQUID CHROMATOGRAPHY USING POROUS GRAPHITIC CARBON |
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An innovative approach is presented for reducing analysis times of cynuric acid in swimming pool waters by high performance liquid chromatography (HPLC). The HPLC method exploits ...
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RAPID ANALYSIS OF CYNANURIC ACID IN SWIMMING POOL WATERS BY HIGH PERFORMANCE LIQUID CHROMATOGRAPHY USING POROUS GRAPHITIC CARBON COLUMN |
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An innovative approach is presented for reducing analysis times of cyanuric acid in swimming pool waters by high performance liquid chromatography (HPLC). The HPLC method exploits...
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REGION, LANDSCAPE, AND SCALE EFFECTS ON LAKE SUPERIOR TRIBUTARY WATER QUALITY |
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In this study we apply an approach to third-order streams that we used previously to predict sensitivity of second-order streams to nonpoint source pollution based on the nonlinear...
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REGULATION OF CYTOKINE PRODUCTION IN HUMAN ALVEOLAR MACHROPHAGES AND AIRWAY EPITHELIAL CELLS IN RESPONSE TO AMBIENT AIR POLLUTION PARTICLES: FURTHER MECHANISTIC STUDIES |
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In order to better understand how ambient air particulate matter (PM) affect lung health, the two main airway cell types likely to interact with inhaled particles, alveolar macrop...
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REMEDIATION TECHNOLOGY EVALUATION AT THE GILT EDGE MINE, SOUTH DAKOTA |
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This document reports the findings of the Mine Waste Technology Program's Activity III, Project 29,The Remediation Technology Evaluation Project at the Gilt Edge Mine, S.D. This pr...
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RESPONSE OF THREE PALEO-PRIMARY PRODUCTION PROXY MEASURES TO DEVELOPMENT OF AN URBAN ESTUARY |
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In this study we present a novel comparison of three proxy indicators of paleoproductivity, pigments, biogenic silica (BSi), and cysts of autotrophic dinoflagellates measured in co...
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ROLE OF SURFACE COMPLEXED IRON IN OXIDANT GENERATION AND LUNG INFLAMMATION INDUCED BY SILICATES |
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The hypothesis was tested that silica and silicate dusts complex iron on their surface and that this iron increases 1) in vitro oxidant generation, and mediator release by alveolar...
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SATURATION MEASUREMENT OF IMMISCIBLE FLUIDS IN 2-D STATIC SYSTEMS: VALIDATION BY LIGHT TRANSMISSION VISUALIZATION (SAN FRANCISCO, CA) |
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This study is a part of an ongoing research project that aims at assessing the environmental benefits of DNAPL removal. The laboratory part of the research project is to examine th...
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SCREENING BIOAVAILABLE HYDROPHOBIC TOXICANTS IN SURFACE WATERS WITH SEMIPERMEABLE MEMBRANE DEVICES: ROLE OF INHERENT OLEIC ACID IN TOXICITY EVALUATIONS |
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Semipermeable membrane devices (SPMDs) were deployed for 4 weeks in two rivers in Lithuania, The SPMD dialysates were tested in the Microtox assay and, surprisingly, the sample fro...
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SEASONAL VARIATIONS IN NUTRIENT CONCENTRATIONS AND RIVER FLOW IN A NORTHWESTERN USA WATERSHED |
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Dissolved nutrient concentrations were measured in the Yaquina River, Oregon from 1998 through 2001 to determine nutrient loading from the watershed as part of a larger agency pro...
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SEASONAL VARIATIONS IN NUTRIENT CONCENTRATIONS AND RIVER FLOW IN A NORTHWESTERN USA WATERSHED |
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Dissolved nutrient concentrations were measured in the Yaquina River, Oregon from 1998 through 2001 to determine the watershed loading to Yaquina estuary. The effects of storms on...
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SEASONAL VARIATIONS IN RIVER DISCHARGE AND NUTRIENT EXPORT TO A NORTHEASTERN PACIFIC ESTUARY |
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Seasonal variations in dissolved nitrogen and silica loadings were related to seasonal variability in river discharge. Dissolved nutrient concentrations measured weekly at three st...
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SEASONAL VARIATIONS IN RIVER DISCHARGE AND NUTRIENT EXPORT TO A NORTHEASTERN PACIFIC ESTUARY (FINAL) |
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Seasonal variations in dissolved nitrogen and silica loadings were related to seasonal variability in river discharge. Dissolved nutrient concentrations measured weekly at three st...
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SEDIMENT MANGANESE AND BIOGENIC SILICA AS GEOCHEMICAL INDICATORS IN ESTUARINE SALT MARSHES OF COASTAL GEORGIA. (R825513C012) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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SELECTIVE RECOVERY OF ETHANOL FROM WATER BY PERVAPORATION: ZEOLITE-SILICONE RUBBER MIXED MATRIX MEMBRANES |
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The production of fuel-grade ethanol from renewable resources, such as biomass, is gaining attention due to the phase out of methyl t-butyl ether (MTBE) as a fuel oxygenate, nation...
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SELECTIVE WATER REMOVAL IN PURGE/GC (GAS CHROMATOGRAPH) ANALYSIS OF VOLATILE AROMATICS IN AQUEOUS SAMPLES |
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A gas chromatographic method for volatile aromatics in which an aqueous sample is purged directly to a cryogenically cooled, fused silica column uses a Nafion tube drier between th...
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SEPARATION OF TOXICOLOGICALLY RELEVANT ARSENICALS IN URINE USING A NEW SOLID PHASE EXTRACTION TECHNIQUE |
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Abstract - Metabolism and toxicity of arsenicals are critically influenced by the oxidation state of As. In human urine, inorganic and methylated arsenicals contain both As(III) an...
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SEPARATION PROPERTIES OF SURFACE MODIFIED SILICA SUPPORTED LIQUID MEMBRANES FOR DIVALENT METAL REMOVAL/RECOVERY |
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The synthesis and separation properties of a mesoporous silica supported liquid membrane (SLM) were studied. The membranes consisted of a silica layer, from dip-coated colloidal s...
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SHIPBOARD PHOSPHORUS, NITROGEN AND SILICA NUTRIENT LIMITATION ASSAYS USING IN-VIVO PHYTOPAM FLUORESCENCE IN THE NORTHERN GULF OF MEXICO |
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ABSTRACT FOR PRESENTATION...
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SILICA AND PM1648 MODIFY HUMAN ALVEOLAR MACROPHAGE ANTIGEN PRESENTING CELL ACTIVITY IN VITRO. (R826782) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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SILICA-ENHANCED SORBENTS FOR DRY INJECTION REMOVAL OF SO2 FROM FLUE GAS |
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The paper gives results of tests of novel silica-enhanced lime sorbents in a bench-scale sand-bed reactor for their potential for SO2 removal from flue gas. Reactor conditions were...
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SILICA-ENHANCED SORBENTS FOR DRY INJECTION REMOVAL OF SO2 FROM FLUE GAS (JOURNAL VERSION) |
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The paper gives results of tests of novel silica-enhanced lime sorbents in a bench-scale sand-bed reactor for their potential for SO2 removal from flue gas. Reactor conditions were...
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SIMPLE SAMPLE CLEAN UP PROCEDURE AND HIGH PERFORMANCE LIQUID CHROMATOGRAPHIC METHOD FOR THE ANALYSIS OF CYANURIC ACID IN HUMAN URINE |
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Cyanuric acide (CA) is widely used as a chlorine stabilizer in outdoor pools. No simple method exists for CA measurement in the urine of exposed swimmers. The high hydrophilicity ...
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SINGLE-LABORATORY EVALUATION OF METHOD 8060 -- PHTHALATE ESTERS |
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Method 8060 of EPA Manual SW 846 has been evaluated in a single laboratory. odifications made to the current method include expansion of the list of target compounds from 6 to 16; ...
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SINGLE-LABORATORY EVALUATION OF METHOD 8080 -ORGANOCHLORINE PESTICIDES AND PCBS (POLYCHLORINATED BIPHENYLS) |
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The design, execution and results of the improvement and single-laboratory evaluation of SW-846 Method 8080, 'Organochlorine Pesticides and PCBs', are described. In the study, the ...
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SINGLE-LABORATORY VALIDATION OF EPA METHOD 8150 FOR THE ANALYSIS OF CHLORINATED HERBICIDES IN HAZARDOUS WASTE |
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A single laboratory validated analytical protocol is described, which is applicable to the determination of the herbicides Dicamba, Silvex, 2,4-D, 2,4-DB, 2,4,5-T, Dinoseb, MCPP, a...
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SINGLE-STRAND SPIDER SILK TEMPLATING FOR THE FORMATION OF HIERARCHICALLY ORDERED MESOPOROUS SILICA HOLLOW FIBERS. (R828134) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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SOLVENT FREE CHEMICAL TRANSFORMATION USING MICROWAVE IRRADIATION |
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Microwave-expedited solvent-free synthetic processes will be described that involve the exposure of neat reactants to microwave (MW) irradiation in the presence of supported reagen...
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SOLVENT FREE OXIDATION OF ALCOHOLS USING IRON (III) NITRATE NONAHYDRATE |
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Oxidation of alcohols have been conducted with metal nitrate reagents on various mineral supports such as clay, silica and zeolite etc. To circumvent the limitations of these suppo...
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SOLVENT-FREE ACCELERATED ORGANIC SYNTHESES USING MICROWAVES |
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Abstract: A solvent-free approach for organic synthesis is described which involves microwave (MW) exposure of neat reactants (undiluted) either in presence of a catalyst or cataly...
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SOLVENT-FREE ALTERNATIVES TO ORGANIC SYNTHESES USING MICROWAVES |
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Microwave irradiation has been used for a variety of synthetic transformations wherein chemical reactions are accelerated because of selective adsorption of microwave (MW) energy b...
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SOLVENT-FREE APPROACH TO EXPEDITIOUS ORGANIC SYNTHESES USING MICROWAVE IRRADIATION |
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Microwave irradiation has been used for a variety of organic transformations wherein chemical reactions are accelerated because of selective adsorption of microwave (MW) energy by ...
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SOLVENT-FREE CHEMICAL TRANSFORMATIONS USING MICROWAVE IRRADIATION |
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Microwave-expedited solvent-free synthetic processes will be described that involve the exposure of neat reactants to microwave (MW) irradiation in the presence of supported reagen...
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SOLVENT-FREE CHEMICAL TRANSFORMATIONS USING MICROWAVE IRRADIATION. 32ND ACS CENTRAL REGIONAL MEETING, MAY 16-19, 2000, ABSTRACTS & PROGRAM, NORTHERN KENTUCKY CONVENTION CENTER, COVINGTON, KY. AMERICAN CHEMICAL SOCIETY, 1999, P. 121. |
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Microwave-expedited solvent-free synthetic processes will be described that involve the exposure of neat reactants to microwave (MW) irradiation in the presence of supported reagen...
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SOLVENT-FREE ORGANIC SYNTHESES USING MICROWAVES |
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The latest results on microwave-expedited solvent-free approach as applied to the assembly of organic molecules will be presented. The salient features of this expeditious methodol...
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SOLVENT-FREE ORGANIC SYNTHESES USING SUPPORTED REAGENTS AND MICROWAVES |
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The latest results on microwave-expedited solvent-free approach as applied to the assembly of organic molecules will be presented. The salient features of this expeditious methodo...
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SORPTION OF ACETAMINOPHEN, 17-&ALPHA;-ETHYNYLESTRADIOL, NALIDIXIC ACID, AND NORFLOXACIN TO SILICA, ALUMINA, AND A HYDROPHOBIC MEDIUM. (R829005) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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SORPTION PROPERTIES OF MODEL COMPOUNDS ON C18 ADSORBENTS |
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The bonded silica adsorbent Bondapak-C18 was evaluated for removing organic matter from secondary sewage effluents and from solutions of pure organic compounds. The adsorbent is hy...
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SORPTION, IMPORTANT IN STABILIZED/SOLIDIFIED WASTE FORMS |
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Sorption is one of the important fixation mechanisms of metals in stabilized/solidified waste forms. n the present work, the sorption-desorption processes active in cement-based wa...
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SOURCE ASSESSMENT: CRUSHED LIMESTONE, STATE OF THE ART |
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This report describes a study of atmospheric emissions from the crushed limestone industry. Crushed limestone plants emit particulates from drilling, blasting, transport on unpaved...
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SOURCE ASSESSMENT: CRUSHED SANDSTONE, QUARTZ, AND QUARTZITE, STATE-OF-THE-ART |
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This report describes a study of atmospheric emissions from the crushed sandstone, quartz, and quartzite industry. Particulates are emitted from drilling, blasting, loading and unl...
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SOURCE ASSESSMENT: CRUSHED STONE |
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This report describes a study of air emissions from crushed stone production. The potential environmental effect of the source is evaluated. Crushed stone production in 1972 was 1....
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SOURCE ASSESSMENT: HARVESTING OF GRAIN, STATE-OF-THE ART |
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The report describes a study of air pollutants generated by the harvesting of grain. Grain harvesting produces respirable particulates in the form of soil dust and plant tissue fra...
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SOURCE ASSESSMENT: TRANSPORT OF SAND AND GRAVEL |
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This report describes a study of atmospheric emissions from the transport of sand and gravel on unpaved roads. The potential environmental effect of this emission source was evalua...
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STABILITY OF MFI ZEOLITE-FILLED PDMS MEMBRANES DURING PERVAPORATIVE ETHANOL RECOVERY FROM AQUEOUS MIXTURES CONTAINING ACETIC ACID |
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Pervaporation is a potential process for recovering bioethanol produced from biomass fermentation. Fermentation broths contain ethanol, water, and a variety of other compounds, of...
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STABILITY OF MFI ZEOLITE-FILLED PDMS MEMBRANES DURING PERVAPORATIVE ETHANOL RECOVERY FROM AQUEOUS MIXTURES CONTAINING ACETIC ACID |
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Pervaporation is potentially a cost-effective means of recovering biofuels, such as ethanol, from biomass fermentation broths for small- to medium-scale applications (~2 - 20 milli...
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STIMULATION OF OXIDANT PRODUCTION IN ALVEOLAR MACROPHAGES BY POLLUTANT AND LATEX PARTICLES |
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Air pollutant dusts as well as chemically defined particles were examined for their activating effect on oxidant production (O2- and H2O2) in guinea pig alveolar macrophages (AM). ...
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STORM EVENTS: EFFECTS ON NUTRIENT DISTRIBUTIONS IN NORTHWESTERN USA ESTUARIES |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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STRONTIUM AS AN EFFICIENT PROMOTER FOR SUPPORTED PALLADIUM HYDROGENATION CATALYSTS |
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The effect of strontium promotion is studied for a series of supported palladium catalysts such as Pd/zeolite-β, Pd/Al2O3, Pd/SiO2, Pd/hydrota...
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STUDIES OF THE ADSORPTION OF ACETALDEHYDE, METHYL ACETATE, ETHYL ACETATE, AND METHYL TRIFLUOROACETATE ON SILICA. (R825370C056) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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SUPPORTED LIX-84 LIQUID MEMBRANES FOR METAL ION SEPARATION: A STUDY ON METAL ION SORPTION EQUILIBRIUM AND KINETICS |
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Supported 2-hydroxy-5-nonyl-acetophenone oxime (LIX-84) liquid membranes have potential applications for the removal (or recovery) of copper ions from waste streams. But, the stabi...
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SURFACE MODIFICATION OF SILICA- AND CELLULOSE-BASED MICROFILTRATION MEMBRANES WITH FUNCTIONAL POLYAMINO ACIDS FOR HEAVY METAL SORPTION |
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Functionalized membranes represent a field with multiple applications. Examination of specific metal-macromolecule interactions on these surfaces presents an excellent method for ...
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SURFACE REACTIONS OF OXIDES OF SULFUR |
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Surface reactions of several sulfur-containing molecules have been studied in order to understand the mechanism by which sulfate ions are formed on atmospheric aerosols. At 25C the...
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SUSPENDED AND BENTHIC SEDIMENT RELATIONSHIPS IN THE YAQUINA ESTUARY, OREGON: NUTRIENT PROCESSING |
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Measurements of nutrient loading and subsequent nutrient processing are fundamental for determining biogeochemical processes in rivers and estuaries. In Oregon coastal watersheds...
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SYNTHESIS AND CHARACTERIZATION OF LIX-84 NON-COVALENTLY BOUND SILICA SORBENTS FOR METAL-ION RECOVERY |
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Mesoporous silica particles were modified with LIX-84: (2-hydroxy-5-nonylacetophenome oxime). The LIX-84: was attached to the surface of silica via non-covelent forces. The effects...
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SYNTHESIS AND CORROSION RESISTANCE OF HIGH-SILICA ZEOLITE MTW, BEA, AND MFI COATINGS ON STEEL AND ALUMINUM. (R828134) |
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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoi...
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SYSTEMIC TRANSLOCATION OF PARTICULATE MATTER (PM)-ASSOCIATED METALS FOLLOWING A SINGLE INTRATRACHEAL (IT) INSTILLATION IN WKY RATS |
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Ambient PM contains transition metals with differing water solubilities. Epidemiological studies show a link between PM exposure and an increased risk of cardiovascular disease. Di...
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Synthesis of Pd-N-heterocyclic carbene Pd-catalyst and its application in MW-assisted Heck and Suzuki reaction |
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The first Pd-N-heterocyclic carbene (NHC) complex in the form of organic silica is prepared using sol-gel method and its application in Heck and Suzuki reactions are demonstrated. ...
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T.E. KLEINDIENST, E.W. CORSE, F.T. BLANCHARD, W.A. LONNEMAN |
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Carbonyl compounds are important constituents in urban and global atmospheres. n urban atmospheres these compounds frequently serve to initiate photochemical smog and certainly sus...
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TENAX-GC CARTRIDGE FOR INTERFACING CAPILLARY COLUMN GAS CHROMATOGRAPHY WITH ADSORPTION/THERMAL DESORPTION FOR DETERMINATION OF TRACE ORGANICS |
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An interface which allows the thermal desorption of large (about 5 cu m) Tenax-GC cartridges to fused silica capillary gas chromatography columns has been developed and tested. The...
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THE BIOGENIC SILICA SEDIMENT RECORD IN NEW BEDFORD, MA |
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There is no abstract available for this product. If further information is requested, please refer to the bibliographic citation and contact the person listed under Contact field....
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THE IMPACT OF PARTIAL DNAPL SOURCE ZONE REMEDIATION |
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Dense non-aqueous phase liquids (DNAPL) constitute a long-term source of groundwater contamination and a significant effort is usually required to treat these contaminated waters a...
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THERMAL MODULATION INTERFACE BETWEEN SUPERCRITICAL FLUID EXTRACTION AND SUPERCRITICAL FLUID CHROMATOGRAPHY |
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A thermal modulator that can act as an interface between supercritical fluid extraction and supercritical fluid chromatography was developed and tested. he modulator was made of a ...
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TRACE METAL RETENTION WHEN FIRING HAZARDOUS WASTE IN A FLUIDIZED-BED INCINERATOR |
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The report describes a bench-scale fluidized-bed incinerator that will capture trace metals on the bed material when firing hazardous waste. The design is based on limited tests at...
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USE OF CYANOPROPYL-BONDED HPLC COLUMN FOR BIOASSAY-DIRECTED FRACTIONATION OF ORGANIC EXTRACTS FROM INCINERATOR EMISSIONS |
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The present study has shown that cyanopropyl-(CN) bonded silica HPLC columns are applicable for the fractionation of mass and mutagenic activity of organic extracts from some incin...
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USE OF ELECTROSTATICALLY CHARGED FOG FOR CONTROL OF FUGITIVE DUST EMISSIONS |
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The report gives results of tests of the use of electrostatically charged fog to control a wide variety of industrial pollutants, ranging from silica flour to SO2 and fly ash. It h...
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USE OF WATERSHED CLASSIFICATION IN MONITORING FRAMEWORKS FOR THE WESTERN LAKE SUPERIOR BASIS |
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In this case study we predicted stream sensitivity to nonpoint source pollution based on the nonlinear responses of hydrologic regimes and associated loadings of nonpoint source po...
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UTILIZATION OF THE RABBIT ALVEOLAR MACROPHAGE AND CHINESE HAMSTER OVARY CELL FOR EVALUATION OF THE TOXICITY OF PARTICULATE MATERIALS. 1. MODEL COMPOUNDS AND METAL-COATED FLY ASH |
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Data are presented which detail the effects of model particulate compounds and fly ash particles on rabbit alveolar macrophage (RAM) and Chinese hamster ovary (CHO) cells. Silica, ...
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VOLATILE ORGANIC ANALYSIS BY DIRECT AQUEOUS INJECTION |
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Gas chromatographic environmental analysis by direct aqueous injection (DAI) was studied for 24 volatile organic analytes (VOAs). Internal standardization was used to determine the...
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WARE RIVER INTENSIVE WATERSHED STUDY - 1. NONPOINT SOURCE CONTRIBUTIONS |
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Runoff quantity and quality were monitored for row crop, residential and forested lands in the Ware basin for the period of October 1979 to July 1981. Loading rates have been calcu...
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WET EFFLUENT PARALLEL PLATE DIFFUSION DENUDER COUPLED CAPILLARY ION CHROMATOGRAPH FOR THE DETERMINATION OF ATMOSPHERIC TRACE GASES. (R825344) |
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We describe an inexpensive, compact parallel plate diffusion denuder coupled capillary IC system for the determination of soluble ionogenic atmospheric trace gases. The active samp...
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‘GREENER’ CHEMICAL SYNTHESES USING MICROWAVES |
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The diverse nature of chemical entities requires various green strategic pathways in our quest towards attaining sustainability. A solvent-free approach that involves microwave (MW...
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‘GREENER’ ORGANIC SYNTHESES UNDER NON-TRADITIONAL CONDITIONS |
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A solvent-free approach that involves microwave (MW) exposure of neat reactants (undiluted) catalyzed by the surfaces of less-expensive and recyclable mineral supports such as alum...
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‘Greener’ Chemical Syntheses Using Mechanochemical Mixing or Microwave and Ultrasound Irradiation |
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Various emerging ‘greener’ strategic pathways researched primarily in the author’s own laboratory are summarized. They include solvent-free mechanochemical methods and microwave (...
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