The oxidation of sulfite by Thiobacillus thiooxidans was studied at various pH values with changing concentrations of potassium sulfite. The optimal pH for sulfite oxidation by cells was a function of sulfite concentrations, rising with increasing substrate concentrations, while that by the cell extracts was ...
PubMed Central
The sulfite pulping industry primarily is characterized by the type of base chemical used in conjunction with sulfurous acid to effect delignification of gymnosperm woods. It further is characterized by the level of acidity during the digestion operation ...
National Technical Information Service (NTIS)
The report gives results of a study of organic acid degradation conjugated with sulfite oxidation under flue gas desulfurization (FGD) conditions. The oxidative degradation constant, k12, is defined as the ratio of organic acid degradation rate and sulfit...
... DEOXYRIBONUCLEIC ACIDS, GENES, HYPOTHESES, RIBONUCLEIC ACIDS, ABNORMALITIES, METHYLATION, CYTOSINE, SULFITES. ...
DTIC Science & Technology
... NITROGEN OXIDES, NITRIC ACID, THERMAL DEGRADATION, NITRATION, CHEMICAL DERIVATIVES, SIDE REACTIONS, SULFITES. ...
... CANCER, DEOXYRIBONUCLEIC ACIDS, CELLS(BIOLOGY), GROWTH( PHYSIOLOGY), PROSTATE GLAND, METHYLATION, SULFITES. ...
... ACIDS, SAMPLING, GENES, ASSAYING, IMMUNOCHEMISTRY, HISTOCHEMISTRY, METHYLATION, TOBACCO PLANTS, SULFITES. ...
... DURING POLARIZATION IN NITRIC ACID SOLUTIONS WITH ADDED SODIUM SULFITE, HYDROXYLAMINE SULFATE, AND HYDRAZINE ...
Experiments show that sulfite minerals inhibit carbonate precipitation at pH ~7, consistent with the presence of clays and absence of carbonates on early Mars. Subsequent oxidation of these sulfites yields acid and mixtures of sulfates and Fe-oxides.
NASA Astrophysics Data System (ADS)
Many chemicals are used to preserve, color and flavor foods and drugs. There have been numerous reports of adverse reactions, including urticaria, angioneurotic edema, asthma an anaphylaxis following the ingestion of food additives such as tartrazine, monosodium glutamate and benzoic acid. Recently the food and drug additives reaching medical awareness as a cause of ...
PubMed
The sulfite pulping industry primarily is characterized by the type of base chemical used in conjunction with sulfurous acid to effect delignification of gymnosperm woods. It further is characterized by the level of acidity during the digestion operation and by the extent of recovery of chemicals and waste heat. This report describes ...
Energy Citations Database
... PAPER, PHOTOGRAPHY, POTASSIUM COMPOUNDS, QUINONES, SODIUM COMPOUNDS, STABILITY, STORAGE, SULFITES, THIOUREA. ...
... FILM, VISCOSITY, OXYGEN, COLOR PHOTOGRAPHY, KETONES, FATTY ACIDS, AMIDES, GELATINS, ENZYMES, SULFITES, WATER, SULFUR ...
sulfides, sulfites, thiocyanates, and chlorite8 or hypcrchlorites. Pitting action will be accelerated in an acidic medium. Corrosive ...
NASA Website
... HUMANS, DEOXYRIBONUCLEIC ACIDS, CELLS(BIOLOGY), ADULTS, GROWTH(PHYSIOLOGY), PROSTATE GLAND, METHYLATION, SULFITES ...
... CONSTRUCTION), CHEMICALS, LIQUIDS, ADDITIVES, TAR, SHALE, LANDING FIELDS, ROADS, LIMESTONE, SULFITES, PHOSPHORIC ACIDS ...
... PROSTATE CANCER, UNITED STATES, GENES, RETINOIC ACIDS, CANCER SCREENING, SULFITES, STATISTICAL ANALYSIS, MORTALITY ...
The report gives results of a study of organic acid degradation conjugated with sulfite oxidation under flue gas desulfurization (FGD) conditions. The oxidative degradation constant, k12, is defined as the ratio of organic acid degradation rate and sulfite oxidation rate times th...
EPA Science Inventory
This study is on the operation and modification of a demonstration unit to remove sulfur dioxide, methanol, furfural, and acetic acid from its sulfite evaporator condensate. This unit consisted of a steam stripper, vent tank SO2 recovery, activated carbon...
This study is on the operation and modification of a demonstration unit to remove sulfur dioxide, methanol, furfural, and acetic acid from its sulfite evaporator condensate. This unit consisted of a steam stripper, vent tank SO2 recovery, activated carbon adsorption columns, and ...
...subcategory are defined as follows: (1) The calcium-, magnesium-, or sodium-based sulfite pulp segment consists of papergrade...paper are produced using an acidic cooking liquor of calcium, magnesium, or sodium sulfite, unless those mills are specialty...
Code of Federal Regulations, 2010
Sulfite oxidase (EC 1.8.3.1) from the plant Arabidopsis thaliana is the smallest eukaryotic molybdenum enzyme consisting of a molybdenum cofactor-binding domain but lacking the heme domain that is known from vertebrate sulfite oxidase. While vertebrate sulfite oxidase is a mitochondrial enzyme with cytochrome c as the physiological ...
Sulfite and related chemical such as sulfite salts and sulfur dioxide has been used as a preservative in food and drugs. This molecule has also been generated from the catabolism of sulfur-containing amino acids. Sulfite is a very reactive and potentially toxic molecule and has to be detoxified by the enzyme ...
Sulfite, which is continuously formed in the body during metabolism of sulfur-containing amino acids, is commonly used in preservatives. It has been shown that there are toxic effects of sulfite on many cellular components. The aim of this study was to investigate the possible toxic effects of sulfite on pyramidal ...
... Descriptors : *Patents, *Food preservation, Salads, Vegetables, Fresh foods, Cutting, Storage, Sulfites, Citric acid, Ascorbic acid, Preservatives ...
... acid and the reaction mechanisms from the acid sulfite pulping process. Consequently, the enhancement of cadmium sorption ... ...
NBII National Biological Information Infrastructure
Jun 16, 2011 ... Source: Technical note ; C8. Description: Keywords: Sulfite pulping, Digesters, Linings, Acids. View and Print this Publication (1.8MB) ...
Treesearch
Sulfites, which are commonly used as preservatives, are continuously formed in the body during the metabolism of sulfur-containing amino acids. Sulfite oxidase (SOX) is an essential enzyme in the pathway of the oxidative degradation of sulfite to sulfate protecting cells from sulfite toxicity. ...
Sodium sulfite is used routinely for removing traces of oxygen from the water in low- and moderate-pressure boilers. Sodium sulfite is unacceptable for use in higher pressure boilers because it will decompose, which will release acidic gases into the steam and increase corrosion of after-boiler components. However, even in ...
Ethane formation, as a measure of lipid peroxidation, was studied in spinach (Spinacia oleracea L.) chloroplasts exposed to sulfite. Ethane formation required sulfite and light, and occurred with concomitant oxidation of sulfite to sulfate. In the dark, both ethane formation and sulfite oxidation were inhibited. ...
Lactic acid bacteria isolated from an industrial-scale ethanol fermentation process were used to evaluate sulfite as a bacterial-contamination control agent in a cell-recycled continuous ethanol fermentation process. The viabilities of bacteria were decreased by sulfite at concentrations of 100 to 400 mg liter-1, while ...
An efficient electrocatalytic biosensor for sulfite detection was developed by co-immobilizing sulfite oxidase and cytochrome c with polyaniline sulfonic acid in a layer-by-layer assembly. QCM, UV-Vis spectroscopy and cyclic voltammetry revealed increasing loading of electrochemically active protein with the formation of multilayers. ...
Sulfite, produced for instance during amino acid metabolism, is a very reactive and toxic compound. Various detoxification mechanisms exist, but sulfite oxidoreductases (SORs) are one of the major actors in sulfite remediation in bacteria and animals. Here we describe the existence of an operon in the extreme ...
Includes study of precipitation of copper upon metallic iron and of limestone, sulfites, and sulfides as precipitants. Last three were unsuccessful.
... Sulfates, Aluminum, Chromium, Nickel, Cobalt, Yttrium, Manganese, Acids, Protective equipment, Sodium sulfates, Corrosion, Salt water, Sulfites. ...
... Title : Corrosion of Some Chromium-Nickel Steels and Alloys in Sulfuric Acid Solutions of Sodium Sulfite,. Descriptive Note : Journal Article,. ...
A 24-year-old woman who visited our hospital because of urticaria had a bronchial asthma attack about 5 min. after receiving Stronger Neo-Minophagen C (SNMC) intravenously. A skin test for SNMC and its components (glycyrrhizin, L-cystein, aminoacetic acid, and sodium sulfite) was positive for SNMC and borderline for sodium sulfite ...
Problems of industrial air and water pollution in Finland are outlined with regard to the removal and recovery of sulfur dioxide from flue gases from industrial and power plants. Sulfur dioxide, generated in large quantities by thermal power plants and sulfuric acid production plants, is absorbed in sodium sulfite solution in the Wellman-Lord process on ...
Dissolved oxygen in water, even as little as 1 ppM, is still quite effective in producing corrosion and formation of deposits which will cause premature failure of the equipment. Certain chemicals are known as oxygen scavengers. There are many types of these compounds, but one that is quite extensively used is sodium sulfite in combination with a catalyst. The sodium ...
A method for preventing the accumulation of an alkali sulfate produced as a by-product in the system for removing sulfur dioxide from exhaust gases containing sulfur dioxide is disclosed , the system comprising bringing the exhaust gas into contact with an aqueous solution containing an alkali sulfite to absorb sulfur dioxide into the solution and to convert the absorbed ...
The products of sulfonation of lignin, the lignosulfonates, are multitonnage waste products from the sulfite digestion process for cellulose in which under the action of a boiling sulfite solution on wood, the polymeric lignin macromolecule is broken down with the formation of various water soluble sulfonated structural units. The authors have developed a ...
Sulfite oxidase catalyzes the terminal reaction in the degradation of sulfur amino acids. Genetic deficiency of sulfite oxidase results in neurological abnormalities and often leads to death at an early age. The mutation in the sulfite oxidase gene responsible for sulfite oxidase deficiency in ...
A method is described for removing sulfur dioxide in the form of calcium sulfite from a sulfur dioxide-containing combustion exhaust gas, comprising the steps of: feeding a portion of the combustion exhaust gas to a sulfuric acid solution to produce sulfurous acid in the solution and a gas exhaust and then oxidizing the sulfurous ...
Inhibitor compositions are described which prevent oxidation of iron by aqueous sulfite solutions. The inhibitor is an organic phosphonate containing at least 2 phosphonic acid groups per molecule. Also provided is a method of reducing the oxidation rate of aqueous sulfite solutions caused by oxygen in the atmosphere and a method of ...
A waste flue gas desulfurizing method is described in which a waste flue gas containing sulfurous acid gas is contacted directly with sea-water, whereby the sulfurous acid gas is absorbed in the sea-water and concurrently sulfites are formed in the sea-water by the reaction between the sulfurous acid ions and metal ...
A natural isolate, designated BSA56, which was originally selected for growth with benzene sulfonic acid as sole carbon and energy source, was identified as a strain of Pseudomonas maltophila. Strain BSA56 grew on a wide range of aromatic sulfonic acids and was shown to release sulfite from benzene sulfonic acid ...
A simple and convenient method for colorimetric determination of sulfite in foods based on its conversion to formaldehyde with sulfite oxidase and catalase was developed. Sulfite in a sample was extracted with water and then diluted with methanol. One mL of sample solution containing about 5-10 micrograms of ...
Sulfite liquor, obtained during boiling with acid and containing not only a calcium, but also a mixed calcium-sodium base, after preliminary concentration by evaporation is a supersaturated solution of calcium sulfate. Independently of the degree of repla...
In recent years, the influences of acid rain such as the acidification of lake water, on bio-system by the heavy metals from effluent of soils with acid rain and also on the structural materials of buildings are seriously discussed. Sulfur and nitrogen that are contained in fossil fuels are released into the atmosphere by the fuel combustion as their ...
The continuous bioprocessing of simulated steam-stripped sulfite pulp mill evaporator condensates using Candida utilis to produce single cell protein has been studied. At 32 degrees C, processing can be conducted at space velocities of up to 0.43 hr/sup -1/ with over 90% removal of acetic acid present at an initial concentration of 2 g/liter. (Refs. 16).
Plant NiR (nitrite reductase) and SiR (sulfite reductase) have common structural and functional features. Both enzymes are generally distinguished in terms of substrate specificity for nitrite and sulfite. The genome of Cyanidioschyzon merolae, a unicellular red alga living in acidic hot springs, encodes two SiR homologues, namely ...
The oxidation of calcium sulfate in a gas-solid-liquid system has been studied in a continuous stirred reactor. This oxidation reaction is of interest since it occurs in limestone scrubber systems for flue gas desulfurization. The overall oxidation process consists of oxygen absorption, dissolution of calcium sulfite, and liquid phase reaction, but the emphasis in this work ...
The purpose of this report was to study the equilibrium conditions for the interaction between sodium sulfate and the calcium salts of various carboxylic acids. The experimental data presented can be recommended for engineering calculations for the regeneration of spent absorbent containing sodium sulfate or a mixture of sodium sulfate, sulfite, phosphate, ...
At the Baku factory of residential air conditioning systems both preliminary and final pickling of copper tubing is carried out in a solution of sulfuric and nitric acids. The authors of this study, in seeking an inhibitor to control this process, evaluate the protective properties of an inhibitor based on a concentrated sulfite-yeast fermenting mixture ...
This report gives results of a study of organic acid-degradation conjugated with sulfite oxidation under flue-gas desulfurization (FGD) conditions. The oxidative degradation constant, k12, is defined as the ratio of organic-acid degradation rate and sulfite oxidation-rate times the ratio of the concentrations of ...
Organic acid degradation conjugated with sulfite oxidation has been studied under flue gas desulfurization (FGD) conditions. The oxidative degradation constant k/sub 12/ is defined as the ratio of organic acid degradation rate and sulfite oxidation rate times the ratio of the concentration of dissolved S(IV) and ...
The determination of hydrogen sulfide in effluents from coal-fired furnaces and incinerators is complicated by the presence of sulfur oxides (which form acids). Organic compounds also may interfere with or prevent the formation of the cadmium sulfide prec...
Low molecular weight lignin sulfonates have been separated in purified form and characterized by physicochemical and chemical methods. Their structure and reactions have been evaluated. Lignin sulfonates from the spent sulfite liquor of a mild acid bisulf...
One-step photographic processing, using a mixture of amidol or metol, hydroquinone, sodium sulfite, sodium carboxymethyl cellulose, hyposulfite, and sodium hydroxide, can be accelerated by adding 1-phenyl-5-mercaptotetrazole, ascorbic acid, and cystine or...
In a process for preparing calcium sulfate by oxidizing the system made up of calcium sulfite and water, the oxidation reaction is much accelerated by irradiation with an ionizing radiation, such as electron beam, $gamma$, or x radiation. When the system is kept in acidic state, the reaction is further accelerated. (auth)
The thermochemical cycles which have been most extensively developed all involve the thermal decomposition of sulfuric acid which is corrosive. Metal sulfate cycles have been studied as a means of circumventing handling corrosive mixtures at high temperat...
A lubricant for a glass fiber based on polyvinyl alcohol cross-linked with oxalic acid, a water-repelling agent, and emulsifier to be used in a reinforced plastic is distinguished in the Russian patent by the fact that sulfited nitrolignin is introduced i...
The report gives results of a study to extend potential applications of MgO flue gas desulfurization processes by allowing the sulfur to be recovered as elemental sulfur as well as sulfuric acid. The study considered the feasibility of combining the exothermic SO2 reduction react...
Pretreatment and nutrient additions are required for reliable and acceptable ethanol production from acid-catalyzed hemicellulosic hardwood hydrolyzates by the yeast Pachysolen tannophilus. Neutralization of heated hydrolyzate, sulfite additions, and over...
An improved method for recovering sulfur from flue gas which contains sulfur dioxide formed from burning sulfur containing fuels is disclosed. The method first involves the reduction burning of auxilary fuel in the presence of sodium sulfite to convert it to smelt containing sodium sulfide and sodium carbonate. The smelt is dissolved, and the solution reacted with carbon ...
The structural genes for dissimilatory sulfite reductase (desulfoviridin) from Desulfovibrio vulgaris Hilden-borough were cloned as a 7.2-kbp SacII DNA fragment. Nucleotide sequencing indicated the presence of a third gene, encoding a protein of only 78 amino acids, immediately downstream from the genes for the alpha and beta subunits (dsvA and dsvB). We ...
Effects of respirable aerosols of sulfuric acid, ammonium sulfate, sodium sulfite, and ammonium persulfate on lungs of rats are reviewed. The literature regarding interactions between ozone or nitrogen dioxide and acidic aerosols (ammonium sulfate, sulfuric acid) is discussed. An unexpected interaction between ...
This study aimed to investigate the effects of hypercholesterolemia on visual evoked potentials (VEPs) and sulfite additional effects. Rats were assigned as follows: control (C), sulfite (S), hypercholesterolemia (H), vitamin E (E), sulfite + vitamin E (SE), hypercholesterolemia + sulfite (HS), hypercholesterolemia ...
Recent epidemiological and animal toxicological studies indicate that reactions between SO/sup 2/ and metal containing aerosols result in the formation of respiratory irritants. These studies point out the importance of understanding in detail the chemical species formed by such interactions. Using a combination of thermometric, ESCA, and PIXE analysis techniques, it has been demonstrated that ...
The hemoprotein component of Salmonella typhimurium sulfite reductase (NADPH) (EC 1.8.1.2) was purified to homogeneity from cysJ266, a mutant strain lacking sulfite reductase flavoprotein. The siroheme- and Fe4S4-containing enzyme was isolated as a monomeric 63-kDa polypeptide and consisted of a mixture of unligated enzyme and a complex with ...
sulfites. (50) The reaction of the cyclic sulfite with thionyl chloride ..... sulfites to polyethers. Since the hexafluoropentamethylenesulfite can be ...
In this study, the inhibitory effects of antibrowning agents on browning and the formation of intermediates such as 3-deoxyglucosone (3-DG) and hydroxymethylfurfural (HMF) were evaluated with a glucose-glutamic acid model for soybean paste. The initial antibrowning capacity was measured in the following order: pentasodium tripolyphosphate < citric acid ...
Sulfite oxidase is a mitochondrial enzyme encoded by the SUOX gene and essential for the detoxification of sulfite which results mainly from the catabolism of sulfur-containing amino acids. Decreased activity of this enzyme can either be due to mutations in the SUOX gene or secondary to defects in the synthesis of its cofactor, the ...
A pervaporation-flow injection (PFI) method was developed for the determination of sulfite in selected food samples using a copper hexacyanoferrate-carbon nanotube (CuHCF-CNT)-modified carbon paste electrode. The electrochemical behavior of the modified electrode was observed using cyclic voltammetry in comparison to a CuHCF-modified carbon paste electrode and a bare carbon ...
Thermochemical hydrogen cycles involving metal sulfates offer an alternative to sulfuric acid which is corrosion and has high energy requirements for drying prior to its thermal decomposition. The formation of such metal sulfates in conjunction with a low-temperature hydrogen formation step is discussed. The following reaction was studied: MgSO/sub 3/(c) + MgO(c) + I/sub 2/ ...
It is noted that thermochemical hydrogen cycles involving metal sulfates offer an alternative to sulfuric acid which is corrosive and has high energy requirements for drying prior to its thermal decomposition. The formation of such metal sulfates in conjunction with a low temperature hydrogen formation step is discussed. The following reaction was studied: MgSO3(c) + MgO(c) + ...
The emission produced by sulfite in its oxidation by periodate in acidic solution in the presence of Ru(phen){sub 3}{sup 2+} is used to determine 1.0 {times} 10{sup {minus}7} to 1.5 {times} 10{sup {minus}4} mol/L sulfite. The limit of detection is 7 {times} 10{sup {minus}10} mol/L and the relative standard deviation is 2.3% for a 4 ...
Sulfur dioxide (SO2) or sulfites are the most common preservatives used in winemaking. The level of total SO2 is subject to regulation. Currently, the regulatory determination of total SO2 (including sulfites) is done by the optimized Monier-Williams (OMW) method, which includes time-consuming distillation and titration steps. This paper describes the ...
Steels 12Kh18N1OT and 10Kh17N13M3T and alloys 06KhN28MDT and 46KhNM were studied in sulfuric acid solutions containing sodium sulfite and sulfur dioxide to determine the effects of different concentrations of the corrosive constituents on the anodic and cathodic active and passive corrosion behavior of the metals. Polarization curves were obtained with a ...
Highlights of progress during the period are summarized under the following headings: characterization of xylose transport in Schizosaccharomyces pombe; growth of s. pombe on xylulose; cloning of xylose isomerase gene from Rhotorula glutenis and Escherichia coli; Radioassay of xylulokinase; and growth of s. pombe in spent sulfite liquor. The objective of the program is to ...
Sulfite oxidizing enzymes (SOEs) are molybdenum cofactor-dependent enzymes that are found in plants, animals, and bacteria. Sulfite oxidase (SO) is found in animals and plants, while sulfite dehydrogenase (SDH) is found in bacteria. In animals, SO catalyzes the oxidation of toxic sulfite to sulfate as the final ...
Sulfite oxidizing enzymes (SOEs) are molybdenum cofactor dependent enzymes that are found in plants, animals and bacteria. Sulfite oxidase (SO) is found in animals and plants, while sulfite dehydrogenase (SDH) is found in bacteria. In animals, SO catalyzes the oxidation of toxic sulfite to sulfate as the final step ...
Sulfite determination plays an important role since it is used in some food stuff as protecting agent. The objective of this study was to develop a new and simple method for the determination of sulfite so that it can be used in routine food analysis. A differential pulse polarographic (DPP) method has been used for this purpose since the results obtained ...
Rapid separation and determination of mixtures of L-ascorbic acid, nitrite, sulfite, oxalate, iodide and thiosulfate by conventional ion chromatography is often difficult due to incomplete separation of L-ascorbic acid and nitrite from the water peak when using eluents giving short elution times for iodide and thiosulfate. Separation ...
A new process for separating and recovering volatile bases and volatile acids from their salts or their dissociation products in the liquid or gaseous state is described. A process is given for recovering ammonia and sulfur dioxide or hydrogen sulfide from, respectively, ammonium sulfites or sulfides. This process is conducted in 2 steps. In a first step, ...
Beside yeasts, lactic acid bacteria (LAB) are the most abundant microbes in must during vinification. Whereas Oenococcos oeni is commercially used as a starter culture for the biological acid reduction in wines, other species are responsible for different types of wine spoilage. Members of the genera Pediococcus, Weissella, Leuconostoc, and Lactobacillus ...
In the radiolysis products of aerated and deaerated solutions of the 2-aminoethanethiosulfuric acid the authors have identified cystamine monoxide, cystamine, taurine, mercamine, the sulfate ion, the sulfite ion, and the dithionate ion. The yields of these products under different conditions have been determined. Results indicated that the sulfate ion is ...
The report gives results of the measurement of the adipic acid degradation rate in a bench-scale flue gas desulfurization (FGD) system, designed to simulate many of the important aspects of full-scale FGD systems. Results show that the adipic acid degradation rate depends on the ...
The performance of two pretreatment methods, Sulfite Pretreatment to Overcome Recalcitrance of Lignocellulose (SPORL) and Dilute Acid (DA), was compared in pretreating softwood (spruce) for fuel ethanol production under the same conditions of temperature (180°C), time (30 min), sulfuric acid loading...
Technology Transfer Automated Retrieval System (TEKTRAN)
... to treat asthma and allergic reactions. Sulfite containing ingredients to look for on food labels include: Sulfur ...
MedlinePLUS
... Title : EFFECT OF CHLORINE, NITRATE, AND SULFITE IONS ON THE ELECTROCHEMICAL AND CORROSION BEHAVIOR OF STAINLESS ...
DETERMINATION of SULFITES in SHRIMP Shrimp melanosis is a harmless but objectionable surface discoloration caused by polyphenoloxidase enzyme systems...
Pretreatment and nutrient additions are required for reliable and acceptable ethanol production from acid-catalyzed hemicellulosic hardwood hydrolyzates by the yeast Pachysolen tannophilus. Neutralization of heated hydrolyzate, sulfite additions, and overliming (raising the pH to 10 with Ca(OH)/sub 2/ and then lowering the pH for conversion) alone and in ...
The effect of 0 to 0.15 M sodium chloride, sulfate, and sulfite, and potassium acid phosphate on the extraction of 0.1 to 4.1% 1-butanol from aqueous solutions (derived from fermentation of wood pulp liquors) at 25, 40, and 55 C was evaluated using a factorial experiment. The changes in distribution coefficient were small, with mild increases occurring ...
Acid fog is complex and contains multiple stimuli that may be capable of inducing bronchoconstriction. These stimuli include sulfuric and niric acids, the principal inorganic acids present; sulfites, formed in the atmosphere as a reaction product of sulfur dioxide and water droplets; fog water itself, a hypoosmolar ...
Acid fog is complex and contains multiple stimuli that may be capable of inducing bronchoconstriction. These stimuli include sulfuric and nitric acids, the principal inorganic acids present; sulfites, formed in the atmosphere as a reaction product of sulfur dioxide and water droplets; fog water itself, a ...
A spectrophotometric method for sulfur dioxide determination was explored on the basis of its complexation with TNP-amino acid derivatives forming an orange colored 1:1 complex with an increase in absorbance at 420 nm. TNP-glycine, TNP-threonine, TNP-serine and TNP-histidine (TNP-(2,4,6-trinitrophenyl-)) were investigated. The color development was instantaneous and the ...
Sulfite dehydrogenases (SDHs) catalyze the oxidation and detoxification of sulfite to sulfate, a reaction critical to all forms of life. Sulfite-oxidizing enzymes contain three conserved active site amino acids (Arg-55, His-57, and Tyr-236) that are crucial for catalytic competency. Here we have studied the kinetic ...
DOE Information Bridge
S>An improved photographic developer is presented having very high energy development fine grain characteristics and a long shelf life. These characteristics are obtained by the use of aminoacetic acid in the developer, the other constituents of which are: sodium sulfite, hydroquinone, sodiunn borate, boric acid and ...
Cancell is a trademarked name of a liquid mixture long promoted as a treatment for people with cancer and other diseases (see Question 1). The U.S. Food and Drug Administration (FDA) has listed the ingredients of Cancell as the chemicals inositol, nitric acid, sodium sulfite, potassium hydroxide, sulfuric acid, and catechol (see ...
Cancer.gov
A review on the use of bile acids as hosts for molecular recognition and enantioresolution is presented. The optical resolution of different classes of organic derivatives, i.e., lactones, aliphatic alcohols, sulfoxides, epoxides, ketones, cyclic amides, cyclic carbonates, and sulfites, may be obtained by host-guest enantioselective inclusion complexation. ...
