The electronic absorption spectra and electronic structure of yttrium quinaldinates with an island and polymer structure were studied. A comparative analysis of the energies of the singlet and triplet excited states, the total energies of complex compounds in the ground state, and Mulliken's bond overlap populations was performed by the TD-DFT method with the B3LYP density ...

Arthrobacter nitroguajacolicus R�61a, which utilizes quinaldine as sole source of carbon and energy, was shown to contain a conjugative linear plasmid of approximately 110 kb, named pAL1. It exhibits similarities with other linear plasmids from Actinomycetales in that it has proteins covalently attached to its 5' ends. Southern hybridization with probes for the genes ...

Crystal structures of three small molecular scaffolds based on quinoline, 2-methylquinoline-5,8-dione, 5-hydroxy-quinaldine-6-carboxylic acid and 8-hydroxy-quinaldine-7-carboxylic acid, were characterised. 5-Hydroxy-quinaldine-6-carboxylic acid was co-crystallized with cobalt(II) chloride to form a model of divalent metal cation-ligand ...

Studies of hydrogen exchange in alpha -picoline, quinaldine methyl groups and their n-oxides showed that hydrogen mobility increases from alpha - picoline to quinaldine and from heterocycles to n-oxides. Triethylamine and piperidine do not catalyze the reaction, while alcoholate ions have strong catalytic effects. The kinetic isotopic effect for ...

... 1 m2 randomly selected quadrats using quinaldine diluted 1:9 in 2-propanol. All fish within the 1-m quadrat were anesthetized and collected in mesh ... ...

Contents: Synthesis of 1-(Beta-(pyridyl)-ethyl)-isoquinolines and 1-(Beta-piperidyl)-ethyl)-1,2,3,4-tetrahydroisoquinolines; Syntheses in the quinaldine group; Studies in pyrazole derivatives; Investigation of antiserotonin compounds in the group of quino...

... use chemicals such as chlorinated lime, quinaldine with potassium ... fishes are caught with cyanide (Hingco and Rivera 1991) and it is reported ... ...

Contents: Synthesis and transformations of 2-ethoxycarbonylmethyl-4-hydroxyquinezoline and some of its derivatives; Syntheses in the quinaldine group. II. aminopolymethyleneamides of chloro-4-hydroxyquinaldic acids; Synthesis of 4-(tetra-O-acetyl--D-gluco...

The nucleotide sequence of the linear catabolic plasmid pAL1 from the 2-methylquinoline (quinaldine)-degrading strain Arthrobacter nitroguajacolicus R�61a comprises 112,992 bp. A total of 103 open reading frames (ORFs) were identified on pAL1, 49 of which had no annotatable function. The ORFs were assigned to the following functional groups: (i) catabolism of ...

The nucleotide sequence of the linear catabolic plasmid pAL1 from the 2-methylquinoline (quinaldine)-degrading strain Arthrobacter nitroguajacolicus R�61a comprises 112,992 bp. A total of 103 open reading frames (ORFs) were identified on pAL1, 49 of which had no annotatable function. The ORFs were assigned to the following functional groups: (i) catabolism of ...

A genetic analysis of the anthranilate pathway of quinaldine degradation was performed. A 23-kb region of DNA from Arthrobacter ilicis R�61a was cloned into the cosmid pVK100. Although Escherichia coli clones containing the recombinant cosmid did not transform quinaldine, cosmids harboring the 23-kb region, or a 10.8-kb stretch of this region, conferred ...

An occupational allergic contact dermatitis caused by a yellow quinophthalone dye which is used for colored smokes in detonators was the reason for further studies of this case of allergy. Solvent Yellow 33 (German: Rauchgelb) belongs to the groups of quinaldine dyes which are produced by condensing quinaldine and phthalic anhydride. The dye itself is a ...

Anaesthesia may depress the immune system in mammals, but there is no available information on this topic in fish. In the present work, four anaesthetics that are used in aquaculture, MS222 (0 19 mM), benzocaine (0.21 mM), 2-phenoxyethanol (16 mM) and quinaldine sulphate (0.083 mM), were tested in order to observe their effects on the gilthead seabream (Sparus aurata L.) ...

Zinc carrier is added to an aliquot of effluent. Radiolead is removed by coprecipitation with strontium sulfate before the zinc is extracted by dithizone supported on a column of cellulose acetate chips. The zinc is eluted with hydrochloric acid and after three scavenging precipitations to remove interfering nuclides it is recovered as zinc quinaldinate and gamma ...

Biocatalytic hydrocarbon oxyfunctionalizations are typically accomplished using oxygenases in living bacteria as biocatalysts. These processes are often limited by either oxygen mass transfer, cofactor regeneration, and/or enzyme instabilities due to the formation of reactive oxygen species. Here, we discuss an alternative approach based on molybdenum (Mo)-containing dehydrogenases, which produce, ...

Three quinoline amines, 2-aminomethylquinoline, 2-hydroxymethylquinoline and quinaldine (2-methylquinoline), are identified in greyhound urine. These amines can interfere in the analysis of greyhound material for basic drugs. This is a special problem in ultraviolet spectrometry since their extinction coefficients are high. Reference analytical data for these quinoline amines ...

We measured the IR spectra and in some cases the electronic spectra of 29 quinoline analogs of chalcones, 1-(naphthy1-2)-3-phenylpropenone-1, 2-acetylquinoline, and quinaldine aldehyde. It was found that quinoline-2 plays the role of an electron acceptor in the systems studied. Some remarks are made concerning the dependence of the absorption curves of the compounds on their ...

It was established by ESR and the presence of oxygen atoms at the ..cap alpha.. position to the radical center is the reason for the enhanced reactivity of the alkyl radicals in reaction with protonated bases. The yields of the alkylation products depend on the ratio of the concentrations of the Fe/sup 3/..mu.. and Fe/sup 2 +/ ions in the reaction mixture.

stress and reduce the cortisol response. Previous studies have concentrated on cold- and warmwater of stress. Most cortisol studies have focused on coldwater food fish, primarily salmonids, with little cortisol levels; however, this was not taken into consideration for this pre- liminary study. Discussion

2004 � www.jn.org #12;catfish (Ictalurus punctatus) are anesthetized after immersion in 0.0004% tricaine responses to tricaine methanesulfonate, quinaldine and clove oil in anesthetized channel catfish Ictalurus punctatus. Aquaculture 218: 1�9, 2002. Spath M and Schweickert W. The effect of metacaine (MS-222

Contents: Synthesis of some N-beta-amino-alpha-keto)-ethyl)-azacyclooctanes; Syntheses in the quinaldine group. III. 4-hydroxy-6-chloroquinaldic acid omega-aminopolymethyleneamides; Synthesis of some 5-nitrofurfural derivatives; N-oxides of 2-pyrazinecarb...

The interaction of pinacyanol (PNC) and quinaldine red (QR) cyanine dye cations with single-and doubly charged phenol red (PR) anions in aqueous solution was investigated in detail. In spite of fundamentally different geometries, noticeable interaction between the counterions leads to the formation of ion associates. The energies of PNC, QR, PR, and their associates were ...

[reaction: see text] Condensation of squaric acid with quinaldinium salts containing electron-donating substituents gave only the semisquaraines. However, with salts possessing electronegative and electron-withdrawing groups, the squaraine dyes were isolated in quantitative yields. The semisquaraines formed undergo condensation with highly nucleophilic salts yielding the unsymmetrical squaraine ...

[reaction: see text] Synthesis of new quinaldine-based squaraine dyes linked to cellular recognition elements that exhibit near-infrared absorption (>740 nm) are described. Both product analysis and theoretical calculations substantiate the interesting electronic effects of various substituents in the dye formation reaction. These results are useful in the synthesis of ...

The tendency of anions of sulphophthaleine dyes to heteroassociation was studied in aqueous solutions of phenol red, bromophenol blue, bromocresol green, bromocresol purple, and bromothymol blue. It was spectrophotometrically determined that single-(Han-) and double-charged anions (An2-) of sul-phophthaleines can form stable heteroassociates of composition Ct+ � HAn- and (Ct+)2 � An2- with ...

The tendency of anions of sulfophthaleine dyes to heteroassociation was studied in aqueous solutions of phenol red, cresol red, thymol blue, and non-substituted phenol red. It was spectrophotometrically determined that single (HAn-) and doubly charged anions (An2-) of sulfophthaleines can form stable heteroassociates of the composition Ct+ � HAn- and (Ct+)2 � An2- with cations (Ct+) of ...

Type A monoamine oxidase (MAO-A) in human placental mitochondria was competitively inhibited by naturally occurring substances, quinoline and quinaldine, using kynuramine as substrate. Quinoline had a higher affinity for MAO than kynuramine. MAO-A in human brain synaptosomal mitochondria was also competitively inhibited by quinoline, while type B MAO (MAO-B) was reversibly and ...

We present results from an investigation of the binding ability of the main transport proteins (albumin, lipoproteins, and ?-1-acid glycoprotein) of blood plasma from patients at different stages of liver cirrhosis by the fluorescent probe method. We used the hydrophobic fluorescent probes anionic 8-anilinonaphthalene-1-sulfonate, which interacts in blood plasma mainly with albumin; cationic ...

A new chelating resin has been synthesized by introducing a quinaldinic acid amide group into styrene-divinyl benzene (8%) copolymer beads. The resin is stable in fairly strong acids or alkali and has been characterized by elemental analysis for nitrogen and from i.r. spectra. The water regain value is 0.37g/g. The sorption patterns of Na(I), K(I), Ca(II), Mg(II), Pb(II), ...

Efforts to restore anadromous striped bass (Morone saxatilis) populations by the U.S. Fish and Wildlife Service and other agencies over the past 20 years have concentrated on hatchery culture to supplement dwindling natural reproduction. Adult fish captured for artificial spawning are stressed by handling and crowding in rearing ponds and are often exposed to therapeutants, anesthetics, ...

Coumarin-type anticoagulants, warfarin, phenprocoumon and acenocoumarol, were tested for their stereoselective binding to the human orosomucoid (ORM; AGP) genetic variants ORM 1 and ORM 2. Direct binding studies with racemic ligands were carried out by the ultrafiltration method; the concentrations of free enantiomers were determined by capillary electrophoresis. The binding of pure enantiomers ...

Miniaturization of high-throughput screening (HTS) assays has several obvious advantages, including increased throughput and lower cost by reduction in reagent consumption. Although absorbance assays are widely used in research laboratories, their application for HTS in a low-volume format has been met with mixed success because they are difficult to miniaturize. Challenges for the miniaturization ...

Residue concentrations of drugs that are administered to fish by bath immersion are related primarily to passage of the drugs across the gills. The elimination of these chemicals by fish can be mediated by biotransformation, but the route of elimination depends on physical characteristics of the chemicals or on their biotransformation products. Uptake of the anesthetics tricaine methanesulfonate, ...

pAL1 of the actinomycete Arthrobacter nitroguajacolicus R�61a, a 113-kb catabolic linear megaplasmid of the invertron-type, enables its host to utilize quinaldine (or 4-hydroxyquinaldine) as the sole carbon and energy source. Comparative Southern hybridization and quantitative real-time PCR analyses revealed copy numbers of two for cells grown in minimal medium supplemented ...

Presently there are no legally registered fish anesthetics that allow for the release of fish or use of the fish for food soon after they have been anesthetized. MS-222 (tricaine), the only anesthetic registered for use on fish in the United States, cannot be used within 21 d of harvesting the fish for food. As the start in a search for an anesthetic that can be used with little or no withdrawal ...

We report a novel fluorometric end-point assay for the determination of 1-deoxy-d-xylulose 5-phosphate synthase (DXS) activity based on the reaction of 1-deoxy-D-xylulose 5-phosphate (DX5P) with 3,5-diaminobenzoic acid in an acidic medium to form a highly fluorescent quinaldine derivative. The assay was validated in three ways: (a) for a fixed amount of DXS in the reaction ...

The stoichiometric reactions of 2-(benzimidazol-2-yl)-6-methylpyridine (L1) or 8-(benzimidazol-2-yl)quinaldine (L2) with trialkylaluminium reagents R(3)Al (R = Me, Et and iBu) afforded the corresponding dialkylaluminium benzimidazolate complexes R(2)AlL (L1, R = Me (1), Et (2), iBu (3); L2 R = Me (4), Et (5), iBu (6)). Treatment of L1 with one or two equivalents of Et(2)AlCl ...

The transport of organic contaminants in porous media is frequently influenced by nonequilibrium sorption and/or nonlinear sorption. In this study, sorption of coal tar related contaminants with different sorption properties, i.e., toluene, quinoline, quinaldine, and benzotriazole, was studied in column experiments using a European reference soil and compared with batch ...

The separation of four kinds of nitrogen heterocyclic compounds (NHCs) from a model mixture comprising NHCs (indole (In), quinoline (Q), iso-quinoline (iQ), quinaldine (Qu)), three kinds of bicyclic aromatic compounds (BACs; 1-methyl-naphthalene (IMN), 2-methyl naphthalene (2MN), dimethylnaphthalene (DMN)), biphenyl (Bp) and phenyl ether (Pe) was examined by a solvent ...

A separation/preconcentration of aluminum (III) (Al(3+)) has been developed to overcome the problem of high matrix species, which may interfere with the determination of trace quantity of Al(3+) in natural water samples. The separation of Al(3+) in water samples was carried out from interfering cations by complexing them with 2-methyle 8-hyroxyquinoline (quinaldine) on ...

A new method is reported for the separation of aluminum ions [Al(III)] from interfering elements in parenteral and pharmaceutical solutions (PS) and bottled mineral water (BMW) samples, through solid-phase extraction with 2-methyl-8-hydroxyquinoline (quinaldine) adsorbed onto activated silica gel. While the enrichment step of separated Al(III) was carried out by cloud point ...

Cloud point extraction method has been developed for preconcentration of trace quantities of zinc (Zn) in aqueous extract of medicinal plants and blood samples of liver cancer patients using flame atomic absorption spectrometry. The Zn in aqueous extracts of medicinal plants (MPs) was complexed with 2-methyl-8-hydroxyquinoline (quinaldine) and 1-(2-pyridylazo)-2-naphthol (PAN) ...

Many N-heteroaromatic compounds are utilized by micro-organisms as a source of carbon (and nitrogen) and energy. The aerobic bacterial degradation of these growth substrates frequently involves several hydroxylation steps and subsequent dioxygenolytic cleavage of (di)hydroxy-substituted heteroaromatic intermediates to aliphatic metabolites which finally are channeled into central metabolic ...

N-acetylanthranilate amidase (Amq), a 32.8-kDa monomeric amide hydrolase, is involved in quinaldine degradation by Arthrobacter nitroguajacolicus R�61a. Sequence analysis and secondary structure predictions indicated that Amq is related to carboxylesterases and belongs to the ?/?-hydrolase-fold superfamily of enzymes; inactivation of (His₆-tagged) Amq ...