Browsing by Issue Date Artículos de revistas
Now showing items 481-500 of 2801
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(PERGAMON-ELSEVIER SCIENCE LTD, 1996-05)Ecto-nucleotidases may have a role in the regulation of purinoceptor-mediated responses. ATP-diphosphohydrolase or apyrase has been described as an ecto-nucleotidase, which is characterized by a low specificity for its ...
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(ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS, 1996-05)An integrated retention/photometric detection method for the determination of microamounts of iron was developed. The method is based on the retention of the reaction product of the analyte with ferrozine in a flow cell ...
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(ASSOC BRAS DIVULG CIENTIFICA, 1996-05)ATP-diphosphohydrolase (apyrase, EC 3.6.1.5) has both ATPase and ADPase activity that are stimulated by bivalent metals, with Ca2+ being the most effective. The possible physiological function of this enzyme, associated ...
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(AMER CHEMICAL SOC, 1996-05-15)The roles of chemical kinetics and mass transfer in two types of bioreactors (packed-column reactors and rotating disk bioreactors), used with continuous-now sample/reagent(s) processing, are discussed in detail. A normalized ...
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(AMER SOC PHOTOBIOLOGY, 1996-06)An equation is proposed for the evaluation of partition or association constants from fluorescence properties (such as spectrum shape or anisotropy) whose values are not linearly related to the solute distribution. The ...
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(MUNKSGAARD INT PUBL LTD, 1996-06-15)The title complex, [CuBr2(C12H11N3)], is a monomer and the environment around the Cu2+ ion is that of a square pyramid, with one Br- ion occupying the apical site and the other Br- ion at a basal position.
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(AMER SOC MICROBIOLOGY, 1996-07)Lignin peroxidase-like genes were PCR amplified from Phanerochaete sordida and Ceriporiopsis subvermispora, fungi lacking lignin peroxidase (LiP) activity. Amplification products were highly similar to previously described ...
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(ACADEMIC PRESS AUST, 1996-08)Extracellular nucleotides interact with specific receptors on the cell surface and are locally metabolized by ecto-nucleotidases. Biochemical characterization of the ATPase and ADPase activities detected in rat heart ...
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(ROYAL PHARMACEUTICAL SOC GREAT BRITAIN, 1996-09)The effects of bakuchiol, a meroterpenoid isolated from the leaves of Psoralea glandulosa L., on phospholipase A(2) (PLA(2)) activity from different sources, human neutrophil responses, zymosan air pouch and topical ...
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(AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC, 1996-09-06)ATP diphosphohydrolase from tegumental membranes of Schistosoma mansoni was solubilized with Triton X-100 plus deoxycholate and separated by preparative nondenaturing polyacrylamide gel electrophoresis. Two isoforms with ...
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(TAYLOR & FRANCIS LTD, 1996-12)X-ray structure determination and pyroelectric and piezoelectric measurements have been carried out on mesogenic mixtures composed of achiral side chain polymers and their monomers. Certain mixtures show antiferroelectric ...
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(Universidad de Chile, 1997)Cuando Platón regresó a Atenas en el año 387 a.C., se estableció una escuela de filosofía en un jardín, a poco más de 1 Km. de distancia de la ciudad, con olivos, estatuas y templos, denominado Academos, en honor a su ...
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(MARCEL DEKKER INC, 1997)Determinations were made of total soil organic matter (SOM), stable and labile organic fractions, biomass carbon (C), and chemical composition of several humus-soil-fractions in chilean volcanic soils, Andosols and Ultisols. ...
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(Sociedad Chilena de Química, 1997)En el presente estudio se analizaron los aspectos generales y la aplicabilidad de la técnica de Electroforesis Capilar de Zona (ECZ), evaluando la repetibilidad y sensibilidad de los resultados obtenidos al trabajar con ...
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(Taylor & Francis Ltd., 1997)The syntheses and structural properties of four liquid crystalline monomers are presented. They are prepared by two different reaction pathways. Transition temperatures and phase characterization were done by DSC, ...
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(1997)The sensitized photo-oxidation of boldine and its permethylated derivative, glaucine, has been studied in several solvents using steady-state kinetic methods. Values of kB, the total rate constant for the reaction between ...
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(Sociedad Chilena de Química, 1997)D-β-Mannosamine reacts with cobalt(III) bis-phenanthroline to form a single 1:1 complex with the ∆ configuration at Co(III) which can be isolated as the stable triiodide salt.
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(Elsevier Science Publishers B. V., 1997)Acid dissociation constants of α- and β-D-glucos-, mannos-, and galactos-ammonium ions have been determined from 1H NMR chemical shifts of the individual anomers in D2O. Values of pKa(D) for the α- and β-ammonium ions ...
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(JOHN WILEY & SONS INC, 1997)A simple design of a polarographic flow-through cell is proposed in which a conventional dropping mercury electrode (DME) is used as working electrode, and a mercury pool and a platinum wire are used as the reference and ...
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(PERGAMON-ELSEVIER SCIENCE LTD, 1997)The electro-reduction of nitrate ions in acid medium on Pt, Ir and on a 70:30 Pt, Ir alloy was studied by cyclic voltammetry. The alloy has a higher activity than the pure metals, which was interpreted as being due to ...
