Browsing by Issue Date Artículos de revistas
Now showing items 901-920 of 2801
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(CHEMICAL SOC JAPAN, 2002-09)Hydroxyl and phenyl radical spin trapping rates by alpha-phenyl-N-t-butylnitrone (PBN, N-benzylidene-t-butylamine N-oxide) and its analogs were determined using a competitive trapping method. Hydroxyl radical was generated ...
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(ELSEVIER SCIENCE INC, 2002-09)Neuropeptide Y (NPY) and noradrenaline (NA) are co-transmitters at many sympathetic synapses, but it is not yet clear if their release is independently regulated. To address this question, we quantified the electrically ...
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(PERGAMON-ELSEVIER SCIENCE LTD, 2002-09)A set of structurally related compounds incorporating a carbonyl group in the ortho position with regard to a phenol function were tested against the TA3 mouse carcinoma cell line and its multidrug-resistant variant ...
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(PERGAMON-ELSEVIER SCIENCE LTD, 2002-09)Sulphur distribution with an insight in S-organic fractions was studied in volcanic-ash derived soils of Chile (Typic Dystrandepts, Palehumult) by isolating each fraction and measuring S directly by instrumental elemental ...
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(SOCIEDAD CHILENA DE QUIMICA, 2002-09)Acrylamide can be polymerized using new catalytic systems. These are based on rhenium complexes as photosensitizers with triethylamine (TEA). Electron Spin Resonance (ESR) was used for the detection of radicals species ...
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(ELSEVIER SCIENCE BV, 2002-09)The effects of some imine and amine derivatives of vanillin on the respiration rate of mouse mammary adenocarcinoma TA3 line, its multiresistant variant TA3-MTX-R line and mouse hepatocytes, together with their respective ...
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(WILEY-V C H VERLAG GMBH, 2002-09)Lercanidipine is a new third generation 1,4-dihydropyridine calcium antagonist derivative used in hypertension treatments. From the structural point of view lercanidipine contains a nitroaromatic moiety which can be ...
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(SOCIEDAD CHILENA DE QUIMICA, 2002-09)Kraft bleached cellulose from Pinus radiata was submitted to methylation reactions in heterogeneous media. After activation with 29% (w/w) NaOH solution, methylation reactions were carried out both with dimethyl sulfate ...
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(SOCIEDAD CHILENA DE QUIMICA, 2002-09)A direct and simple second derivative digital spectrophometric method has been developed for the simultaneous determination of the sulfamethoxazole and trimethoprim in pharmaceutical formulation. A study of the spectral ...
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(PORTLAND PRESS, 2002-09-15)The aim of the present study was to evaluate the capacity of synthetic L- and D-peptides encompassing the HIV-1(BRU) gp160 REKR cleavage site to interfere with HIV and simian immunodeficiency virus (SIV) replication and ...
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(PERGAMON-ELSEVIER SCIENCE, 2002-09-25)We have studied the electrochemical reduction of some nitroimidazoles such as megazol(2-amino-5-(1-methyl-5-nitro-2-imidazolyl)-1,3,4-thiadiazol, CAS 19622-55-0) and two related derivatives in aprotic media (100% DMF, 0.1 ...
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(ELECTROCHEMICAL SOC INC, 2002-10)A comprehensive study of the electrochemical characteristics of 2-, 3-, and 4-nitroanisole isomers in three different electrolytic media has been carried out. Furthermore, kinetic characterization of the one-electron ...
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(SAGE PUBLICATIONS LTD, 2002-10)The effect of combined processes of osmotic dehydration, and freezing on papaya pieces preservation was evaluated. Sucrose solutions were used as osmotic medium. Two multifactorial experimental designs, in two levels, were ...
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(WILEY-V C H VERLAG GMBH, 2002-10)A flow through electrochemical cell was designed for the implementation of a simple, efficient, rapid and sensitive method for determination of mercury in water samples by anodic stripping voltammetry. A solid gold or a ...
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(OXFORD UNIV PRESS, 2002-10)BACKGROUND: The aim of this study was to evaluate the peripheral serum androgen concentrations in normal and polycystic ovarian syndrome (PCOS) women during pregnancy, in order to establish if PCOS may induce gestational ...
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(CAMBRIDGE UNIV PRESS, 2002-10-01)The hypothesis that nitric oxide plays a key role in the regulation of adrenal blood flow and plasma concentrations of cortisol and catecholamines under basal and hypoxaemic conditions in the llama fetus was tested. At ...
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(PERGAMON-ELSEVIER SCIENCE LTD, 2002-10-01)The two 1,10-phenanthroline ligands in the mixed Delta-cobalt(III) complex with sucrose are in different environments relative to the sucrose ligand as shown by differences in their H-1 NMR signals and predicted by structural ...
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(ELSEVIER SCI IRELAND LTD, 2002-10-04)It has previously been shown that adrenalectomy (ADX) produces apoptosis in the granule cell of the dentate gyrus (DG), and that this effect is prevented by corticosterone replacement. Thus, we have investigated how this ...
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(GOVI-VERLAG GMBH, 2002-11)The aim of this work was to study the performance of chitosan (CB) grafted with acrylamide (CB-g-A) as prolonged drug release matrix as compared with unmodified chitosan. A non-pH dependent swelling behaviour for the matrix ...
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(AOAC INTERNATIONAL, 2002-11)Lercanidipine in ethanol-0.04M Britton-Robinson buffer (20 + 80) gives an irreversible anodic response on a glassy carbon electrode in a broad pH range (2-12) that depends on pH. This signal can be attributed to oxidation ...