Browsing by Issue Date Artículos de revistas
Now showing items 761-780 of 2801
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(2001)Capillary zone electrophoresis with indirect UV detection at 254 nm was found to be suitable for the determination of organic acids and phosphate in aqueous extracts of soil. The best support electrolyte solution was found ...
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(Instituto de la Grasa, 2001)Oxidative stability of crisps fried in two vegetable oils: sunflower oil (SO) and partially hydrogenated sunflower oil (PHSO), was studied. Crisps were stored at temperature at daylight, at 40°C in oven, and a -23°C as a ...
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(2001)Mixed complexes of bis-phenanthroline cobalt(III) and α-D-galactose or β-D- or L-arabinose are identified in aqueous solution from their 1H NMR and circular dichroism (CD) spectra. Galactose forms only the Δ-complex, but ...
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(American Chemical Society, 2001)Continuum solvent effect on the electrophilicity index recently proposed by Parr and co-workers (Parr, R. G.; von Szentpaly, L.; Liu, S. J. Am. Chem. Soc. 1999, 121, 1922) is discussed in detail. Solvent effect is introduced ...
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(2001)Genetic analyses of the lignin-degrading fungus Ceriporiopsis subvermispora is complicated by a dikaryotic nuclear condition and the absence of spore forms. Previous investigations had identified a family of closely related ...
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(2001)A hallmark event in transmissible spongiform encephalopathies is the conversion of the physiological prion protein into the disease-associated isoform. A natural polymorphism at codon 129 of the human prion gene, resulting ...
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(2001)Detection of O2(1Δg) emission, λmax = 1270 nm, following laser excitation and steady-state methods were employed to measure total, kT, and chemical, kR, reaction rate constants for the reaction between 3-methylindole and ...
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(2001)Ruthenium (II) complexes of the type RuL(CO)(2)Cl-2, [RuL(CO)(2)L-2'](2+) and [RuL(CO)(2)Cl L'](+) [L=bipyridine (bpy), phenanthroline (phen), biquinoline (biq) and L'=pyridine (py), 4-chloropyridine (Cl-py), 4-methoxypyridine ...
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(2001)We investigated the possibility that norepinephrine from the human ovary is released after nerve stimulation and that this neurotransmitter is coupled to a steroidogenic response. Biologically significant levels of both ...
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(2001)The structural elucidation of complex organic molecules relies heavily on the application of proton detected heteronuclear NMR. Among these techniques, the HMBC NMR experiment is probably the most useful 2D NMR method. The ...
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(2001)Different goat cheeses from Chile were studied by Free-Choice Profile (FCP) analysis. Generalized Procrustes Analysis (GPA) applied to FCP data permitted differentiation between samples and informed on the attributes ...
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(Sociedad Chilena de Quimica, 2001)This communication describes the application of a hollow-fiber-type solid supported liquid membrane technique to the study of recovery and enrichment of molybdenum with Alamine 336 (a long chain tertiary amine) from acid ...
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(Sociedad Chilena de Quimica, 2001)Maleic anhydride - styrène copolymers were synthesized in acetone-toluene solution at 60° C by azo-bisisobutironitrile.The copolymers were characterized by Gel Permeation Chromatography and Differential Scanning Calorimetry.The ...
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(2001)Melatonin and Vitamin B6 can be oxidized at the glassy carbon electrode showing well-resolved anodic peaks by differential pulse voltammetry. Vitamin B6 shows an oxidation peak potential of about 650 mV vs Ag/AgCI in ammonia ...
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(Instituto de la Grasa, 2001)The progression of deterioration of crisps stored at room temperature (day light and darkness), and in darkness at 40°C and -23°C (control) was evaluated. The samples were obtained from a leader industry of the chilean ...
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(Sociedad Española de Cardiología, 2001)En este modelo experimental de HVI hipertensiva mixta existe una activación temprana de la ECA plasmática y cardíaca. La administración precoz de un IECA previene el desarrollo de hipertensión e HVI al inhibir el aumento ...
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(MARCEL DEKKER, 2001)PA-824 (2-nitro-6-(4-trifluoromethoxy-benzyloxy)-6,7-dihydro-5H-imidazo [2,1-b][1,3]oxazine) a nitroimidazopyran drug candidate for the treatment of tuberculosis was electrochemically studied with the aims of to propose a ...
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(ELSEVIER SCIENCE, 2001-01)This paper reports the feasibility of free radicals formation from flutamide by using cyclic voltammetry. The electrochemical characteristics and the reactivity of the one-electron reduction product from flutamide in mixed ...
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Simultaneous determination of ascorbic acid and acetylsalicylic acid in pharmaceutical formulations (AOAC INTERNATIONAL, 2001-02)A direct, simple, and practical first-derivative spectrophotometric method is described for simultaneous determination of ascorbic acid and acetylsalicylic acid. The effects of the solvent, excipients, and spectral variables ...
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(MUNKSGAARD INT PUBL LTD, 2001-02)The crystal structures of four alkyl 3-oxo-2-(triphenylphosphoranylidene)butyrates, where the alkyl group is methyl (C23H21O3P .0.5C(6)H(6)), (II), ethyl (C24H23O3P), (III), isopropyl (C25H25O3P), (IV), or tert-butyl ...
