Browsing by Issue Date Artículos de revistas
Now showing items 1181-1200 of 2801
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(PERGAMON-ELSEVIER SCIENCE LTD, 2005-06-28)The title compound (sucrose Co(phen)(2)) is a dication with the Delta-configuration at Co(III) and ligation through O-2(g) and OH-1(f). Earlier geometrical optimization with semi-empirical PM3(tm) parameters had fitted ...
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Voltammetric behavior of zaleplon and its differential pulse polarographic determination in capsules (AOAC INTERNATIONAL, 2005-07)In this work both the electrochemical behavior and the analysis of the hypnotic pyrazolopyrimidine derivative zaleplon were studied. Zaleplon in ethanol-0.1 M Britton Robinson buffer solution (30-70) showed 2 irreversible, ...
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(PERGAMON-ELSEVIER SCIENCE LTD, 2005-07)The ESR spectra of radicals obtained by electrolytic reduction of 2-acylpyridines and 6,6'-diacyl-2,2'-bipyridines were measured in dimethylsulfoxide (DMSO) and analyzed by quantum chemical calculations. The electrochemistry ...
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(AMER CHEMICAL SOC, 2005-07-07)Photoreduction by amines of oxoisoaporphine dyes occurs via a stepwise mechanism of electron-proton electron transfer that leads to the metastable N-hydrogen oxoisoaporphine anion. During photoreduction that occurs from ...
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(EXCERPTA MEDICA INC, 2005-07-15)Radionuclide isotopic ventriculography with phase analysis was performed in 30 patients with stable heart failure (HF), determining left ventricular (LV) and interventricular contraction synchrony at baseline and after 6 ...
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(EDICIONES DOYMA S/L, 2005-08)The small guanosine triphosphatase Rho and its target, Rho kinase, play important roles in both blood pressure regulation and vascular smooth muscle contraction. Rho is activated by agonists of receptors coupled to cell ...
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3-(Triphenylphosphoranylidene)-pentane-2,4-dione and diethyl 2-(triphenylphosphoranylidene)-malonate (BLACKWELL PUBLISHING, 2005-08)The title ylides, 3-(triphenylphosphoranylidene) pentane-2,4-dione, C23H21O2P, (I), and diethyl 2-(triphenylphosphoranylidene)malonate, C25H25O4P, (II), differ in the conformations adopted by their extended ylide moieties. ...
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(BIOMACROMOLECULES 6(5):2389-2395, 2005-09)The aim of this work was to establish the diltiazem hydrochloride release mechanism from the chitosan-alginate matrix tablet (MCB/AS) and chitosan-carrageenan matrix tablet (MCS/CSI). The weight loss for MCS/CSI is mainly ...
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(ARCHIVOS LATINOAMERICANOS NUTRICION, 2005-09)The initial microflora of minimally processed celery and cabbage packaged under a modified atmosphere was determined. The samples came from the same producer and were sold in a supermarket chain of Santiago, Chile. Although ...
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(MOLECULAR DIVERSITY PRESERVATION INTERNATIONAL, 2005-09)The relationship between the herbicidal activity of a number of novel 1,2,5- oxadiazole N-oxides and some physicochemical properties potentially related with this bioactivity, such as polarity, molecular volume, proton ...
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(LIPPINCOTT WILLIAMS & WILKINS, 2005-09)Administration of the P-adrenergic agonist isoproterenol results in cardiac apoptosis. The effect of short-term P-adrenergic stimulation by isoproterenol on the activity of plasma, lung, and left ventricular (LV) angiotensin ...
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(ELSEVIER SCIENCE BV, 2005-09)An ethylene-propylene copolymer (EPR) was functionalized in the melt by grafting with itaconic acid and its mono- and di-methyl esters by using dicumyl peroxide as radical initiator. Grafting reactions were carried out in ...
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(WILEY-V C H VERLAG GMBH, 2005-09)The electrochemical behavior of iodo nitroimidazole derivatives such as 1-methyl-4-iodo-5-nitroimidazole (M-I-NIm) and 1-methyl-2,4-diiodo-5-nitroimidazole (M-I-2-NIm) and the parent compound 1-methyl-5-nitroimidazole ...
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(ELSEVIER SCIENCE BV, 2005-09-14)The rhodium(l) complexes, cis-[Rh(CO)(2)(amine)(2)] (PF6) (amine = pyridine, 2-picoline, 3-picoline, 4-picoline, 3,5-lutidine or 2,6-lutidine) dissolved in methanol under carbon monoxide atmosphere are effective catalysts ...
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(PERGAMON-ELSEVIER SCIENCE LTD, 2005-10)Cyclic voltammetry and electron spin resonance (ESR) techniques were used in the investigation of several potential antiprotozoal thiosemicarbazones nitrofurane derivatives. A self-protonation process involving the ...
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(SPRINGER/PLENUM PUBLISHERS, 2005-10)Purpose. The aims of the study are to analyze the interaction between 5-aminosalicylic acid (5-ASA) and peroxyl radicals and to evaluate the effect of some endogenous compounds such as ascorbic acid and amino acids on the ...
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(0887-624X, 2005-10-15)The free-radical copolymerization of N-phenylmaleimide (N-PhMI) with acrylic acid was studied in the range of 25-75 mol % in the feed. The interactions of these copolymers with Cu(H) and Co(H) ions were investigated as a ...
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(AMER CHEMICAL SOC, 2005-10-28)Photoreduction of oxoisoaporphine dyes occurs via a stepwise mechanism of electron-protonelectron transfer that leads to the N-hydrogen oxoisoaporphine anion. When triethylamine, TEA, was used as the electron donor in ...
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(ELSEVIER SCIENCE SA, 2005-10-31)The ability to generate singlet molecular oxygen, O-2((1)Delta(g)), and the scavenging activity of two well-known 1,4-dihydropyridines (1,4-DHPs) such as nifedipine (1,4-dihydro-2,6-dimethyl-4-(2-nitrophenyl)-3,5-pyridin ...
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(ELSEVIER SCIENCE, 2005-10-31)Detection of O-2((1)Delta(g)) emission, lambda(max) = 1270 nm, following laser excitation and steady-state methods were employed to measure the total reaction rate constant, k(T), and the reactive reaction rate constant, ...
