Artículos de revistas: Recent submissions
Now showing items 4941-4960 of 4970
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(PERGAMON-ELSEVIER SCIENCE LTD, 2004-12-06)The regioselectivity for a series of four 1,3-dipolar cycloaddition reactions has been studied using global and local reactivity indexes. The results of the theoretical analysis suggest that for asynchronous cycloadditions ...
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(PERGAMON-ELSEVIER SCIENCE LTD, 2004-03-25)The series of complexes [N3P3(OC6H5)(5)X.MLn]PF6, X = OC6H4CH2CN, N(CH3)(CH2)(2)CN or OC6H4PPh2, and [N3P3(X)(6) (MLn)(6)](PF6)(6), X = OC6H4CH2CN or N(CH3)(CH2)(2)CN with MLn = CpFe(dppe) and CpRu(PPh3)(2) have been ...
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(ELSEVIER, 2004-08-04)Here we analyse the structural organisation and expression of the zebrafish cellular nucleic acid-binding protein (zCNBP) gene and protein. The gene is organised in five exons and four introns. A noteworthy feature of the ...
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(SPRINGER-VERLAG BERLIN, 2004)Mobile solutions have gone beyond the role of personal tool to offer solutions in supporting coordinated work. Mobile workers shift constantly from individual to group work, access shared virtual environments from different ...
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(AMER CHEMICAL SOC, 2005-05-12)Spin forbidden 1,2-cycloadditions of triplet methylene to alkenes have been theoretically studied as an example of the two-state reactivity paradigm in organic chemistry. The cycloadditions of triplet methylene to ethylene ...
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(ELSEVIER, 2004-10-21)A serious discrepancy of almost 20% has been found between the experimentally measured static dipole polarizability of aluminium atom and very exhaustive theoretical calculations. This fact is important because in some ...
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(ELSEVIER, 2004-10-21)All-electron spin polarized DFT calculations have been performed to optimize the pentagonal bipyramidal (D-5h) geometry of the Cu-7 cluster by using the B3LYP and the B3PW1 functionals with different basis sets. Dirac ...
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(ELSEVIER, 2004-07-26)This paper presents the results obtained using a genetic algorithm (GA) to search for stable structures of Cu-silicon clusters. In this work the GA uses a semiempirical energy function to find the best cluster structures, ...
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(ELSEVIER, 2004-12)The carotid body (CB) is the main arterial chemoreceptor. The most accepted model of arterial chemoreception postulates that carotid body glomus (type 1) cells are the primary receptors, which are synaptically connected ...
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(BLACKWELL, 2004-10-15)The carotid body (CB) chemoreceptors may play an important role in the enhanced hypoxic ventilatory response induced by chronic intermittent hypoxia (CIH). We studied the effects of cyclic hypoxic episodes of short duration ...
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(INDIAN ACADEMY SCIENCES, 2005-09)Use of regions of space defined by topological analysis of electron localization function (ELF) as reactivity descriptors is explored. By starting from the fact that the ELF presents high values in the regions where it is ...
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(SOCIEDAD BIOLGIA CHILE, 2005-06)Passerines lack functional salt glands and to a large extent avoid feeding on marine invertebrates. An exception is Cinclodes nigrofulnosits. Previous studies reported that the contents of its gastrointestinal tract had a ...
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(ELSEVIER SCIENCE INC, 2005-01)The intestinal plasticity of digestive enzymes of amphibian species is poorly known. The goal of this study was to characterize digestive enzyme profiles along the small intestine of adult frogs, Xenopus laevis, in response ...
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(ELSEVIER SCI LTD, 2005-01)In the search for a unified basis for constructing food-web models, the long-standing discrepancy between biomass conversion (BC) and individual survival (IS) modeling has been revitalized by Ginzburg (J. Anim. Ecol. 67 ...
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(SOCIEDAD CHILENA DE QUIMICA, 2005-09)The leaves of Duguetia vallicola, a fairly common, large evergreen tree from the coastal regions of Panama, Colombia and Venezuela, contain (6aS)-glaziovine (1) as a major constituent. The abundance and renewable character ...
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(SOCIEDAD BIOLGIA CHILE, 2005-06)Studies of metabolic capacities in rodents have been largely Studied at an inter-specific levels, but physiological capacities of populations belonging to the same species have received lesser attention. Here we studied ...
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(ELSEVIER SCIENCE INC, 2005-02)Gut plasticity is a trait with implications on animal performance. However, and despite their importance as study models in physiology, research on gut flexibility in amphibians is scarce. In the present work, we analyse ...
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(PERGAMON-ELSEVIER SCIENCE LTD, 2004-10-01)Glutathione (GSH) constitutes the single most important antioxidant in neurons, whereas iron causes oxidative stress that leads to cell damage and death. Although GSH and iron produce opposite effects on redox cell status, ...
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(ACADEMIC PRESS INC ELSEVIER SCIENCE, 2004-04-15)Inflammation is a process that has been actively related with the onset of several neurodegenerative disorders including Alzheimer disease (AD). However, the precise implications of inflammatory response for neurodegeneration ...
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(ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD, 2004-09)Although many factors have been shown to influence the evolution of species recognition signals in a wide variety of taxa, it is difficult to draw general conclusions because of fundamental differences in the morphologies ...
