Artículos de revistas: Recent submissions
Now showing items 4761-4780 of 4970
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(UNIV CHICAGO PRESS, 2006-10)Anuran metamorphosis is one of the most spectacular processes in nature. Metamorphosis entails morphological transformations and extensive changes in feeding habits, such as transforming from an herbivore to a carnivore. ...
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(PERGAMON-ELSEVIER SCIENCE LTD, 2006-01-02)The phosphazene copolymers {[NP(O2C12H8)](0.5)[NP(O-C6H4-CO2Pr")(O-C6H4-L)](0.5)}(n) [L=CN (1), PPh2, (2)] and {[NP(O2C12H8)](0.6)[NP(O-C6H4-CO2Pr")(O-C6H4-L)](0.4)}(n) (3) have been synthesized by sequential substitution ...
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(ELSEVIER, 2006-03-20)In this work, the nuclear reactivity indices of density functional theory have been generalized to the spin polarized case and their relationship to electron spin polarized indices has been established. in particular, the ...
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(ELSEVIER, 2006-04-28)Two classical tools, the intermolecular stretching force constants of H-bonded complexes and the molecular electrostatic potential are used to propose a nucleophilicity index evaluated for a series of pyridines. The model ...
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(ELSEVIER, 2006-05-10)We propose and test an empirical nucleofugality index to rank the leaving group ability of a series of molecular fragments present in nucleophilic substitution reactions of carbonyl and thiocarbonyl derivatives. The ...
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(PERGAMON-ELSEVIER SCIENCE LTD, 2006-08-01)We establish the existence of a positive solution for the following non-variational equation {-div(|x|(-2a)del u)=|x|(-2(a+1)+c) f(x,u,del u), in Omega u=0, on partial derivative Omega, where the non-linearity f (x,t,xi) ...
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(ACADEMIC PRESS INC ELSEVIER SCIENCE, 2006-08-15)We consider three-dimensional Schrodinger operators with constant magnetic fields and ergodic electric potentials. We study the strong magnetic field asymptotic behaviour of the integrated density of states, distinguishing ...
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(INST MATHEMATICAL STATISTICS, 2006-07)We study the standard property of the natural filtration associated to a 0-1 valued stationary process. In our main result we show that if the process has summable memory decay, then the associated filtration is standard. ...
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(ACADEMIC PRESS INC ELSEVIER SCIENCE, 2006-03-01)The effect of 1-decanol on the potentiometric response of three ion-selective electrodes to large cationic species is analyzed. The electrodes were constructed with plasticized PVC membranes. The results suggest that ...
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(BLACKWELL, 2006-09)Escherichia coli contains two phosphofructokinases, Pfk-1 and Pfk-2, which belong to unrelated protein families. In addition to catalytic function, the enzymes have converged in showing substrate inhibition by the nucleotide ...
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(AMERICAN PHYSICAL SOC, 2006-01)A modified version of the Moller-Plesset approach for obtaining the correlation energy associated with a Hartree-Fock ground state is proposed. The method is tested in a model of interacting fermions that allows for an ...
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(ELSEVIER, 2006-07)Parasites have been shown to manipulate the feeding behaviour of their invertebrate vectors, which results in an increased probability of transmission to definitive hosts. Most evidence for this hypothesis comes from ...
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Apoptosis induced by prolonged exposure to odorants in cultured cells from rat olfactory epithelium (ELSEVIER, 2006-08-04)Multicellular organisms undergo programmed cell death (PCD) as a mechanism for tissue remodeling during development and tissue renewal throughout adult life. Overdose of some neuronal receptor agonists like glutamate can ...
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(WILEY-V C H VERLAG GMBH, 2006-01)This study presents a very fast GC analysis applied for the baseline separation of isomeric tropane alkaloids extracted from the stem-bark of Schizanthus grahamii (Solanaceae). The work provided a challenging application ...
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(PERGAMON-ELSEVIER SCIENCE LTD, 2006-02-24)This study presents the outstanding chromatographic selectivity of a porous graphitic carbon support for the separation of four isomeric tropane alkaloids from the stem-bark of Schizanthus grahamii (Solanaceae). Capillary ...
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(TAYLOR & FRANCIS INC, 2006)The class of rank 3 algebras includes the Jordan algebra of a symmetric bilinear form, the trace zero elements of a Jordan algebra of degree 3, pseudo-composition algebras, certain algebras that arise in the study of Riccati ...
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(GAUTHIER-VILLARS/EDITIONS ELSEVIER, 2006)We study the dynamics of skew product endomorphisms acting on the cylinder R/Z x R, of the form (theta, t) -> (l theta, gimel t + tau(theta)), where l >= 2 is an integer, gimel is an element of (0, 1) and tau : R/Z -> ...
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(AMER PHYSIOLOGICAL SOC, 2006-09)To maintain water balance, nectar-feeding vertebrates oscillate between meeting the challenges of avoiding overhydration and preventing dehydration. To understand how green-backed firecrowns (Sephanoides sephanoides) ...
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(ELSEVIER, 2006-07-11)Different strategies to improve the excited state properties of polypyridinic complexes by varying ligand structure and molecular geometry are described. Bidentate and tetradentate ligands based on fragments as ...
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(COLD SPRING HARBOR LAB PRESS, 2006-03)The goal of this work was to determine the binding properties and location of 4',6-diamidino-2-phenyl=indole (DAPI) complexed with tubulin. Using fluorescence anisotropy, a dissociation constant of 5.2 +/- 0.4 mu M for the ...
