Browsing by Title Facultad de Ciencias
Now showing items 5578-5597 of 8181
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(2009)In analogy with Sanderson's electronegativity equalization principle, it is possible to postulate a principle of spin potential equalization in the E[Nα, Nβ] representation of the spin polarized density functional theory, ...
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(Elsevier, 2013)The consumption of hallucinogenic substances is a long-standing tradition in the Americas. San Pedro de Atacama (SPA) in Northern Chile is the archaeological zone with the highest incidence of snuffing implements in the ...
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(Universidad de Chile, 2024)Dada una curva el´ıptica E/Q, la conjetura de Birch-Swinnerton-Dyer predice que el rango de E y el orden de anulaci´on de L(E, s) en s = 1 son iguales. M´as a´un, una formulaci´on m´as fuerte de esta conjetura relaciona ...
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(UNIV CHICAGO PRESS, 2007-01)The effects of energy on food web structure have been debated for at least 80 years. Nevertheless, the empirical evidence is meager, especially from terrestrial ecosystems. We analyzed long-term temporal variation in food ...
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(SOCIEDAD BIOLOGIA CHILE, 2006-09)It has been hypothesized that species belonging to the Sturnidae-Muscicapidae lineage, despite having generalist diets comprising fruits with sugars of diverse kinds, do not express intestinal sucrase. In order to increase ...
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(BLACKWELL, 2007-09)Understanding the factors that constrain and drive changes in food chain length represents an open challenge in ecology. Although several explanatory hypotheses have been proposed, no synthesis has yet been achieved. The ...
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(2009)The electronic properties of a chemical model that mimics the His-57 ••• Asp-102 catalytic residues of α-chymotrypsine during the transition from normal hydrogen bond to short and strong hydrogen-bond regimes are presented. ...
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(1990)Ab initio torsional potential functions for a series of representative sulphur-containing molecules are presented. A few interesting parameters determining the relevant characteristics of the intermediate conformations ...
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(1986)Further developments in the local reaction field (LRF) model of solvent effects are presented. The improved formalism, including dielectric saturation effects, permits a better description of the solvent polarization vector. ...
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(Wiley, 1985)The introduction of local dielectric effects within the SCF theory of continuum solvent effects representation is examined at a semiempirical level. The formalism is developed in the frame of the reaction field theory ...
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(SPRINGER, 2007-08)Forest bird species exhibit noticeable seasonal behavioral changes that might lead to contrasting effects of landscape pattern upon species abundance and performance. We assessed if the effect of patch and habitat attributes ...
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(IOS Press, 2004)© 2004 IOS Press and the authors. The static dipole polarizabilities of three series of clusters have been calculated and compared. They are the bare lithium clusters, the copper clusters and the mixed lithium-copper ...
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(2002)The static electric dipole polarizability of small Si clusters was investigated. The methods used were based on different techniques to calculate the polarizability. Thus, some methods used the higher-order finite-difference ...
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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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(SOCIEDAD CHILENA DE QUIMICA, 2006-06)A Density Functional microscopic model of C-60, consisting of seven molecular orbitals (3 occupied and 4 empty), was employed to get the best values for the half-width and the scanning distance of the mathematical function ...
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(BLACKWELL, 2006-02)Little is known about how animals acquire and use prior information, particularly for Bayesian patch assessment strategies. Because different patch assessment strategies rely upon distinct capabilities to obtain information, ...
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On the variations of electronic chemical potential and chemical hardness induced by solvent effects (ELSEVIER, 2006-12-29)The effects that a polarizable medium exerts on the electronic chemical potential and the chemical hardness of neutral and charged molecules are discussed in detail, using the continuum approach based on the polarizable ...
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(MDPI, 2022)A wide variety of materials, strategies, and methods have been proposed to face the challenge of wastewater pollution. The most innovative and promising approaches include the hybrid materials made of polymeric nanofibers ...
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(1985)Let E, F be two fields of characteristic 2 and let W(E), W(F) be the Witt rings of non-singular symmetric bilinear forms over E and F. In this note it is proved that if dimE2 E = dimF2 F > 2, then E ≅ F is equivalent ...