Browsing by Title
Now showing items 32280-32299 of 92398
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(American Chemical Society, 1996)A combined methodology of semiempirical density functional (DFT) and Hartree-Fock (HF) theories is used to analyze the solution-phase proton-transfer (PT) process in the H2O⋯HX (X = F, Cl, and OH) model systems. Gas-phase ...
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(1993)Density functional theory provides physically meaningful ionic radii to build up electrostatic potentials for singly charged negative and positive monoatomic ions. On the basis of these electrostatic potentials, electrostatic ...
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(1990)We consider electrostatic instabilities in a plasma composed of an ion beam moving in a stationary background of electrons and ions. Analytical expressions for the ion-acoustic and ion-ion acoustic instabilities are ...
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(Blackwell Publishing Ltd, 2004)We study the effect of a large-amplitude left-hand polarized wave on ion acoustic instabilities. We show that the presence of a finite amplitude left-hand polarized wave produces electrostatic instabilities above a threshold ...
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(Blackwell Publishing Ltd, 2008)Alfvén/ion-cyclotron waves have been observed in several regions of the magnetosphere. Parametric decays of finite amplitude Alfvén/ion- cyclotron waves in the presence of He+ ions and a mixed population of thermal and hot ...
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(2010)Nonlinear electrostatic instabilities have been shown to occur frequently and under very different conditions in plasma with two ion beams such as the fast solar wind. These instabilities can be triggered when the phase ...
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(John Wiley and Sons Inc., 1997)The binding of apomorphines (AM) to D1 and D2 dopamine receptors is analyzed through a formal quantum structure-activity relationship method. The calculations were carried out at the CNDO/2 level of the molecular orbital ...
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(John Wiley & Sons, Inc., 1996-03-22)The binding of apomorphines AM. to D1 and D2 dopamine receptors is analyzed through a formal quantum structure]activity relationship method. The calculations were carried out at the CNDOr2 level of the molecular orbital ...
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(ELSEVIER SCIENCE BV, 1991-03-07)In order to examine environmental effects, the interaction oí histamine (HA) with a model of the H2 receptor was analyzed using the self-consistent reaction field theory at the CNDO/21evel, in vacuo, and in the presence ...
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(ELSEVIER SCIENCE BV, 1991-03-07)In order to examine environmental effects, the interaction oí histamine (HA) with a model of the H2 receptor was analyzed using the self-consistent reaction field theory at the CNDO/21evel, in vacuo, and in the presence ...
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(Elsevier, 2014)Multilayer electrostatic assemblies described as {[FeTPyP(Crphen2Cl)4]8+/SiW12O404−}ni{[FeTPyP(Crphen2Cl)4]8+/SiW12O404−}ni and {[NiTPyP(Crphen2Cl)4]8+/SiW12O404−}ni{[NiTPyP(Crphen2Cl)4]8+/SiW12O404−}ni, where TPyP = ...
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(1992)The role of electrostatic ion-beam instabilities in the generation of the broadband electrostatic noise in the earth’s magnetotail and in electrostatic bursts in comets is discussed. The theory of electromagnetic ion-cyclotron ...
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(Sociedad Chilena de Química, 2003)Descriptor combinations, consisting of the electrotopological state (E-state) indexes of some skeletal groups, the first-order 'ҳ molecular connectivity index and the logarithm of the statistical factor, are employed to ...
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(PERGAMON-ELSEVIER SCIENCE LTD, 2006-06)Two- and three-compartment copper electrowinning (EW) cells based on reactive electrodialysis (RED) have been studied. The catholyte was cupric sulphate and the anolyte was ferrous sulphate, both dissolved in sulphuric ...
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(Universidad de Chile, 2015-12)Al transitar por la comuna de Pedro Aguirre Cerda resulta imposible no preguntarse por aquella inmensa infraestructura abandonada. Son los restos de lo que habría sido el hospital más moderno y grande de Latinoamérica; ...
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(Kluwer Academic Publishers, 1991)The elemental content of some soils of continental Chile and the Antarctic Peninsula are reported. The elements: Al, Cr, Mn, Fe, Co, Ni, Cu, Zn, Cd and Pb were analyzed. Trace elements differed among soils. The values ...
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(Nature Publishing Group, 2019)The snowpack is an important source of water for many Andean communities. Because of its importance, elemental and mineralogical composition analysis of the Andean snow is a worthwhile effort. In this study, we conducted ...
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(Air Pollution Control Association, 1984)In Chile, the State Public Health Office (Ministerio de Salud Pública) is responsible for pollution control and for air quality. This office has been monitoring only toxic gases and total suspended particulate matter.1.2 ...
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(KLUWER ACADEMIC PUBL, 2003-09)The fast changes in chemical and biological properties of many coastal and inland waters in the last decades reflect the pressure of man on the environment. The surface waters of the Antarctic Peninsula, located far from ...
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(2012)Background: The health effects of particulate air pollution are widely recognized and there is some evidence that the magnitude of these effects vary by particle component. We studied the effects of ambient fine particles ...
