Browsing by Title Facultad de Ciencias
Now showing items 6263-6282 of 8176
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(Universidad de Chile, 2009)
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(Universidad de Chile, 2019-11)La erosión hídrica es un fenómeno natural que provoca el transporte del suelo y la perdida natural del mismo, sin embargo si esta pérdida de suelo no es compensada por medio de su regeneración, las características de ...
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(American Chemical Society, 1984)SCF-CNDO/2 calculations, including the continuum solvent effects via an extended version of the generalized Born formula, have been performed for H30+.-.(H20),..a-ndO H(-H 20),..-H.3O0Ht--s p.ec ies (n = 0, 1,2). The ...
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(American Chemical Society, 1983-07-19)SCF-CNDO/2 calculations, including the continuum solvent effects via an extended version of the generalized Born formula, have been performed for H30+··.(H20) •.•. OH- and (H20) •... Hp+ ... OH- species (n = 0,1,2). The ...
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(Elsevier, 2008-10-23)Experimental observations show that for the gas phase isomerization of protonated molecules, a third body can transport a proton from a high-energy site to a lower energy-site of the substrate, thereby catalyzing the ...
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(SPRINGER, 2006-08)Host-guest supramolecular complexes are of special interest for understanding the chemistry in low dimensional spaces. The molecular recognition involved in the formation of such structures sometimes may be a relevant model ...
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(2006)Host-guest supramolecular complexes are of special interest for understanding the chemistry in low dimensional spaces. The molecular recognition involved in the formation of such structures sometimes may be a relevant model ...
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(Society for Conservation Biology, 2013)La Convención sobre Diversidad Biológica (CDB) espera que las plantaciones forestales contribuyan a la conservación de la biodiversidad. Un sotobosque bien desarrollado en plantaciones forestales puede servir como hábitat ...
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(2013)How much do ecosystems contribute to the wellbeing of rural populations in developing nations? In this article we provide an answer to this question through an eco-social study of two provisioning ecosystem services (wood ...
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(SPRINGER HEIDELBERG, 2008-03)The bronchial tree of most mammalian lungs is a good example of an efficient distribution system whose geometry and dimensions of branched structures are important factors in determining the efficiency of respiration. Small ...
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Proyección futura del Hotspot de Biodiversidad de Chile “Chilean Winter Rainfall-Valdivian Forest” (Universidad de Chile, 2023)El cambio climático antropogénico es uno de los principales precursores de la pérdida en biodiversidad, provocando cambios en la composición de las comunidades naturales. En cuanto a la distribución de las especies en el ...
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Prólogo (2006-11)
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(Universisdad de Chile, 2010)El mal de Alzheimer es una enfermedad neurovegetativa del cerebro, es la causa mas frecuente de demencia que afecta a los adultos mayores. En etapas avanzadas la enfermedad de Alzheimer (EA) produce la muerte masiva de ...
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(ELSEVIER, 2010)The existence and uniqueness of pseudo-almost periodic solutions to general neutral integral equations with deviations are obtained. For this, pseudo-almost periodic functions in two variables are considered. The results ...
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(John Wiley and Sons Ltd, 2017)© 2017 John Wiley & Sons, Ltd. Using the existence of integrable bi-almost-periodic Green functions of linear homogeneous differential equations and the contraction fixed point, we are able to prove the existence of almost ...
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(Universidad de Chile, 2017)in a recet paper by M. Manteoiu and M. Ruzhansky a global pseudo-diffential calculus has been debeloped for unimodular groups of type I. In the present thesis we generalize the main results to ararbitrary locally compact ...
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(Elsevier, 2015)We study the long-time wave transport in correlated and uncorrelated disordered 2D arrays. When a separation of dimensions is applied to the model, we find that the previously predicted 1D random dimer phenomenology also ...
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(1987)The ground state potential energy curves of alkaline-earth monohydride ions have been investigated. A pseudopotential formalism including a corepolarization potential has been used. For the valence correlation energy a ...
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(2012)Paralytic shellfish poisoning (PSP) toxins are a group of naturally occurring neurotoxic alkaloids produced among several genera of primarily freshwater cyanobacteria and marine dinoflagellates. Although saxitoxin (STX) ...