Browsing by Title Facultad de Ciencias
Now showing items 1000-1019 of 8177
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(Marcel Dekker Inc., 1996)The electronic absorption charge transfer bands in a series of para-substituted benzalketones are analyzed in order to stablish the role of the electron-donor substituent as well as the electronic properties of the molecular ...
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(1993)During the charge-transfer process in the excited state of aromatic carbonyl compounds, the local C-O net charge decreases as the polyene bridge length between the aromatic and the carbonyl systems is increased. Part of ...
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(2002)By means of 13C-NMR spectroscopy and ab initio molecular orbital theory calculations we have analyzed the bridge effect of the C=N bond and the long distance electronic effect of the electron-donor substituents (D: -NO2, ...
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(WILEY-LISS, DIV JOHN WILEY & SONS, 2006-12)An important body of evidence documents the differential expression of ion channels in brains, suggesting they are essential to endow particular brain structures with specific physiological properties. Because of their ...
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(ELSEVIER, 2005-01-17)The presence of guanaco (Lama guanicoe. Muller 1776. Camelidae) in forests of Nothofagus pumilio (Poepp. et Endl.) Krasser. (lenga) in Tierra del Fuego has been associated with browsing damage in the regeneration of these ...
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(Elsevier, 2020)A double cropping system for the grapevine (Vitis vinifera L) has been commercially adopted for use in regions where the tropical climate is characterized by high temperatures and small variations in daylength throughout ...
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(IOP Publisihing, 2015)We examine bulk and surface bound states in the continuum (BIC), that is, square-integrable, localized modes embedded in the linear spectral band of a discrete lattice including interactions to first and second nearest ...
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(ELSEVIER, 2008-11-17)We study localized modes on a single magnetic impurity positioned in the bulk or at the surface of a one-dimensional chain, in the presence of a magnetic field 8 acting at the impurity site. The strong on-site nonlinear ...
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(2009)We investigate theoretically the existence of bulk and surface discrete breathers in a one-dimensional magnetic metamaterial comprised of a periodic binary array of split-ring resonators; the two types of resonators used ...
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(2013)A succession of marine and continental strata on the southern flank of Cerro Cono in the Sierra Baguales, northeast of Torres del Paine, can be correlated with stratigraphic units exposed along the southern border of the ...
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(Universidad de Chile, 2013)En esta tesis analizaremos 1os parámetros de un código Goppa CD,G, para definir e imponer ciertas condiciones a los divisores D y G que harán a nuestros códigos óptimos al momento de corregir errores de transmisión. ...
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(Universidad de Chile, 2018-08)Actualmente, el uso de enzimas corresponde a un área de la biotecnología de gran crecimiento y desarrollo, la cual ha buscado dar solución a problemas de tipo industriales, biomédicos y domésticos; representando una solución ...
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(Universidad de Chile, 2007)
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(Universidad de Chile, 2002)
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(Universidad de Chile, 2022)La búsqueda de nuevos materiales de origen natural y con potencial de aplicabilidad ha sido tema de gran desarrollo en los últimos años. Dentro de los organismos que producen estos materiales los insectos han sido ampliamente ...
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(Universisdad de Chile, 2006)La tecnología de microarreglos de ADN se ha convertido en una poderosa herramienta para monitoria la expresión genética en los organismos vivos, pues permite analizar cientos o miles de genes en forma simultanea con un ...
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(Universisdad de Chile, 2007)La minería del cobre actualmente en Chile constituye la mayor fuente de ingreso a las arcas fiscales. El desarrollo de nuevas tecnologías que permitan el avance sostenido de esta actividad contribuirá a mantener el lugar ...
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(Universisdad de Chile, 2010)EI genoma del salmón acumula cuatro rondas de duplicación genomica en su historia evolutiva: un evento especifico de salmones, otro especifico del Linaje de los teleosteos y dos rondas ocurridas en vertebrados hace 600 ...