Browsing by Title Facultad de Ciencias
Now showing items 3749-3768 of 8178
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(BMC, 2020)Background With more than 30,000 species, teleosts comprise about half of today's living vertebrates, enriched with a wide set of adaptations to all aquatic systems. Their evolution was marked by modifications of their ...
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(2001)We calculate thermodynamic properties of a disordered model insulator, starting from the ideal simple-cubic lattice (g = 0) and increasing the disorder parameter g to » 1/2. As in the earlier Einstein and Debye approximations, ...
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(2011)The nature of life has been a topic of interest from the earliest of times, and efforts to explain it in mechanistic terms date at least from the 18th century. However, the impressive development of molecular biology since ...
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(ELSEVIER SCI LTD, 2005-12)S-Nicotine, the principal psychoactive constituent of Nicotiana tabacum, underpins addiction to tobacco smoking. Although tobacco consumption is a leading cause of death worldwide, nicotine itself is also proposed to have ...
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(Frontiers Media, 2021)Commerson's dolphins (Cephalorhynchus commersonii) are separated into the subspecies C. c. commersonii, found along southern South America (SA) and the Falkland Islands/Islas Malvinas (FI/IM), and C. c. kerguelenensis, ...
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(Universidad de Chile, 2022)In the case of astronomical observations, it is useful to work with new methods that are effective to complement the characterization of systems for which only limi ted information is available. The generality of the ...
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(Universidad de Chile, 1985)
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(Sociedad Chilena de Quimica, 2001)HOMO and LUMO energies from a 6-31G** full geometry optimization of a series of 7 cyclic hydroxamic acid derivatives were calculated. According to the LUMO energy, the molecules can be classified as hard electrophiles ...
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(Universidad de Chile, 1985)
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(1995)The characterization of fructose-1, 6-bisphosphatase in stage VI oocytes from the frog Caudiverbera caudiverbera, as well as the in vivo activity, is reported. The enzyme has a subunit molecular weight of approximately 43, ...
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(Nature Publishing Group, 2017)© 2017 The Author(s). Plant-animal interactions are strong drivers of phenotypic evolution. However, the extent to which anthropogenic habitat transformation creates new selective scenarios for plant-animal interactions ...
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(2010)Habitat degradation and fragmentation are expected to reduce seed dispersal rates by reducing fruit availability as well as the movement and abundance of frugivores. These deleterious impacts may also interact with each ...
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(2010)Although Rhamnaceae are distributed worldwide today, the former hypothesis for its Laurasian origins may need to be reconsidered in view of recently discovered fossils from the Guaduas Formation of central Colombia (~68 ...
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(1986)A full normal coordinate analysis for the Cr(CN)3− 6 ion, in octahedral symmetry, has been carried out on the basis of new experimental data, using three different force fields. Consistent sets of force constants have been ...
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(JOURNAL OF VISUALIZED EXPERIMENTS, 2014)Insufficient vascularization is considered to be one of the main factors limiting the clinical success of tissue-engineered constructs. In order to evaluate new strategies that aim at improving vascularization, reliable ...
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(Universidad de Chile, 1987)
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(Universisdad de Chile, 2009)La división celular asimétrica es un mecanismo conservado por el cual se determinan distintos celulares en el trascurso del desarrollo de organismos multicelulares. estudios en la neurogenesis de Drosophila han demostrado ...
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(Universidad de Chile, 2019-10)El río Lauca se encuentra ubicado entre las latitudes 18º7’18’’ y 18º48’36’’S y longitudes 69º0’5’’ y 69º29’27’’O, en la Región de Arica y Parinacota, desde los 3900 a 4500 m s.n.m.. Desde su origen y durante el transcurso ...
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(Universidad de Chile, 1968)