Browsing by Title Facultad de Ciencias
Now showing items 92-111 of 8178
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(Elsevier, 2018)This paper presents the detailed description of a remarkable skull and partial postcranial skeleton of a very juvenile elasmosaurid referred to Tuarangisaurus keyesi (CD 427), from the upper Campanian-lower Maastrichtian ...
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(2012)A local measure of the electrophilicity has been recently proposed to analyze the chemical reactivity of several kinds of molecules. In this work a theoretical rationalization of the local extension is proposed following ...
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(ELSEVIER GMBH, 2009-03-19)Assessingsmallmammaldiversityisacommonprocedure,whichusuallyemployswidespreadstandardtechniques, for gatheringinformationforawiderangeofstudies.Traditionalmethods,however,maybebiasedagainstcapturing arborealmarsupials,suchas ...
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(American Institute of Physics, 2021)A simple model for the stochastic evolution of defects in a material under irradiation is presented. Using the master-equation formalism, we derive an expression for the average number of defects in terms of the power flux ...
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(1995)The variation of the charge capacity of a double‐layer 1T–TiS2 model system upon increasing intercalation with lithium is examined at a molecular level. The charge capacity is modeled through the global hardness index of ...
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(John Wiley & Sons, 1994-10-14)The variation of the charge capacity of a double-layer 1T-TiS2 model system upon increasing intercalation with Lithium is examined at a molecular level. The charge capacity is modeled through the global hardness index of ...
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(1973)Energy gaps near the Fermi surface arising from magnetic Brillouin zone effects must be taken into account in order to understand the antiferromagnetism of europium metal. © 1973 Pergamon Press.
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(1995)Based upon ab initio Hartree-Fock calculations we propose a model potential for simplifying the study of the internal rotation of neighbouring rings. The quality of the proposed analytic potential was numerically verified ...
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(John Wiley and Sons Inc., 1998)Using some relationships derived from the density functional version of the virial theorem, an approximated kinetic energy density is constructed. This is used to implement a modified version of the electron localization ...
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(Portland Press Ltd, 1997)Strains of Escherichia coli bearing different forms of phosphofructokinase were used to assess the occurrence of futile cycling in cell resuspensions supplied with glycerol as gluconeogenic carbon source. A model was used ...
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(IANDS, 1993)This paper describes a possible near-death experience (NDE) among the Mapuche people of Chile. The individual reporting the experience was in a cataleptic-like state for two days, the experience itself occurring at ...
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(IANDS, 2006)1present in this paper a tale from Pu Songling's "Strange Stories from Liaozhai's Studio." This story seems to contain the following key elements ofa near-death experience: the life review, travel through a spiritual world, ...
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(2009)This study characterizes the structure of a plant-pollinator network in a temperate rain forest of Chiloé Island, southern Chile, where woody species are strongly dependent on biotic pollinators, and analyzes its robustness ...
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(Elsevier, 2011)Many organisms exhibit ontogenetic shifts in their diet and habitat use, which often exert a large influence on the structure and expected dynamics of food webs and ecological communities. Nevertheless, reliable methods ...
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(Human Sciences Press, 1989)The authors present a neurobiological model for near-death experiences (NDEs) in an attempt to correlate the biological and psychological domains. This model is based on temporal lobe dysfunction, hypoxia/ischemia, stress, ...
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(IANDS, 1994-07-25)In this article we propose a scientific approach to explain the fact that some near-death experiencers (NDErs) are able to recollect and verbalize real events occurring in the environment during the experience. Our model ...
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(1987)A new, rapid, and simple method for preparing long-chain alkyltrimethylammonium (A1TA+X-) or long-chain alkylpyridinium (A1Py+X-) salts (X- = F-, Cl-, Br-, NO3-, SO42-, PO42-, car{ballot box}ylic anions, etc.) is presented. ...
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(Elsevier, 2020)A new approach to find exact solutions to one-dimensional quantum mechanical systems is devised. The scheme is based on the introduction of a potential function for the wavefunction, and the equation it satisfies. We recover ...
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(2011)A new azorellane diterpenoid has been isolated and identified from the aerial parts of Azorella madreporica Clos. The structure of 1 was established by one- and two-dimensional NMR techniques. © 2011 Taylor & Francis.
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(2012)In this paper, a new type of mathematical model to represent certain processes with impulsive dynamic behavior is introduced. The main assumption is that the next impulse time is determined by three fundamental elements: ...
