Repositorio Académico de la Universidad de Chile: Recent submissions
Now showing items 44441-44460 of 98852
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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 Ltd, 1996)Internal rotational barriers of aromatic carbonl compounds were calculated by means of semi-empirical quantum chemical methods such as AM1 and PM3. Rotational potential barriers in the AM1 approach (VAM1) follow the ...
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(2003)A reactivity picture developed within the spin-polarized density functional theory defined in the E{N, NS, v(r)} space is discussed. The reactivity model including changes in the total number of electrons N, the spin number ...
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(2002)Most relevant features of the fundamental and applied chemistry of MoS2 are reviewed highlighting the importance of the layered nature of the solid on the optical and catalytic properties of the compounds. Experimental and ...
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(2002)A new Rhenium (I) and Ruthenium(II) bimetallic polipyridilcarbonil complex and the corresponding monometallic precursor complexes were prepared. The compounds were characterized physically and spectroscopically (Elemental ...
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(Czech Academy of Sciences, 2003)Aphidius ervi Haliday is a parasitoid of natural populations of both Acyrthosiphon pisum (Harris) on alfalfa and Sitobion avenae (Fabricius) on wheat in Chile. In this study the performance of the aphid parasitoid on both ...
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(Elsevier, 2003)K+ channels in the inner ear regulate the secretion and homeostasis of K+, i.e. the flux of K+ ions required to ensure good mechanosensory transduction. We studied the expression and cellular localization of TWIK-1 and ...
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(2003)Emphasis was placed in the present work on a density functional theory and Hartree-Fock study of the internal rotation of the hydroxylic group of the enol form of guanine. This was achieved by monitoring the behavior of ...
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(2003)This paper describes the history of cephalopod fisheries in Chile over the past 40 years. Continuous monitoring of three species was undertaken between 1978 and 1999: Loligo gahi, Dosidicus gigas and Octopus mimus. Total ...
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(Elsevier, 2003)The global electrophilicity power, ω, of a series of dipoles and dipolarophiles commonly used in 1,3-dipolar cycloadditions may be conveniently classified within a unique relative scale. The effects of chemical substitution ...
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(Elsevier, 2003)The petrosal ganglion (PG) provides sensory innervation to the carotid sinus and carotid body through the carotid (sinus) nerve (CN). Application of either acetylcholine (ACh) or adenosine 5′-triphosphate (ATP) to the PG ...
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(2003)We analysed the residual resistivity data for more than 40 films of COSi2 reported by different groups using the available quantum theories of size effects in metal films. We found that the predictions of the model of ...
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(2003)We investigated the effects of forest patch size on the behaviour of birds feeding on the fower nectar of the proteaceous tree Embothrium coccineum J. R. et G. Forster, which is typically restricted to forest edges in ...
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Spatial organization of the pigeon tectorotundal pathway: An interdigitating topographic arrangement (2003)The retinotectofugal system is the main visual pathway projecting upon the telencephalon in birds and many other nonmammalian vertebrates. The ascending tectal projection arises exclusively from cells located in layer 13 ...
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Kinetics and mechanism of the reaction of a nitroxide radical (tempol) with a phenolic antioxidant (2003)In the absence of redox-active transition metal ions, the removal of Tempol by Trolox occurs by a simple bimolecular reaction that, most probably, involves a hydrogen transfer from phenol to nitroxide. The specific rate ...
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(2003)A large solid angle low-Z charged particle detector system was built in order to improve the quality of the identification and selection of evaporation channels for in-beam γ-spectroscopy measurements. The array consists ...
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(2003)Let F be a field of characteristic 2. Let ΩFn be the F-space of absolute differential forms over F. There is a homomorphism ℘: ΩFn → ΩFn/dΩFn-1 given by ℘ (x dx1/x1 ∧ ⋯ ∧ dxn/xn) = (x2-x)dx1/x1 ∧ ⋯ ∧ dxn/xn mod dΩFn-1. Let ...
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(2003)It has been suggested that salicylic acid (SA) is a signal in acquired resistance to pathogens in several plants. Also, it has been suggested that infestation of plants causes an increase in the activity of phenylalanine ...
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(Academic Press Inc., 2003)Frog oocyte glycogen synthase properties differ significantly under in vitro or in vivo conditions. The Kmapp for UDP-glucose in vivo was 1.4mM (in the presence or absence of glucose-6-P). The in vitro value was 6mM and ...
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(2003)An application of the topological electron localization function (ELF) analysis of free radical systems is presented. A separation of the ELF function into its α-spin and β-spin contributions has been performed. Methyl and ...
