Browsing by Title Artículos de revistas
Now showing items 4778-4797 of 4968
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(Sociedade Brasileira de Farmacognosia, 2017)© 2016 Sociedade Brasileira de Farmacognosia. High-resolution mass spectrometry is currently used to determine the mass of biologically active compounds in plants and UHPLC-Orbitrap is a relatively new technology that ...
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(MDPI, 2022)Himantormia lugubris is a Chilean native small lichen shrub growing in the Antarctica region. In this study, the metabolite fingerprinting and the antioxidant and enzyme inhibitory potential from this species and its four ...
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(2012)A metastable carbon nanotube with single, double, and triple bonds has been predicted from abinitio simulation. It results from the relaxation of an ideal carbon nanotube with chirality (2,1), without any potential barrier ...
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(SPECTROSCOPY LETTERS, 2005)Indoline-2-thione (BC), benzimidazole-2-thione (BN), benzoxazole-2-thione (BO), and benzothiazole-2-thione (BS) define an interesting series of aromatic compounds containing a NCS synthonic unit in a heterocyclic ring of ...
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(MARCEL DEKKER INC, 2001-01-12)Salicylideneaniline presents an electronic absorption band spectrum of complex patterns between 200 and 450 nm. However, we have successfully developed the electronic transition assignments of this molecular compound and ...
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(Universidad de Magallanes, 2020)
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UN MODELO HIDRODINÁMICO-BAROTRÓPICO PARA LOS FIORDOS AUSTRALES DE CHILE ENTRE LOS 41° S Y LOS 46° S (Comité Oceanográfico Nacional, 2008-07)Modelling coastal-estuarine ecosystems, characteristic of the southern fjords of Chile, should be based on hydrodynamic models accounting for the water circulation and its forcing. In this work we describe a barotropic, ...
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(2006)Metaphors are not just rhetorical devices, but also very powerful cognitive tools. We can check through learning experiments that they help us, not only to learn new ideas, but also that they provide very efficient means ...
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(2014)Se describe e ilustra una nueva especie, Bipinnula gabriel (Orchidaceae). Esta nueva especie habita en el tipo de bosque esclerófi lo costero de Chile Central, en la localidad de Putú, Constitución, Región del Maule. ...
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(2012)The present work presents a measurement uncertainty evaluation according to Guide to the Expression of Uncertainty in Measurement (GUM) of the concentration of the cations K + and Li + and anions NO 3 -2 and SO 4 -2 in ...
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(Springer, 2011-11-19)The present work presents a measurement uncertainty evaluation according to Guide to the Expression of Uncertainty in Measurement (GUM) of the concentration of the cations K? and Li? and anions NO3 -2 and SO4 -2 in ...
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(Elsevier B.V., 2011-09-01)A comparison of the ozone primary reference standard photometer serial number 45 (SRP45) against the National Institute of Standards and Technology (NIST) instruments, serial number 0 (SRP0) and 2 (SRP2), has been performed ...
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(1984)The indol alkaloid gramine inhibited photophosphorylation, Pi-ATP exchange reaction and proton gradient, and enhanced electron transport in spinach thylakoids with I50 around 0.2 m M.It thus behaves as a typical uncoupler ...
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(ELSEVIER, 2008-06-11)Binding of MgATP to an allosteric site of Escherichia coli phosphofructokinase-2 (Pfk-2) provoked inhibition and a dimer-tetramer (D-T) conversion of the enzyme. Successive deletions of up to 10 residues and point mutations ...
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(University of Chicago, 2007-09)Models of ecological communities are traditionally based on relationships between pairs of species, where the strengths of per capita interactions are fixed and independent of population abundance. A growing body of ...
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(Peking University Press, 2018)Chemical reactivity towards electron transfer is captured by the Fukui function. However, this is not well defined when the system or its ions have degenerate or pseudo-degenerate ground states. In such a case, the first-order ...
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(2007)Global and local indices based on the spin-polarized density functional theory (SP-DFT) have been used to rationalize the philicity power and spin polarization pattern of a family of singlet substituted phenylhalocarbenes, ...
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(Springer, 2015)The three-dimensional quantitative structure-activity relationship (3D QSAR) models have many applications, although the inherent complexity to understand the results coming from 3D-QSAR arises the necessity of new insights ...
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(Cooper Ornithological Soc., 2015)An understanding of the ecological factors determining bird species’ distributions is essential for making informed conservation decisions. These data are especially important for range-restricted species, such as the ...
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(Universite Paris-Sud, 2018)It has been proposed that NADP+ -specificity of isocitrate dehydrogenase (ICDH) evolved as an adaptation of microorganisms to grow on acetate as the sole source of carbon and energy. In Escherichia coli, changing the ...
