Browsing by Title Artículos de revistas
Now showing items 2072-2091 of 4968
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(Elsevier Ltd, 1997)Discrete nonautonomous nonlinear systems possessing (h, k)-trichotomies are considered. We specialize to the case of solutions moving inside - and in a neighborhood of - an invariant manifold of a special kind, which we ...
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(PERGAMON-ELSEVIER SCIENCE LTD, 2011-08)We use fixed-point theory to obtain h-asymptotic stability results about the zero solution of nonlinear differential equations with functional delay. Neither boundedness of the deviations nor a fixed sign on the coefficients ...
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(SPRINGER, 2008-06)Hydrogen cyanamide (HC) is widely used to induce the breakage of endodormancy (ED) in grape and other deciduous fruit crop, though its mechanism of action is poorly understood. Applications of HC to grapevine buds ...
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(2013)The Torrent Duck (Merganetta armata) inhabits the torrential rivers of the Andean mountains. As part of a long-term study, two rivers important for hydroelectric production were surveyed in Central Chile. Monthly indices ...
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(2004)Native forests in Chile have been replaced by exotic plantations, generating a mosaic of forest fragments immersed in a matrix of plantations and farms. This landscape change could affect habitat availability for native ...
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(Sociedad Chilena de Neurología, Psiquiatría y Neurocirugía, 1987)In this work we flIIIllyze the problem fo human conciousness from a monist point of view, including the actual knowledge in neurobiology. Three questions are discussed: 1. Can we localize human conciousness in certain ...
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(BLACKWELL, 2008-05)The existence of latitudinal gradients in species richness and their abundance is known for many free living organisms but few cases have been reported for parasitic diseases. In addition, asymmetries between the Northern ...
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(OXFORD UNIV PRESS, 2013-09)We present solutions for Hall equilibria applicable to neutron star crusts. Such magnetic configurations satisfy a Grad–Shafranov-type equation, which is solved analytically and numerically. The solutions presented cover ...
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(SciELO Agencia Nacional de Investigacion y Desarrollo (ANID), 2020)
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(American Chemical Society and American Society of Pharmacognosy, 2000-03-15)(S)-(+)-Boldine (1) was brominated, chlorinated, and iodinated using molecular bromine in acetic acid or N-halosuccinimides in trifluoroacetic acid. Initial halogenation occurs at C-3, followed (in the cases of chlorine ...
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(Elsevier Science Ltd., 2002-12-19)Cytisine (cy) is a potent and competitive partial agonist at α4 subunit-containing nicotinic acetylcholine (nACh) receptors while at homomeric α7-nACh receptors it behaves as a full agonist with a relatively lower potency. ...
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(ELsevier Science, Inc., 1998-12-18)The selectivity of 3-nitrosoboldine and different halogenated derivatives of boldine (3-bromoboldine, 3,8-dibromoboldine and 3-chloroboldine) for ai - adrenoceptor subtypes was studied by examining [3H]-prazosin ...
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(1993)Pacifenol, a halogenated sesquiterpene was isolated from Laurencia claviformis. The effects of pacifenol and two derivatives on survival and feeding behaviour of the aphid Schizaphis graminum were studied. Toxicity of ...
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(IOP, 2015)Maximization of the path information entropy is a clear prescription for constructing models in non-equilibrium statistical mechanics. Here it is shown that, following this prescription under the assumption of arbitrary ...
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(1976)We give noncanonical (without string) and canonical (with string) Hamiltonian formulations for a system of classical electric and magnetic charges. We do not introduce potentials in either case. This allows us to see very ...
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(ELSEVIER, 2006-02-15)In this Letter, the mathematical expressions corresponding to the kernel, local and global spin softness have been derived, and their relationship with other indices have been explored. Introducing various spin kernels, ...
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(1995)A theoretical study of the conformational dependence upon internal rotation of molecular hardness and its correlation with the torsional potential energy is performed for two representative molecules that present rotational ...
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(Estonian Biocentre and Tartu University, Gyaneshwer Chaubey, 2014)The West Antarctic Peninsula (WAP) has been suffering an increase in its atmospheric temperature during the last 50 years, mainly associated with global warming. This increment of temperature trend associated with changes ...
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Head morphometry of Orestias (Cyprinodontiformes). Response to extreme Southern Altiplano systems? (Springer, 2020)The distribution ofOrestias(Cypriniforms) species in the southern western Altiplano (17oS-22oS) is allopatric; the seven species described inhabit different freshwater systems with extreme climatic characteristics and ...
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(Elsevier Science, 2016)Background: Although evidence from Latin America and the Caribbean suggests that depression can be effectively treated in primary care settings, depression management remains unevenly performed. This systematic review ...
