Browsing by Title Artículos de revistas
Now showing items 3692-3711 of 4966
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(Elsevier, 2010)We herein report an experimental and theoretical study on the acetylation reaction of benzohydrazide derivatives towards p-nitrophenyl acetate (NPA). The kinetic data are consistent with a stepwise mechanism with the ...
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(PERGAMON-ELSEVIER SCIENCE LTD, 2004-07-26)The global and local electrophilicity indexes have been used to characterize the reactivity pattern of the C=C double bond towards nucleophilic addition reactions. A wide family of molecules including ketones, esters, ...
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(AMER CHEMICAL SOC, 2012)Photoisomerization of a protein bound chromophore is the basis of the light sensing and signaling responses of many photoreceptors. Z-to-E photoisomerization of the Pr Cph1 Delta 2 phytochrome has been investigated by ...
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(1994)Seven new diterpenoids, a labdane, three isopimarenes and three rearranged isopimarenes, have been isolated from the flowering tops of Satureja gilliesii. Their structures are based on their spectroscopic properties and, ...
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(American Chemical Society, 1986)Acid-catalyzed conversion of linalool into geraniol, nerol, and a-terpineol is slower than the corresponding reactions of geraniol and nerol, because the tertiary linalyl carbocation reverts to linalool rather than going ...
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(Magnolia Press, 2015)The hairy long-nosed armadillo, currently referred as Dasypus (Cryptophractus) pilosus, is an enigmatic species endemic to montane cloud forests and subparamo of Peruvian Andes. Its strikingly different external features, ...
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(ELSEVIER, 2006-07)This paper describes the main characteristics of the ion beam facility based on a 3.75 MeV Van de Graaff accelerator model KN3750 of HVE at the University of Chile. Recent setup improvements on three beam lines available, ...
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(Sociedad de Neurología, Psiquiatría y Neurocirugía, 1989)En este trabajo se analiza el conocimiento actual sobre los receptores o y PCP/NMDA. Se enfatiza que el haloperidol y muchos otros antipsicóticos similares presentan una afinidad relativamente alta por el receptor o. ...
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(Springer Netherlands, 2019)Land has traditionally been spared to protect biodiversity; however, this approach has not succeeded by itself and requires a complementary strategy in human-dominated landscapes: land-sharing. Human–wildlife conflicts are ...
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(American Society for Biochemistry and Molecular Biology, 2017)One central goal in molecular evolution is to pinpoint the mechanisms and evolutionary forces that cause an enzyme to change its substrate specificity; however, these processes remain largely unexplored. Using the glycolytic ...
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(2008)The genus Robsonella Adam, 1938 belongs to the family Octopodidae and can only be identified by some characters present in males. In this work the species Robsonella fontaniana is redescribed from morphological and ...
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(Academic Press, 2017)© 2016 Elsevier Ltd The systematics of elasmosaurids are not well resolved partially because of the scarcity of well-preserved skull material. Among Weddellian elasmosaurids, one exception to this is the holotype of ...
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(1991)N,N′-dithiobisamines, R2N-S-S-NR2, NR2N(CH3)2, N(CH2CH3)2, {A figure is presented}, {A figure is presented} or N(CH2-C6H5)2, are oxidized to SO2 by copper(II) salts with formation of copper(I) complexes, while from the ...
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(Taylor and Francis Ltd., 2001)Thermodynamic and dynamic properties of intercalation products of lithium into MoS2 are strongly determined by the coordination of lithium in the interlaminar spaces. Lithium redox potentials as well as lithium diffusion ...
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(Academic Press Inc., 2010)Glutamyl-tRNA synthetases (GluRS) provide Glu-tRNA for different processes including protein synthesis, glutamine transamidation and tetrapyrrole biosynthesis. Many organisms contain multiple GluRSs, but whether these ...
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(2005)Assessments of the effects of invertebrate herbivores on high-altitude plants have seldom taken into account both mutualistic and antagonistic interactions. To evaluate the effect of herbivores (antagonists) and pollinators ...
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(2009)The relationship between the nanoscale structure of vanadium pentoxide nanotubes and their ability to accommodate Li+ during intercalation/ deintercalation is explored. The nanotubes are synthesized using two different ...
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(BELGIAN MATHEMATICAL SOC TRIOMPHE, 2006-06)We prove two theorems of reduction of cocycles taking values in the group of diffeomorphisms of the circle. They generalize previous results obtained by the author concerning rigidity for smooth actions on the circle of ...
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(ACADEMIC PRESS INC ELSEVIER SCIENCE, 2008-12-12)The link between a new variant form of Creutzfeldt-Jakob disease (vCJD) and the consumption of prion contaminated cattle meat as well as recent findings showing that vCJD can be transmitted by blood transfusion have raised ...
