Browsing by Title Facultad de Ciencias
Now showing items 7833-7852 of 8178
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(1985)Treatment of Xenopus laevis membranes with the 2',3'-dialdehyde of GTP (dial GTP) drastically inhibits their adenylyl cyclase activity. Optimal inhibition is obtained by treatment with 1 mM dial GTP for Ih at 32°C. Using ...
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(OPULUS PRESS UPPSALA AB, 2007-04)Questions: (1) What are the roles of regional climate and plant growth rate for seedling establishment during ENSO rainy pulses along the western coast of South America? (2) What is the water threshold for tree seedling ...
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(Kluwer Academic Publishers, 1988)The regeneration of canopy and subeanopy species in a mid-elevation, primary rain forest in the Coastal Range of Isla de Chiloé (42°30′S), in the cold-temperate region of Chile, was studied by comparing seedling and sapling ...
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(Springer, 2017)South America is one of the most vulnerable areas to stratospheric ozone depletion; consequently, an increased amount of UV radiation reaches the Earth's surface in this region. In this study, we analyzed the long-term ...
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(Universidad de Chile, 1983)
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(Blackwell Munksgaard, 1998)The new heterobimetallic complex [{LaEu(oda)3(H2O)3.-5H2O} n] (oda = -O2CCH2OCH2CO2 -) has been synthesized and structurally characterized. Three tridentate oda ligands are coordinated to the smaller EuIII cation, while ...
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(MDPI, 2017-04)In animals, hatching represents the transition point from a developing embryo to a free-living individual, the larva. This process is finely regulated by many endogenous and environmental factors and has been shown to be ...
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(Hindawi, 2013)Regulatory T cells are a specific subset of lymphocytes that suppress immune responses and play a crucial role in the maintenance of self-tolerance. They can be generated in the thymus as well as in the periphery through ...
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(Frontiers Media, 2021)Understanding physiological traits and ecological conditions that influence a species reliance on metabolic water is critical to creating accurate physiological models that can assess their ability to adapt to environmental ...
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(Verlag der Zeitschrift fur Naturforschung, 1999)Three triterpenoid quinonemethides, one triterpene (β-amyrin) and three phenolic compounds were isolated from the roots of Maytenus chubutensis (Speg.) Lourt., O'Don. et Sleum. and Maytenus disticha (Hook. f.) (Celastraceae). ...
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(Sociedade Brasileira de Quimica, 2009)The inhibition of the enzyme acetylcholinesterase is considered as a strategy for the treatment of Alzheimer's disease, senile dementia, ataxia, and myasthenia gravis. Three lanostane- and two cycloartane-type triterpenes, ...
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(Verlag der Zeitschrift fur Naturforschung, 2003)Four known tropane alkaloids were isolated from the leaves of the endemic Chilean plant Latua pubiflora (Solanaceae). For the first time; 3α-cinnamoyloxitropane and apoatropine are reported in this plant. Scopolamine and ...
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(1987)Three new tropanol dimers of mesaconic and itaconic acids and 3α-senecioyloxytropane, together with other known alkaloids, were isolated from Schizanthus grahamii. The structures of the new compounds were established by ...
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(1980)Tropine, a pair of diastereoisomeric hygrolines and two new tropane alkaloids; 3α-senecioyloxytropan-6β-ol and 6β-angeloyloxytropan-3α-ol, were isolated from roots of Schizanthus hookeri. © 1980.
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(Elsevier Ltd, 1996)Six new tropane alkaloids have been isolated from the leaves of the endemic Chilian plant Schizanthus litoralis (Solanaceae). The new structures include a new tropanol dimer of itaconic acid together with 6β- senecioylox ...
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(1988)From Schizanthus pinnatus Ruiz et Pav. we have isolated seven new tropan-3α,6β-diol diesters, schizanthines F (1), G (2), H (3), I (4), K. (8), L (9), and M (10), together with tropine, (-) -6β-angeloyloxytropan-3α-ol (5), ...
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(1998)Two new tropane alkaloids schizanthine Y and schizanthine Z have been isolated from the methanol extract of the leaves of Schizantus porrigens, in addition to the known compounds (-)-6β-angeloy-loxytropan-3α-ol and ...
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(2007)The alkaloid profile of the aerial parts of Schizanthus tricolor Grau et Gronbach was investigated by GC-MS. Seventeen alkaloids were detected and are reported in this species for the first time. They were identified by ...
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(Universidad de Concepcion, 2015)© 2015, Universidad de Concepcion. All rights reserved.Fish exhibit a wide diversity of feeding behaviors, sometimes associated with specifi c morphologies, which may refl ect adaptations to exploit the resources depending ...
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(European Assoc Aquatic Mammals, 2016)The contribution of prey species to the diet and their variation over time are poorly understood processes in the trophic ecology of Southeast Pacific humpback whales (Megaptera novaeangliae). The purpose of this study was ...
