Browsing by Title Facultad de Ciencias
Now showing items 3729-3748 of 8178
-
(Universidad de Chile, 2001)Life-history attributes could be used to predict species responses to habitat fragmentation or sensitivity. We compared the incidence and sensitivity to fragmentation of four understory birds (Rhinocryptidae family). ...
-
(2003)La fragmentación del hábitat puede incluir la pérdida de especies desde los fragmentos de bosque remanente o cambios en la abundancia de las especies entre hábitats que difieren en área, estructura o en las caracterfsticas ...
-
(WILEY-BLACKWELL, 2009-03)A highly conserved spatio-temporal pattern of cartilage formation reveals that the digits of the bird wing develop from positions that become digits 2, 3, and 4 in other amniotes. However, the morphology of the digits ...
-
(Society of Biology of Chile, 2003)One of the most eminent neuroscientists recently passed away in Paris. Professor Francisco Varela was a scholar that approached science with a remarkably broad and integrative perspective, deeply contributing to a diversity ...
-
(Universidad de Chile, 2021-05)Los coccinélidos (Coleoptera: Coccinellidae) son reconocidos por su importancia como agentes de control biológico. En Chile son abundantes y diversos en alfalfa (Medicago sativa L.), cultivo que tiene como plagas más ...
-
Free energies of transfer of anions from water to cationic micelles from ionic exchange measurements (1981)Ionic exchanges for several anions in hexadecyltrimethylammonium (CTA) have been measured by ultrafiltration and by the shift in the concentration of ferric thiocyanate complex by CTA addition. The results are compared ...
-
(Royal Soc Chemistry, 1991)As a step to increasing the reliability of the calculation of free energies underlying ion binding and transport in protein channels, free energy perturbation simulations have been performed for the binding of alkali-metal ...
-
(1990)We present a theoretical treatment for the Helmholtz free energy of an arbitrary discrete charge distribution in a central prolate or oblate spheroidal cavity surrounded by two and three concentric dielectric continua of ...
-
(Kluwer Academic Publishers, 1992)Experimental values of the free energies of cation binding to the cyclic depsipeptide molecule, valinomycin, obtained from Pedersen-type salt extraction measurements, provide data against which it is possible to test the ...
-
(Elsevier, 2020)The enhanced green fluorescent protein (eGFP) is one of the most employed variants of fluorescent proteins. Nonetheless little is known about the oxidative modifications that this protein can undergo in the cellular ...
-
(American Chemical Society, 1989-09-28)We present a theoretical treatment for the Helmholtz free energy of an arbitrary discrete charge distribution in a central prolate or oblate spheroidal cavity surrounded by two and three concentric dielectric continua of ...
-
(Public Library of Science, 2017)Chimerism occurs when two genetically distinct conspecific individuals fuse together generating a single entity. Coalescence and chimerism in red seaweeds has been positively related to an increase in body size, and the ...
-
(2007)Fisheries of the Altiplano, dating from 1500 to 2000 BC, are active in the Andean inter-montane plateau that extends from Ancash, Peru, to Antofagasta, Chile, at altitudes above 3600 m. The ancient and remote nature of ...
-
(Elsevier, 2020)We describe remains of freshwater turtles from the Upper Cretaceous of Chilean Patagonia. The fossils, which comprise isolated shell fragments and incomplete appendicular bones, were recovered from meandering fluvial ...
-
(1991)From the aerial parts of Haplopappus pulchellus two new labdanes and six friedolabdanes were isolated while H. arbutoides afforded in addition to known labdanes five new ones, two clerodanes and a cyperone derivative. ...
-
(BioMed Central Ltd., 2016)© 2016 Mardones et al. Background: In the adult hippocampus new neurons are continuously generated from neural stem cells (NSCs) present at the subgranular zone of the dentate gyrus. This process is controlled by Wnt ...
-
(2013)The Wnt signaling pathway plays important roles during different stages of neuronal development, including neuronal polarization and dendritic and axonal outgrowth. However, little is known about the identity of the ...
-
(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 ...
-
(Taylor and Francis Inc., 2001)This review is intended to illustrate how live frog oocytes may be advantageously used to address the study of some problems of in vivo glucose metabolism. Glucose microinjected into the cells is preferentially committed ...
-
(Elsevier, 2018-08)Historically, ROS have been considered toxic molecules, especially when their intracellular concentration reaches high values. However, physiological levels of ROS support crucial cellular processes, acting as second ...