Browsing by Title Facultad de Ciencias
Now showing items 3938-3957 of 8177
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(1993)We present a comparative study of Escherichia coli with normal and increased amounts of fructose-1,6-bisphosphate aldolase. Most experiments employed a resting cell system involving a high cell density (so as to obtain the ...
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(Springer, 2012)The heterologous secretion of xylanase B from Penicillium purpurogenum using glucose as inducer was performed in Aspergillus nidulans. For this purpose, plasmid pEVXB, containing the xylanase B cDNA (including its own ...
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(Universidad de Chile, 1995)Los extractos proteicos provenientes de plántulas de centeno presentan una actividad glucosiltransferasica (Hx-GT) capaz de reconocer a los ácidos hidroxamicos cíclicos presentes en las plantas como sustrato. La actividad ...
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(BioMed Central Ltd., 2013-02-05)Background: FtsZ is an essential cell division protein, which localizes at the middle of the bacterial cell to mediate cytokinesis. In vitro, FtsZ polymerizes and induces GTPase activity through longitudinal interactions ...
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(Frontiers Media, 2022)Disruption of the inhibitory control provided by the glycinergic system is one of the major mechanisms underlying chronic pain. In line with this concept, recent studies have provided robust proof that pharmacological ...
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(Pergamon-Elsevier, 1987)Water deficit increased susceptibility of barley to the aphid Schizaphis graminum. Proline and glycine-betaine accumulated in the stressed plants. These compounds were incorporated into artificial diets to test their effects ...
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(1987)The gramine content in different barley cultivars was not changed under water stress. Proline and glycine-betaine increased as plant water potential decreased. The population growth rate of the aphids Schizaphis graminum ...
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(Elsevier B.V., 2007-01-22)Abstract Besides the classic direct route, frog oocytes incorporate glucosyl units into glycogen by the so-called indirect pathway. The operation of both pathways depends on glucose availability. Below 0.5 mM glucose ...
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(Portland Press Ltd, 1996)Glycogen is the main end product of glucose metabolism in amphibian oocytes. However, in the first few minutes after [U-14C]glucose microinjection most of the label is found in lactate. The burst of lactate production and ...
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(1994)It is generally accepted that in frog full-grown oocytes glycolysis is absent and that carbon metabolic flux is largely directed to glycogen synthesis. Use of an anion exchange pellicular resin for analytical resolution ...
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(Elsevier, 2012)Cyclin-dependent kinase 5 (Cdk5) is a proline-directed serine/threonine kinase that is mostly active in the nervous system, where it regulates several processes such as neuronal migration, actin and microtubule dynamics, axonal ...
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(2009)Block copolymers have been extensively used in the synthesis of many types of nanoparticles, where generally are considered as stabilizer and protective agent. In this work a double function of the biodegradable triblock ...
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(Springer, 2020)Wind, a major source of environmental noise, forces invertebrates that communicate with plant-borne vibrations to adjust their signaling when communicating in windy conditions. However, the strategies that animals use to ...
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(Elsevier, 2015)Identification of vacancies in atomic structures plays a crucial role in the characterization of a material, from structural to dynamical properties. In this work we introduce a computationally improved vacancy recognition ...
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(Universisdad de Chile, 2013)Los bosques del sur de Sudamérica presentan interesante anomalías biogeograficas, incluyendo su gradiente latitudinal de riqueza de especies, con concentración de especies leñosas en una estrecha banda latitudinal, y un ...
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(Universidad de Chile, 2013)
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(Universidad de Chile, 2006)En este tesis se abordaron las siguientes preguntas: ¿son las especies de plantas anuales y perennes de un mismo género igualmente especializados en sus sistemas de polinización? ¿Plantas más especializadas tienen diferente ...
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(Planeta, 2023)Lejos de lo que suponemos, las matemáticas no son una disciplina rígida, sino que conecta distintas áreas de nuestras vidas. En la Antigua Grecia, por ejemplo, y luego de varias observaciones, Pitágoras estableció que había ...
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(Universidad de Chile, 1992)En esta tesis propongo un modelo gr¿fico que explora el efecto de la distancia entre las plantas madres sobre el espaciamiento entre las plántulas y sus madres, en presencia y en ausencia de granivoria. El supuesto ...
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(1995)Comparative studies of granivory intensity across different arid and semi‐and regions of the world have assumed homogeneity of conditions over large geographical areas, despite the existence of evident heterogeneities at ...