Browsing by Issue Date Facultad de Ciencias
Now showing items 21-40 of 8178
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(Universidad de Chile, 1968)
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Tracer diffusion and activity coefficients of counterions in aqueous solutions of polyelectrolytes (1969)Tracer diffusion coefficients of Ag+ in silver polystyrenesulfonate and counterion activity coefficients of sodium and silver polystyrenesulfonates have been determined at different concentrations. The results have been ...
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(1969)THE effect of temperature on the resting potential has been studied in a number of different preparations1-3, and has attracted considerable theoretical interest. In the axons of the squid Loligo forbesi, the resting ...
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(Universidad de Chile., 1969)Se estudia con cierto detalle algunos aspectos de la formulación variacional del problema del movimiento, en especial se analiza cuidadosamente la cuestión de la independencia de las funciones que aparecen en la integral ...
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(Universidad de Chile, 1969)
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(Universidad de Chile, 1969)Se estudia el intercambio de excitación dependiente del tiempo entre dos átomos, separados por una distancia.grande, comparada con sus respectivos radios de Bohr.
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(Universidad de Chile, 1969)
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(1970)WE wish to report a new method with which we have been able to measure the sodium and potassium conductance changes postulated by Hodgkin and Huxley1 in the course of a single action potential. To measure the membrane ...
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(1970)The two major methionyl-tRNA species from wheat embryos and E. coli have been studied as regards their capacity to form a ternary complex with GTP and the ribosomal binding enzyme from both sources. Methionyl-tRNA1 from ...
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(Elsevier , Science Ltd., 1970)Sophora tetraptera, sensu R,eiche, is the scientific name assigned to a southem Chilean tree known by the names pelú and pilopilo, which closely resembles the New Zealand species S. tetraptera J. Mill. and S. microphylla ...
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(1970)The adsorption of bovine serum albumin (BSA) at an air/water interface was shown to be reversible and the equilibrium adsorption isotherm measured for concentrations between 0.001% and 10.0%. The desorption of BSA into a ...
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(Universidad de Chile, 1970)
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(ELSEVIER, 1970-03-17)Sophora tetraptera sensu Reiehe seeds were examined for alkaloids. Cytisine, methyleytisine and matrine were isolated, and a fourth alkaloid was deteeted by TLC. The relative amounts of the three major alkaloids support ...
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(Universidad de Chile., 1971)Estudio de la resistividad eléctrica de materiales ferromagnéticos a bajas temperaturas.
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(Universidad de Chile., 1971)El Laboratorio de Física del estado sólido, concentra su esfuerzo en el área de superconductividad y magnetismo. La infraestructura básica del laboratorio es el Criostato pues prácticamente todas las mediciones que se ...
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(1971)The problem of spatial variation of the order parameter in the neighborhood of a nonmagnetic impurity with broadened d levels is investigated near the superconducting critical temperature. It is shown that, due to resonance ...
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(1971)This paper discusses, first, the selective pressures which led to the two basic types of animal eyes, compound vs. camera eyes. Secondly, it considers what is the significance of the apparent similarity of the wiring ...
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(Comite de Investigaciones Científicas y Tecnológicas de la Universidad Técnica del Estado, 1971)Se separaron seis fracciones químicamente diferentes de hojas de Solanum malacoxylon Sendtner por extracción con solventes selectivos, y se ensayó la acción de estas fracciones sobre el metabolismode calcio y fósforo ...
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(1971)The following glycolytic enzyme activities were demonstrated in membrane fractions isolated from squid retinal nerve: phosphoglyceric kinase, pyruvic kinase, glyceraldehyde-3-phosphate dehydrogenase, aldolase, glucose-6-phosphate ...