Browsing by Issue Date Facultad de Ciencias
Now showing items 41-60 of 8181
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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)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 ...
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(Universidad de Chile, 1971)El objetivo primordial del presente trabajo fue el de obtener información general sobre el mecanismo de catálisis básica en reacciones de sustitución nucleofílica aromática. Esto se planeó en base al estudio de las reacciones ...
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(Universidad de Chile, 1971)
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(Universidad de Chile, 1971)
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(ELSEVIER, 1971-07-30)Trichocereus chilensis (Colla) Br. & R. is the only Chilean member of its genus figuring in the literature as having been examined for alkaloids, although previous reports are negative. Djerassi and coworkers1 found no ...
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(American Chemical Society, 1971-08-02)
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(ELSEVIER, 1972)Hojas y tallos de Solanum pinnatum Cav., cosechados cerca de Longotoma (Aconcagua), fueron procesados para estudiar su contenido de glicoalcaloides y sapogeninas neutras esteroidales. Se pudo aislar solasonina, solamargina, ...
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(Universidad de Chile., 1972)El problema dé impurezas magnéticas a bajas concentraciones ha motivado el presente trabajo sobre medición de resistividad eléctrica a temperaturas de He líquido. Estas mediciones servirán de complemento a las mediciones ...
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(Universidad de Chile., 1972)Este estudio, pretende introducir la técnica de Morris y Miller para el estudio de plagas del Tamarugo.
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(Universidad de Chile., 1972)Se estudio la adición competitiva de los radicales trifluormetilos a etileno y tetraflureotileno como fuentes radicales.
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(1972)In terms of the usual RKKY indirect exchange interaction, the spiral antiferromagnetic phase of Europium cannot be attributed to a 'nesting' of opposite faces of the tetracube portion of the Fermi surfaces. © 1972.
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(1972)The model recently proposed by Ramírez and Falicov is generalized by the incorporation of the spin-orbit splitting of the 4f shell. This generalization provides an understanding of the fractional valence and magnetic ...
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(1972)Changes in the fatty acid composition of egg‐yolk fat of hens fed diets with increasing fish meal content are studied by total fatty acid analysis. The fatty acid composition of the major lipid fractions in egg‐yolk fat ...
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(1972)Absorption spectral, circular dichroic spectral, and viscosity measurements indicate that the compact low-spin conformation characteristic of native cytochrome c is quantitatively recovered from its extended high-spin ...
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(1972)Water soluble enzymes obtained from Pinus radiata seedlings form two sesquiterpene alcohols from 2-14C mevalonic acid. They have been identified as 2,6-trans,trans-farnesol and 2-cis,6-trans-farnesol. The pyrophosphate of ...
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(1972)The problem of energy propagation through a one-dimensional open-ended finite chain is critically reexamined. Free end boundary conditions are imposed and quantum-field-theory operators, consistent with these boundary ...
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(1972)Ground and excited singlet state dipole electric π polarizabilities of a set of conjugated molecules are calculated. Second order perturbation theory is used in the Epstein–Nesbet and Möller–Plesset versions. Hückel and ...