Browsing by Issue Date Artículos de revistas
Now showing items 81-100 of 2801
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(Centro de Perfeccionamiento, Experimentación e Investigaciones Pedagógicas (Chile), 1979)No tiene
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(Centro de Perfeccionamiento, Experimentación e Investigaciones Pedagógicas (Chile), 1979)No tiene
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(Colegio de Químico Farmacéutico de Chile, 1979)Estas dos especies arbóreas tienen grandes proyecciones económicas aparte de las tradicionales de madera y derivados. En nuestro país hay grandes extensiones de terrenos plantados con Pino y con Eucaliptus globulus, no ...
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(Laser Pages Publ., 1979)Cationic micelles of hexadecyltrimethyl ammonium bromide (CTABr) increase the rate of dephosphorylation of p‐nitrophenyldiphenyl phosphate (PNPDPP) by aryloxide ions by factors of almost 104. The rate‐surfactant profiles ...
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(1979)Mössbauer spectroscopy as a function of temperature of Fe(II)(N,N′-dicyclohexyl-thiourea)6(ClO4)2(FeDCTU) shows the existence of two isomeric forms A and B which coexist in the temperature range 200 < T < 300 K. The relative ...
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(1979)Waste material obtained from the mechanical peeling of Antarctic Krill (Euphasia superba) was studied in order to evaluate its potential use as a raw material for the preparation of protein isolates. A dye‐binding method ...
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(1979)Six alkaloids have been isolated from Lycopodium magellanicum. These include the known alkaloids lycopodine, acetyldihydrolycopodine, lycodine, N-methyllycodine, acetylfawcettine and a new alkaloid, 5-dehydro-magellanine. ...
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(Springer-Verlag, 1979)Seventeen granitoid samples from batholiths in central Chile (33 °-34 ° S) have been analyzed for trace element content. The samples range in age from Paleozoic to Tertiary, and in rock type from quartz diorite to granite. ...
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(Sociedad Chilena de Química, 1980)El estudio químico y espectroscópico de los acil etoxicarbonil metilidentrifenilofosforanos I, revela que son compuestos extraordinariamente estables (1). En este trabajo se informa la síntesis de una serie de ílidos ...
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(Sociedad Chilena de Química, 1980)
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(Colegio de Químicos Farmacéuticos de Chile, 1980)La materia viva nos permite fijar un marco de referencia desde el punto de vista de las dimensiones. Las células y bacterias tienen tamaños que varían entre 0,2 y 10 micrones; los componentes celulares y los virus entre ...
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Composición del aceite esencial de limón de pica (Citrus aurantifolia) por cromatografía gas líquido (Universidad de Santiago de Chile. Dirección de Investigaciones Científicas y Tecnológicas, 1980)Se analizó por cromatografía gas-líquido los componentes del aceite esencial de limón de "pica" (Citrus aurantifolia) y común (Citrus limonum). Se detectaron 33 componentes en el caso de limón de "pica" y 30 para el limón ...
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(Universita degli Studi di Pisa, Istituto di Chimica Agraria, 1980)The application of wastewaters and sludge to agricultural land as a means of disposing of the wastes has been practiced for many decades. Many recent reports (DOWDY and LARSON, 1975; LUND et al., 1976; PAGE, 1974; SCHALSCHA ...
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(1980)Urease (EC 3.5.1.5) was purified from Spirulina maxima by ammonium sulfate precipitation, DEAE-cellulose chromatography and gel filtration on Sephadex G-200. The enzyme had maximum activity at pH 8.7, a Km for urea of 0.12 ...
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(1980)We describe a procedure for the preparation of various metal thiourea complexes of the type [M(CO)5L] in which M Cr or W and L TU (thiourea), TMTU (tetramethylthiourea), DptTU (NN′-di-p-totyl thiourea); DtBTU = (NN′-di-t-butyl ...
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(1980)The photochemistry of alkanals in dilute solutions and in the presence of olefins and hydrogen donors was analysed and the results obtained are discussed taking as reference the photochemical behaviour of the alkanones. ...
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(1980)Sex-related variations in the clinical effects of drugs may be observed. In an intensive prospective drug surveillance study of 1920 patients hospitalized at the Department of Medicine of the J.J. Aguirre Hospital in ...