Browsing by Issue Date Artículos de revistas
Now showing items 141-160 of 2801
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(Pergamon Press Ltd, 1983)In fertilized and unfertilized plots of ten Chilean allophanic soils the fraction of total-P associated with organic matter and the organic carbon content were determined. Cultivation with P fertilization for 40 yr or ...
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(Soil Science Society of America, 1984)Extraction of Cd,Cu, Ni and Zn by BaCl(Ba(ClO-4)2 solutions from El Recuerdo(Vertisol) and Puerto Octay (Andept)soils was used to measure the amounts of metals remaining extractable during a 60-d storage period under air-dry ...
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(Cêntre d'Etude des Plantes Médicinales, 1984)Two sesquiterpene lactones have been isolated from the stems, leaves and flowers of Centaurea chilensis Hook. et Arn.: dehydrocostus lactone and 8 α-hydroxydehydrocostus lactone, and two steroids: β-sitosterol and stigmasterol. ...
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(Air Pollution Control Association, 1984)In Chile, the State Public Health Office (Ministerio de Salud Pública) is responsible for pollution control and for air quality. This office has been monitoring only toxic gases and total suspended particulate matter.1.2 ...
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(Springer-Verlag, 1984)Two outer membrane proteins of Salmonella typhi T y 2 were extensively co-purified. According to their migration in dodecyl sulfate/polyacrylamide gel electrophoresis and solubility characteristics, these proteins are ...
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(Sociedad Chilena de Química, 1984)Several methods recommended for soil analysis using acid digestion were tested for the total analysis of minor and trace elements of the clay fraction. The proposed method using mixtures of HClO4/HF was adequate to dissolve ...
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(Sociedad Chilena de Química, 1984)En este trabajo se entrega una visión general del trabajo con material particulado suspendido en el aire. Sobre la base de los resultados obtenidos en el Grupo de Contaminación Atmosférica de la Facultad de Ciencias Básicas ...
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Polarographic behaviour and determination of nitrofurantoin, chloramphenicol and related compounds (1984)The polarographic behaviour of nitrofurantoin and chloramphenicol have been studied in pyridine - formic acid buffer and tetramethylammonium chloride solution at pH 4.3. The E<inf>1/2</inf> versus pH and iym ...
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(1984)Adverse drug reactions (ADRs) may be more frequent in patients who present some diseases. By means of an intensive prospective drug surveillance work, 492 patients with heart diseases, hospitalized at the Department of ...
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(1984)The isolation and identification of a cathodic degradation product from cephradine after acidic hydrolysis in presence of 1 % formaldehyde is reported. Also, the electroacti vity of an anodic degradation product is described. ...
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(Sociedad Chilena de Química, 1984)El presente estudio tiene por objeto correlacionar las propiedades catalíticas de estos complejos ternarios con las concentraciones de las especies provenientes de los equilibrios de disociación del complejo mixto a ...
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(Pergamon Press, 1985)The preparation of aminocomplexes of Co(III) containing D-ribose, L-sorbose or D-glucosamine as second ligand is described. Their spectral features and optical activity are reported. Formation in solution of complex ...
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(Sociedad Chilena de Tecnología de Alimentos, 1985)Se formuló y desarrolló un guiso preparado (garbanzos con carne) en ración individual y destinado a una institución estatal. Se prepararon diferentes formulaciones de guisos que cumplían teóricamente las especificaciones ...
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(Colegio de Químicos Farmacéuticos de Chile (A:G:), 1985)Es cada vez más evidente que la informática (manejo de información) y los computadores (procesadores de información), están cambiando nuestro sistema de vida. Por ahora podemos decir que el computador nos ofrece las ...
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(1985)Abstract— The quenching rate of triplet benzophenone in water and/or water mixtures has been determined employing vitamin C, vitamin E, cystine, cysteine, reduced and oxidized glutathione, methionine and DL‐penicillamine. ...
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(1985)A highly sensitive extraction-spectrophotometric method has been developed for the determination of iron based on the formation of a ternary complex with 1,10-phenanthroline as a primary ligand and picrate as a counter ...
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(1985)1. 1. Liver microsomes from alloxan diabetic rats displayed decreased activity to hydroxylate testosterone only at the 2-α and 6-β positions. 2. 2. Diabetic insulin-treated rats showed higher hydroxylase activities than ...
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(1985)We report results of Xα valence bond scattered wave (Xα-VB-SW) calculations for a variety of clusters that mimic the active sites in iron-sulfur proteins: Fe(SR)41-,2- (R = H, CH3), Fe2S2(SH)42-,3-, and Fe4S4(SCH3)42-,3-. ...
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(1985)The effect on lactose production of several external modulators of intracellular cyclic AMP was studied in rat mammary gland tissue slices and explants. Adrenaline, a β-adrenergic receptor effector, forskolin, a direct ...
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(1985)We have analyzed the dependence of the serotonin receptor binding affinity on the electronic and steric reactivity indexes for a group of 5‐substituted tryptamines. The approaches employed are a new nonempirical Quantitative ...