Browsing by Issue Date Artículos de revistas
Now showing items 21-40 of 2801
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(1967)Dimensional analysis and the theory of biological similarities were applied to the mammalian respiratory system. Through dimensional and solution matrices a set of 9 Pi-numbers of Buckingham was obtained. Products of ...
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(Nature Publishing Group, 1968)Observations of the colour of Serratia marcescens colonies and of chromatographic behaviour of Serratia pigments recently led Allen to suggest that "pH is not the only factor involved in the colour change of prodigiosin ...
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(American Society of Agronomy, 1968)The objective of the present investigation was to study changes in levels of phosphorus and nitrogen in soils supplemented with dry, ground seaweeed, KNO3, and KH2PO4. After intervals of 21, 42, 76 and 105 days, phosphorus, ...
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(1968)Eleven cases of cardiomyopathy are presented in which the toxoplasmic infection was ascertained by serologic study. The parasite was recovered from the heart in one of them. All other common etiologies were ruled out by ...
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(1968)The free radicals induced by gamma radiation in deaerated aqueous solutions of 2′‐3′ uridylic acid at 77°K have been studied by electron spin resonance techniques. The annealing at 193°K of the OH radical trapped at 77°K ...
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(Pergamon Press, 1969)The shift of the first and second spin allowed bands due to the stepwise replacement of the nitrogen atoms in a complex of Cr(III) of the CrN6 type of oxigen atoms of water or of carboxylic groups is analized in terms of ...
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(1969)The influence of the concentration of nonionic detergents on the cloud point of their aqueous solutions is discussed using Huggins' theory of polymer solutions. The treatment is exemplified by applying the theory to the ...
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(1969)The reactions between hydroxide or fluoride ion and p-nitrophenyl diphenyl phosphate, catalyzed by micelles of cetyltrimethylammonium bromide, are inhibited by phenyl, diphenyl, and p-t-butylphenyl phosphate. With decreasing ...
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(1969)The shift of the first and second spin allowed bands due to the stepwise replacement of the nitrogen atoms in a complex of Cr(III) of the CrN6 type by oxygen atoms of water or of carboxylic groups is analyzed in terms of ...
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(1969)Several iron (II) nitrosyl bis-dithiocarbamates have been studied by the Mössbauer and other spectroscopic methods. The Mössbauer effect has proved to be useful for studying slight changes in chemical bonding due to ...
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(Instituto de Investigaciones Agropecuarias (Chile), 1970)En el presente trabajo se estudió las variaciones que sufren los contenidos de lisina total, lisina disponible, triptofano y proteína de tres variedades de maíz a medida que avanza el proceso de maduración. Se estudiaron ...
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(1970)The catalytic efficiencies of phenyl- and 2,4-dimethoxyphenylcetyldimethylammonium bromides (CPDA and CDPDA) are greater than that of cetyltrimethylammonium bromide (CTABr) for the spontaneous hydrolyses of the dianions ...
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(1970)The effect of electrolytes upon aqueous solutions of nonionic detergents is studied by examining the distribution of the three components between the conjugate phases in the corresponding ternary diagrams. NaSCN and NaCl ...
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(1970)THE excitatory action of strychnine on the central nervous system results from its ability to antagonize the effect of synaptic inhibition1. Recently, evidence has accumulated for glycine as an inhibitory transmitter, ...
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(1970)Micellar effects upon the reaction between hydroxide ion and bis-2,4-dinitrophenyl phosphate to give 2,4-dinitrophenyl phosphate have been examined. The reaction is catalyzed up to 30-fold by cationic micelles of ...
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(Societá Chimica Italiana, 1971)From the stem bark of Strychnos romeu-belenii Krukoff and Barneby, a Longaniacea of South America, a new indolinic alkaloid has been isolated to which the structure of 11-,11-methoxy-diaboline(I) has been assigned on the ...
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(Madrid, Dpto. de Investigaciones Bromatológicas. Consejo Superior de Investigaciones Científicas, 1971)The importance of triptophan in food value and the problems that are still encountered when it is measured prompted the comparison of different techniques of hydrolysis by means of which it can be freed from food protein. ...
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(American Society of Agronomy, 1971)A volcanic ash-derived soil was incubated uo to 93 days with different amounts of seaweed. P was then extracted using an anion exchange resin method, and it was found that extractable P increased with increasing amounts ...