Browsing by Issue Date Artículos de revistas
Now showing items 741-760 of 2801
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(AMER CHEMICAL SOC, 2000-11-17)The photophysical and photochemical behavior of 1-methyl-3-phenylquinoxalin-2-one (MeNQ) and 3-phenylquinoxalin-2-one (HNQ) in the presence of amines is reported. While HNQ fluorescence shows an auxochromic effect and a ...
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(SOCIEDAD CHILENA DE QUIMICA, 2000-12)A new vector (V-c) is proposal for structure the topological index of H. P. Schultz (2-MTI). This vector contain elements that correspond to the electron charge density soported on the carbon atoms of the molecule and ...
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(SOCIEDAD CHILENA DE QUIMICA, 2000-12)Time resolved near IR luminescence detection of singlet oxygen, O-2((1)Delta (g)), and steady-state photolysis experiments were performed to study in detail limitations and approaches involved when 9,10-dimethylanthracene ...
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(ELSEVIER SCIENCE, 2000-12-01)In this report we have chosen ethyl-m-nitrobenzoate (EMNB) as a prototype of a nitroaromatic compound in order to carry out a detailed cyclic voltammetric study focused on the coupled chemical reaction of the generated ...
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(ELSEVIER SCIENCE SA, 2000-12-15)The crystalline ion pair [Co-2{OOC-CCo3(CO)(9)}(5), C10H6(N(CH3)(2))(2)H] (1) presents unusual magnetic properties. The X-band EPR spectrum of 1 at room temperature presents two unresolved bands at g = 1.98 and 4.55. At a ...
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(ROYAL SOC CHEMISTRY, 2001)Two sensitive analytical atomic spectrometry methods, electrothermal atomic absorption spectrometry (ET-AAS) and hydride generation coupled to atomic fluorescence spectroscopy (HG-AFS), were optimized for determining total ...
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(MARCEL DEKKER INC, 2001)A method that allows the synthesis of 4 different heterocyclic systems of fused aryl oxazoles, i.e., naphtho[1,2-d], naphtho[2,1-d], naphtho[2,3-d], and benzo[d]oxazoles in reasonable yield is del scribed. This method ...
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(Consejo Superior de Investigaciones Científicas, Instituto de la Grasa y sus Derivados, 2001)Se evaluó la progresión del deterioro de papas crisps almacenadas a temperatura ambiente en presencia de luz y en oscuridad, así como 49ºC y - 23ºC (control) en oscuridad. Se trabajó con muestras que provinieron de una ...
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(MARCEL DEKKER INC, 2001)This article reports on methabenzthiazuron [1-(1,3-benzothiazol-2-yl)-1,3-dimethylurea] (MBT) adsorption process on six agricultural allophanic and nonallophanic soils. The effect of amendment with exogenous organic matter ...
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(Elsevier Sciences B. V., 2001)We have cloned and sequenced the rfaH gene from Salmonella enterica serovar Typhi Strain Ty2. The gene shoed a high degree of similirity to the rfaH genes from Escherichia coli K-12 and S. enterica serovar Typhimurium. A ...
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(Sociedad Chilena de Cardiología y Cirugía Cardiovascular, 2001)El proyecto Genoma Humano ha logrado descifrar la secuencia completa del genoma, aportando una herramienta única para el estudio de la genética humana. Sin embargo, se ha observado cada vez más frecuentemente la aparición ...
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(2001)Fritura industrial de patatas crisps. Influencia del grado de insaturación de la grasa de fritura sobre la estabilidad oxidativa durante el almacenamiento. Se estudia la estabilidad oxidativa de patatas crisps elaboradas ...
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(Consejo Superior de Investigaciones Científicas, Instituto de la Grasa y sus derivados, 2001)Se estudia la estabilidad oxidativa de patatas crisps elaboradas con dos aceites: girasol (AG), girasol parcialmente hidrogenado (AGPH). Las patatas se almacenan a temperatura ambiente con luz, a 40ºC en estufa de aire ...
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(MARCEL DEKKER, 2001)PA-824 (2-nitro-6-(4-trifluoromethoxy-benzyloxy)-6,7-dihydro-5H-imidazo [2,1-b][1,3]oxazine) a nitroimidazopyran drug candidate for the treatment of tuberculosis was electrochemically studied with the aims of to propose a ...
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(MARCEL DEKKER INC, 2001)Some organic acids of low molecular weight, generated through breakdown of giant wastes or root exudation, increase the solubilization of heavy metals, such as cadmium (Cd) and copper (Cu) through complexation reactions ...
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(Sociedad Chilena de Cardiología y Cirugía Cardiovascular, 2001)La apoptosis junto a la paraptosis y la necrosis constituyen las principales formas de muerte celular conocidas hasta la fecha. La apoptosis se caracteriza por una disminución del volumen celular y formación de "cuerpos ...
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(Sociedad Chilena de Cardiología y Cirugía Cardiovascular, 2001)Los cardiomiocitos son células terminalmente diferenciadas que cesan de dividirse inmediatamentre despúes del nacimiento. Esto hace del corazón un órgano muy vulnerable a eventos isquémicos, tóxicos e inflamatorios. La ...
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(MARCEL DEKKER INC, 2001)A very simple and efficient method to prepare aminonaphthalene derivatives in good yield using the Bucherer reaction under microwave irradiation in a closed vessel is described. A reaction time of 30 min at 150 Watts of ...
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(Sociedad Española de Cardiología, 2001)En este modelo experimental de HVI hipertensiva mixta existe una activación temprana de la ECA plasmática y cardíaca. La administración precoz de un IECA previene el desarrollo de hipertensión e HVI al inhibir el aumento ...
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(2001)The structural elucidation of complex organic molecules relies heavily on the application of proton detected heteronuclear NMR. Among these techniques, the HMBC NMR experiment is probably the most useful 2D NMR method. The ...