Browsing by Title Artículos de revistas
Now showing items 519-538 of 2801
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(Elsevier Ltd, 1996)The preparation and spectroscopic properties of mononuclear cationic complexes of rhodium(I) coordinated to the diolefin 2,5-norbornadiene (NBD) and to the heterocyclic nitrogen ligands 6,7-dihydrodipyrido-[2,3-b:3′,2′-j ...
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(2003)En este trabajo se realiza una evaluación estadística para conocer cómo influye la concentración del ionóforo y el disolvente mediador (DM) en la pendiente (S) y el Límite Práctico de Detección (LPD) de siete electrodos ...
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(Asociación de Químicos e Ingenieros del Instituto Químico de Sarría, 2003)The statistical evaluation of seven ion selective chemical sensors (ISE) for nitrate ion determination, based on polymeric membranes on a conductive support, has been carried out in this work. This was donw in order to ...
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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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(Instituto Antártico Chileno, 1982)La especial situación geográfica de la Antártica y sus características meteorológicas hacen que el estudio de sus aerosoles atmosféricos sea particularmente interesante. En este trabajo se ha estudiado la composición ...
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(Sociedad Latinoamericana de Nutrición, 2000)En el último tiempo se ha puesto un gran énfasis en el c.'<1udiode la presencia de ácidos grasas potiins3turados de Ja familia omega~3 en aJimentos de origen marino. debido a sus efectos beneficiosos descritos en relación ...
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(Sociedad Chilena de Tecnología de Alimentos, 1987)Se analizan muestras de chocolates: con leche en barra, de fantasía en barra, en polvo amargo, en polvo dulce y coberturas de helados para determinar la calidad y cantidad de la materia grasa como también el valor calórico ...
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(Wiley, 2020)Goldenberry is a wild fruit that has been widely used for centuries, mainly in folk medicine. Most studies of goldenberry have focused on the fruit, but new research has studied its byproducts, which were considered to ...
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(ELSEVIER SCIENCE BV, 2002-04-26)A computer assisted molecular modeling was used to design molecules having a shape complementary to the active site of glutathione reductase (GR) and trypanothione reductase (TR). The designed 5-nitro compound derivatives. ...
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(Institute of Agricultural and Food Information, 2014)The urea complexation was used to concentrate n-3 fatty acids (FA) from crude and refined commercial salmon oils. The experimental procedure included salmon oil saponification, free fatty acid (FFA) collection, formation ...
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(IST CHIMICA AGRARIA, UNIV PISA VIA S MICHELE DEGLI SCALZI, 1999-05)The content and the chemical forms of chromium, copper, nickel and zinc in allophanic and montmorillonitic soils, one of them irrigated exclusively with untreated sewage waters, were studied. To gain information about the ...
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(Wiley-VCH Verlag, 2018)© 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim In this work, gamma-linolenic acid (GLA) and stearidonic acid (SDA) are successfully concentrated as free fatty acids (FFA) and ethyl esters (EE) using the urea complexation ...
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(2010)Hemocyanins are copper-containing glycoproteins in some molluscs and arthropods, and their bestknown function is O2 transport. We studied the site of their biosynthesis in the gastropod Concholepas concholepas by using ...
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(ENDOCRINE SOC, 2001-05)Gamma amino butyric acid (GABA) is the main inhibitory neuro-transmitter controlling LH-releasing hormone (LHRH) secretion in the mammalian hypothalamus. Whether alterations in GABA homeostasis within discrete regions of ...
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(Elsevier Ltd, 1996)The conformation in 2H2O of 4-thio-L-lyxono-1,4-lactone (1) was studied by nuclear magnetic resonance spectroscopy, by means of homonuclear (J(1(H),1(H))) and heteronuclear (J(1(H),13(C))) coupling constants. The couplings ...
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(TAYLOR & FRANCIS LTD, 2003-11)The diacyl ylide, 3-triphenylphosphoranylidene-2,4-pentanedione (2) can adopt conformations stabilized by ylidic resonance with both acyl oxygens syn- or with one oxygen syn- and the other anti- to cationoid phosphorus, ...
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(Elsevier, 2019)Quinoa proteins (QP) have promise as a potential source of novel food ingredients, and it is of great interest to know how high-intensity ultrasound (HIUS) treatments affect the properties of QP. This work aimed to study ...
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(2007)Ferroelectric liquid crystals bearing a chiral pyrrolidine-type ring were prepared using (-)-(S)-malic acid as a building block. The compounds were characterized using the thermal analysis techniques of DSC and POM, ...
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(TAYLOR & FRANCIS LTD, 2007-01)The diacyl ylid, 3-triphenylphosphoranylidene-2,4-pentanedione 2 can adopt conformations with one oxygen syn- and the other anti- to phosphorus 2a as in the crystal, or with both oxygens syn- to phosphorus 2b. In solution, ...
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(SOCIEDAD CHILENA DE QUIMICA, 2001-09)Activation parameters for the rotation around the methylene-nitrogen single bond found in a series of four 2,2'-disubstituted N-acetyl-N-phenylbenzylamines, dissolved in DMSO-d(6), were measured employing the temperature ...