Browsing by Title Artículos de revistas
Now showing items 2743-2762 of 2801
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(Elsevier, 2018-06)Eighteen alkaloids were detected in the bark, leaves, wood and roots of Peumus boldus, including traces of secoboldine, N-methylsecoboldine (boldine methine), glaucine and norreticuline, not reported previously as constituents ...
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(2003)Data is presented on the quenching of 9,10-dicyanoanthracene by benzene derivatives in acetonitrile. The quenching occurs via a charge transfer mechanism with the quenching rate constants exhibiting a Rehm-Weller dependence ...
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(SOC CHILENA QUIMICA, 2007-09)The aim of this work is based in the reduction of independent variables in multivariate regression analysis to one by means a vector dot product (E-3). By this way, it is omit the orthogonalized procedure to obtained valid ...
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(NATURAL PRODUCTS INC, 2008)The structural elucidation of natural products and complex organic molecules relies heavily on the application of proton detected heteronuclear NMR. Among these techniques, the HMBC NMR experiment remains as the most popular ...
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(Elsevier Ltd, 2019)Carminic acid (CA) contained in one kind of gummy candy was detected and quantified by using vibrational and electronic spectroscopy, respectively; the proposed methodology in solution is simple and rapid without sample ...
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(1981)The IR and Raman spectra of solid diamminemercury(II) chloride with 14N/15N and H/D isotopic substitution have been measured. The spectra have been interpreted assuming D3d symmetry for the [Hg(NH3)2]2+ cations which have ...
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(1996)FT-IR and FT-Raman spectra of Caulerpin, a green algae pigment, have been recorded. An assignment of the observed bands is proposed on the basis of previously reported vibrational spectra of similar structures. Intensity ...
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(Elsevier B.V., 2019)Silicic systems generate the most explosive eruptions on Earth. In contrast to basaltic systems, they can accumulate large volumes of magma without systematically erupting, confronting the classical interpretation that a ...
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(ELSEVIER SCI LTD, 2002-12)The viscoelastic relaxations of four copolymers of ethylene and I-octadecene, with different comonomer contents, synthesized with a metallocene catalyst, have been analysed and compared to those of the corresponding ...
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(Sociedad Chilena de Tecnología de Alimentos, 1990)A través de la historia, los gobiernos han realizado una función importante en la protección de los alimentos, controlando las adulteraciones, contaminaciones, alteraciones y rotulaciones inadecuadas. desde tiempos remotos ...
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(Hindawi Publishing, 2015)Maintaining the identity of Foxp3+ regulatory T cells (Tregs) is critical for controlling immune responses in the gut, where an imbalance between Tregs and T effector cells has been linked to inflammatory bowel disease. ...
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(Sociedad Española de Cardiología, 2005)La guanosina trifosfatasa pequeña Rho y su blanco Rho-cinasa desempeñan un papel importante en la regulación de la presión arterial y en la contracción de la musculatura lisa vascular. Diversos agonistas de los receptores ...
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(Frontiers Media, 2016)Abiotic stress has a growing impact on plant growth and agricultural activity worldwide. Specific plant growth promoting rhizobacteria have been reported to stimulate growth and tolerance to abiotic stress in plants, and ...
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(2001)Melatonin and Vitamin B6 can be oxidized at the glassy carbon electrode showing well-resolved anodic peaks by differential pulse voltammetry. Vitamin B6 shows an oxidation peak potential of about 650 mV vs Ag/AgCI in ammonia ...
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(1986)Trazodone, a triazolopyridine derivative with antidepressant activity, is irreversibly oxidized in two steps in a large range of scan rates. The first peak shows a linear dependence on trazodone concentration. This behaviour ...
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Voltammetric behavior and analytical applications of lomefloxacin, an antibacterial fluorquinolone (AOAC INTERNATIONAL, 2001-05)Lomefloxacin was reduced on a dropping mercury electrode, producing one or more peaks, depending on the pH of the aqueous medium. Coulometric measurements gave an experimental value of 1 electron for the main peak. ...
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(Elsevier, 2016)The cyclic voltammetric behavior of 3,5-dinitrobenzoic acid (3,5-DNB) in 0.1 M PBS of pH 7 was examined at a glassy carbon electrode (GCE). 3,5 -DNB was found to produce two irreversible reduction peaks corresponding to ...
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Voltammetric behavior of a 4-nitroimidazole derivative - Nitro radical anion formation and stability (ELECTROCHEMICAL SOC INC, 2005)A new synthesized compound, 1-methyl-4-nitro-2-hydroxymethylimidazole (4-MNImOH), was electrochemically reduced at the mercury electrode in aqueous, mixed, and aprotic media. In an aqueous medium, only one voltammetric ...
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(WILEY-V C H VERLAG GMBH, 2002-09)Lercanidipine is a new third generation 1,4-dihydropyridine calcium antagonist derivative used in hypertension treatments. From the structural point of view lercanidipine contains a nitroaromatic moiety which can be ...
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(Elsevier B.V., 2010)The electrochemical behavior and the analytical application of the selective serotonin agonist naratriptan (N-methyl-3-(1-methyl-4-piperidyl)indole-5-ethanesulfonamide) are presented herein. Naratriptan exhibits an anodic ...