Artículos de revistas: Recent submissions
Now showing items 1061-1080 of 2801
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(Elsevier Ltd, 1996)The title compound [Cu2C19H20N6O7Cl](2) is a copper(II) complex, in which each bicationic moiety is bridged by two pyrazolate ligands. In the centrosymmetric, tetrameric dications pairs of copper atoms, one square planar ...
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(1992)CRE-319, a novel 1,4-dihydropyridine derivative, produces a cathodic polarographic peak due to the reduction of its nitro group according to the following well-known general pathway for the nitro group. The electrode ...
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Synthesis and characterization of polynuclear complexes of molybdenum carbonyl derivatives with ... (Elsevier Ltd, 1998)Novel mono- and didentate ferrocenylphosphines containing complexes, [Mo2(CO)6(dfpp)2(μ-pa)] (dfpp = diferrocenylphenylphosphine) and [Mo2(CO)6(μ-dppf)(μ-pa)], have been isolated and characterized by infrared and electronic ...
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(1981)A subbituminous coal from La Union (Chile) has been treated with aqueous NaOH solutions. The quantity of coal solubilized and the elimination of ash was found to increase with increase in hydrolysis time, temperature and ...
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(Sociedad Chilena de Quimica, 1999)The EPR spectra of a series of mononuclear complexes [CpFe(dppe)SR]PF6 R = C6H5 (1), C3H7 (2), p-C6H4Br (3) and the binuclear [CpFe(dppe)-S-CH2CH2-S-CpFe(dppe)](PF6) 2 (4) were measured. All the paramagnetic complexes ...
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(1999)Electronic absorption spectra for the complexes [CpFe(dppe)NC-R]PF6 R = CH2-C6H4-ON3P3(OC 6H4t-Bu)5 (1), R = CH2-C6H4-OH (2) and R = CH3 (3) in different solvents have been measured. The two absorption bands at the lowest ...
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(Springer-Verlag, 1983)The perception of the surrounding environment and use of the flora by the inhabitants of Toconce, a Pre-Altiplanic community in the Andes of northern Chile, were investigated. Six ecological units, which are given the local ...
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(American Society for Photobiology, 1997)The kinetics of fluorescence quenching of pyrene and three of its derivatives by a series of n-alkylpyridinium ions has been studied. The quenching process is diffusion controlled for all the systems studied, independent ...
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(2011)Several reviews have been published on sesquiterpenes, and on drimane-type sesquiterpenes, going through drimenol and related compounds among others. However, to our knowledge, this is the first review exclusively on ...
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(1999)The dipole polarizability of a series of clusters of the type LinHm has been calculated using density functional methods. The study of the trends in the mean polarizability and the anisotropy are explained in terms of the ...
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(1990)Barley seedlings were subjected to water and cold stress, and the composition of lipid fractions and the accumulation of several low molecular weight metabolites in leaves determined. Proline, glycine-betaine and the total ...
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Preparation of new cationic complexes [(η5-C5H5)Fe(dppe)L]PF6 with sulphur and other donor ligands (1994)The reaction of (η5-C5H5)Fe(dppe)I with the ligand L′ (L′ = S2(CH3)2, C6H5SNR2 (R = CH3, C6H11), S(NC4H8O)2, P(n-Bu)3, tetrahydrofuran and NC5H5 in the presence of T1PF6 have been investigated. Formation of the new cationic ...
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(1997)Objective: Preterm premature rupture of membranes (PROM) is responsible for one-third of premature deliveries and is associated with maternal and neonatal morbidity and mortality. Several studies have investigated the role ...
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(2011)Methyl-β-cyclodextrins (MβCDs) are molecules that are extensively used to remove and to load cholesterol (Chol) from artificial and natural membranes; however, the mechanism of Chol extraction by MβCD from pure lipids or ...
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(Academic Press Inc., 2004)
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(Verlag der Zeitschrift fur Naturforschung, 2005)Bioassay-directed fractionation for the determination of antimicrobial activity of Uncaria tomentosa, has led to the isolation of isopteropodine (0.3%), a known Uncaria pentacyclic oxindol alkaloid that exhibited antibacterial ...
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(1979)Waste material obtained from the mechanical peeling of Antarctic Krill (Euphasia superba) was studied in order to evaluate its potential use as a raw material for the preparation of protein isolates. A dye‐binding method ...
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(Elsevier Ltd, 1997)Copper(II) complexes of the ligands (6-methyl-2,2′-dipyridyl)methane (MeDPM) and (6,6′-dimethyl-2,2′-dipyridyl)methane (diMeDPM) were prepared and used as catalysts for the oxidation of 3,5-ditert-butylcatechol to ...
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(1993)Swedish wheats were analysed at the seedling stage for hydroxamic acids (Hx), a family of natural aphid resistance factors. Analysis comprised the historical development from old landraces to modem cultivars, and included ...
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(Kluwer Academic Publishers-Plenum Publishers, 1992)It has been previously reported that dimeric compounds of the general formula [L3Cu(II)]2(μ-Cl)2 exhibit a correlation between their magnetic coupling constant J and the bridging Cu-Cl-Cu angle. A full survey of the published ...