Browsing by Issue Date Artículos de revistas
Now showing items 301-320 of 2801
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(MUNKSGAARD INT PUBL LTD, 1991-06-15)C28H32CuN4O2(2+).2Cl-.2H2O, M(r) = 627.06, monoclinic, P2(1)/c, a = 9.137 (2), b = 9.047 (2), c = 18.377 (7) angstrom, beta = 99.10 (3)-degrees, V = 1500.4 (9) angstrom3, Z = 4, D(x) = 1.529 Mg m-3, lambda(Mo K-alpha) = ...
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(INST ORGANIC CHEM AND BIOCHEM, ACAD SCI CZECH REPUBLIC, 1991-12)Five N-p-phenyl substituted benzamidines were studied by DC and DP polarography in a wide pH range. Coulometric results show that the overall processes are four-electron reductions. Logarithmic analysis of the waves indicate ...
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(Longman Group, 1992)A lithium carbonate controlled release tablet was evaluated in vivo and compared with a conventional lithium carbonate tablet. Changes in the first formulation were made in order to achieve a better performance. The ...
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(MARCEL DEKKER INC, 1992)The synthesis of pyranoquinone 9 starling from hydroxyquinone 4 through Michael adduct 5 is described.
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(1992)Diphenylmethyl radicals generated photochemically from 1,1,3,3-tetraphenylacetone (TPA) or 1,ldiphenylacetone (DPA) have been examined in vesicles using laser flash photolysis techniques. Experiments in small vesicles ...
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Desarrollo de un comprimido de teofilina de liberación controlada. Evaluación "in vitro" e "in vivo" (Real Academia de Farmacia, 1992)Se desarrollaron las tres formulaciones (F1, F2 y F3) de Teofilina de 300mg de liberación controlada, en forma de comprimidos obtenidos por vía húmeda, utilizando las resinas acrílicas Eudagrit S199R y EUDAGRIT RSPMR. Las ...
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(Universita degli Studi di Pisa, Istituto di Chimica Agraria, 1992)Wasterwastes of municipal and industrial origin used to irrigate farmlands contain heavy metals which are sorbed on the surfaces of soil particles. Among those metals are cadmium (Cd) and copper(Cu). The degree to which ...
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(MARCEL DEKKER INC, 1992)The synthesis of pyranoquinone 6 and its application to the elaboration of pyranonaphthoquinone 1b is described.
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(1992)The amphetamine derivative 4,5‐dimethoxy‐2‐nitrophenyl‐2‐aminopropane, a positional isomer of the potent hallucinogen DON, was studied by cyclic voltammetry and polarography. The nitro compound was reduced to the corresponding ...
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(1992)The influence of various common basic solvents on the IR and 1H-NMR spectra of a series of N,N′-thiodianilines, , X = H, OMe, Br, Cl, and m-NO2 has been studied. The solvent shifts of both, frequencies θ(NH) and chemical ...
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(1992)An integrated-sensor method for the determination of formaldehyde based on retention of the reaction product of the analyte with p-rosaniline and sulfite in a flow-cell packed with Dowex 1-X-8 anion exchange resin was ...
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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 ...
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(1992)A solvent extraction-spectrophotometric determination of trace amounts of ruthenium has been developed, based on the formation of an ion association complex of ruthenium (III) with 2,4,6-tris(2'-pyridyl)-1,3,5-triazine as ...
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(Kluwer Academic Publishers, 1992)Azotobacter vinelandii was better than either Derxia gummosa or Rhizobium trifolii for sorption of UO2 2+. Its maximum binding capacity was 0.25 mmol UO2 2+/g dry biomass with an affinity constant of 333 l/mmol at pH 4.1 ...
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(1992)Metal removal by seven strains of Bacillus and Micrococcus was investigated. The culture age of the cells had little or no effect on their sorption capacity. Using the Langmuir isotherm, it was possible to determine that ...
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(1992)1. 1. The sperm nuclei of the marine bivalve mollusc Mesodesma donacium contain four somatic-type histones (H2A, H2B, H3 and H4), one sperm histone H1-like and a sperm-specific protein, named by us M1. 2. 2. The histone ...
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(Kluwer Academic Publishers-Plenum Publishers, 1992)Externally added ascorbate or NADH effectively reduced ferricyanide and promoted the exit of Fe3+ originated from acid-destabilized transferrin contained inside endocytic vesicles. The effect of ascorbate was mediated by ...
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(1992)A protein isolated and purified from the outer membrane of the acidophilic, chemolithotrophic bacterium, Thiobacillus ferrooxidans with an oligomeric molecular weight of 90 000 Da (p9O) was incorporated into phosphatidyl ...
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(1992)The major heat shock proteins from Thiobacillus ferrooxidans were identified as DnaK and GroEL equivalents by Western blotting and analysis of the N-terminal amino acid sequence of spots isolated from dried 2-D polyacrylamide ...