Browsing by Title Artículos de revistas
Now showing items 2292-2311 of 2801
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(AMER CHEMICAL SOC, 2005-03-30)The sorption behavior of gallium and indium into a microcapsule containing 2-ethylhexylphosphonic acid mono-2-ethylhexyl ester is investigated. The effects of pH and metal concentration on sorption rate are investigated ...
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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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(Sociedad Chilena de Quimica, 2012)Biosolid model samples (BMSs) were developed to study the capacity of various matrixes to adsorb polybrominated diphenyl ethers (PBDEs) as a function of their composition. A commercial standard reference samples for biosolids ...
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(Springer, 2015)Sorption-desorption behavior of six pesticides and some degradation products was assessed on seven agricultural volcanic and nonvolcanic soils belonging to Andisol, Ultisol, Mollisol, and Alfisol orders. The global ...
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(ELSEVIER SCIENCE BV, 2005-12-30)This work presents theoretical and experimental results on the speciation of the Fe(Il)-Fe(III)-H2SO4-H2O system in concentrated solutions (up to 2.2 m H2SO4 and 1.3 m Fe). The aim was to study the chemical equilibria of ...
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(American Chemical Society, 2014)The thermally induced intermolecular electron transfer reaction in acetonitrile between the tetracyanoethylene (TCNE), a [pi]-electron acceptor with a large electron affinity, and six oxoisoaporphines (2,3-dihydro-7H-d ...
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(MDPI AG, 2014)The kinetics and spectral characteristics of the transients formed in the reactions of • OH and •N3 with quinoxalin-2(1H)-one (Q), its methyl derivative, 3-methylquinoxalin- 2(1H)-one (3-MeQ) and pyrazin-2-one (Pyr) were ...
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(Amer Chemical Society, 2016)Transient intermediates were identified in the photoreduction of 3-methylquinoxalin-2-one derivatives by N-phenylglycine, NPG, and N-acetyltryptophan, NAT. For both reductants it can be postulated a sequence of reaction ...
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(MDPI, 2021)The azide radical (N-3(?)) is one of the most important one-electron oxidants used extensively in radiation chemistry studies involving molecules of biological significance. Generally, it was assumed that N-3(?) reacts in ...
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(SOCIEDAD CHILENA DE QUIMICA, 2002-09)A direct and simple second derivative digital spectrophometric method has been developed for the simultaneous determination of the sulfamethoxazole and trimethoprim in pharmaceutical formulation. A study of the spectral ...
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(2002)A direct and simple second derivative digital spectrophometric method has been developed for the simultaneous determination of the sulfamethoxazole and trimethoprim in pharmaceutical formulation. A study of the spectral ...
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(WILEY-V C H VERLAG GMBH, 2004-04)Spectroelectrochemical and HPLC characterization of the electrochemical oxidation in aqueous medium of a series of six N-1 and C-4 substituted 1,4-dihydropyridines is presented. Based on the analysis of spectra obtained ...
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(2004)Inclusion complexation between furnidipine (2,6-dimethyl-4-(2-nitrophenyl)-1,4-dihydropyridine-3,5-dicarboxylic acid 3-tetrahydrofurfuryl 5-methyl diester), a calcium-channel antagonist, and beta-cyclodextrin (beta-CyD) ...
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(ELSEVIER SCIENCE BV, 1993-11-15)A continuous-flow sensor based on integrated separation and spectrophotometric detection was developed for the determination of sulphur dioxide at the ng ml-1 level by transient immobilization of the reaction product formed ...
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(Sociedade Brasileira de Quimica, 2010)The aim of this study was to determine the influence of the substituent groups on the photostability of eight boldine derivatives, including some oxazole and oxazinone derivatives, in order to increase the sunscreen ...
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(2010)The inclusion complexes of Luteolin (LU) with cyclodextrins (CDs) including β-cyclodextrin (βCD), hydroxypropyl-β-cyclodextrin (HPβCD) and dimethyl-β-cyclodextrin (DMβCD), Scheme 1, have been investigated using the method ...
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(Royal Soc Chemistry, 2016)The inclusion complexation behavior of 3-(2-thienyl)-[1,2,3]triazolo[1,5-a]pyridine ( TTP) with native beta-cyclodextrin and derivatized cyclodextrins was investigated. Stability constants for complexes with 1 : 1 molar ...
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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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(Elsevier, 2018)The use of alpha-tocopherol and ascorbic acid in freezing medium prevents lipoperoxidation and damage by ROS (reactive oxygen species); however, the effects of these antioxidants in salmonid spermatozoa have not been ...
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(EDP Sciences, 2019)Aims. HD 142527 is one of the most frequently studied Herbig Ae/Be stars with a transitional disk that hosts a large cavity that is up to about 100 au in radius. For this reason, it has been included in the guaranteed time ...