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Showing 1 to 20 of 46 for “"Stability Constants"”.
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Determination of Conditional Stability Constants of Copper(ii) Complexes With Naturally Occurring Macromolecules
… made of models currently in use for determining stability constants of metal complexes with humic and fulvic acids. Most models are shown to reduce to forms based on Adair's equation, in which the macromolecule is assumed to be the central group and where binding is evaluated graphically as a …
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Stability Constants of Metal-Polyelectrolyte Complexes Occurring Naturally in Soils and Sewage Sludge
Made available in DSpace on 2014-12-12T00:17:44Z (GMT). No. of bitstreams: 1 7121236.pdf: 3548314 bytes, checksum: b786ff2e0a3a55947627400cf90c48f6 (MD5) Previous issue date: 1971
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Structure and Stability Constants of Boron, Calcium, and Magnesium Gluconate Chelates From Optical Rotation and Computer Analysis
Made available in DSpace on 2014-12-09T17:36:23Z (GMT). No. of bitstreams: 1 6915392.pdf: 4748072 bytes, checksum: 50ce2e8bf06fe69c5486583c5613ecd1 (MD5) Previous issue date: 1969
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Syntheses of selected mono- and di-esters of phosphoric acid and stability constants of their copper (II) complexes
… group to form a seven-membered ring. Formation constants are given for two protonation and four copper(II) complexes of ligand (B) and for one protonation and four copper(II) complexes, each, of ligands (A) and (D).
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THE DETERMINATION OF STABILITY CONSTANTS AND COMPLEXING CAPACITIES OF NATURAL ORGANIC MATTER FOR COPPER (2+), COBALT (2+) AND MANGANESE (2+) BY FLUORESCENCE QUENCHING TITRATION
… capacities (C(,L)) and 1:1 conditional stability constants (K) of fluorescing ligands with paramagnetic metal ions at the micromolar level. Titrations of the model compound L-tyrosine prove the validity of the technique. Fluorescence data for SFA with Cu('2+) at pH 5, 6 and 7 compares …
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Metal complexes of penicillin and cephalosporin antibiotics
… the ligand on the structure of the complex. The stability constants of several metal-ions/penicillin complexes were determined potentiometrically. These were correlated with stability constants determined for several related complexes. Finally the kinetics of the Ni(II) substitution reaction with …
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Expanding the metallomics toolbox: Development of chemical and biological methods in understanding copper biochemistry
… conditions. Knowledge of copper(I) stability constants of proteins is important to elucidate the mechanisms of cellular copper homeostasis. Due to the high affinity of most Cu(I)-binding proteins, the stability constants cannot be determined directly by titration of the apo-protein …
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Electrochemical speciation and quantitative chromatography for modelling of indium bioleaching solutions
… leaching and extraction efficiency. Indium stability constants and chemical conditions of process relevant solutions were required. Electrochemical methods were used to determine the stability constants of indium complexes with nitrate, chloride, sulfate, and hydroxide ions, as well as with …
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The synthesis and properties of some chelating ion exchangers.
… An attempt to determine the magnitude of the stability constants for the metal-resin complexes, uranyl and copper-poly styrene chelates, has been made. It has been shown that the uranyl values lie somewhat lower than the stability constants of the corresponding metal-monomor complexes, whilst …
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EFFECTS OF COMPLEXATION WITH THE SIDEROPHORE DESFERRIOXAMINE B ON TRANSITION METAL REMOVAL FROM SEAWATER
… in seawater. I present here a series of stability constants for complexes of several transition metals with the trihydroxamate siderophore desferrioxamine B (DFOB), representative of a class of small organic ligands that are exceptionally selective for Fe(III) and found in open ocean …
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Metal-ions in biofluids-aluminium in-vitro studies
[Page ii missing] The stoichiometric stability constants of aluminium III of inorganic phosphates and adenine nucleotides have been determined at ionic strength. I = 0,15 and a temperature of 25°C using glass electrode potentiometry and computer modelling. The protonation sequence for …
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CADMIUM(II), LEAD(II), AND COPPER(II) COMPLEXATION BY FULVIC ACIDS DERIVED FROM SOIL AND WATER: ION-SELECTIVE ELECTRODE AND SPECTROFLUOROMETRIC STUDIES
… of Cd('2+) by fulvic acid. The conditional stability constants for complexes between aqueous Cd('2+) and the two fulvic acids were studied by Cd('2+) ion-selective electrode potentiometry. A temperature of 25(DEGREES)C and a medium of 0.1 M KNO(,3) was used throughout. The best results arose …
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The Completion of Nickel(II) Chloride with Thiourea in Aqueous Medium
… applied to approximate calculation of overall stability constants and enthalpies for the formation of complexes in solution.
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The chemical speciation of potential dermally-absorbed copper-based antiinflamatory drugs
… (EDA) were synthesised and characterised. The stability constants of their complexes with divalent copper, zinc and calcium complexes were determined at 25 °C in 0. 15 mo] dm·3 (Na)[CIJ by glass electrode potentiometry. The stability constants found for the copper complexes indicated that in …
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In vitro studies of dermally absorbed Cu(II) tripeptide complexes as potential anti-inflammatory drugs
… methyl group on the terminal amine decreased the stability constants of the copper(II) ligand species by 0.38 to 1.67 log units. It increased the stability constants of the zinc(II) ligand species by 0.13 to 1.07 log units and it also increased the stability constant of the NiL2H-1 species by 1.3 …
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Synthesis and Characterization of Polyaminopolycarboxylic Acid Analogs of EDTA and Their Transition Metal Complexes
… formed were analyzed using UV-Vis, and the stability constants of the complexes were determined using potentiometry.
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The evaluation of an organophosphate thermosetting resin for use in a high temperature resistant composite and a study of chemistry of ionomer cements
… resin has been made and used in high temperature stability studies. Post-cured resorcinol phosphate resin-chrysotile asbestos (30: 70) moulded bars retained 59.5% of their flexural strength after ageing at 523K for 1000 hr in air. Similar phenol-formaldehyde composite bars aged under identical …
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