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Kinetics
Items for "Kinetics"
Sunflower stem: a novel and economical scavenger for Hg(II) ions from aqueous solutions and its kinetic and thermodynamic investigation
The sorption of >93% of Hg(II) ions is achieved onto sunflower stem (50 mg/4.5 cm3) from deionized water (D.W.) in 10 minutes equilibration time between two phases...
Keywords: Sunflower (Helianthus annus) stem, Sorption, Hg(II) ions, Sorption isotherms, Kinetics
03/2006 | Radiochimica Acta, Oldenbourg WissenschaftsverlagStudies on sorption of cadmium (II) ions onto Haro river sand from aqueous media using radiotracer and voltammetric techniques
Sorption of Cd(II) ions on Haro river sand has been studied using radiotracer technique. The effects of pH and acid concentrations on the sorption were studied...
Keywords: Cd(II), Adsorption, Kinetics, Thermodynamics, River sand
08/2006 | Radiochimica Acta, Oldenbourg WissenschaftsverlagMechanism of Oxidation of L-Proline by Aqueous Alkaline Diperiodatoargentate (III): Decarboxylation and Dehydration
The kinetics of oxidation L-proline by diperiodatoargentate (III) (DPA) in alkaline medium at a constant ionic strength of 0.50 mol dm−3 was studied spectrophotometrically...
Keywords: L-Proline, Diperiodatoargentate (III), Oxidation, Kinetics
05/2006 | Zeitschrift für Physikalische Chemie, Oldenbourg WissenschaftsverlagPreferential Solvation Effects on the Kinetics and Thermodynamics of Oxidation of Anilines by Chromium(VI)
The imidazolium fluorochromate (IFC) oxidation of fifteen meta - and para-substituted anilines, in varying mole fractions of benzene in 2-methylpropan-2-ol as mixtures, in the presence of p-toluenesulfonic acid (TsOH) is first order in IFC and TsOH and zero order in substrate...
Keywords: Anilines, Chromium(VI), Kinetics, Thermodynamics, Oxidation
06/2006 | Zeitschrift für Physikalische Chemie, Oldenbourg WissenschaftsverlagVolumetric, Chromatographic, Refractometric Studies on the Esterification of Methanol with Acetic Acid in the Presence of Cation-Exchange Resins
Esterification of methyl alcohol with acetic acid catalysed by commercially available polymeric ion-exchange resins Amberlyst-15, Dowex 50W and Amberlite IR-120 was carried out in the temperature ranging between 323–338K...
Keywords: Esterification, Ion-Exchange Resin, Experimental Methods, Kinetics, Acetic Acid
06/2006 | Zeitschrift für Physikalische Chemie, Oldenbourg WissenschaftsverlagNp(V)O2+ sorption on hydroxyapatite-effect of calcium and phosphate anions
The sorption of NpO2+ from aqueous solution on hydroxyapatite was studied as a function of the amount of sorbent, initial NpO2+ concentration, ionic strength and pcH...
Keywords: NpO2+, Sorption, Hydroxyapatite, Kinetics, Thermodynamics
09/2006 | Radiochimica Acta, Oldenbourg WissenschaftsverlagIodination of humic acid samples from different origins
The iodination of Gorleben and synthetic humic substances (HS) was studied complementarily by UV-visible and X-ray Photoelectron Spectroscopy (XPS)...
Keywords: Iodine, Humic acid, Iodination, Kinetics, Aromaticity
09/2006 | Radiochimica Acta, Oldenbourg WissenschaftsverlagEffect of starting distance on vertical ground reaction forces in the normal dog
The purpose of this study was to evaluate the effect of starting distance on the peak vertical force (PVF) and associated vertical impulses (VI) of normal dogs...
Keywords: Kinetics, gait analysis, vertical ground reaction forces, starting distance
08/2005 | Veterinary and Comparative Orthopaedics and Traumatology, SchattauerThe measurement of ground reaction force in dogs trotting on a treadmill
We studied the time necessary to obtain reliable kinetic data from healthy dogs trotting on a treadmill...
Keywords: Kinetics, Dog, treadmill, habituation, gait analysis
10/2006 | Veterinary and Comparative Orthopaedics and Traumatology, SchattauerSorption behavior of curium(III) on hydrous silica: a kinetic and thermodynamic study
Sorption of tracer curium, Cm3+, on SiO2· H2O (silica gel) was investigated under different experimental conditions such as time of equilibration, concentration of Sm3+, pcH, and temperature...
Keywords: Curium, Sorption, Silica, Kinetics, Thermodynamics
03/2007 | Radiochimica Acta, Oldenbourg WissenschaftsverlagComparative study on ion-isotopic exchange reaction kinetics by application of tracer technique
The radioactive isotopes 131I and 82Br were used to trace the ion-isotopic exchange reactions using industrial grade ion exchange resins Amberlite IRA-400...
Keywords: Kinetics, Ion-isotopic exchange, Tracer isotopes, Specific reaction rate, Radioactivity
03/2007 | Radiochimica Acta, Oldenbourg WissenschaftsverlagThe use of lattice-parameter changes to trace the kinetics of phase transformations powder-diffraction analysis of disorder-order transformations in Ni1+δSn
The measurement of lattice-parameter changes by X-ray powder diffraction as a function of the progress of a phase transformation (e.g...
Keywords: X-ray powder diffraction, Phase transformations, Kinetics, Order-disorder transitions, Ni~1+delta~Sn alloys
03/2007 | Zeitschrift für Kristallographie, Oldenbourg WissenschaftsverlagOxidation of N-(4-Hydroxyphenyl) Acetamide (Paracetamol) Drug by Diperiodatocuprate(III) in Aqueous Alkaline Medium by Stopped Flow Technique
The kinetics of oxidation of anti-pyretic drug, paracetamol (PAM) by diperiodatocuprate (III) (DPC) in alkaline medium at a constant ionic strength of 0.10 mol dm - 3 was studied spectrophotometrically...
Keywords: Kinetics, mechanism, paracetamol drug, Oxidation, Diperiodatocuprate (III)
04/2007 | Zeitschrift für Physikalische Chemie, Oldenbourg WissenschaftsverlagEvaluation of Bacillus anthracis thymidine kinase as a potential target for the development of antibacterial nucleoside analogs
Keywords: Characterization, 5-fluoro-deoxyuridine, growth inhibition, Kinetics, thymidine
12/2006 | Biological Chemistry, Walter de GruyterNovel ketomethylene inhibitors of angiotensin I-converting enzyme (ACE): inhibition and molecular modelling
Inhibition of angiotensin I-converting enzyme (ACE) has become an effective strategy in the treatment of hypertension and cardiovascular disease...
Keywords: Kinetics, molecular modelling, physico-chemical characterisation, protease
04/2006 | Biological Chemistry, Walter de GruyterInhibition of cathepsin L-like proteases by cathepsin V propeptide
The N-terminal propeptide domains of several cathepsin L-like cysteine proteases have been shown to possess potent inhibitory activity...
Keywords: chromatography, Kinetics, prodomain, recombinant, refold, zymogen
05/2007 | Biological Chemistry, Walter de GruyterCalpain proteolysis of insulin-like growth factor binding protein (IGFBP) -2 and -3, but not of IGFBP-1
Calpains are cytoplasmic Ca2+-regulated cysteine proteases that may regulate insulin-like growth factor (IGF)-independent actions of insulin-like growth factor binding proteins (IGFBPs) through IGFBP proteolysis...
Keywords: biosensor analysis, Ca2+ - activation, cleavage site, fragmentation, Kinetics, protease
01/2007 | Biological Chemistry, Walter de GruyterThe role of non-phenolic lignin in chlorate-forming reactions during chlorine dioxide bleaching of softwood kraft pulp
The affect of phenolic hydroxyl groups on the reaction efficiency during chlorine dioxide pre-bleaching of a softwood kraft pulp was investigated...
Keywords: chlorate, chlorine dioxide, inorganic reactions, Kinetics, phenolic hydroxyl groups
02/2005 | Holzforschung, Walter de GruyterHigh-consistency ozonation of hardwood kraft pulp
At present, ozone is one of the main chemicals in elemental chlorine-free (ECF) and totally chlorine-free (TCF) bleaching sequences...
Keywords: brightness, hardwood, hexenuronic acid groups, kappa number, Kinetics, kraft pulp, lignin, Ozone, shrinking core model, viscosity
11/2006 | Holzforschung, Walter de GruyterKinetics and thermodynamics of uranium(VI) sorption on hydrous silica
Sorption of uranyl ion, UO22+, on SiO2· x H2O (silica gel) has been investigated as a function of time, amount of silica gel (0.10–0.60 g), uranium concentration (5.00×10-5–1.00×-3 M), ionic strength (0.20–1.40 M NaClO4), pH (∼2.0–6.0), and temperature (283–333 K)...
Keywords: Kinetics, Thermodynamics, Uranium, Sorption, Silica
09/2007 | Radiochimica Acta, Oldenbourg WissenschaftsverlagNeptunium(V) disproportionation and cation–cation interactions in TBP/kerosene solvent
In 30% TBP/OK Np(V) is unstable and disproportionates to Np(IV) and Np(VI). Np(V) readily coordinates to Np(IV) in solution to form a “cation–cation” complex by bonding through an axial oxo group on Np(V)...
Keywords: Neptunium, Disproportionation, Kinetics, TBP, Near IR electronic absorption spectroscopy
12/2007 | Radiochimica Acta, Oldenbourg WissenschaftsverlagElectrochemical Nucleation and Growth Kinetics of Nanostructured Gold on Rotating Disc and Stationary Electrodes
The kinetics of the electrocrystallization of nanostructured gold is investigated on both rotating disc and stationary glassy carbon electrodes...
Keywords: Nucleation, Kinetics, Growth, nanostructure
09/2007 | Zeitschrift für Physikalische Chemie, Oldenbourg WissenschaftsverlagKinetics and electrochemical studies of uranium in acetate and formate media by cyclic voltammetry
The cyclic voltammetric behavior of uranyl ion was investigated at hanging mercury drop electrode in perchlorate supporting electrolyte...
Keywords: Uranium, Acetate, Formate, Kinetics, Thermodynamics
12/2007 | Radiochimica Acta, Oldenbourg WissenschaftsverlagKinetics of Isotopic- and Ion Exchange in Ternary Mixtures of Cation Exchangers
The kinetics of isotopic exchange Cs+ - Cs+ and ion exchange Cs+ - H+ in a mixture of three cation exchangers was investigated experimentally and theoretically in a concentration range, where film diffusion is the rate determining step...
Keywords: Ion exchange, Isotopic exchange, Kinetics
02/1983 | Zeitschrift für Physikalische Chemie, Oldenbourg WissenschaftsverlagKinetics of Protein Adsorption at a Poly(Acrylic Acid) Brush Studied by Surface Plasmon Resonance Spectroscopy
The kinetics of protein adsorption at a planar poly(acrylic acid) (PAA) brush has been studied by surface plasmon resonance spectroscopy...
Keywords: protein, Polyelectrolyte, Adsorption, Kinetics, SPR
01/2008 | Zeitschrift für Physikalische Chemie, Oldenbourg WissenschaftsverlagElectrodeposition methods in superheavy element chemistry
To prepare electrodeposition experiments with superheavy elements (SHE), their homologs were investigated...
Keywords: Electrodeposition, Underpotential Deposition, Critical potentials, Kinetics, Superheavy element chemistry
02/2008 | Radiochimica Acta, Oldenbourg WissenschaftsverlagRevisiting the mechanism of ?-O-4 bond cleavage during acidolysis of lignin. Part 1: Kinetics of the formation of enol ether from non-phenolic C6-C2 type model compounds
The reaction route of a dimeric non-phenolic C6-C2 type lignin model compound, 2-(2-methoxyphenoxy)-1-(3,4-dimethoxyphenyl)ethanol (
Keywords: acidolysis, alkyl-aryl ether, ?-O-4 bond, enol, Kinetics, lignin
03/2008 | Holzforschung, Walter de GruyterPolyoxometalate (POM) oxidation of lignin model compounds
Various lignin model compounds were oxidized with polyoxometalate (POM), K5[SiVW11O40]·12 H2O, in sodium acetate buffer (
Keywords: Kinetics, lignin model compounds, Oxidation, polyoxometalate (POM)
01/2008 | Holzforschung, Walter de Gruyter