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Showing 1 to 20 of 123 for “"partition coefficients"”.
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Experimentally generated partition coefficients for the first-row transition elements during eclogite partial melting at three gigapascals
… experimental study provides measurements of the partitioning of the first-row transition elements (FRTE) between eclogite and melt, which could be used to fingerprint the source lithology of ocean island basalts (OIB) and infer participation of recycled lithologies in their generation. My simple …
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THE USE OF EXPANDED ENSEMBLE FOR THE PREDICTION OF WATER-ORGANIC SOLVENT PARTITION COEFFICIENTS OF SMALL DRUG-LIKE MOLECULES
The logarithm of the partition coefficient (logP) between water and a nonpolarsolvent is commonly used to characterize a molecule’s hydrophobicity. This metric serves as a key predictor of lipophilicity and membrane permeability— critical factors in determining a molecule’s bioavailability. As a …
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Anticipation nationwide risks to drinking water : predicting local scale contamination of community supply wells by gasoline additives
… estimated abundances in gasoline, gasoline-water partition coefficients (Kgw), and estimated organic matter-water partition coefficients (Kom). Transport calculations were conducted for 17 polar and four nonpolar compounds currently proposed for or found in contemporary U.S. gasolines, including …
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Bioavailability of organic contaminants in sediments.
… extractable proportions and sediment-water partition coefficients) that describe the availability of these contaminants in the environment. Equilibration between sampler and sediment for PAHs and CBs was found to be adequately achieved after 20 days shaking of a silicone rubber sampler in …
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Optimization of sequential purification of beta-glucosidase from tricoderma reesei in aqueous two-phase system
… was further purified from other proteins by partitioning in aqueous two-phase systems. Preliminary investigation with pure beta-glucosidase showed that the ATPS composed of PEG 4000, Potassium Phosphate salt and water is the best system for extracting the enzyme. The influences of system …
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Determination of descriptors by liquid-liquid partition and chromatographic methods
… <p>DETERMINATION OF DESCRIPTORS BY LIQUID-LIQUID PARTITION AND CHROMATOGRAPHIC METHODS</p> <p> by</p> <p>THUSHARA KARUNASEKARA</p> <p>September 2012</p> <p>Advisor: Prof. Colin F. Poole</p> <p>Major: Chemistry (Analytical)</p> <p>Degree: Doctor of Philosophy</p> <p> Partition coefficients for …
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Interactions of Flavor Compounds With Food Solids and Their Application to Volatile Retention During Drying
… food solids were studied by measuring air-liquid partition coefficients of volatiles, sorption capacities of solids in aqueous solutions and in dry forms, and changes in thermodynamic parameters upon adsorption. The information gathered from studies on the interactions was related to the data on …
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A STUDY OF ORGANOGELS AND THEIR SOLUTE INTERACTIONS
… materials was found to be 1.05 g/ml. The partition coefficients for the interaction of solute molecules (substituted phenols, anilines, naphthols) with the organogels were found to be in the range of 1.3 to 500. These partition coefficients are roughly 40 times less relative to the …
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Biosorption of uranium and its effect on uranium transport in groundewater
… of uranium sorption to minerals. Then, the partition coefficient between U(VI) and the microbial species Geobacter uraniireducens and Acholeplasma palmae were experimentally determined. The experimentally obtained partition coefficients were used to incorporate biosorption into a …
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Physical and chemical constraints on core - mantle differentiation in terrestrial planets.
… fugacity on the liquid metal - liquid silicate partitioning behaviour of the elements Ta, Nb, V, Cr, Si, Mn, Ga, In and Zn have been studied experimentally over a wide range of high-P and high-T conditions of 2-24 GPa, 1750-2600°C and at low oxygen fugacities of -1.3 to -4.2 log units below the …
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Basalt petrogenesis beneath slow- and ultraslow-spreading Arctic mid-ocean ridges
… clinopyroxene (Cpx)melt and garnet (Gt)-melt partition coefficients during silica-poor garnet pyroxenite melting for a suite of trace elements, including U and Th, at 2.5GPa and 1420-1450°C. Partition coefficients range from 0.0083+0.0006 to 0.020+0.002 for Th and 0.0094+0.0006 to 0.024+0.002 …
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Effects of plasma proteins on the sieving of macromolecular tracers in the kidney
… commonly been probed by measuring the sieving coefficients of a variety of tracers, both proteins and exogenous polymers, across the intact glomerular barrier and across isolated components of the GCW. It was found previously that the sieving coefficients of the tracers Ficoll and Ficoll …
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Applications of Melt Inclusions to Problems in Igneous Petrogenesis
… assimilation, and partial melting. Partition coefficients were determined for syngenetic clinopyroxene, orthopyroxene, and plagioclase in equilibrium with a dacitic melt using the Melt Inclusion-Mineral (MIM) technique. Melt inclusion chemistry is the same regardless of mineral host …
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Basalt petrogenesis beneath slow- and ultraslow-spreading Arctic mid-ocean ridges
… clinopyroxene (Cpx)- melt and garnet (Gt)-melt partition coefficients during silica-poor garnet pyroxenite melting for a suite of trace elements, including U and Th, at 2.5GPa and 1420-1450°C. Partition coefficients range from 0.0083±0.0006 to 0.020±0.002 for Th and 0.0094±0.0006 to 0.024±0.002 …
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Model-based Exploration of Chemical Absorption and Metabolism Kinetics in the Human Gastrointestinal Tract
… of both transmembrane permeability and partition coefficients. The results show that permeability and partition coefficients interactively control Fabs. Consequently, when assessing the Fabs of CECs, both chemical properties must be considered.
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The interaction between silicate minerals and C-O-H bearing melts in the Earth's mantle
… model are constrained through the mineral melt partition coefficients of both H2O and K2O, which imply melting at near adiabatic temperatures. The H2O concentrations of mineral phases within the peridotite assemblages were also measured using an ion probe and elastic recoil detection analysis. …
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ΣΥΝΘΕΣΗ ΚΑΙ ΦΑΡΜΑΚΟΧΗΜΙΚΗ ΜΕΛΕΤΗ ΜΕΡΙΚΩΝ ΥΠΟΚΑΤΕΣΤΗΜΕΝΩΝ ΜΟΡΦΟΛΙΝΩΝ ΜΕ ΒΙΟΛΟΓΙΚΟ ΕΝΔΙΑΦΕΡΟΝ
… IS STUDIED. IONIZATION CONSTANTS (PKA'S) AND PARTITION COEFFICIENTS (N-OCTANOL-WATER OF THE SYNTHESIZED MORPHOLINES ARE DETERMINED EXPERIMENTALLY. THE RESULTS ARE DISCUSSED IN TERMS OF CONFORMATIONAL, INDUCTIVE AND STERIC EFFECTS. THE VALUES OF THE TWO ABOVEMENTIONED PHYSICOCHEMICAL PARAMETERS …
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Sorption and bioaccumulation of neutral and ionizable wastewater-derived contaminants of emerging concern: exposure of edible crops via solid and liquid effluent streams
… different sludges. Organic carbon normalized partition coefficients (log K[subscript oc]) were correlated with octanol-water partition coefficients (log K[subscript ow]) for nonionized CECs, and log D[subscript ow] for anionic CECs where log D[subscript ow] is greater than 2. Data were used to …
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Evaluation of different in vitro surrogates to represent nonspecific binding for tissue: plasma water partition coefficient predictions
… accurate prediction of the tissue: plasma water partition coefficients (Kp,m) has become increasingly important. In these predictions, drug-lipid interactions have been traditionally described using the octanol: water partition coefficient (logP) and the vegetable: oil: water partition …
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