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Solubility Values (solubility + value)

Distribution by Scientific Domains

Chemistry	75%

Selected Abstracts

Kinetic and Thermodynamic Solubility Values of Some Bioactive Compounds

CHEMISTRY & BIODIVERSITY, Issue 11 2009
Elham Shoghi
Abstract Thermodynamic solubility is a decisive physicochemical property in drug development. The Chasing Equilibrium method offers an alternative to the classical procedures to measure the solubility of compounds with acid,base properties. The method is fast and yields accurate results. In this work, the solubility of several compounds including acids and bases was determined through the Chasing Equilibrium approach. A study of experimental conditions in terms of sample weight was performed to measure solubilities. The study shows that only a limited range of weights, depending on the nature and solubility of the compounds, is adequate to obtain reliable results. [source]

In vitro bioaccessibility of iron and zinc in fortified fruit beverages

INTERNATIONAL JOURNAL OF FOOD SCIENCE & TECHNOLOGY, Issue 6 2009
Antonio Cilla
Summary Iron and zinc bioaccessibility was estimated in the in vitro gastrointestinal digests of six different fortified fruit beverages (Fb) containing iron and/or zinc and/or skimmed milk (M). Solubility values can be used to establish trends in relative bioavailability of iron and zinc, as the first stage towards mineral bioavailability comprises solubility in the intestinal tract. FbFe, FbFeM and FbFeZnM samples showed iron bioaccessibility above 88%, differing (P < 0.05) from those of FbFeZn (53%). In turn, FbZn, FbFeZn and FbZnM samples presented higher zinc bioaccessibility (above 68%), differing (P < 0.05) from those of FbFeZnM (48%). The presence of milk-derived caseinophosphopeptides (CPPs) formed during gastrointestinal digestion in dairy samples does not increase iron or zinc bioaccessibility in FbFeM or FbZnM vs. FbFe or FbZn, but it is hypothesised that the negative interacting effect of zinc upon iron bioaccessibility when co-supplemented in these fruit beverages is overcome in the presence of CPPs, which favour iron solubility more than in the case of zinc. [source]

Mineral solubility of Panicum maximum with four herbaceous forage legume mixtures incubated in the rumen of N' Dama steers

ANIMAL SCIENCE JOURNAL, Issue 3 2009
Festus T. AJAYI
ABSTRACT This study was designed to determine the mineral concentration and bioavailability of iron (Fe), phosphorus (P), calcium (Ca) and sodium (Na) of mixtures of Panicum maximum (Panicum) with Lablab purpureus (Lablab), Centrosema pubescens (Centro), Stylosanthes guianensis (Stylo), and Aeschynomene histrix (Histrix) in a fistulated N'Dama steer. The solubility of minerals was determined by an in sacco method by incubating ground samples of these forages in the rumen at 0, 6, 12, 24, 48 and 72 h. The mineral solubility characteristics of the forages were evaluated using the equation PD = a + b (1 , e,ct). The result showed that Panicum intercropped with legumes had better crude protein (CP) (av. 9.22% DM) and ash content (av. 2.22% DM) than sole Panicum which gave 7.63% DM and 1.84% DM for CP and ash contents respectively. The highest value of CP of 23.29% DM and ash content (3.96% DM) was obtained for Lablab. The mineral content values of the intercrop were higher than the sole Panicum. Higher mineral content values were obtained in the sole legumes. Iron solubility values of b and potential degradation (PD) which were 58.71% and 87.92% respectively were for Panicum/Histrix mixtures. Calcium solubility values ranged from 30.0% in Panicum to 46.0% in Panicum/Lablab mixture for b fraction. P solubility ranged from 28.0% and 46.0% for b and PD fractions in Panicum to 43.0% and 71.0% in Panicum/Centro mixture respectively. The solubility of the legumes was higher in Na for b fraction (av. 42.0%) and PD fraction (av. 60.0%). Higher values of b (av. 38.0%) and PD (av. 52.0%) were obtained for the mixtures than for sole Panicum. This study revealed that intercropping Panicum with either of the herbaceous forage legumes used for this experiment would increase the Ca, P, Na and Fe contents of the grass. [source]

Higher Gas Solubility in Nanoliquids?

CHEMPHYSCHEM, Issue 1 2008
Sylvain Miachon Dr.
Beyond Henry's law: In nanometer-confining media, gas solubility increases widely (see figure). H2, CH4 and C2H6 solubility values in two solvents are obtained by quantitative 1H NMR spectroscopy. A mass-balance model involving the gas,liquid interface zone agrees well with the observed variation. [source]