Mineral partitioning

Soils and vadose zone information, including soil characteristics (type, holding capacity, temperature, biological activity, and engineering properties), soil chemical characteristics (solubility, ion specification, adsorption, leachability, cation exchange capacity, mineral partition coefficient, and chemical and sorptive properties), and vadose zone characteristics (permeability, variability, porosity, moisture content, chemical characteristics, and extent of contamination)... 

Cheese contains a high concentration of essential nutrients relative to its energy content. Its precise nutrient content is influenced by the type of milk used (species, stage of lactation, whole fat, lowfat, skim), method of manufacture, and to a lesser extent the degree of ripening. As outlined in detail elsewhere in this review, water-insoluble nutrients of milk (casein, colloidal minerals, fat, and fat-soluble vitamins) are retained in the cheese curd whereas the water-soluble constituents (whey proteins, lactose, water-soluble vitamins, and minerals) partition into the whey. However, loss of water-soluble B vitamins in whey may be compensated to a certain extent by microbial synthesis during ripening (Renner, 1987). 

Somatotropin, the P-adrenergic agonists, and the anaboHc steroids are considered metaboHsm modifiers because these compounds alter protein, Hpid, carbohydrate, mineral metaboHsm, or combinations of these and they partition nutrient use toward greater rates of protein deposition, ie, muscle growth, and lesser rates of Hpid accretion. Historical data leading to understanding of the mechanism (s) of action are found in reviews on anaboHc steroids (1), somatotropin (2—4), and the phenethano1 amines (5—7). 

Methyltins are less likely than the butyl- and octyl-tins to partition to sediments, soils, and organic carbon. Modelled data for K c suggest much lower capacity for binding to organic carbon than do measured values, often by several orders of magnitude. Measured data have been used in preference to model environmental fate of the compounds. The compounds also bind strongly to clay minerals, montmorillonite in particular. 

Processes based on fluidized bed coating have been developed (49). In this process, the bioactive agent is dissolved in an organic solvent along with the polymer. This solution is then processed through a Wurster air suspension coater apparatus to form the final microcapsule product. A solvent partition technique based on continuous injection of a polymer-drug solution into flowing mineral oil has been reported (50). 

Stannite is the most common tin sulfide mineral in the ore deposits associated with tin mineralization. This mineral sometimes contains appreciable amounts of zinc, together with iron. Several workers have suggested that the zinc and iron contents of stannite are related to temperature. With respect to the study of the phase relationships in the pseudobinary stannite-kesterite system. Springer (1972) proposed zincic stannite as a possible geothermometer mainly based on the chemical compositions of the two exsolved phases (stannite and kesterite). Nekrasov et al. (1979) and Nakamura and Shima (1982) experimentally determined the temperature dependency of iron and zinc partitioning between stannite and sphalerite. 

Nakamura, Y. and Shima, H. (1982) Fe and Zn partitioning between sphalerite and stannite (abst.). Joint Meeting of Soc. Mining Geol. Japan. Assoc. Miner. Petr. Econ Geol., Mineral. Soc. Japan, A-8 (in Japanese). 

Sasaki, N. and Minato, M. (1983) Effect of the degree of supersaturation upon apparent partition coefficients of lead and strontium ions between BaSOa and aqueous solution. Miner. J., 11, 365-381. 

Mineral-Melt Partitioning of Uranium, Thorium and Their Daughters... 

We make no attempt to discuss the partitioning behavior of U-series elements between aqueous fluids and minerals at ambient conditions. Examples where this behavior is important include uptake of U-series elements by cal cite in speleothems or by bone apatite. Also we do not consider U-series behavior in hydrothermal solutions at high temperatures, such as during dehydration of subducted crust. In both cases complexation behavior in the fluid may play an important role, and at low temperatures kinetic controls may dominate. These are fruitful areas for future experimental study. 

---