"Hydrotropic solutions are aqueous salt solutions which effect increased solubility of substances insoluble or slightly soluble in water at the same temperature. It is a salting-in effect as compared with the more commonly known salting-out effect. Relatively concentrated salt solutions are required to effect a marked change in solubility of the third component. In general, the third component is reprecipitated by diluting with two to three volumes of water. The solvent may then be made ready for re-use by reconcentration by evaporation."
The temporal subdomain method based on the Ritz-Galerkin method is investigated as a method for the solution of space-time dependent neutron dynamics equations. In the temporal subdomain finite element method, the time domain is divided into subdomains and within each subdomain the unknown coefficients of the time dependent trial functions are determined by making the residual of an appropriate functional orthogonal to the step function.
This dissertation is divided into four parts consisting of (1) an introduction to stagewise processes; (2) a summary of investigations appearing in the literature; (3) the detailed application of finite calculus to the stagewise operations of extraction, gas absorption and fractionation; and (4) an appendix containing the elements of the finite calculus and a few numerical solutions of problems presented in part (3).
This thesis is a kinetic study of the vapor phase addition of hydrogen chloride to propylene using activated alumina es a catalyst. Preliminary work on this reaction showed first, that isopropyl chloride is the only gaseous product formed at temperatures of 80°C or less when this catalyst is used. Second, the catalyst activity decreases with time possibly due to the formation of non-volatile polymerized product on the surface. The rate of decreasing catalyst activity is dependent on the temperature and on the conversion.
This research is an ethnographic study of literacy as a socially constructed process, literacy viewed as a part of the acquisition and transmission of culture. The focal population was a group of low SES high school students, most of whom were African American, and their children (ages 7 weeks to 4 years), several of whom were enrolled in a day care center housed within the large, urban high school their parents attended in a midwestern U.S. city. The research was an attempt to understand the kinds of literacy, specifically the types and amounts of reading and writing, that were a part of the home and school lives of the student/parents, and their parents, and a part of the home and day care lives of their children.
A study was made of the kinetics of the liquid phase hydrogenation of cyclohexene in the presence of a platinum catalyst in a stirred semi-flow system. The effects of catalyst concentration, hydrogen flow rate, reactor pressure, stirring rate, agitator and reactor design upon the observed rate of reaction were evaluated experimentally, and are qualitatively explained by the hydrodynamics of the stirred system.