There is an incessant interest in transfer of common chemical processes from organic solvents to water, which vital for the development bioinspired and green technologies. Diarylethenes feature...

By an initial solvent screening of 18 solvents, 14 pure good solvents were selected for the crystallization of tolbutamide. Solid generation by the solvent-change method was carried out using the pure good solvents. Crystals were generated in only 10 of the 14 solvents. Different crystal forms of tolbutamide were obtained. Crystals were subjected to evaluation tests such as differential scannin...

abstract in this study, the extraction of carotenoids from a new strain of yeast (sporobolomyces ruberrimus h110) by different chemical and physical methods was investigated. for chemical pretreatment methods, hcl at two different concentrations (0.2 and 0.5 n) and two different temperatures (55 and 75c), and dmso solvent (also at two different temperatures, 55 and 75c) were used. sonication an...

A cluster model for active site of nanotube (C48) was presented and investigated the geometricstructure and thermochemical parameters. Quantum-mechanical calculations were performed at theHF / 510-30, 6-310, 6-3 IG• and 6-310" levels of theory in the gas phase and three solvents atfour temperatures. Also, nuclear shielding parameters of the active site of nanotube have been takeninto account us...

ne"> In this paper, the thermal properties including molar heat capacity, CP, thermal <span style="font-si...

Surface tension is among the most important factors in chemical and pharmaceutical processes. Modeling surface of solvents at different temperatures helps to optimize type solvent temperature. The with their solvation parameters was used this study develop a model based on van’t Hoff equation by multiple linear regression. Abraham parameters, Hansen solubility Catalan are discriminating descrip...

The use of glycosyltransferases in chemoenzymatic oligosaccharide synthesis is attractive, provided that the enzymes are available, since it eliminates the tedious multistep protectiondeprotection and chemical glycosylation procedure that characterizes classic chemical synthesis. The sugar nucleoside diphosphates (sugar-NDPs) that most glycosyltransferases require as glycosyl donors (e.g. UDP-G...

Gregory R. Fulmer,* Alexander J. M. Miller, Nathaniel H. Sherden, Hugo E. Gottlieb, Abraham Nudelman, Brian M. Stoltz, John E. Bercaw, and Karen I. Goldberg Department of Chemistry, University of Washington, Box 351700, Seattle, Washington 98195-1700, Arnold and Mabel Beckman Laboratories of Chemical Synthesis and Caltech Center for Catalysis and Chemical Synthesis, Division of Chemistry and Ch...

A simple and green chemical procedure was reported for the synthesis of dihydropyrimidinones from various aldehydes, ethyl acetoacetate and urea or thiourea using  holmium chloride as catalyst. The reactions were performed under solvent free conditions with ultrasound irradiation as the energy source. The advantages of this protocol include the excellent yield, operational simplicity, short tim...

Paint is a suspension of finely divided pigment particles in a liquid composed of a binder (resin), a volatile solvent or water, and additives that impart special characteristics. The volatile components evaporate from the drying film after application, while the binder holds the pigment in the dry film, causing it to adhere to the substrate. Some high quality, hard gloss paints are referred to...