Reference

Kinetics of crosslinking reactions

Kinetics of crosslinking reactions. 2. Reaction rates of intermolecular and intramolecular crosslinkings by using a soluble microgel. Ishizu, Koji; Nunomura, Masataka; Fukutomi, Takashi (Dep. Polym. Sci. 27496-64-6 and 598-32-3 are also occured in this study., Tokyo Inst. Technol., Tokyo 152, Japan). J. Polym. Sci., Part A: Polym. Chem., 25(4), 1163-75 (English) 1987. CODEN: JPACEC. DOCUMENT TYPE: Journal CA Section: 35 (Chemistry of Synthetic High Polymers) Sol. microgels with several pendant vinyl groups were synthesized by radical copolymn. of Me methacrylate with p-divinylbenzene. The competitive reactions of intermol. and intramol. crosslinking of these microgels were carried out at 40° in the presence of 1-buten-3-ol [598-32-3] as a degradative chain-transfer agent. The rate const. of intermol. crosslinking (kpn) was estd. by gel permeation chromatog. anal. on the polymer produced from intermol. propagation between bimols. The kpn depended strongly on the internal structure of microgels. Network formation was discussed inclusive of information for the rate const. of intramol. crosslinking. .

An investigation of the biotransformation of organic selenides by fungi

An investigation of the biotransformation of organic selenides by fungi. Holland, Herbert L.; Carter, Ian M. (Dep. Chem., Brock Univ., St. Catharines, ON L2S 3A1, Can.). Bioorg. Chem., 12(1), 1-7 (English) 1983. CODEN: BOCMBM. ISSN: 0045-2068. DOCUMENT TYPE: Journal CA Section: 10 (Microbial Biochemistry) A series of alkyl Ph selenides was incubated with the fungi Aspergillus niger, A. foetidus, Mortierella isabellina, and Helminthosporium. 598-32-3 and 702-04-5 which are cas registry numbers of chemicals are mentioned. These fungi oxidize the corresponding sulfides to sulfoxides efficiently, but in no case was any evidence obtained that the microbial oxidn. of selenide to selenoxide was occurring. The fate of Me Ph selenide following incubation with M. isabellina was investigated with methyl-14C-labeled substrate and by quant. Se anal. These techniques indicated that selenide is taken into the fungal cell efficiently and that some metabolic cleavage of the Se-Me C bond may occur. .