Reference

N-Nitrosothiazolidine and nonvolatile N-nitroso compounds in foods

N-Nitrosothiazolidine and nonvolatile N-nitroso compounds in foods. Sen, Nrisinha P.; Seaman, Stephen W.; Baddoo, Philander A. (Food Res. Div., Food Dir., Ottawa, ON K1A 0L2, Can.). Food Technol. (Chicago), 39(1), 84-8 (English) 1985. CODEN: FOTEAO. ISSN: 0015-6639. DOCUMENT TYPE: Journal CA Section: 17 (Food and Feed Chemistry) Section cross-reference(s): 4 A method of N-nitrosourea [13010-20-3] detn. in food is described which uses the chem. denitrosation-thermal energy anal. method of N. P. Sen and S. Seaman (1983) as the final step. Detection limit was 10 ppb. Two methods involving gas chromatog.-thermal energy anal. are also described for detg. nitrosothiazolidine [73870-33-4] and N-nitrosothiazolidine-4-carboxylic acid [5025-82-1] in food. The 2 compds. were detd. in various cured meats and fish and the results are tabulated.

Active duodenal transport of calcium-45

Active duodenal transport of calcium-45. Implied molecular mechanisms and possibilities of regulation in advanced age by synthesis therapy. Dobre, Victoria; Serban, M. (Inst. Sci. Biol., Bucharest, Rom.). Rev. Roum. Biochim., 14(4), 241-6 (French) 1977. CODEN: RRBCAD. ISSN: 0001-4214. DOCUMENT TYPE: Journal CA Section: 1 (Pharmacodynamics) Section cross-reference(s): 13 In rats, 3-acetyl-4-thiazolidinecarboxylic acid [5025-82-1] restored the intestinal transport of Ca which decreased with age. The mechanism of action involved the restoration of Ca-Mg dependent ATPase [9000-83-3] and alk. phosphatase [9001-78-9] activity. Decreased enzyme activity was due to lowered levels of Ca-transport proteins.