Reference

Effect of herbicides on the activity of nonsymbiotic nitrogen fixation

Effect of herbicides on the activity of nonsymbiotic nitrogen fixation.Some chemicals with cas registry numbers like 330-55-2 and 122-34-9 are also used. Tolkachev, N. Z.; Zubko, I. K. (Vses. Nauchno-Issled. Inst. S-kh. Mikrobiol., Leningrad, USSR). Pochvovedenie, (3), 145-9 (Russian) 1977. CODEN: PVDEAZ. DOCUMENT TYPE: Journal CA Section: 5 (Agrochemicals) Section cross-reference(s): 19 Herbicide concns. inhibiting N fixation by 50% in the samples of sod-podzolic soils were 13.8 mg 2,4-D amine salt [2008-39-1], 25.1 mg 2M 4KhM [94-81-5], 875 mg simazine [122-34-9], 847 mg linuron [330-55-2], 960 mg Patoran [3060-89-7], 62 mg Aresin [1746-81-2], 891 mg fenuran [101-42-8], and 2227 mg meturin [6263-38-3]/kg. .

Use of isotope tracer techniques for studying pesticide residues in meat with particular reference to the effects of processing

Use of isotope tracer techniques for studying pesticide residues in meat with particular reference to the effects of processing. Part of a coordinated program on the fate and significance of foreign chemical substances in food. Mirna, A. (Bundesanst. Fleischforsch., Kulmbach, Ger.). Report, IAEA-R-1002-F, 23 pp. Avail. INIS From: INIS Atomindex 1977, 8(4), Abstr. No. 290099 (English) 1976. DOCUMENT TYPE: Report CA Section: 17 (Foods) The possibility of reducing DDT [50-29-3], BHC [58-89-9], and monolinuron (MLN) [1746-81-2] residues in meat products by microbial activity and other methods was investigated. Muscle and fat tissue of rabbits fed with 14C-labeled pesticides were used. In culture media micrococci and molds metabolized DDT mainly to DDD within 2 weeks. Reductive dechlorination from DDT to DDD was frequently observed under anaerobic conditions; in aerobic media as, e.g., in sausage mixts., this reaction was ineffective. .gamma.-BHC [58-89-9] was biodegraded by 30% and MLN by 10-20%, mainly to unidentified products. Two strains of lactobacilli tested were ineffective in degrading DDT and degraded .gamma.Several reagents with their cas registry numbers 14797-65-0 and 58-89-9 are used here.-BHC only by .apprx.10%. The enzymic degrdn. of DDT and .gamma.-BHC in muscle mitochondria (released after freezing) was insignificant, while MLN was metabolized by .apprx.15%. In well-homogenized, enzyme-rich liver sausage mixts. with NaCl, DDT and .gamma.-BHC were metabolized generally to a greater extent, (40% and 30% resp. after 2 days) than in mixts. with NPS or NPS and NaASC (10% and 20%, resp.). In sterilized liver sausage the corresponding figures were 31% and 22-11% for DDT and 84% and 39-12% for .gamma.-BHC. In culture media the formation of nitrite from nitrate was retarded by as little as 1.0 ppm DDT which may cause disturbances in the prodn. of fermented meats. The most effective treatment to eliminate DDT from meat was curing with 10% NaCl and 0.015% KNO (sic) (residues decreased by 39%) followed by hot smoking (25%) and cooking (6%). In case of .gamma.-BHC cooking reduced the residues by 65% while curing by 20% and hot smoking by 12%. Decrease of .gamma.-BHC residues in sausages appeared to be due mainly to volatilization through the casings. For MLN about 50% of the radioactivity was removed by curing, smoking, or cooking. .