Aerobic and anaerobic degradation of aldicarb in soils

Ou, Li Tse; Sture, K.; Edvardsson, V.; Suresh, P. R.; Rao, Chetana

doi:10.1021/jf00061a022

Cited by 39 publications

(15 citation statements)

References 9 publications

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“…Similar to the degradation patterns of some órgano sulfur pesticides such as aldicarb (Bromilow et al, 1980;Coppedge et al, 1967;Ou et al, 1985;Smelt et al, 1978) and phorate (Talekar et al, 1977;Walter-Echols and Lichtenstein, 1978), we found that P in Arredondo sand was rapidly oxidized to PSO which was further oxidized to PSO. (Figure 2).…”

Section: Because Of Low Levels Of Extractable C Remaining In Arredondsupporting

confidence: 68%

Degradation and metabolism of Oxamyl and phenamiphos in soils

Rao

1986

J. of Env. Sc. & Hlth., Part B

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Degradation and metabolism of the nonvolatile nematicidesinsecticides [ 14 C]oxamyl and [ 14 C]phenamiphos (P) were investigated using three Southeastern U.S. soils (Arredondo sand, Cecil sandy loam and Grenada silt loam). Oxamyl in moist soils (10 and 33 kPa) was rapidly mineralized to CO 2 , with N,N-dimethyl-2-(methylthio)acetamide oxime (DMAO) being the major intermediate metabolite. Half-lives (t ½ ) for extractable 14 C in [ 14 C]oxamyl treated soils ranged from 8 to 50 d. Although the principal 14 C component in organic solvent extracts was oxamyl, 4 to 27% of applied 14 C in the extracts were found to be associated with metabolites. Consequently, t ½ values for oxamyl would be smaller than t ½ values for extractable 14 C. Oxidation of Ρ to phenamiphos sulfoxide (PSO) in Arredondo soil was rapid. PSO was then slowly degraded to phenamiphos sulfone (PSO 2 ), and at the same time 25

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Section: Because Of Low Levels Of Extractable C Remaining In Arredondsupporting

confidence: 68%

Degradation and metabolism of Oxamyl and phenamiphos in soils

Rao

1986

J. of Env. Sc. & Hlth., Part B

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“…Technical grade carbofuran (99% purity), analytical grade carbofuran phenol (99.3% purity), uniformly ring‐labeled (URL) 14 C‐carbofuran and carbonyl‐labeled (CAL) 14 C‐carbofuran were gifts from FMC Corporation (Princeton, NJ, USA). Prior to use, the two radiolabeled compounds were purified to >98% radiopurity by thin‐layer chromatography (TLC) using preparative silica gel G TLC plates [7,8].…”

Section: Methodsmentioning

confidence: 99%

Carbofuran degradation mediated by three related plasmid systems

Ogram

Duan

Trabue

et al. 2000

FEMS Microbiology Ecology

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Two carbofuran-metabolizing Sphingomonas strains, TA and CD, were isolated from soils with differing histories of exposure to carbofuran. These strains were compared with a previously described strain, Sphingomonas sp. CFO6, with regard to growth rate, formation of metabolites, and plasmid content and structure. Extensive regions of similarity were observed between the three different plasmid systems as evidenced by cross hybridization. In addition, all three systems harbor IS1412, an insertion sequence (IS) element involved in heat-induced loss of carbofuran phenotype in CFO6, and heat-induced carbofuran deficient mutants of all three strains correlated with loss of IS1412. A carbofuran deficient mutant of TA generated by induction of IS elements was complemented by reintroduction of the wild-type plasmid, confirming the presence of genes required for carbofuran metabolism on this plasmid. Carbofuran metabolism in these three strains is clearly linked via plasmids of different numbers and sizes that share extensive common regions, and carbofuran-degrading genes may be associated with active IS elements.

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“…Prior to use, the two radiolabeled compounds were puri¢ed to s 98% radiopurity by thinlayer chromatography (TLC) using preparative silica gel G TLC plates [7,8].…”

Section: Chemicalsmentioning

confidence: 99%

Carbofuran degradation mediated by three related plasmid systems

Ogram¹

2000

FEMS Microbiology Ecology

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Two carbofuran-metabolizing Sphingomonas strains, TA and CD, were isolated from soils with differing histories of exposure to carbofuran. These strains were compared with a previously described strain, Sphingomonas sp. CFO6, with regard to growth rate, formation of metabolites, and plasmid content and structure. Extensive regions of similarity were observed between the three different plasmid systems as evidenced by cross hybridization. In addition, all three systems harbor IS1412, an insertion sequence (IS) element involved in heatinduced loss of carbofuran phenotype in CFO6, and heat-induced carbofuran deficient mutants of all three strains correlated with loss of IS1412. A carbofuran deficient mutant of TA generated by induction of IS elements was complemented by reintroduction of the wild-type plasmid, confirming the presence of genes required for carbofuran metabolism on this plasmid. Carbofuran metabolism in these three strains is clearly linked via plasmids of different numbers and sizes that share extensive common regions, and carbofuran-degrading genes may be associated with active IS elements. ß

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Aerobic and anaerobic degradation of aldicarb in soils

Cited by 39 publications

References 9 publications

Degradation and metabolism of Oxamyl and phenamiphos in soils

Degradation and metabolism of Oxamyl and phenamiphos in soils

Carbofuran degradation mediated by three related plasmid systems

Carbofuran degradation mediated by three related plasmid systems

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