[Construction of a stable genetically engineered microorganism for degrading HCH & methyl parathion and its characteristics].

A GEM designated as BHC-A-mpd, capable of simultaneously degrading of methyl parathion (MP) and HCH was successfully constructed by random insertion of a methyl parathion hydrolase gene (mpd) into chromosome of a HCH-degrading strain BHC-A with the mini-Tn-transposon system. The growth and degrading characteristics of BHC-A-mpd was compared with the original strain BHC-A, and the result showed that there was no difference in this two aspects, A600 nm of BHC-A-mpd in LB medium could reach 2.5 in logarithmic period, which was the same as that of the original strain BHC-A.

[Isolation, identification and characteristics of a phoxim-degrading bacterium XSP-1].

A bacteria strain XSP-1 capable of utilizing phoxim as sole carbon source was isolated from sludge collected from a pesticide manufacturer. It was preliminarily identified as Delftia sp. according to its physiological-biochemical analysis and the similarity analysis of its 16S rRNA gene sequence (GenBank Accession No.

[Bioremediation of fenpropathrin-contaminated soil by Sphingomonas sp.JQL4-5].

JQL4-5 (Sphingomonas sp.), a fenpropathrin-degrading strain isolated from soils exposed to repeated pesticides contamination, was used in this work to study factors affecting its degrading capacity of fenpropathrin in soil microcosms. In sterilized soil, the degradation rates of fenpropathrin by JQL4-5 were faster than those in unsterilized soil.

[Isolation, identification and characteristics of a fenpropathrin-degrading bacterium JQL4-5].

A bacterium capable of utilizing fenpropathrin as sole carbon source was isolated from activated sludge collected from wastewater treating system of a pesticide manufacturer. This bacterium was identified as Sphingomonas sp. according to its physiological & biochemical analysis and the similarity analysis of its 16S rDNA sequence (GenBank Accession No.