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首页> 外文期刊>Current Science: A Fortnightly Journal of Research >Biodegradation of 1,1-diphenylethylene and 1,1-diphenylethane by Pseudomonas putida PaW 736.
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Biodegradation of 1,1-diphenylethylene and 1,1-diphenylethane by Pseudomonas putida PaW 736.

机译:恶臭假单胞菌PaW 736对1,1-二苯乙烯和1,1-二苯乙烷的生物降解作用。

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摘要

In the present study, the possibility of biodegrading the dechlorinated product of 1,1,1-trichloro-2,2-bis(4-chlorophenyl)ethane (DDT), 1,1-dichloro-2,2-bis(chlorophenyl)ethylene (DDE) and structurally related compound 1,1-dichloro-2,2-bis(chlorophenyl)-ethane (DDD) under aerobic conditions was examined. Since commercial preparation of 1,1-diphenylethane was not available, a structurally related compound, 1,1-diphenylethylene was chosen for the acclimatization of bacterial culture. More than 95% of 1,1-diphenylethylene (initial concentration 500 mg l-1) was degraded by naphthalene degrading Pseudomonas putida PaW 736 within six days. GS-MS analysis revealed the formation of benzophenone as the end-product with residual concentration of 157 mg l-1 after six days of incubation. 1,1-diphenylethane was formed from the complete dechlorination of DDT using Mg0/Pd+4 bimetallic system. P. putida PaW 736 acclimated to 1,1-diphenylethylene was also able to degrade 1,1-diphenylethane (initial concentration 250 mg l-1) using it as the sole source of carbon and energy. More than 80% degradation of 1,1-diphenylethane was observed following 5 days of incubation. However, any metabolites of the biodegradative pathway for the degradation of 1,1-diphenylethane could not be identified.
机译:在本研究中,有可能生物降解1,1,1-三氯-2,2-双(4-氯苯基)乙烷(DDT),1,1-二氯-2的脱氯产物氧条件下,2-2-双(氯苯基)乙烯(DDE)和与结构相关的化合物1,1-二氯-2,2-双(氯苯基)-乙烷(DDD)条件进行了检查。由于1,1-二苯乙烷的商业制备尚不可用,因此选择了一种结构相关的化合物1,1-二苯乙烯用于细菌培养的驯化。萘在六天内降解了恶臭假单胞菌(Pseudomonas putida)PaW 736,降解了95%以上的1,1-二苯乙烯(初始浓度为500 mg l -1 )。 GS-MS分析表明,孵育六天后,最终产物二苯甲酮的形成残留浓度为157 mg l -1 。用Mg 0 / Pd +4 双金属体系对滴滴涕进行完全脱氯反应生成1,1-二苯乙烷。 P以1,1-二苯乙烯为适应物的Putida PaW 736还能够将1,1-二苯乙烷(初始浓度为250 mg l -1 )降解为唯一碳和能源。孵育5天后,观察到1,1-二苯乙烷的降解率超过80%。但是,无法确定降解1,1-二苯乙烷的生物降解途径的任何代谢物。

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