Suchergebnisse

Gai shu gao xuan qu zai dang dai ju yu te shu zhong yao di wei de min yi dai biao ji gou "Li fa yuan" zuo wei tan tao nu xing can zheng biao xian de ju jiao dian, cong xing bie guan xi jiao du tou shi "Li fa yuan" yun zuo guo cheng de zheng zhi sheng tai, tan tao nu xing jin ru gong lin yu, xiang you jue ce quan dui fu nu yun dong de zuo yong ji dui zheng zhi de ying xiang. wan zheng cheng xian le zhan hou ban ge duo shi ji Taiwan she hui de bian qian, bing dui ci tu chu Taiwan nu xing zhu yi yun dong fa zhan dui nu xing can zheng de tui dong zuo yong, dui yu 20 shi ji 50, 50 nian dai Taiwan nu xing can zheng yu yi miao shu. Taiwan nu xing zhu yyu yun dong yi 70 nian dai de xin nu xing zhu yu yun dong wei qi dian, 80 nian dai jian you gui mo, 90 nian dai yi lai ji xu peng bo fa zhan, ban zhi yi xue shu nu xing zhu yi de ri jian fan rong. Qi zhong, nu xing zai zheng zhi sheng huo zhong can yu zhong de ju ti biao xian shi ben shu zong dian

Organophosphorus compounds (OPCs), including highly toxic nerve agents and pesticides, have been used widely in agricultural and military applications. However, they have aroused widespread concern because they persistently pollute the environment and threaten human life. Organophosphorus acid anhydrolase (OPAA) is a promising enzyme that can detoxify OPCs. Here, a novel OPAA (OPAA114644) was isolated and characterized from deep-sea sediment (−3104 m). It exhibited excellent alkaline stability, and the loss of activity was less than 20% in the pH range 5.0–9.0, even after being incubated for 30 d at 4 °C. It also exhibited high salt tolerance, and its enzymatic activity increased by approximately fourfold in the presence of 20% NaCl (w/v). Additionally, OPAA114644 exhibited high degradation efficiency for soman, dichlorvos, paraoxon, coumaphos, and chlorpyrifos with a concentration of up to 250 mg/L, with the degradation rate being 100%, 100%, 100%, 80% and 51%, respectively, in 20 min under optimal conditions. Notably, OPAA114644 dissolved in different solutions, such as 20% NaCl, 1 mM SDS, 0.05% soap, 10% methanol, and tap water, could efficiently decontaminate the residual paraoxon on the surfaces of glasses, cotton tissues, and apples. These results indicate that OPAA114644 has excellent potential for the biodegradation and bioremediation of OPCs pollution and represents a real application of OPAA in the decontamination and detoxification of foods and clothes, and in the remediation of sites such as floors. Deep-sea sediment might also be an abundant resource for various functional microorganisms and enzymes.