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Heavy metals contamination is a major environmental issue, and phytoremediation is a promising, environmentally friendly alternative to conventional cleanup techniques for heavy metal contaminated sites. In this study, the synergistic enhance effects of melanin with two endogenous antioxidants, viz., glutathione (GSH) and ascorbic acid (SA), on the enhancement of the toxicity tolerance of Cd on Sedum...
To investigate the biosynthetic genes and the biological functions of carotenoids in the radioresistant mechanisms of the extremely radioresistant bacterium, Deinococcus radiodurans, two colorless mutants knocking out of the phytoene synthase (crtB) and phytoene desaturase (crtl) genes were constructed by PCR and in vivo homologous recombination. The carotenoids of this bacterium were extracted and...
Partial nitrification to nitrite was reported to be technically feasible and economically favorable, which can be obtained by selectively inhibiting nitrite oxidizing microorganisms through many ways. This paper studied the effect of low DO(dissolved oxygen) concentration and the variation modes of DO on nitritation in SBR The results showed that low DO concentration throughout the SBR cycle led to...
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