Toxic Effects of Pb 2 , Cd 2 and Cr （Ⅵ） on Inhibition of Rhodobacter sphaeroides Growth *
Toxic Effects of Pb 2 , Cd 2 and Cr （Ⅵ） on Inhibition of Rhodobacter sphaeroides Growth *
Pb2 、Cd2 和Cr（Ⅵ）抑制球形红细菌生长的毒性效应
Toxic Effects of Pb 2 , Cd 2 and Cr （Ⅵ） on Inhibition of Rhodobacter sphaeroides Growth *
Pb2 、Cd2 和Cr（Ⅵ）抑制球形红细菌生长的毒性效应