In this paper an unsteady lubricating model of inlet zone in metal rolling has been es-tablished. The simulation computations show that for the variation amplit
利用微生物菌种(如绿僵菌Metarhiziumsp)产生的11α-羟化酶,催化甾体底物16α,17α-环氧黄体酮(16α,17α-epoxy-4-pregnene-3,20-dione)羟化转化为产物11α-羟基-16α,17α-环氧黄体酮,是当前甾...
The 11α-hydroxylase produced by a microbial st