[The optimization of a method for determining RNAse activity by using high-polymer RNA].

Different methods for precipitation of free nucleotides are compared with the aim of improving the method for estimating RNAse activity. The precipitators were 0.75% uranyl acetate in 0.25% HClO4, 96% ethanol with MgCl2 in different concentrations, pure ethanol, and chlorine acid. Measurements of RNAse activity by means of 0.02M MgCl2 in 96% ethanol whose volume is equal to the reaction mixture were the optimal.