The results showed that, in flow-through test, the lowest observed effect concentration (LOEC)for copper, at which significant effects on the survival of the loach were observed, was 41.

根据对现存量的影响,用换水式试验测得铜的最低可观察效应浓度为38μg/L,无可观察效应浓度是19μg/L。

It is pointed out that the angular momentum operator J ^ does not have complete set of eigenvalues and eigenvectors,the dynamical quantity described by angular momentum operator J ^ is non observable,it is not appropriate to treate angular momentum J as a whole.

指出了角动量算符J　^不存在本征值和本征矢量完全集 ,角动量算符J　^不描写一个可观察量以及角动量J不宜作为整体来讨论 。