pk1
pk1-
The results showed that PA19 , PA2 and PK1 strains had high nitrogenase activities .
经固氮酶活性测定，PA19、PA2和PK1菌株具有较强的固氮酶活性。
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Discussed in this paper are a class of imprimitive arc-transitive connected Cayley Graphs on Z p × Zp . We prove that , up to a graph isomorphism , there is only one such graph , that is G ( p , r ) [ pK1 ] .
对Zp×Zp上的一类弧传递非本原连通Cayley图进行了讨论，证明了这类图的不同构类型只有一个，即G（p，r）[pK1]。