偶氮杂环丙烷是一类重要的 、 环内张力颇大的化合物.The diazirines are interesting , highly strained ring systems.当微量变形能使加载条件发生颇大改变时,就会产生颇大的差异.Appreciable differences may occur, however, when small deformations considerably alter the loading cond...
The region began to use quinine successfully as a prophylactic.该地区开始成功地用奎宁作为预防剂。Epitope - based vaccines provide a new strategy for prophylactic and therapeutic application of pathogen - specific immunity.表位疫苗为用特定病原菌的免疫性...