The reaction conditions on oxidation of 2 - methylpyridine to 2 - acid by oxidation of potassium dichromate were studied.研究了以2-甲基吡啶为原料,以重铬酸钾为氧化剂,利用化学氧化法合成 2- 吡啶甲酸的反应条件....
...the whole sweep of German social and political history.德国社会政治的完整历史The history of anthrax is intimately associated with the history of bacteriology and infectious disease.炭疽病的历史与细菌学和传染病学的历史是密切相关的....an Oxford Blue who ...