目的:测定顶羽菊不同提取物对亚硝酸钠的清除能力以及对亚硝胺合成的阻断能力.方法:通过索氏提取法和浸提法提取顶羽菊的活性成分,......

Ab initio calculation is carried out to study the different supposed mechanisms of DNA base alkylation by β-sulphate-ni......