Dimethylpyrazine reacted with phenylacetic acid, silver nitrate and ammonium persulfate.
2
二氧化氮是硝酸盐气溶胶的主要来源，构成PM 2.5和在紫外线下臭氧的主要部分。
NO2 is the main source of nitrate aerosols, which form an important fraction of PM2.5 and, in the presence of ultraviolet light, of ozone.
3
为了研究熊胆的防癌作用，进行了亚硝酸钠清除实验和对二甲基亚硝胺合成阻断实验。
To study the effects of bear bile on cancer prevention, the experiment of cleaning nitrite and blocking synthesis of dimethylnitrosamine in vitro was carried out.
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