They are formed byatmospheric photochemistry reaction, and could product OH radical, alkyl radical, ozone,carboxylic acid peroxyacetyl nitrates by atmospheric photochemistry reaction.

羰化合物既是大气化学反应的产物，又能化学反应成羧酸、羟、臭氧和氧乙酰硝酸酯。

In this paper, the protection measures of carbohydrate during pulp TCF bleaching, such as oxygen, ozone, peroxide, peracid and photochemistry reaction of bleaching, were respectively.

摘要本文综述了纸浆的氧气漂白、臭氧漂白、氧化氢漂白、催化漂白、氧酸漂白中碳水化合物的保护措施。