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

羰基合物既是大气光应的产物，又能通过光应成羧酸、羟基自由基、臭氧和过氧酸酯。

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、过氧氢漂白、光催漂白、过氧酸漂白中碳水合物的保护措施。