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

羰化合既是大气光化学反应的产，通过光化学反应成羧酸、羟自由、和过乙酰硝酸酯。

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气漂白、漂白、过化氢漂白、光催化漂白、过酸漂白中碳水化合的保护措施。