This paper has reported the new technique of distilling sodium zinc chlorophyllin from waterlettuce leaves.
本文报道了以水浮莲叶为原料提取叶绿素锌钠盐的新方法，同时探讨正交试验优化的工艺条件。
2
The paper provides the theoretical basis for protecting and harnessing the ecological environment of Wanfeng lake by analyzing the reason of waterlettuce pollution.
为探索万峰湖水白菜发生原因，在调查与取样分析的基础上，对万峰湖水质现状进行了评价与分析。
3
Accumulation of pirimicarb in sludge, grass carp, duckweed and waterlettuce increased with time. In the meantime, concentration of pirimicarb in aquatic phase decreased continuously.