假鹰爪根的化学成分

从番荔枝科假鹰爪属植物假鹰爪(Desmos chinensis Lour.)的根中得到两种结晶,鉴定为4,7-二羟基-5-甲氧基-6-甲基-8-醛基黄烷和5,7-二羟基-6,8-二甲基双氢黄酮(即demethoxy-matteucinol)前者为新化合物,后者则首次从该植物中获得。

Desmosflavanone Ⅱ: A New Flavanone from Desmos cochinchinensis Lour

A new flavanone was isolated from the roots of Desmos cochinchinensis Lour Its chemical structure was elucidated by spectral analysis as 7 hydroxy 5 methoxy 8 formyl 6 methylflavanone, named desmosflavanone Ⅱ

怎样预防葡萄园鸟害

预防葡萄园鸟害可采取以下办法：一是果穗套袋，不仅可防鸟、蜂等动物的为害，而且可有效预防各种病虫害以及药剂、灰尘的污染．生产出优质无公害果实。果袋可选用大号的微孔透气塑膜袋．防效好．价格低；葡萄植株花后15天左右,