El Kheir Y M, El Tohami M S
J Trop Med Hyg. 1979 Nov-Dec;82(11-12):242-7.
The molluscicidal activity of Gnidia kraussiana Meisn leaf, stem and root was studied. Each morphological part was extracted with cold and boiling water, different organic solvent and successively with organic solvents of increasing polarity. Throughout it was found that the extracts of the root were the most potent followed by the stem. Boiling water extracts were more potent than cold water extracts, while in case of extraction with different organic solvents, the petroleum ether extracts of the root and stem were the most potent, while for the leaf, the ethanolic extract was the most potent. On successive extraction, the petroleum ether extracts of all organs were the most potent. Saponification of the petroleum ether extract of the root was carried out and the activity of the different fractions were tested. Different extract fractions were obtained from the 80 per cent ethanolic percolate of the root. Some of the physical properties and the phytochemical screening of the successive extractives of the three organs were studied.
对克劳斯氏格尼草的叶、茎和根的杀螺活性进行了研究。每个形态部位分别用冷水、沸水、不同有机溶剂以及极性递增的有机溶剂依次进行提取。研究发现，根提取物的活性最强，其次是茎提取物。沸水提取物比冷水提取物活性更强，而在用不同有机溶剂提取时，根和茎的石油醚提取物活性最强，对于叶来说，乙醇提取物活性最强。在连续提取时，所有器官的石油醚提取物活性最强。对根的石油醚提取物进行了皂化处理，并测试了不同馏分的活性。从根的80%乙醇渗漉液中获得了不同的提取物馏分。对三个器官连续提取物的一些物理性质和植物化学筛选进行了研究。
