The samples of \%Ginkgo biloba \%L. leaves of 30 years old tree were collected from April to November in Nanjing and were extracted with petroleum ether (60～90℃), purified with silical gel and analysed by HPLC. The ...The samples of \%Ginkgo biloba \%L. leaves of 30 years old tree were collected from April to November in Nanjing and were extracted with petroleum ether (60～90℃), purified with silical gel and analysed by HPLC. The results showed that the content of polyprenols in \%Ginkgo biloba \%leaves grew up month by month, while the yellow leaves had the highest content about 1.1% in fall. The main polyprenol was C\-\{85\}, about 38% content and the next was C\-\{90\}, about 32%. On the other hand, by analysing the leaves of young tree of 3～5 years old in Pizhou city, Jiangsu Province collected in fall, the main was polyprenol of C\-\{90\}about 34%～35%, the second was polyprenol of C\-\{85\}about 24%～25%, compared with the leaves of old tree collected at the same time, the total content of polyprenols in the leaves of young tree was higher.展开更多
文摘The samples of \%Ginkgo biloba \%L. leaves of 30 years old tree were collected from April to November in Nanjing and were extracted with petroleum ether (60～90℃), purified with silical gel and analysed by HPLC. The results showed that the content of polyprenols in \%Ginkgo biloba \%leaves grew up month by month, while the yellow leaves had the highest content about 1.1% in fall. The main polyprenol was C\-\{85\}, about 38% content and the next was C\-\{90\}, about 32%. On the other hand, by analysing the leaves of young tree of 3～5 years old in Pizhou city, Jiangsu Province collected in fall, the main was polyprenol of C\-\{90\}about 34%～35%, the second was polyprenol of C\-\{85\}about 24%～25%, compared with the leaves of old tree collected at the same time, the total content of polyprenols in the leaves of young tree was higher.
基金supported by the National Natural Science Foundation of China(No.30771690)the Specific Fund for Public Interest Research of Traditional Chinese Medicine,Ministry of Finance(No.200707008)National Technology Pedestal Program(No.2007BA130B04)
