莲藕多酚薄层层析分离鉴定研究

[目的]为分离和鉴定莲藕中的多酚奠定基础。[方法]利用薄层层析色谱法,以硅胶G60为固定相,以甲苯-乙酸乙酯-冰醋酸为流动相,以儿茶素为对照品,用FeCl3-K3Fe（CN）6为显色剂,对莲藕多酚酯相组分中酚类物质进行分离和鉴定,并分析不同的展开剂对组分分离的影响。[结果]莲藕多酚酯相展开的第2个斑点与标准品儿茶素所对应的斑点Rf值相同,初步确定莲藕多酚酯相中有儿茶素成分。薄层层析利用所选的6种展开剂均得到很好的分离效果,其Rf值在0.49-0.61范围内,符合薄层层析中Rf值定性的要求。[结论]薄层色谱高效、灵敏、快速,为初步鉴定莲藕中的儿茶素化合物提供了较好的检测方法。

消脂宁片质量控制的研究

目的 :建立消脂宁 (xiaozhining)片质量控制方法。 方法 :用薄层层析法 (TLC)鉴定消脂宁片中的黄芩、丹参、大黄、益母草成分。用高效液相色谱法 (HPLC)测定消脂宁片中大黄素含量。 结果 :TLC法对处方中四种主要成分鉴定结果满意 ;HPLC法测定大黄素含量 ,回归方程为A =2 .4 3× 10 7C +6 .0 6× 10 4(r =0 .9997) ,在 0 .0 5～ 0 .5mg/ml范围内线性关系良好 ,加样回收率为 96 .70 % ,相对标准差 (RSD) =1.0 6 % ,3批供试品中大黄素含量平均值为 0 .0 2 14mg/片 ,RSD =1.5 4 %。方法稳定可靠。 结论

丝瓜叶化学成分研究(Ⅳ)

从丝瓜叶中分得化合物L—11和L—12,经光谱分析和薄层层析鉴定为人参皂甙Rg1(L—11)和人参皂甙Re(L—12)。

芩连术苓散的制备和质量控制

目的：探讨芩连术苓散的制备工艺和质量标准。方法：芩连术苓散中主要中药成分的定性鉴定用显微鉴定法，主要有效成分的鉴定用薄层层析法和化学鉴定法。结果：芩连术苓散制备工艺合理，质量稳定、可控。结论：本方法简便易行，准确可靠，重现性好，可用于该制剂的质量控制。

止泻奇效散的制备和质量控制

目的:探讨止泻奇效散的制备工艺和质量标准。方法:该制剂中主要中药成分的定性鉴定用显微鉴定法,主要有效成分的鉴定用薄层层析法,葛根的含量测定用高效液相色谱法。结果:该制剂制备工艺合理,质量稳定、可控。结论:本方法简便易行,准确可靠,重现性好,可用于该制剂的质量控制。

Identification of Taxus cuspidata Sieb.et Zucc endophytic fungi─ new recorded-genus-species of China and the metabolite

A total of 94 isolates of endophytic fungi were isolated from the bark of 200-yr.-old Taxus cuspidata Sieb. et Zucc. in the primeval forest of the Changbai Mountain Natural Reserve, and 19 species of endophytic fungi were identified. Among the taxa 2 new species and 1 new varied species as well as the 6 known species of China had been described in a previous article published on Journal of Forestry Research, Vol. 14 (4): 290-294 (2003). This paper made a detail description on the morpho-logical characteristics of the 9 new recorded-genus-species and 1 new record species with illustrations, including Staphy-lotrichum coccosporum Meyer et Nicot, Botryodema lateritium Papendoorf & Upadhyay, Oedocephalum glomerulosum (Rul-liard) Sacc., Trichosporonoides oedocephalis Haskins & Spencer, Beniowskia sphaeroidea (Kal Chbrenner et Caeke) Mason, Thermomyces verrucosus Pugh, Blakeman & Morgan-jones, Gilmaniella humicola Brron , Arthrinium sphaerosperma (Per.:Fr.) Ellis, Ambrosiella brunnea (Verrall) Batra, and Cytosporina notha Diedz (1 new record species). And the habitats, hosts, distribu-tions and fruiting periods were recorded for the new recorded-genus-species. The determination result of thin layer chroma-tography (TLC) showed that the liquid fermentation metabolites of the strains could not react positively with taxoids developer - the vanillic aldehyde and dilute bismuth potassium iodide.