Rheum tanguticum
1.AIM: To assign the 1HNMR finger prints of the roots of Polygonum cuspidatum, Polygonum multiflorum, Rheum palmatum and Rheum tanguticum , and to compare the differences of the 1HNMR finger prints between Polygonum and Rheum species.
2.[Objective] The research aimed to master the distribution characteristics of anthraquinone compounds in the stem of Rheum tanguticum Maxim. et Balf.
3.The content of aloe-emodin, rhein, emodin, chrysophanoland physcion in 3 and 4 year old cultivated Rheum tanguticum, which grew in Qinghai in different months of it growth season, were determined by high performance liquid chromatography.
4.It was shown that in 3 and 4 year old cultivated Rheum tanguticum, the anthraquinone content increases between May and June, and the early growth period, remarkably declined from June to September, the vigorous growth period, and slightly rebounded, and varied within 0.8%~2.5% and 1.3%~2.1%, respectively.
