The taxodeaceous plant A. Selaginoides contains six known homoerythrina-type alkaloids and selaginoidine, which has a furan ring replacing the benzene ring of the latter type. Selaginoidine and five of the six above-mentioned alkaloids also occur in A. laxifolia. 相似文献
Water-soluble polysaccharides have been isolated from two species ofEremurus — E. lactiflorus andE. luteus — with yields of 13.5% and 20.5%, respectively. They contained mainly glucose and mannose in ratios of 1:5 and 1:3.1. The polysaccharides ofE. lactiflorus were separated from a column of DEAE-cellulose. The yield of neutral fraction was 10.3%. Gel filtration of the polysaccharides on Sephadex G-200 showed their polydispersity. Homogeneous fractions were obtained by fractional precipitation with ethanol. They have been characterized with respect to monosaccharide composition, molecular weight, and IR spectra.Institute of the Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 5, pp. 604–608, September–October, 1979. 相似文献
Summary 1.Rh. quadrifida (Pall.) Fisch. et Mey has yielded a new glycoside which has been called rhodioloside and for which the structure of the -D-glucopyranoside of -(p-hydroxyphenyl)ethanol has been established.2. Rhodioloside is also present inRh. rosea L.3. -(p-Hydroxyphenyl)ethanol, which is the aglycone of the glucoside isolated, has been obtained from both plants.Khimiya Prirodnykh Soedinenii, Vol. 3, No. 4, pp. 244–249, 1967 相似文献
Front Cover: Highly aligned 3D silk scaffolds using directional freezing in a custom designed chamber was demonstrated. The method is versatile and holds potential to produce complex, multicomponent aligned structures for various tissue engineering and biomedical applications, needing immediate cell alignment to mimic native tissue hierarchy and function. Further details can be found in the article by B. B. Mandal, E. S. Gil, B. Panilaitis, and D. L. Kaplan* on page 48 .
