%A Huang Qi-hua, Gao Wen-shu, Shi Wan-yang and Fan Ming-juan %T Molecular Weight and Chemical-Modifications of the Gum from the Seeds of Sesbania cannabina (RETZ.) PERS %0 Journal Article %D 1980 %J J Integr Plant Biol %R %P -${article.jieShuYe} %V 22 %N 4 %U {https://www.jipb.net/CN/abstract/article_24504.shtml} %8 %X The water-soluble polysaccharide is isolated and purified from the seeds of Sesbania cannabina (Retz.) Pers. Its physiochemical properties are investigated. The purified preparation seems to be homogeneous after ultra-centrifugation. The sedimentation coefficient of the gum obtained from alcoholic purification is 4.71 S, its intrinsic viscosity is 5.93 dl/g and its molecular weight is estimated to be 391,000. When it is obtained from copper alcoholic purification, however, its sedimentation coefficient is 2.82 S, its intrinsic viscosity 2.44 dl/g and its molecular weight 206,000. Several derivatives of the gum have been prepared, including carboxymethylated gum, hydroxyethylated gum and carboxymethylhydroxyethylated gum.