Study of rheological characterization off enugreek gum with modified maxwellmodel

1 INTRODUCTIONFenugreek,i.e.trigonella foenum-graecum,is an an-nual herbaceous plant of leguminosae,which arewidely planted in China.Fenugreek seed consists oftesta,endosperm and plumula cotyledon.Fenugreekgum is taken from endosperm,which contains morethan 60% galactomannans with the ratio of galac-tose to mannose 1:1.2.It is soluble in water,aque-ous acid and alkali,respectively,and insoluble in or-ganic solvents.It is a natural polysaccharide whichis composed of a linear backbone of 1-4 β linkedD-mannose units with 1-6 αlinked D-galactoseunits attached as side chains.Its molecular formulais (C_6H_(10)O_5)_n.H_2O.Its structure can be showed asFig.1.Its molecular weight is about 2.5 x 10~5to l.3 x 10~5 that is determined by measuring theviscosity.In practice,due to possessing the advan-tages of low friction resistance,low damage to the     

微球型壳聚糖胺基吸附剂的制备及性能

以壳聚糖为原料,采用反相悬浮交联的方法制取微球型壳聚糖颗粒,再进行羟丙基氯化及胺基化,制备了一系列新型壳聚糖胺基衍生物微球。衍生物的胺基含量明显提高,碱性增强。并初步考察其吸附牛血清白蛋白（ＢＳＡ）性能。可用作新固定化酶载体及生化分离材料。     

新型酸性粘多糖--磺化羧甲基香豆胶的研制

以香豆胶为原料,分别引入羧甲基和磺酸基因,首次获得水溶性良好的新型香豆胶磺化衍生物。红外光谱分析表明,该衍生物为新型酸性粘多糖,具有类肝素特性,硫质量分数为14.4%。