采用双氧水降解的方法获得了低分子量的琼脂糖,并用粘度法测定了降解琼脂糖的分子量,利用红外光谱测试了降解琼脂糖结构,采用散射光浊度仪对琼脂糖溶液的成凝胶过程进行了探讨,并通过动物试验测试了其降解特性.通过控制降解反应时间可以得到不同分子量的降解琼脂糖,降解15h后琼脂糖的粘均分子量稳定在1.47万.浊度分析结果表明,随着分子量的减小,琼脂糖溶液的成凝胶速度及凝胶的强度均明显下降.红外光谱分析表明,在降解过程中少量的醛基可通过硼氢化钠还原.体内降解试验表明,琼脂糖通过降低分子量可提高降解速度.小分子量的琼脂糖降低了其凝胶温度,并延长了凝胶时间,提高了体内降解速度,可望用于皮肤再生敷料等生物医学领域.
参考文献
[1] | Ramesh HP.;Tharanathan RN. .Carbohydrates - The renewable raw materials of high biotechnological value [Review][J].Critical Reviews in Biotechnology,2003(2):149-173. |
[2] | Feng Tian;Yu Liu;Keao Hu;Binyuan Zhao .Study of the depolymerization behavior of chitosan by hydrogen peroxide[J].Carbohydrate Polymers: Scientific and Technological Aspects of Industrially Important Polysaccharides,2004(1):31-37. |
[3] | 甄宇红,杨青,张宝璟.环氧氯丙烷法活化琼脂糖凝胶及其动力学分析[J].大连医科大学学报,2005(04):268-272. |
[4] | Rochas C;Lahaye M .Average molecular weight and molecular weight distribution of agarose and agarose-type polysaccharides[J].Carbohydrate Polymers,1989,10(04):289. |
[5] | Knaul JZ.;Bui VT.;Creber KAM.;Kasaai MR. .Characterization of deacetylated chitosan and chitosan molecular weight review[J].Canadian Journal of Chemistry,1998(11):1699-1706. |
[6] | Xiong J Y;Narayanan J;Liu X Y et al.Topology evolution and gelation mechanism of agamse gel[J].Journal of Physical Chemistry B,2005,109(12):5638. |
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