改性高链玉米淀粉的生物降解性能  

Biodegradability of Modified Comstarches with High-content Amylose

作　　者：邱礼平[1] 温其标[1] 

机构地区：[1]华南理工大学食品与生物工程学院,广东广州510640

出　　处：《华南理工大学学报（自然科学版）》2004年第6期55-58,共4页Journal of South China University of Technology(Natural Science Edition)

基　　金：广东省自然科学基金资助项目(31424)

摘　　要：利用微生物群在半生物体内模型中分解底物的模拟人体消化的方法,研究了不同链淀粉含量的玉米淀粉及其改性淀粉的生物降解性能.结果表明,玉米淀粉及其改性淀粉的生物降解性能与其链淀粉含量有关,链淀粉含量为50％的高链玉米淀粉最难降解,普通玉米淀粉(链淀粉含量为26％)最易被降解,链淀粉含量为70％的高链玉米淀粉的降解性能居中;普通玉米淀粉和链淀粉含量高的玉米淀粉经交联变性可抑制其生物降解性能,而羧甲基化变性将会加速其降解.By using the simulated physical digestion method of decomposing the substrates by micropopulation in half-vivo model, the biodegradabilities of cornstarches with different amylose contents and those of their modified starches were studied. The results indicate that the biodegradabilities of cornstarches and their modified starches are related to the amylose content, that the high-content amylose starch containing 50% amylose is most difficult to biodegrade, while the ordinary cornstarch (with the amylose content of 26% ) is most easy to biodegrade, and the biodegradability of the cornstarch containing 70% amylose is medium. The experimental results also indicate that the biodegradabilities of ordinary cornstarches and the cornstarches with high-content amylose decrease by cross-linking but increase by carboxyl-methvlation.

关 键 词：高链玉米淀粉 改性淀粉 生物降解 

分 类 号：TS232[轻工技术与工程—粮食、油脂及植物蛋白工程]