玉米皮渣中膳食纤维提取及其理化性质研究毕业论文
时间:2025-04-20
时间:2025-04-20
南 阳 理 工 学 院
本科生毕业论文
玉米皮渣中膳食纤维提取及其理化性质研究 Study on Extraction and Physicochemical Characterization of Corn
Bran Dietary Fiber
总 计: 毕业设计(论文) 16页
表 格: 2 个
插 图: 7 幅
南 阳 理 工 学 院 本 科 毕 业 论 文
玉米皮渣中膳食纤维提取及其理化性质研究
Study on Extraction and Physicochemical Characterization of
Corn Bran Dietary Fiber
学 院: 生物与化学工程学院
专 业: 食品科学与工程
玉米皮渣中膳食纤维提取及其理化性质研究
[摘 要]本文以玉米皮渣为原料,采用蛋白酶和α-淀粉酶结合水解制备玉米皮膳
食纤维。通过单因素实验确定蛋白酶和α-淀粉酶的最佳用量、水解时间及最适温度,然后在单因素的基础上再对这两种酶做正交试验确定最佳工艺。结果表明蛋白酶用量为1.0%,温度为50℃时水解40min,α-淀粉酶用量为0.4%,温度为60℃时水解50min,此时水解的效果最好,膳食纤维的含量最高。本实验同时研究了玉米渣膳食纤维的理化性质,其持水力为197%,膨胀性为143%,持油性为187%。
[关键词]玉米皮;膳食纤维;蛋白酶;α-淀粉酶
Study on Extraction and Physicochemical Characterization of
Corn Bran Dietary Fiber
Food Science and Engineering SONG Jian-hua
Abstract: Using corn bran as main material in this paper, proteinase and α-amylase were employed to produce the corn bran dietary fiber. Single factor experiments were adapted to determine the optimum dosage, hydrolysis time, and optimum temperature of protease and α-amylase. Then on the basis of above experiments, the optimum process was obtainded by orthogonal test of these two enzymes. The results showed that the hydrolysis effect was best and the content of dietary fiber was highest when the protease was in the amount of 1.0%, the hydrolysis temperature and time of 50℃, 40min, and the α-amylase’s concentration was 0.4%, the hydrolysis temperature and time of 60℃, 50min. These experiments were studied on the physicochemical properties of corn bran dietary fiber in the meantime. Its water-holding power was 197%. Its expansibility was 143%. Its oil-holding capacity was 187%.
Key words: corn bran; dietary fiber; protease; α-amylase
目 录
1引言…………………………………………………………………………………………1
1.1膳食纤维的定义和分类………………………………………………………………1
1.2膳食纤维的主要特性和功效…………………………………………………………2
1.3膳食纤维的制备方法…………………………………………………………………3
1.4玉米皮渣中膳食纤维的国内外研究现状……………………………………………4
1.5本文研究的意义和前景………………………………………………………………4 2材料与方法…………………………………………………………………………………5
2.1材料和仪器……………………………………………………………………………5
2.1.1材料和试剂………………………………………………………………………5
2.1.2 主要仪器…………………………………………………………………………5
2.2方法……………………………………………………………………………………5
2.2.1玉米皮渣中膳食纤维的提取……………………………………………………5
2.2.2单因素实验………………………………………………………………………5
2.2.3正交实验…………………………………………………………………………6
2.2.4玉米皮渣中膳食纤维的理化性质测定…………………………………………7 3结果与讨论…………………………………………………………………………………8
3.1单因素实验结果………………………………………………………………………8
3.1.1蛋白酶用量对膳食纤维得率的影响……………………………………………8
3.1.2蛋白酶酶解时间对膳食纤维得率的影响………………………………………8
3.1.3蛋白酶在不同温度下对膳食纤维得率的影响…………………………………9
3.1.4 α-淀粉酶用量对膳食纤维得率的影响…………………………………………9
3.1.5 α-淀粉酶酶解时间对膳食纤维得率的影响……………………………………10
3.1.6 α-淀粉酶在不同温度下对膳食纤维得率的影响………………………………10
3.2正交实验结果…………………………………………………………………………11
3.3玉米皮渣中膳食纤维的理化性质……………………………………………………12 4结论………………………………………………………………………………………14 参考文献……………………………………………………………………………………15 致谢…………………………………………………………………………………………16
1 引言
1.1 膳食纤维的定义和分类
膳食纤维主要是指存在于食物中不能够被人体消化吸收的多糖类化合物的总称,即不能被人类的胃肠道中消化酶所消化的,且不被人体吸收利用的多糖。这类多糖主要来自 …… 此处隐藏:9943字,全部文档内容请下载后查看。喜欢就下载吧 ……