刘钟栋,高莉,王艳丽,张露.小麦淀粉液化工艺优化与液化淀粉纳米结构研究[J].农业机械学报,2008,39(1):87-90.
.[J].Transactions of the Chinese Society for Agricultural Machinery,2008,39(1):87-90.
摘要点击次数: 3069
全文下载次数: 5
小麦淀粉液化工艺优化与液化淀粉纳米结构研究   [下载全文]
   [Download Pdf][in English]
  
DOI:10.3969/j.issn.1000-1298.[year].[issue].[sequence]
中文关键词:  小麦淀粉  液化  拓扑结构  原子力显微镜
基金项目:
刘钟栋  高莉  王艳丽  张露
河南工业大学
中文摘要:以小麦淀粉为原料,用耐高温α-淀粉酶液化可制备异麦芽低聚糖。采用正交试验法,对小麦淀粉液化过程的影响因素进行了研究。研究结果表明,最佳工艺条件为pH值5.6~5.8,淀粉乳质量分数25%,温度85℃,SPEZYME Fred用量14LU/g,液化时间80min,所得液化液的DE值为15.62。用原子力显微镜研究了淀粉液化前以及液化后DE值分别为7~9和11~13时液化淀粉的拓扑结构, 得到了淀粉在液化过程中颗粒结构变化的直接图像证据。它表明随着液化程度的提高,淀粉的颗粒逐渐被破坏,由粒状变为枝状。这些图像也是淀粉中存在粒状结构、直链结构和支链结构的直接证据。
Key Words:
Abstract:Using wheat starch as raw material, and thermostable α-amylase SPEZYME Fred as liquefacient, isomalto-oligosaccharide was prepared. The factors which affected liquefying of wheat starch were investigated by orthogonal tests. The results showed that the optimum condition was as follows: pH value was 5.6~5.8, the mass percent of starch pulp was 25%, liquefying temperature was 85℃, the usage quantity of SPEZYME Fred was 14LU/g, liquefying time was 80 minutes. On this condition, DE value of liquefied solution was 15.62%. The topology nanostructure of starch pulp was researched by atomic force microscopy when the wheat starch was not liquefied and DE value of liquefied starch pulp was 7~9 and 11~13. Image evidence of starch granules' structure change was obtained. With the increase of liquefied degree, Starch granules were broken up gradually and became branch structure. These images proved that starch granules were composed of particle structures, amylose structures and amylopectin structures.

Transactions of the Chinese Society for Agriculture Machinery (CSAM), in charged of China Association for Science and Technology (CAST), sponsored by CSAM and Chinese Academy of Agricultural Mechanization Science(CAAMS), started publication in 1957. It is the earliest interdisciplinary journal in Chinese which combines agricultural and engineering. It always closely grasps the development direction of agriculture engineering disciplines and the published papers represent the highest academic level of agriculture engineering in China. Currently, nearly 8,000 papers have been already published. There are around 3,000 papers contributed to the journal each year, but only around 600 of them will be accepted. Transactions of CSAM focuses on a wide range of agricultural machinery, irrigation, electronics, robotics, agro-products engineering, biological energy, agricultural structures and environment and more. Subjects in Transactions of the CSAM have been embodied by many internationally well-known index systems, such as: EI Compendex, CA, CSA, etc.

   下载PDF阅读器