摘要
磨皮粉为莲子加工过程中的副产物,本实验以莲子磨皮粉提取蛋白质后的残渣为原料,通过单因素和正交实验优化了其淀粉提取工艺,并分析了该淀粉的颗粒形貌、晶型和糊化特性等性质。结果表明,提取莲子磨皮粉淀粉的最优条件为：0.125 mol/L Na OH提取液、液固比8∶1（m L/g）,在温度50℃下提取5.5 h,在此条件下粗淀粉的提取率为94.80%;所得粗淀粉中淀粉含量达88.64%,直链淀粉含量达34.97%;淀粉为C型结晶结构,颗粒多呈椭圆形,粒径范围在3~26μm;起始糊化温度为78.4℃,崩解值为2172.00 m Pa.s,较易糊化且淀粉糊热稳定性较好;回升值为2025.00 m Pa.s,易老化。
Peel waste is a by-product from grinding endodemis of dry lotus seed. In the present study,the extraction conditions of starch from the protein-extracted residue of lotus seed peel waste were investigated. The microphotograph characters,gelatinization properties and crystallographic structure of this starch were analyzed. On the basis of single factor and orthogonal experiments,the optimal extraction conditions were obtained as follows： using 0. 125 mol / L Na OH solution with a ratio of liquid to solid 8∶ 1（ m L / g）,extraction at 50 ℃ for 5. 5 h. Under these conditions,the extraction rate of crude starch was 94. 80%,in which starch and amylose content of the prepared crude starch sample were 88. 64%and 34. 97%,respectively. In addition,the starch granules were of mostly elliptic shape,possessed a size range of 3-26μm and＂C＂XRD pattern. The initial gelatinization temperature,breakdown value and recovery value of RVA profile were 78. 4 ℃,2172. 00 m Pa. s and 2025. 00 m Pa. s,respectively. These results indicated that the extracted starch had properties of easy gelatinization,good thermal stability and easy aging.
出处
《天然产物研究与开发》
CAS
CSCD
北大核心
2016年第4期613-618,共6页
Natural Product Research and Development
基金
国家"十二五"科技支撑计划(2012BAD31B08)
湖南省教育厅产业化培育项目(2015CY001)
湖南省科技计划(2014NK3056)
关键词
莲子
副产物
淀粉
提取
性质
lotus seed
by-products
starch
extraction
characteristic
