马铃薯淀粉源小分子糖的理化性质研究  

Physicochemical Properties of a Potato Starch-derived Oligosaccharide

作　　者：郝利民[1] 鲁吉珂[2] 范明[3] 李兆丰[4] 崔燕[1] 张黎明[5] 顾正彪[4] 张友松 

机构地区：[1]总后军需装备研究所,北京100010 [2]郑州大学生命科学学院,河南郑州450001 [3]军事医学科学院基础医学研究所,北京100850 [4]江南大学食品学院,江苏无锡214122 [5]天津科技大学生物工程学院,天津300457 [6]天津工业大学材料科学与工程学院,天津300387

出　　处：《现代食品科技》2015年第6期106-110 253,253,共6页Modern Food Science and Technology

基　　金：全军科研项目(AX110C002和AWS12J004)

摘　　要：采用扫描电镜、凝胶过滤色谱、红外光谱和差示扫描量热仪等仪器手段,对一种可用于运动饮料的新型马铃薯淀粉源小分子糖Jxsac 4进行表征,包括基本理化性质、颗粒形貌、分子量分布、糊化性质、热力学特性和体外抗消化性质等。结果表明Jxsac4属淀粉高度水解产物,其平均分子量为786 D。Jxsac 4中水分含量为6.70%,含有一定的灰分(0.84%),蛋白质和脂肪含量均很低(不超过0.10%),直链淀粉含量非常低(0.11%),蓝值为0,还原糖含量为29.05 g/100 g。该糖溶解度为97.00%,为冷水可溶性糖。其透光率为97.00%,沉降体积为4.00 m L/100 m L,这表明Jxsac 4具有较强的亲水性。红外光谱结果显示有淀粉源糖类的特征吸收峰。该小分子糖中快消化淀粉含量较高,为94.02%,而慢消化淀粉含量仅为5.80%。Jxsac 4有望作为一种可阶梯供能的运动饮料原料。Scanning electron microscopy(SEM), gel filtration chromatography(GFC), infrared spectroscopy(IR), and differential scanning calorimetry(DCS) were used to characterize the properties of Jxsac 4, a novel oligosaccharide derived from potato starch, including its physicochemical properties, particle morphology, molecular weight distribution, pasting properties, thermal properties, and in vitro digestion-resistance capacity, for use in sports drinks. The results showed that Jxsac 4 was a highly hydrolyzed starch product with an average molecular weight of 786 D. In Jxsac 4, the water content was 6.70%, there was a certain amount of ash(0.84%), while protein and fat contents were relative low(less than 0.10%), amylose content was very low(0.11%), the blue value was zero, and reducing sugar content was 29.05 g/100 g. The solubility of Jxsac 4 was 97.00%, and it was soluble in cold water. Light transmittance and sedimentation volume of this sugar were 97.00% and 4 m L/100 m L, respectively, demonstrating that Jxsac 4 was highly hydrophilic. The FT-IR spectrum of Jxsac 4 showed the characteristic absorption peak for the functional groups derived from starch. The oligosaccharide had a high rapidly digestible starch content(94.02%), while the slowly digestible starch content was 5.80%. Jxsac 4 is a potential ingredient of sports drinks that can provide stepwise energy supply.

关 键 词：寡糖 饮料 分子量 粘度 表征 

分 类 号：TS235.2[轻工技术与工程—粮食、油脂及植物蛋白工程]