β-谷甾醇和γ-谷维素的键合物对油脂特性的影响  

Effect of Bonding Mixture of β-sitosterol and γ-oryzanol on the Properties of Oil

作　　者：肖紫芬 傅红[1] 王毅毅 张虹 胡鹏 叶秀云[1,3] 

机构地区：[1]福州大学生物科学与工程学院,福州350108 [2]丰益(上海)生物技术研发中心有限公司,上海200137 [3]福州大学酶工程研究所,福州350108

出　　处：《中国粮油学报》2015年第8期64-67,73,共5页Journal of the Chinese Cereals and Oils Association

基　　金：国家自然科学基金(31271882/C200201);福建省自然科学基金(2013J01131)

摘　　要：采用质构仪、x-射线衍射仪（XRD）、差示扫描量热仪（DSC）及原子力显微镜（AFM）分别研究了β-谷甾醇和γ-谷维素键合物对液态油脂的硬度、油脂晶型、融化性质和表面形貌的影响。结果表明，当油脂中饱和脂肪质量分数为30％-50％时，β-谷甾醇和γ-谷维素的键合物提供的硬度相当于2．2-2．8倍三硬脂酸甘油酯所提供的硬度；棕榈油含有8％的键合物时，出现了少量β晶型；25d储存期内，β’晶型向β晶型的日平均转变速率增加了0．1l％；DSC结果表明，添加键合物后，油相Tpeak升高7．37℃，Tend不变，△H降低了4．12J／g：原子力显微镜图片显示棕榈油的晶体形态变得更加均匀细小．网络结构得以增强。The effect of melting properties and surface bonding mixture ofβ - sitosterol and γ - oryzanol on the hardness, polymorphism, topography of lipid oil were determined by texture analyzer, X - ray diffraction, differ- ential scanning calorimetry （DSC） and atomic force microscopy （ AFM）, respectively. The data showed that the hard- ness provided by bonding mixture of β - sitosterol and γ - oryzanol was equal to 2.2 to 2.8 times than that of tristear- in when the saturate fat content was 30% to 50%. The addition of 8% bonding mixture in palm oil resulted in a few of 13 form crystal appearing, and the daily average transition rate from β＇ to β form increased 0.11% during 25 days storage. The oil phrase served in DSC results. uted, and the network Tpeak increased 7.37 ℃, AH decerased 4.12 J/g while no obvious changes of Tend were ob- AFM images revealed that the crystal behavior of palm oil became more fine and well - distrib- structure has been enhanced.

关 键 词：Β-谷甾醇 γ-谷维素 硬度 晶型 融化性质 

分 类 号：TS221[轻工技术与工程—粮食、油脂及植物蛋白工程]