脂肪酸碳链长度对甘三酯体外模拟消化的影响  

Effect of carbon chain length of fatty acids on simulated digestion in vitro of triglyceride

作　　者：徐俊杰[1] 黄健花[1] 宋志华[1] 王兴国[1] 

机构地区：[1]江南大学食品学院,食品科学与技术国家重点实验室,食品安全与营养协同创新中心,江苏无锡214122

出　　处：《中国油脂》2014年第6期49-52,共4页China Oils and Fats

基　　金："十二五"国家科技支撑项目(2011BAD02B03)

摘　　要：用pH-stat法模拟不同脂肪酸链长甘三酯的人体体外消化过程,从乳化粒径的角度研究脂肪酸碳链长度对甘三酯体外消化速率的影响。结果表明:三辛酸甘油酯(C8)乳化后,平均粒径最小,其他与之碳数相差越多则粒径越大;整体消化过程中三辛酸甘油酯(C8)的消化速率最高,其他与之碳数相差越多则消化速率越小。乳糜微粒的粒径大小与甘三酯的消化速率呈负相关的关系。消化速率的大小顺序为三辛酸甘油酯(C8)>三月桂酸甘油酯(C12)>三乙酸甘油酯(C2)>三硬脂酸甘油酯(C18)。The digestions in vitro of triglycerides with different carbon chain length of fatty acids in human body were simulated by pH-stat method. From the perspective of the particle size of emulsion, the effect of different carbon chain length of fatty acids on the rate of digestion in vitro of triglyceride was studied. The results showed that after emulsification, the average particle size of tricaprylin （C8） was minimum;with the increase of carbon number differences between the other triglycerides and C8 , the particle size increased . Tricaprylin （ C8 ） had the highest rate of digestion in the process of the overall digestion;with the increase of carbon number differences between the other triglycerides and C8 , the rate of digestion reduced. A negative correlation between particle size of chylomicron and digestion rate of triglyceride was found. The rate of digestion of tricaprylin （ C8 ） was the highest, followed by laurin （ C12 ） , triacetin （C2） and tristearin（C18）.

关 键 词：甘三酯 pH—stat 体外消化 胰脂酶 粒径 

分 类 号：R151[医药卫生—营养与食品卫生学]