Effect of Polyglycerol Esters of Fatty Acids on the Physicochemical Properties and Stability of β-Carotene Emulsions during Digestion in Simulated Gastric Fluid
Effect of Polyglycerol Esters of Fatty Acids on the Physicochemical Properties and Stability of β-Carotene Emulsions during Digestion in Simulated Gastric Fluid
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DOI：
10.1007/s11483-008-9077-4
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发表时间：
2008-03
期刊：
影响因子：
3
通讯作者：
Lijun Yin;I. Kobayashi;M. Nakajima
中科院分区：
文献类型：
--
作者：
Lijun Yin;I. Kobayashi;M. Nakajima
研究了6种不同的聚甘油脂肪酸酯和2种不同粒径的β-胡萝卜素乳剂在模拟胃液中消化过程中的理化性质和稳定性。以β-胡萝卜素(0.1%w/w)在大豆油中为油相，1%(w/w)β-胡萝卜素在Milli-Q水中为水相，采用高压均质法制备了PGE-胡萝卜素乳状液。用激光衍射法测定了β-胡萝卜素乳状液的粒径，并用乳滴大小和跨度值的增大以及β-胡萝卜素在乳状液中消化过程中的滞留来解释乳状液的稳定性。细乳液的平均粒径范围为0.17~0.27μm，粗乳液的平均粒径范围为1.16~1.59μm。在所制备的β-胡萝卜素乳剂中，随着甘油在PGES中聚合度的增加，乳状液的粒径减小，并且甘油聚合度的提高也增加了乳状液在SGF中消化的稳定性。尽管随着消化时间的延长，乳状液中β-胡萝卜素的含量显著下降，但不稳定乳状液中β-胡萝卜素的损失比稳定乳状液中的要严重，这表明加入到液滴中的颗粒可以为减少β-胡萝卜素的降解提供一定的保护屏障。因此，由甘油高聚合度的聚乙二醇酯稳定的β-胡萝卜素乳剂可能在食品和药物配方中有进一步的应用。在本研究中，十甘油单油酸酯(MO750)是稳定β-胡萝卜素乳状液的最有效乳化剂。
The effects of six different polyglycerol esters of fatty acids (PGEs) and two different particle sizes produced using various processing parameters on the physicochemical properties and stability of the β-carotene emulsions during digestion in simulated gastric fluid (SGF) were investigated. β-Carotene emulsions were prepared by high-pressure homogenization using β-carotene (0.1%w/w) in soybean oil as the oil phase and 1% (w/w) PGE in Milli-Q water as the water phase. The particle size of β-carotene emulsions was measured by a laser diffraction technique, and the stability of emulsions was interpreted in terms of the increase in particle size and span value of emulsion droplets and the retention of β-carotene during digestion in SGF. The average particle size ranges of emulsions were 0.17 to 0.27 μm for fine emulsions and 1.16 to 1.59 μm for coarse emulsions. In the prepared β-carotene emulsions, the particle size decreased with increasing polymerization of the glycerol in PGEs, and the higher polymerization of the glycerol also increased the stability of emulsions during digestion in SGF. Although the β-carotene content in the emulsions significantly decreased with increasing digestion period, loss of β-carotene was more severe in unstable emulsions than in stable emulsions, suggesting that the particles incorporated into droplets could provide some protective barrier for decreasing the β-carotene degradation. Therefore, β-carotene emulsions stabilized by PGEs with high polymerization of the glycerol may be useful for further applications in food and drug formulations. Decaglycerol monooleate (MO750) was demonstrated to be the most effective emulsifier in stabilizing β-carotene emulsions in this study.