Department of Food Science and Technology, Zhejiang University of Technology, Zhejiang, Hangzhou 310014, PR China.
Department of Food Science and Technology, Zhejiang University of Technology, Zhejiang, Hangzhou 310014, PR China.
Int J Biol Macromol. 2019 Jul 15;133:466-472. doi: 10.1016/j.ijbiomac.2019.04.126. Epub 2019 Apr 17.
This work studied the effects of different concentrations of gum arabic (GA) on the interfacial adsorption kinetics of whey protein (WP) at the oil-water interface, the possibility of emulsion stabilized by WP/GA mixtures, and use of such emulsions as resveratrol delivery systems. Dynamic interface pressure measurements indicated that the change of GA concentration significantly affected the diffusion, penetration and rearrangement of WP at the oil-water interface, while measurements of hydrodynamic diameter and ζ-potential indicated electrostatic and hydrophobic interactions between WP and GA. The rheological measurements of the emulsions supported the above observations and indicated that different GA concentrations affected the viscoelastic properties of the emulsion. Adding resveratrol into oil influenced the adsorption of WP at the oil-water interface, thus affecting the emulsion stability and the encapsulation efficiency of resveratrol. The emulsions stabilized by WP and WP/GA mixtures have encapsulation efficiencies of >50% for resveratrol, while emulsions showed the best stability at a GA concentration of 0.2%. These results indicate that GA could effectively improve the emulsifying capacity of WP, while the emulsions prepared by WP/GA mixtures have the potential to serve as carriers for bioactive components.
本工作研究了不同浓度的阿拉伯胶（GA）对乳清蛋白（WP）在油水界面上的界面吸附动力学、由 WP/GA 混合物稳定的乳液的可能性，以及将此类乳液用作白藜芦醇递送系统的可能性。动态界面压力测量表明，GA 浓度的变化显著影响 WP 在油水界面上的扩散、渗透和重排，而水动力直径和 ζ-电位的测量表明 WP 和 GA 之间存在静电和疏水相互作用。乳液的流变学测量支持了上述观察结果，并表明不同的 GA 浓度影响乳液的粘弹性性质。向油中添加白藜芦醇会影响 WP 在油水界面上的吸附，从而影响乳液的稳定性和白藜芦醇的包封效率。由 WP 和 WP/GA 混合物稳定的乳液对白藜芦醇的包封效率超过 50%，而在 GA 浓度为 0.2%时，乳液表现出最佳的稳定性。这些结果表明，GA 可以有效地提高 WP 的乳化能力，而由 WP/GA 混合物制备的乳液有可能作为生物活性成分的载体。
