The functionality of micellar casein produced from retentate caprine milk treated by HP
The functionality of micellar casein produced from retentate caprine milk treated by HP
复制标题
经HP处理的羊奶渗余物生产的胶束酪蛋白的功能
DOI：
10.1016/j.jfoodeng.2020.110144
复制
发表时间：
2021-01-01
影响因子：
5.5
通讯作者：
Lv, Jiaping
中科院分区：
文献类型：
--
作者：
Nassar, Khaled S.;Jing Lu;Lv, Jiaping
研究了高压（HP）处理对喷雾干燥前微滤渗余物（MFR）山羊乳的理化、结构和流变学特性的影响。此外，还对胶束酪蛋白浓缩物（MCC）的功能特性和微观结构进行了测定。在（25 ± 2）℃下用不同水平的压力（100-500 MPa）处理微滤/渗滤的乳蛋白质渗余物15分钟，然后喷雾干燥。结果表明，随着压力水平的升高，浊度和酪蛋白粒径显著降低，pH值、可溶性钙和磷显著升高。此外，研究了所有样品的MFR的结构特征。与未处理的样品相比，HP处理的样品的疏水性增加。相反，HP处理的MFR凝胶的G 'max和屈服应力值降低。在100 MPa高压下处理的MFR样品具有最高的G 'max平均值（99.75 Pa）和最低的凝乳酶凝固时间值（25.9 min）。此外，与对照相比，经HP处理的MCC样品的溶解度、乳化性和起泡性显著增加。在MCC-400 MPa下观察到最大溶解度百分比（80.3）、泡沫容量（47）和泡沫稳定性（79.8）。然而，MCC-400 MPa样品在1和24 h时显示出最低的平均浊度扫描稳定性指数（分别为4.9和7.3）。因此，高压预处理可以作为一种很好的替代技术，以促进MCC产品在食品工业中的应用。
The effect of high pressure (HP) treatment on the physicochemical, structural, and rheological characteristics of microfiltration retentate (MFR) caprine milk prior to spray drying was investigated. In addition, the functional and microstructure properties of micellar casein concentrate (MCC) were determined. Microfiltered/diafiltered milk protein retentates was treated at (25 + 2) degrees C for 15 min with a different levels of pressure (100-500 MPa), and then spray dried. The results showed that the turbidity and casein size decreased significantly while pH, soluble calcium and phosphorus significantly increased with an increase in pressure level. Further, the structural characteristics of MFR for all samples were studied. There was an increase in hydrophobicity of HP-treated samples compared with the untreated. In contrast, the G'max and yield stress values of the HP-treated MFR gels decreased. The MFR sample treated with HP at 100 MPa had the highest average of the G'max (99.75 Pa), and the lowest value of rennet coagulation time (25.9 min). Moreover, the solubility, emulsifying and foamability of MCC samples increased significantly with HP-treated samples compared to control. Maximum percentages of solubility (80.3), foam capacity (47) and foam stability (79.8) were observed at MCC-400 MPa. However, MCC-400 MPa sample showed the lowest average turbiscan stability index at 1 and 24 h (4.9 and 7.3, respectively). Thus, HP pre-treatment could be used as a good alternative technology to promote MCC products' application in the food industry.