The authors dealt with the effects of dynamic high pressure micro-fluidization(untreated and 20-160 MPa treated) on the structure and physico-chemical properties of egg white solutions[6%(mass fraction) or 61.2 mg...The authors dealt with the effects of dynamic high pressure micro-fluidization(untreated and 20-160 MPa treated) on the structure and physico-chemical properties of egg white solutions[6%(mass fraction) or 61.2 mg protein/mL]. Micro-fluidization treatment resulted in a decrease in mean particle size, and little change in solubility. It was found that the residual denaturation enthalpy was decreased with the increase of pressure from 20 to 100 MPa and from 120 to 160 MPa, reaching into the maximum at 160 MPa. There was an increase of surface hydrophobicity with the maximum at 100 MPa observed. Simultaneously, micro-fluidization treatment also resulted in a decrease in the content of sulfhydryl groups.展开更多
采取动态高压微射流(dynamic high pressure microfluidization,DHPM)不同压力(0~120 MPa)和次数(0~7次)对鲢鱼鱼骨进行处理,以鱼骨粒度分布、微观结构、表面疏水性、游离氨基含量、钙离子溶出量为评价指标,研究了DHPM处理对鲢鱼鱼骨...采取动态高压微射流(dynamic high pressure microfluidization,DHPM)不同压力(0~120 MPa)和次数(0~7次)对鲢鱼鱼骨进行处理,以鱼骨粒度分布、微观结构、表面疏水性、游离氨基含量、钙离子溶出量为评价指标,研究了DHPM处理对鲢鱼鱼骨超微细化效果的影响。结果表明,随着DHPM处理压力的增大和次数的增多,鱼骨的粒径明显降低;其表面形貌发生改变,片状结构被破坏形成小颗粒,而后出现凝聚现象; DHPM处理能有效地改变鱼骨表面疏水性和钙离子含量;经DHPM不同压力和次数处理后,鱼骨游离氨基含量均有所降低。这可为DHPM对鱼骨改性利用提供一定的理论参考。展开更多
基金Supported by the National Natural Science Foundation of China(No.20666004)Program for Changjiang Scholars and Innovative Research Team in University of China(No.IRT0540)
文摘The authors dealt with the effects of dynamic high pressure micro-fluidization(untreated and 20-160 MPa treated) on the structure and physico-chemical properties of egg white solutions[6%(mass fraction) or 61.2 mg protein/mL]. Micro-fluidization treatment resulted in a decrease in mean particle size, and little change in solubility. It was found that the residual denaturation enthalpy was decreased with the increase of pressure from 20 to 100 MPa and from 120 to 160 MPa, reaching into the maximum at 160 MPa. There was an increase of surface hydrophobicity with the maximum at 100 MPa observed. Simultaneously, micro-fluidization treatment also resulted in a decrease in the content of sulfhydryl groups.