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首页> 外文期刊>Journal of Agricultural and Food Chemistry >EVALUATION OF THE DENATURATION KINETICS OF TWO DIFFERENTLY PREPARED PROTEIN CONCENTRATES FROM BOVINE BLOOD PLASMA
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EVALUATION OF THE DENATURATION KINETICS OF TWO DIFFERENTLY PREPARED PROTEIN CONCENTRATES FROM BOVINE BLOOD PLASMA

机译：牛血液血浆中两种不同制备的蛋白质浓缩物的脱氧动力学评估

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摘要

Significant damage to the blood plasma protein matrix-measured by differential thermal analysis-starts at a temperature of 50 degrees C. The denaturation of the plasma protein can be described by dividing the proteins into three fractions (I-III) which differ in their reaction kinetics behaviors. Two ways of producing protein concentrates have been investigated. Plasma concentrate A prepared by ultrafiltration generally shows a more sensitive behavior regarding temperature than does plasma concentrate B prepared by evaporation. Temperature shifts of up to 5 K and a decrease of the velocity constant of up to 2 decimal powers have been measured. It can be assumed that aggregation reactions dominate the upfolding reaction with increasing ionic strength of the solvent. The sharp bend (i.e. discontinuity of kinetics parameters) in the Arrhenius display of the third fraction detected in plasma concentrate A does not occur in plasma concentrate B.
机译：通过差示热分析测量的对血浆蛋白基质的重大损害始于50摄氏度的温度。血浆蛋白的变性可以通过将蛋白分为反应不同的三个部分（I-III）来描述动力学行为。已经研究了两种生产蛋白质浓缩物的方法。与通过蒸发制备的血浆浓缩物B相比，通过超滤制备的血浆浓缩物A通常在温度方面表现出更敏感的行为。已测量到高达5 K的温度偏移和高达2个十进制幂的速度常数的减小。可以假设聚集反应在溶剂的离子强度增加的情况下主导了上折反应。在血浆浓缩物A中检测到的第三馏分的Arrhenius显示中的急剧弯曲（即动力学参数的不连续性）在血浆浓缩物B中不会发生。

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