期刊
INTERNATIONAL DAIRY JOURNAL
卷 64, 期 -, 页码 1-8出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.idairyj.2016.08.010
关键词
-
The effect of orthophosphate (0-0.1 M) on the aggregation of sodium caseinate in water (10-80 g L-1) induced by calcium ions was studied using confocal microscopy, sedimentation and P-31 magic angle spinning nuclear magnetic resonance spectroscopy. In the presence of calcium ions (0-0.1 M), orthophosphate binds to the caseins leading to the formation of complexes involving all four types of casein. Above a critical molar calcium/protein ratio in the complex, large protein aggregates were formed that sedimented during centrifugation. The critical molar ratio increased from about 6 without added orthophosphate to about 10 in excess orthophosphate. Excess orthophosphate precipitated in the form of calcium phosphate particles and competed with caseins for binding of calcium ions. Binding of calcium ions led to immobilisation of inorganic orthophosphate and organic phophoserines in solid nanoparticles. In excess CaCl2 and orthophosphate, the complexes contained about 13 calcium and 10 orthophosphate ions. (C) 2016 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据