کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
597649 | 1454077 | 2007 | 5 صفحه PDF | دانلود رایگان |
The study presented in this communication used in situ turbidity measurements to estimate the extent of solubilisation of micellar calcium phosphate (MCP) on high pressure (HP) treatment. For this purpose, a suspension of casein micelles cross-linked by transglutaminase was used. The protein network in cross-linked casein micelles is stable against disruption so any HP-induced reduction in turbidity has to derive from solubilisation of MCP. Comparison of model calculations with experimental data indicate that in a 25 g L−1 casein micelle suspension (comparable to skim milk) solubilisation of MCP increases in near-linear fashion with pressure; at 100, 200 or 300 MPa, ∼25, 50 or 75% of MCP was solubilised. Extrapolation indicated that in normal milk, all MCP would be solubilised at ∼400 MPa. The estimates correlate excellently with previous observations on HP-induced disruption of casein micelles.
Journal: Colloids and Surfaces A: Physicochemical and Engineering Aspects - Volume 295, Issues 1–3, 1 March 2007, Pages 264–268