کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
608106 | 880568 | 2012 | 7 صفحه PDF | دانلود رایگان |
The voluminosity of casein micelles was studied by means of static rheometry. In concentrated casein micelle suspensions with fluid-like flow properties to random-close packing, the reduced viscosity was obtained and linked via the Krieger–Dougherty model of volume fraction effect. The temperature dependency of hydration was fitted in a wide temperature (5°C⩽ϑ⩽35°C) and mass fraction range (0.01⩽w⩽0.160.01⩽w⩽0.16). The results of our study suggested that the voluminosity of casein micelles decreased with increasing temperature and asymptotically reached a plateau (ϑ>30°C) as a consequence of the protein swelling and decreasing water immobilization. The obtained apparent voluminosity of native casein micelles dispersed in UF permeate was 5.0 ml g−1 at 5°C, 4.1 ml g−1 at 20°C, and 3.7 ml g−1 at 35°C.
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► We modelled the apparent voluminosity based on rheological measurements.
► Casein micelle suspensions will fit Krieger–Dougherty and voluminosity models.
► The voluminosity–temperature relationship follows a continuous function.
► The voluminosity of casein micelles decreases with increasing temperature (5–35 °C).
Journal: Journal of Colloid and Interface Science - Volume 386, Issue 1, 15 November 2012, Pages 174–180