Journal
INTERNATIONAL DAIRY JOURNAL
Volume 20, Issue 5, Pages 314-320Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.idairyj.2009.11.018
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- Department of Agriculture, Fisheries and Food [06RDTMFRC431]
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The effect of high-pressure homogenization using a Microfluidizer (R) on texture, water-holding capacity, and extent of syneresis on stirred yoghurts was compared with that of conventional homogenization. The effect of homogenization condition on particle size was also assessed in milk and in yoghurt. Stirred yoghurts were prepared from recombined milk samples (0 and 1.5% fat) heat-treated (95 degrees C, 2 min) and then treated by conventional valve homogenization at 25 MPa or microfluidization at 150 MPa. Homogenization conditions influenced the particle size in milk, gel particle size, and textural quality of stirred yoghurts in a manner dependent upon fat content. Milk microfluidized at 150 MPa had smaller particle size than homogenized milk, but resulted in larger particles in yoghurt. Microfluidization of low-fat milk modified the microstructure of yoghurt, giving more interconnectivity in the protein networks with embedded fat globules, but with similar texture profiles and water retention compared with yoghurt made from conventionally homogenized milk. (C) 2009 Published by Elsevier Ltd.
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