News Column

Findings on Phosphoproteins Described by D.L.Z. Liu and Colleagues

January 30, 2014

By a News Reporter-Staff News Editor at Agriculture Week -- Current study results on Proteins have been published. According to news reporting from Werribee, Australia, by VerticalNews journalists, research stated, "The composition of casein micelles and retentate serum were investigated during four-fold concentration of skim milk by ultrafiltration (UF) at 10 and 40 degrees C. Analysis of supernatants and pellets obtained by ultracentrifugation showed that while the concentration of soluble casein increased considerably during UF there was a net shift of casein from the serum to micelles at both temperatures. The hydration of casein micelles was higher at 10 degrees C than at 40 degrees C and increased slightly during UF."

The news correspondents obtained a quote from the research, "Dynamic light scattering measurements on diluted retentates did not reveal any permanent change in the average micelle diameter. During UF concentration of skim milk the progressive removal of calcium was affected by the partitioning of calcium between the micelles and the serum which was influenced by processing temperature."

According to the news reporters, the research concluded: "Performing UF at different temperatures altered the final calcium content of the retentates and composition and hydration of the casein micelles."

For more information on this research see: Alterations to the composition of casein micelles and retentate serum during ultrafiltration of skim milk at 10 and 40 degrees C. International Dairy Journal, 2014;35(1):63-69. International Dairy Journal can be contacted at: Elsevier Sci Ltd, The Boulevard, Langford Lane, Kidlington, Oxford OX5 1GB, Oxon, England. (Elsevier -; International Dairy Journal -

Our news journalists report that additional information may be obtained by contacting D.L.Z. Liu, Dairy Innovat Australia Ltd, Werribee, Vic 3030, Australia. Additional authors for this research include M.G. Weeks, D.E. Dunstan and G.J.O. Martin.

Keywords for this news article include: Caseins, Werribee, Phosphoproteins, Australia and New Zealand

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Source: Agriculture Week

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