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Heat stability and acid gelation properties of calcium-enriched reconstituted skim milk affected by ultrasonication

Published online by Cambridge University Press:  03 March 2014

Jayani Chandrapala ,
Don Bui ,
Sandra Kentish  and
Muthupandian Ashokkumar
Jayani Chandrapala*
Affiliation:
Advanced Food Systems Research Unit, College of Health and Biomedicine, Victoria University, VIC 3030, Australia School of Chemistry/Department of Chemical and Biomolecular Engineering, University of Melbourne, VIC 3010, Australia
Don Bui
Affiliation:
School of Chemistry/Department of Chemical and Biomolecular Engineering, University of Melbourne, VIC 3010, Australia
Sandra Kentish
Affiliation:
School of Chemistry/Department of Chemical and Biomolecular Engineering, University of Melbourne, VIC 3010, Australia
Muthupandian Ashokkumar
Affiliation:
School of Chemistry/Department of Chemical and Biomolecular Engineering, University of Melbourne, VIC 3010, Australia
*
*For correspondence; e-mail: Janage.Chandrapala@vu.edu.au
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Abstract

The aggregation of proteins after heating of calcium-fortified milks has been an ongoing problem in the dairy industry. This undesirable effect restricts the manufacture of calcium rich dairy products. To overcome this problem, a completely new approach in controlling the heat stability of dairy protein solutions, developed in our lab, has been employed. In this approach, high intensity, low frequency ultrasound is applied for a very short duration after a pre-heating step at ⩾70 °C. The ultrasound breaks apart whey/whey and whey/casein aggregates through the process of acoustic cavitation. Protein aggregates do not reform on subsequent post-heating, thereby making the systems heat stable. In this paper, the acid gelation properties of ultrasonicated calcium-enriched skim milks have also been investigated. It is shown that ultrasonication alone does not change the gelation properties significantly whereas a sequence of preheating (72 °C/1 min) followed by ultrasonication leads to decreased gelation times, decreased gel syneresis and increased skim milk viscosity in comparison to heating alone. Overall, ultrasonication has the potential to provide calcium-fortified dairy products with increased heat stability. However, enhanced gelation properties can only be achieved when ultrasonication is completed in conjunction with heating.

Keywords

Ultrasoundskim milkheat stabilitycalcium
Type
Research Article
Information
Journal of Dairy Research , Volume 81 , Issue 2 , May 2014 , pp. 238 - 244
Copyright
Copyright © Proprietors of Journal of Dairy Research 2014 

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References

Ashokkumar, M, Lee, J, Kentish, SE & Grieser, F 2004 Bubbles in an acoustic field: an overview. Ultrasonics Sonochemistry 14 470–475Google Scholar
Ashokkumar, M, Lee, J, Zisu, B, Bhaskaracharya, R, Palmer, M & Kentish, SE 2009a Ultrasonication increases the heat stability of whey proteins. Journal of Dairy Science 92 5353–5356Google Scholar
Ashokkumar, M, Kentish, SE, Lee, J, Zisu, B, Palmer, M & Augustin, MA, inventors 2009b Processing of dairy ingredients by ultra-ultrasonication. PCT International Application WO2009/079691Google Scholar
Chandrapala, J, Zisu, B, Palmer, M, Kentish, SE & Ashokkumar, M 2011 Effects of ultrasound on the thermal and structural characteristics of proteins in reconstituted whey protein concentrate. Ultrasonics Sonochemistry 18 951–957Google Scholar
Chandrapala, J, Zisu, B, Kentish, SE & Ashokkumar, M 2012 A Possible Mechanism to Understand the Ultrasound Induced Heat Stability of Whey Protein Concentrates. Melbourne, Australia: International Nonthermal Food Processing Workshop – FIESTAGoogle Scholar
Graveland Bikker, J & Anema, SG 2003 Effect of individual whey proteins on the rheological properties of acid gels prepared from heated skim milk. International Dairy Journal 13 401–408Google Scholar
Gulseren, I, Guzey, D, Bruce, D & Weiss, J 2007 Structural and functional changes in ultrasonicated bovine serum albumin solutions. Ultrasonics Sonochemistry 14 173–183Google Scholar
Lucey, JA, Teo, CT, Munro, PA & Singh, H 1997 Rheological properties at small (dynamic) and large (yield) deformations of acid gels made from heated milk. Journal of Dairy Research 64 591–600Google Scholar
McKinnon, IR, Yap, SE, Augustin, MA & Hemar, Y 2009 Diffusing wave spectroscopy investigation of heated reconstituted skim milks containing calcium chloride. Food Hydrocolloids 23 1127–1133Google Scholar
Nguyen, NHA & Anema, SG 2010 Effect of ultrasonication on the properties of skim milk used in the formation of acid gels. Innovation Food Science and Emerging Technology 11 616–622Google Scholar
Ozcan, T, Horne, D & Lucey, JA 2011 Effect of increasing the colloidal calcium phosphate of milk on the texture and microstructure of yoghurt. Journal of Dairy Science 94 5278–5288CrossRefGoogle Scholar
Riener, J, Noci, F, Cronin, DA, Morgan, DJ & Lyng, G 2009 The effect of thermoultrasonication of milk on selected physicochemical and microstructural properties of yoghurt gels during fermentation. Food Chemistry 114 905–911Google Scholar
Riener, J, Noci, F, Cronin, DA, Morgan, DJ & Lyng, G 2010 A comparison of selected quality characteristics of yoghurts prepared from thermosonicated and conventionally heated milks. Food Chemistry 119 1108–1110Google Scholar
van Vliet, T, Lakemond, CMM & Visschers, RW 2004 Rheology and structure of milk protein gels. Current Opinion in Colloid and Interface Science 9 298–304CrossRefGoogle Scholar
Vercet, A, Oria, R, Marquina, P, Crelier, S & Lopez-Buesa, P 2002 Rheological properties of yoghurt made with milk submitted to manothermoultrasonication. Journal of Agricltural and Food Chemistry 50 6165–6171Google Scholar