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Addition of pectin and whey protein concentrate minimises the generation of acid whey in Greek-style yogurt

  • Rabin Gyawali (a1) and Salam A Ibrahim (a1)
Abstract

The objective of the study reported in this Research Communication was to investigate the effects of pectin and whey protein concentrate (WPC) on the generation of acid whey during Greek-style yogurt (GSY) processing. Yogurt samples were prepared using pectin (0·05%, w/v) and whey protein concentrate (WPC-80) (1%, w/v) as possible ingredients that reduce the acid whey production. Control yogurt sample was prepared without addition of these ingredients. The results showed that yogurt made with pectin plus WPC had significantly higher water holding capacity (~56%) than the control (33%). Similarly, yogurt supplemented with pectin plus WPC exhibited 15% less susceptibility to syneresis compared to the control (P < 0·05). Viability of L. bulgaricus and S. thermophilus in all yogurts remained ≥7·0 and ≥8·0 log CFU/g respectively. Native PAGE analysis showed an interaction between pectin and WPC. Pectin hinders the formation of large oligomeric aggregates of whey protein which correlates with an increase in WHC and a decrease in syneresis. Our results demonstrated that a combination of pectin and WPC have the potential to limit the quantity of acid whey generation in GSY manufacturing. Thus, these ingredients have positive implications for dairy industry in the production of GSY.

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Corresponding author
*For correspondence; e-mail: ibrah001@ncat.edu
References
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AOAC 2002 Association of Official Analytical Chemists: Official Methods of Analysis, Vol. II. 17th edition. Gaithersburg, MD
Bong, D & Moraru, C 2014 Use of micellar casein concentrate for Greek-style yogurt manufacturing: effects on processing and product properties. Journal of Dairy Science 97 12591269
Boynton, RD & Novakovic, AM 2013 Industry evaluations of the status and prospects for the burgeoning New York Greek-style yogurt industry. Program on Dairy Markets and Policy Research Paper Series, Research paper number RP13-01
Desai, NT, Shepard, L & Drake, MA 2013. Sensory properties and drivers of liking for Greek yogurts. Journal of Dairy Science 96 74547466
Guzmán-González, M, Morais, F, Ramos, M & Amigo, L 1999 Influence of skimmed milk concentrate replacement by dry dairy products in a low fat set-type yoghurt model system. I: Use of whey protein concentrates, milk protein concentrates and skimmed milk powder. Journal of the Science of Food and Agriculture 79 11171122
Elliott, J 2013 Whey too much: Greek yogurt's dark side. Accessed on August 28, 2017. http://modernfarmer.com/2013/05/whey-too-much-greek-yogurts-dark-side
Erickson, BE 2017 Acid whey is the waste product an untapped goldmine? Accessed on August 28, 2017. http://cen.acs.org/articles/95/i6/Acid-whey-waste-product-untapped.html
Gyawali, R & Ibrahim, SA 2016 Effects of hydrocolloids and processing conditions on acid whey production with reference to Greek yogurt. Trends in Food Science and Technology 56 6176
Kailasapathy, K, Supriadi, D & Hourigan, J 1996 Effect of partially replacing skim milk powder with whey protein concentrate on buffering capacity of yoghurt. Australian Journal of Dairy Technology 51 8993
Mohamed, M & Morris, H 1987 Textural and microstructural properties of rennet-induced milk coagulum as affected by the addition of soy protein isolate. Journal of Texture Studies 18 137155
Puvanenthiran, A, Williams, RPW & Augustin, MA 2002 Structure and visco-elastic properties of set yoghurt with altered casein to whey protein ratios. International Dairy Journal 12 383391
Remeuf, F, Mohammed, S, Sodini, I & Tissier, J 2003 Preliminary observations on the effects of milk fortification and heating on microstructure and physical properties of stirred yogurt. International Dairy Journal 13 773782
Saha, D & Bhattacharya, S 2010 Hydrocolloids as thickening and gelling agents in food: a critical review. Journal of Food Science and Technology 47 587597
Smithers, GW 2015 Whey-ing up the options - yesterday, today and tomorrow. International Dairy Journal 48 214
Soukoulis, C, Panagiotidis, P, Koureli, R & Tzia, C 2007 Industrial yogurt manufacture: monitoring of fermentation process and improvement of final product quality. Journal of Dairy Science 90 26412654
Tasneem, M, Siddique, F, Ahmad, A & Farooq, U 2014 Stabilizers: indispensable substances in dairy products of high rheology. Critical Reviews in Food Science and Nutrition 54 869879
Zhang, T, McCarthy, J, Wang, G, Liu, Y & Guo, M 2015. Physiochemical properties, microstructure, and probiotic survivability of nonfat goats’ milk yogurt using heat-treated whey protein concentrate as fat replacer. Journal of Food Science 80 M788M794
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Journal of Dairy Research
  • ISSN: 0022-0299
  • EISSN: 1469-7629
  • URL: /core/journals/journal-of-dairy-research
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