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

Published online by Cambridge University Press:  22 May 2018

Rabin Gyawali  and
Salam A Ibrahim
Rabin Gyawali
Affiliation:
Food Microbiology and Biotechnology Laboratory, Food and Nutritional Science Program, North Carolina A&T State University, Greensboro, NC 27411-1064
Salam A Ibrahim*
Affiliation:
Food Microbiology and Biotechnology Laboratory, Food and Nutritional Science Program, North Carolina A&T State University, Greensboro, NC 27411-1064
*
*For correspondence; e-mail: ibrah001@ncat.edu
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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.

Keywords

Ingredientspectinwhey protein concentrateacid wheywater holding capacityGreek yogurt
Type
Research Article
Information
Journal of Dairy Research , Volume 85 , Issue 2 , May 2018 , pp. 238 - 242
Copyright
Copyright © Hannah Dairy Research Foundation 2018 

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References

AOAC 2002 Association of Official Analytical Chemists: Official Methods of Analysis, Vol. II. 17th edition. Gaithersburg, MDGoogle Scholar
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 1259–1269Google Scholar
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 RP13-01Google Scholar
Desai, NT, Shepard, L & Drake, MA 2013. Sensory properties and drivers of liking for Greek yogurts. Journal of Dairy Science 96 7454–7466Google Scholar
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 1117–11223.0.CO;2-F>CrossRefGoogle Scholar
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-sideGoogle Scholar
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.htmlGoogle Scholar
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 61–76Google Scholar
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 89–93Google Scholar
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 18 137–155CrossRefGoogle Scholar
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 12 383–391Google Scholar
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 13 773–782Google Scholar
Saha, D & Bhattacharya, S 2010 Hydrocolloids as thickening and gelling agents in food: a critical review. Journal of Food Science and Technology 47 587–597Google Scholar
Smithers, GW 2015 Whey-ing up the options - yesterday, today and tomorrow. International Dairy Journal 48 2–14Google Scholar
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 2641–2654CrossRefGoogle ScholarPubMed
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 54 869–879Google Scholar
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 M788–M794Google Scholar