Physicochemical Properties of Low-Fat Yoghurt with Whey Protein Isolates as Fat Alternative

Yıl 2019, Cilt: 16 Sayı: 2, 223 - 230, 31.12.2019

Ayşe Demet Karaman

https://doi.org/10.25308/aduziraat.658620

Öz

In this research, the effect of whey protein isolates (WPI) as a fat
alternative on the physicochemical properties of low-fat (1-2 %) yoghurt
samples during 14 days of storage was determinated. The samples were analyzed
for their chemical composition, syneresis, tyrosine, firmness, color, and free
fatty acids.  Yoghurt having 2 % of WPI
showed significantly higher amount of tyrosine but lower syneresis; as total
solids, protein, and fat were higher than the low-fat yoghurts (1% WPI and
low-fat control, p < 0.05). However, WPI addition decreased the white and
green tones but increased the yellow; thus, the addition of WPI didn’t affect
the opacity and brightness of low-fat yoghurt. The addition of WPI also gave
rise to the amounts butyric, capric, and oleic acids during storage (p <
0.05). Herein we propose 2 % WPI as a fat alternative to improve the
physicochemical properties of low-fat for a storage duration of 14 days.

Anahtar Kelimeler

low-fat yoghurt; whey protein isolates; physicochemical properties; free fatty acids; fat replacer

Kaynakça

• Anonymous (1989) Yoğurt Standardı TSE 1330 Necatibey Cad. No. 112.
• Anonymous (1994) Çiğ Süt Standardı TSE 1018 Necatibey Cad. No. 112.
• Anonymous (2016) Dairy Sector Statistics in Turkey and in the World, Turkish National Milk Council Report.
• AOAC (2000) Official Methods of Analysis of AOAC International Assoc. Off. Anal. Chem. Int. Method Ce. Association of Official Analysis Chemists International: 2–66.
• AOAC (2010) Association of Official Analysis Chemists International Official Methods of Analysis of AOAC International 962.09. 6th ed.
• Beshkova D, Simova E, Frengova G, Simov Z (1998) Production of Flavour Compounds by Yogurt Starter Cultures. Journal of Industrial Microbiology and Biotechnology 20 (3–4): 180–86.
• Damin M R, Alcântara M R, Nunes A P, Oliveira M N (2009) Effects of Milk Supplementation with Skim Milk Powder, Whey Protein Concentrate and Sodium Caseinate on Acidification Kinetics, Rheological Properties and Structure of Nonfat Stirred Yogurt. LWT - Food Science and Technology 42 (10): 1744–50.
• Guggisberg D (2009) Rheological, Microstructural and Sensory Characterization of Low-Fat and Whole Milk Set Yoghurt as Influenced by Inulin Addition. International Dairy Journal 19 (2): 107–15.
• Guggisberg D, Eberhard P, Albrecht B (2007) Rheological Characterization of Set Yoghurt Produced with Additives of Native Whey Proteins. International Dairy Journal 17 (11): 1353–59.
• Guggisberg D, Piccinali P, Schreier K (2011) Effects of Sugar Substitution with Stevia, ActilightTM and Stevia Combinations or PalatinoseTM on Rheological and Sensory Characteristics of Low-Fat and Whole Milk Set Yoghurt. International Dairy Journal 21 (9): 636–44.
• Güler Z (2007) Changes in Salted Yoghurt during Storage. International Journal of Food Science and Technology 42 (2): 235–45.
• Güler Z, Gürsoy-Balci A C (2011) Evaluation of Volatile Compounds and Free Fatty Acids in Set Types Yogurts Made of Ewes’, Goats’ Milk and Their Mixture Using Two Different Commercial Starter Cultures during Refrigerated Storage. Food Chemistry 127 (3): 1065–71.
• Güler Z, Park YW (2011) Characteristics of Physico-Chemical Properties, Volatile Compounds and Free Fatty Acid Profiles of Commercial Set-Type Turkish Yoghurts. Open Journal of Animal Sciences 01 (01): 1–8.
• Kesenkas H, Dinkçi N, Seçkin K, Kınık Ö, Gönç S, Ergönül P G, Kavas G (2011) Physicochemical, microbiological and sensory characteristics of soymilk kefir. African Journal of Microbiology Research 5 (22), 3737-3746
• Hull, M E (1947) Studies on Milk Proteins. II. Colorimetric Determination of the Partial Hydrolysis of the Proteins in Milk. Journal of Dairy Science 30 (11): 881–84.
• Ibrahim O, Glibowski P, Nour M, El-Hofi M, El-Tanboly E, And-Rabou N (2017) Effect of rosemary transglutaminase on yoghurt fortified with whey protein isolate. Polish Journal of Food and Nutrition Sciences 67 (4), 265-274.
• Isleten M, Karagul-Yuceer Y (2006) Effects of Dried Dairy Ingredients on Physical and Sensory Properties of Nonfat Yogurt. Journal of Dairy Science 89 (8): 2865–72.
• Kaminarides S, Paraskeri S, Theophiles M (2007) Comparison of the Characteristics of Set Type Yoghurt Made from Ovine Milk of Different Fat Content. International Journal of Food Science and Technology 42 (9): 1019–28.
• Lasik A D, Pikul J, Majcher M, Lasik-Kurdys M, Konieczny P (2016) Characteristics of fermented ewe’s milk product with an increased ratio of natural whey proteins to caseins. Small Ruminant Research 144, 283-289.
• Matumoto-Pintro P T, Rabiey L, Robitaille G, Britten M (2011) Use of Modified Whey Protein in Yoghurt Formulations. International Dairy Journal 21 (1): 21–26.
• Onsekizoglu Bagci P, Gunasekaran S (2016) Iron-Encapsulated Cold-Set Whey Protein Isolate Gel Powder - Part 2: Effect of Iron Fortification on Sensory and Storage Qualities of Yoghurt. International Journal of Dairy Technology 69 (4): 601–8.
• Patocka G, Cervenkova R, Narine S, Jelen P (2006) Rheological Behaviour of Dairy Products as Affected by Soluble Whey Protein Isolate. International Dairy Journal 16 (5): 399–405.
• Rao D R, Reddy J C (1984) Effects of Lactic Fermentation of Milk on Milk Lipids. Journal of Food Science 49 (3): 748–50.
• ReguŁa A (2007) Free Fatty Acid Profiles of Fermented Beverages Made from Ewe’s Milk. Lait 87 (1): 71–77.
• Şenel E, Atamer M, Gürsoy A, Öztekin F Ş (2011) Changes in Some Properties of Strained (Süzme) Goat’s Yoghurt during Storage. Small Ruminant Research 99 (2–3): 171–77.
• Shi J, Li D, Zhao X H (2017) Atributos Cualitativos Del Yogur Desnatado Preparado Con Aislado Proteínico de Lactosuero Con Reticulación Encimática o Polimerizado Térmico. CYTA - Journal of Food 15 (1): 34–40.
• Sumarmono J, Sulistyowati M, Soenarto ? (2015) Fatty Acids Profiles of Fresh Milk, Yogurt and Concentrated Yogurt from Peranakan Etawah Goat Milk. Procedia Food Science 3: 216–22.
• Torres I C, Amigo J M, Knudsen J C, Tolkach A, Mikkelsen B Q, Ispen R (2018) Rheology and microstructure of low-fat yoghurt produced with whey protein microparticles as fat replacer. International Dairy Journal 81: 62-71.
• Walsh-O’grady CD, O-Kennedy BT, Fitzgerald RJ,Lane CN (2001) A Rheological Study of Acid-Set Simulated Yogurt Milk Gels Prepared from Heat-or Pressure-Treated Milk Proteins. Lait 81 (5): 637–50.
• Wang C, Gao F, Zhang T, Wang Y, Guo M (2015) Physiochemical, textural, sensory properties and probiotic survivability of Chinese Laosuan Nai (protein fortified set yoghurt) using polymerized whey protein as a co-thickening agent. International Journal of Dairy Technology 68 (2), 261-268.
• Yıldız-Akgül F (2018) Enhancement of Torba Yoghurt with Whey Protein Isolates. International Journal of Dairy Technology 71 (4): 898–905.
• Zhang T, McCarthy J, Wang C, LiuY, 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 (4): 788–794