The effects of varying fat content (from 13.5 to 50.4% w/w) and curd dipping temperatures (75, 85 and 95°C) on changes in viscoelastic properties, texture and appearance of Gaziantep cheese were examined. Viscoelastic properties of cheeses were studied using creep and recovery tests. Creep measurements showed that fat reduction from 50.4% (w/w) to 13.5% (w/w) decreased viscoelasticity while dipping into hot whey increased that of low-fat cheeses. Textural characteristics (hardness, gumminess, cohesiveness, springiness) were determined by texture profile analysis (TPA). Hardness, gumminess, cohesiveness and springiness values increased with decreasing fat content (P < 0.05). The application of curd dipping also increased hardness, gumminess, cohesiveness and springiness. Textural parameters were correlated with each others, except cohesiveness. Fat in dry matter correlated only with hardness and springiness, however curd dipping process correlated with all TPA parameters considered in this study. Colour of the cheese samples was affected by fat content as L value and b value decreased with decreasing fat content (P < 0.05). The decrease in curd dipping temperature increased the L value (P < 0.05) and decreased the b value.
Bryant A. , Ustunol Z. and Steffe J. (1995). Texture of Cheddar cheese as influenced by fat reduction . Journal of Food Science60: 1216-1219 .
4.
Drake M.A. and Gerard P.D. (1999). Relationship between instrumental and sensory measurements of cheese texture . Journal of Texture Studies30: 451-476 .
5.
Drake M.A. and Swanson B.G. (1995). Reduced- and low-fat cheese technology: A review . Trends in Foods Science and Technology6: 366-369 .
6.
Egan H. , Kirk R.S. and Sawyer R. (1981). Pearson’s Chemical Analysis of Foods. New York: Longman Inc. pp. 15-16.
7.
Elmer H.M. (1978). Standard Methods for the Examination of Dairy Products, 14th edn.Washington, DC: American Public Health Association . pp. 239-245.
8.
Fife R.L. , McMahon D.J. and Oberg C.J. (1996). Functionality of low-fat Mozzarella Cheese . Journal of Dairy Science79: 1093-1910 .
9.
Gilles J. and Lawrence R.C. (1985). The yield of cheese . New Zealand Journal of Dairy Science and Technology20: 205-214 .
10.
Guinee T.P. , Auty M.A.E. , Mullins C. , Corcoran M.O. and Mulholland E.O. (2000a). Preliminary observations on effects of fat content and degree of fat emulsification on the structure-functional relationship of Cheddar-type cheese . Journal of Texture Studies31: 645-663 .
11.
Guinee T.P. , Auty M.A.E. and Fenelon M.A. (2000b). The effect of fat content on the rheology, microstructure and heat-induced functional characteristics of Cheddar cheese . International Dairy Journal10: 277-288 .
12.
Halim H.K. and Shoemaker C.F. (1990). Effect of addition of α-, β- and γ-casein and Na-caseinate on viscoelastic properties of skimmed milk curd . Journal of Texture Studies21: 323-337 .
13.
Kahyaoglu T. and Kaya S. (2003). Effects of heat treatment and fat reduction on the rheological and functional properties of Gaziantep cheese . International Dairy Journal13: 867-875 .
14.
Kaya S. (2002). Effect of salt on hardness and whiteness of Gaziantep cheese during short-term brining . Journal of Food Engineering55: 155-159 .
15.
Kaya S. and Oner M.D. (1996). Water activity and moisture sorption isotherms of Gaziantep cheese . Journal of Food Quality19: 121-132 .
16.
Kaya S. , Kaya A. and Oner M.D. (1999). The effect of salt concentration on rancidity in Gaziantep cheese . Journal of Science of Food and Agriculture79: 213-219 .
17.
Konstance R.P and Holsinger V.H. (1992). Developments of rheological test methods for cheese . Food Technology1: 105-109 .
18.
Kuo M.I. , Wang Y.C. and Gunasekaran S. (2000). A viscoelasticity index for cheese meltability evaluation . Journal of Dairy Science83: 412-417 .
19.
Kuo M.-I. , Wang Y.-C. , Gunasakaran S. and Olson N.F. (2001). Effect of heat treatments on the meltability of cheeses . Journal of Dairy Science84: 1937-1943 .
20.
Lynch M.G. and Mulvihill D.M. (1994). The influence of caseins on the rheology of η-carrageenan gels . Food Hydrocolloids8: 317-329 .
21.
Ma L. , Drake M.A. , Barbosa-Canovas G.V. and Swanson B.G. (1996). Viscoelastic properties of reduced-fat and full-fat Cheddar cheeses . Journal of Food Science61: 821-823 .
22.
Merrill R.K. , Oberg C.J. and McMahon D.J. (1994). Mozzarella cheese: a method for manufacturing reduced-fat Mozzarella cheese . Journal of Dairy Science77: 1783-1789
23.
Messens W. , Walle D.V. , Arevalo J. , Dewettinck K. and Huyghebaert A. (2000). Rheological properties of high-pressure-treated Gouda cheese . International Dairy Journal10: 359-367 .
24.
Metzger L.E. , Barbano D.M. , Rudan M.A. , Kindstedt P.S. and Guo M.R. (2000). Whiteness change during heating and cooling of Mozzarella cheese . Journal of Dairy Science83: 1-10 .
25.
Mohsenin N.N. (1986). Physical Properties of Plant and Animal Materials: Structure, Physical Characteristics and Mechanical Properties: Rheology and Texture of Food Materials. New York: Gordon and Breach, Sci. Publ., Inc. pp. 383-480.
26.
Olson N.F. , Gunasekaran S. and Bogenrief D.D. (1996). Chemical and physical properties of cheese and interactions . Netherlands Milk and Dairy Journal50: 279-294 .
27.
Peleg M. (1987). The basics of solid food rheology. In: Moskowitz P. (ed), Food Texture. New York: Marcel Dekker . pp. 391-394.
28.
Rodriguez J. (1998). Recent advances in the development of low-fat cheeses . Trends in Food Science and Technology9: 249-254 .
29.
Rosenborg M. , Wang Z. , Chuang S.L. and Shoemaker C.F. (1995). Viscoelastic property changes in Cheddar cheese during ripening . Journal of Food Science60(3): 640-644 .
30.
Rudan M.A. , Barbano D.M. , Guo M.R. and Kindstedt P.S. (1998). Effect of modification of particle size by homogenization on, composition, proteolysis, functionality, and appearance of reduced fat Mozzarella cheese . Journal of Dairy Science81: 2065-2076 .
31.
Rudan, M.A. , Barbano D.M. , Yun J.J. and Kindstedt P.S. (1999). Effect of fat reduction on chemical composition, proteolysis, functionality, and yield of Mozzarella cheese . Journal of Dairy Science82: 661-672 .
32.
Scott R. (1986). Cheesemaking Practise, 2nd edn.New York: AVI . pp. 195-197.
33.
Subramanian R. and Gunasekaran S. (1997). Small amplitude oscillatory shear studies on Mozzarella cheese. Part II. Relaxation spectrum . Journal of Texture Studies28: 643-656 .
Tunick M.H. and Shieh J.J. (1995). Rheology of reduced-fat Mozzarella cheese. In: Malin E.L. and Tunick M.H. (eds), Chemistry of Structure-Function Relationships in CheeseNew York: Plenum Press . pp. 7-19.
36.
Tunick M.H. , Mackey K.L. , Smith P.W. and Holsinger V.H. (1991). Effect of composition and storage on the texture of Mozzarella cheese . Netherlands Milk and Dairy Journal45: 117-125 .
37.
Tunick M.H. , Malin E.L. , Smith P.W. , Shieh J. , Sullivan B.C. , Mackey K.L. and Holsinger V.H. (1993). Proteolysis and rheology of low and full fat Mozzarella cheeses prepared from homogenized milk . Journal of Dairy Science76: 3621-3628 .
38.
Van Camp J. and Huyghebaert A. (1995). A comparative rheological study of heat and high pressure induced whey protein gels . Food Chemistry54: 357-364 .
39.
Van Vliet T. (1991). Terminology to be used in cheese rheology . Bulletin of International Dairy Federation268: 5-15 .
