Effect of moisture content and water mobility on microwave expansion of imitation cheese.

The effects of moisture content (60–45%), and refrigerated storage (1–9 days) on the functional properties, water mobility and microwave expansion of imitation cheese are investigated. Cheese hardness, elastic (G 0) and viscous moduli (G00) increased with decreasing moisture content and decreased during storage. Flowability, loss tangent (tan d) and water mobility decreased with decreasing moisture content and increased during storage. Microwave expansion of imitation cheese decreased with decreasing moisture content and increased with prolonging storage time prior to microwaving. The changes in texture, rheology and flowability of cheese with decreasing moisture content, changes in water mobility and storage time reflected the level of cheese plasticisation by water and had strong linear correlations with microwave expansion. This work provides evidence that moisture content influences microwave expansion of imitation cheese by providing the driving force for expansion and plasticising the cheese matrix. 2010 Elsevier Ltd. All rights reserved.

[1]  D. McMahon,et al.  Water Partitioning in Mozzarella Cheese and Its Relationship to Cheese Meltability , 1999 .

[2]  P. R. Kulkarni,et al.  Resistant Starch-A Review. , 2006, Comprehensive reviews in food science and food safety.

[3]  E. D. O’Riordan,et al.  Empirical and Dynamic Rheological Data Correlation to Characterize Melt Characteristics of Imitation Cheese , 1999 .

[4]  J. Kokini,et al.  Effect of Xanthan Gum and CMC on the Structure and Texture of Corn Flour Pellets Expanded by Microwave Heating , 2004 .

[5]  M. O’Sullivan,et al.  Increasing the moisture content of imitation cheese: effects on texture, rheology and microstructure , 2005 .

[6]  A. M. Foster,et al.  Effects on microwave power output of size of load continuous (intermittent) use, position of load and variation in mains supply voltage , 1994 .

[7]  S. Gunasekaran,et al.  Nuclear magnetic resonance study of water mobility in pasta filata and non-pasta filata mozzarella. , 2001, Journal of dairy science.

[8]  J. Lyng,et al.  Effect of refrigerated storage on water mobility and microwave expansion of imitation cheese containing resistant starch , 2008 .

[9]  R. Anantheswaran,et al.  Studies on Popping of Popcorn in a Microwave Oven , 1988 .

[10]  E. O'Riordan,et al.  Effect of resistant starch on the water binding properties of imitation cheese , 2008 .

[11]  S. Gunasekaran,et al.  Estimating Softening Point of Cheeses , 1999 .

[12]  E. Chiotelli,et al.  Characterization of water mobility in biscuit dough using a low-field 1H NMR technique , 2006 .

[13]  J. Kokini,et al.  Influence of Fat on Expansion of Glassy Amylopectin Extrudates by Microwave Heating , 2002 .

[14]  J. Kokini,et al.  Factors That Influence the Microwave Expansion of Glassy Amylopectin Extrudates , 2003 .

[15]  Bruce J. Balcom,et al.  Magnetic resonance relaxation measurements to determine oil and water content in fried foods , 2006 .

[16]  M. Peleg,et al.  Stiffness assessment from jagged force-deformation relationships , 1995 .

[17]  Jozef L. Kokini,et al.  Nucleation and Expansion During Extrusion and Microwave Heating of Cereal Foods. , 2003, Comprehensive reviews in food science and food safety.

[18]  L. Greenspan.  Humidity Fixed Points of Binary Saturated Aqueous Solutions , 1977, Journal of Research of the National Bureau of Standards. Section A, Physics and Chemistry.

[19]  E. O'Riordan,et al.  Replacement of fat with functional fibre in imitation cheese , 2007 .

[20]  Micha Peleg,et al.  A mathematical model of crunchiness/crispness loss in breakfast cereals , 1994 .

[21]  An-I Yeh,et al.  Expansion of Rice Pellets: Examination of Glass Transition and Expansion Temperature , 2000 .

[22]  J. Lyng,et al.  Microwave expansion of imitation cheese containing resistant starch , 2008 .

[23]  G. Ziegler,et al.  Investigation of imitation cheese matrix development using light microscopy and NMR relaxometry , 2008 .

[24]  W. Kerr,et al.  Water dynamics in white bread and starch gels as affected by water and gluten content , 2004 .