- Title
- Comparative study of denaturation of whey protein isolate (WPI) in convective air drying and isothermal heat treatment processes
- Creator
- Haque, M. Amdadul; Aldred, Peter; Chen, Jie; Barrow, Colin; Adhikari, Benu
- Date
- 2013
- Type
- Text; Journal article
- Identifier
- http://researchonline.federation.edu.au/vital/access/HandleResolver/1959.17/67088
- Identifier
- vital:5082
- Identifier
-
https://doi.org/10.1016/j.foodchem.2013.03.035
- Identifier
- ISSN:0308-8146
- Abstract
- The extent and nature of denaturation of whey protein isolate (WPI) in convective air drying environments was measured and analysed using single droplet drying. A custom-built, single droplet drying instrument was used for this purpose. Single droplets having 5. ±. 0.1. μl volume (initial droplet diameter 1.5. ±. 0.1. mm) containing 10% (w/v) WPI were dried at air temperatures of 45, 65 and 80. °C for 600. s at constant air velocity of 0.5. m/s. The extent and nature of denaturation of WPI in isothermal heat treatment processes was measured at 65 and 80. °C for 600. s and compared with those obtained from convective air drying. The extent of denaturation of WPI in a high hydrostatic pressure environment (600. MPa for 600. s) was also determined. The results showed that at the end of 600. s of convective drying at 65. °C the denaturation of WPI was 68.3%, while it was only 10.8% during isothermal heat treatment at the same medium temperature. When the medium temperature was maintained at 80. °C, the denaturation loss of WPI was 90.0% and 68.7% during isothermal heat treatment and convective drying, respectively. The bovine serum albumin (BSA) fraction of WPI was found to be more stable in the convective drying conditions than
- Relation
- Food Chemistry Vol. 141, no. 2 (2013), p. 702-711
- Rights
- Copyright 2013 Elsevier Ltd
- Rights
- This metadata is freely available under a CCO license
- Subject
- MD Multidisciplinary; Convective drying; Denaturation kinetics; Drying kinetics; High hydrostatic pressure; Isothermal heat treatment; Single droplet; Whey protein isolate
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