COMPOSITION AND THERMAL BEHAVIOUR OF WHEY PROTEIN PREPARATIONS UNDER ACIDIC CONDITIONS

Article Id: ARCC5269 | Page : 8-14
Citation :- COMPOSITION AND THERMAL BEHAVIOUR OF WHEY PROTEIN PREPARATIONS UNDER ACIDIC CONDITIONS.Asian Journal Of Dairy and Food Research.2006.(25):8-14
Ashish Kumar Singh·, Nirankar Nath and Sumit Arora!
Address : G.B. Pant University of Agriculture and Technology, Pantnagar-263145,India.

Abstract

Whey protein preparations namely UF-retentate, freeze-dried whey protein concentrate (WPC) and spray dried WPC, were investigated for their composition and thermal behavior at low pH. These preparations differed in their chemical constituents. The protein, lactose, fat and ash content of these preparations were in the range of 58.92–73.00%, 14.48–27.70%, 5.12–8.18% and 4.955.00%, respectively. Ultrafiltration procedure increased the protein and fat content in WPC significantly and simultaneously reduced levels of other constituents. Whey protein solutions (2% protein) made by dissolving these preparations exhibited maximum thermal stability at pH 3.5 and their stability decreased drastically above pH 4.0. Similarly soluble protein content was maximum at pH 3.5 and minimum at pH 4.5. UF-retentate showed highest thermal stability under acidic conditions followed by freeze dried WPC and spray dried WPC.

Keywords

References

  1. AOAC (1997). Official Methods of Analysis. 16th Edn. Association of Official Analytical Chemists. Washington D.C., U.SA
  2. Bernal, V. and Jelen, P. (1985). J. Dairy Sci. 68: 2847-2852
  3. Hall, S.M. and Iglesias, O. (1998). FoodSci. Technollntem. 3: 381-383.
  4. Harper, W. J. (1984). J.Dairy. Sci. 67: 2745-2754
  5. Harwalkar, V. R. etal (1985). Mi/chwissenschaft. 40: 31-34
  6. Harwalkar,V.R. (1980). J. Dairy. Sci. 63: 1043- 1051
  7. Hoogstratan, J.J. (1987). IDFBulletin No.17: 212-215 pp.
  8. Ibrahim, ES. etal. (1995). Egyptian J. Dairy Sci. 23: 177-188.
  9. Jayaprakasha, H. M. and Brueckner, H. (1999). J. Food Sci. Technol36: 199-204.
  10. Jayaprakasha, H.M. etal (1995). Japanese J. Dairy Food Sci. 44: 113-121
  11. Jayaprkasha, H. M. (1992). Ph.D. Thesis. National Dairy Research Institute. Deemed University, Kamal, India.
  12. Jelen, P. and Buchhheim, W. (1984). Mi/chwissenschalt, 39: 215-218
  13. Kulmyrzaev, A. etal (2000). J. Agric. Food Chern. 48: 1593-1597
  14. Mcintosh, G.H. etal (1998). Int. DairyJ. 8: 425-434
  15. Morr, C.V and Ha, E.Y.W. (1993). Crit. Rev. Food Sci. & Nutri. 33: 431-476.
  16. Morr, C.v. (1987). J. Food Sci. 52: 312-319.
  17. Morr, C.v. and Foegeding, EA (1990). Food Technol44: 100-112.
  18. Mulvihill, D.M. (1991). FoodRes. 51: 65-73
  19. Patocka, Jeta/. (1986). Mi/chwissenschaft. 41: 490-493
  20. Snedecor, GW. and Cochran, w.G. (1994). Statistical Methods- 8th Ed. Affiliated East-West Press, Iowa State Univ. Press
  21. Tratnik, J. and Kersev, J.C. (1991). Mi/chwissenschaft46: 91-97.
  22. Vaghela, M. and. Kilara A. (1996). J. Dairy Sci. 79: 1172-1183
  23. Vij~yakumar, B. and Sangwan, R.B. (2000). Indian J.Dairy Sci. 53: 248-254

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