Back
 OJF  Vol.3 No.4 B , October 2013
Effect of Bacteria Exopolysaccharide on Milk Gel Formation
Abstract: The main objective of this study was to determine effect of exopolysaccharide (EPS) from bacteria on formation of milk gel. Milk gel was made from 10%, 15% and 20% Reconstituted Skim Milk (RSM). EPS at different concentrations (0%, 0.2%, 0.4%, 0.6%, 0.8% and 1.0% according to our previous study) were added to RSM, heated at 60°C for 30 minute and 85°C for 30 second and cooled to 5°C before viscosity and pH were examined using viscometer and pH-meter. Viscosity was dependent on the concentrations of skim milk, increasing as the concentration of RSM increased. Lower concentration of EPS, viscosity showed a slight increase, but at 0.4% EPS, viscosity of milk gel increased rapidly and continued to increase up to 1%. Microstructure was determined using scanning electron microscope to evaluated milk gel formation. Interaction between milk protein and EPS was showed as network aggregate one and another. EPS function as binding agent between one molecule of casein and another. These results indicated that EPS could use to increase quality of milk gel. °
Cite this paper: Malaka, R. , Ohashi, T. & Baco, S. (2013). Effect of Bacteria Exopolysaccharide on Milk Gel Formation. Open Journal of Forestry, 3, 10-12. doi: 10.4236/ojf.2013.34B004.
References

[1]   Goff, H. D., Caldwell, K. B., Stanley, D. W., & Maurice, T. J. (1993). The influence of polysaccharides on the glass transition in frozen sucrose solution and ice cream. Journal of Dairy Science, 76, 1268- 1277. http://dx.doi.org/10.3168/jds.S0022-0302(93)77456-1

[2]   Malaka, R. (1997). Effect of curdlan, a bacteria poly-saccharide on the physical properties and microstructure of acid milk curd by lactic acid fermentation. Master Thesis, Japan: Faculty of Agriculture, Miyazaki University.

[3]   Snoeren, T. H. M., Both, M. P., & Smith, D. G. (1976). An electron microscopic study of carrageenan and its interaction with χ-casein. Netherlands Milk and Dairy Journal, 30, 132-141.

[4]   Sutherland, I. W. (1977). Bacterial exopolysaccharide, their nature and production in: Surface carbohydrates of the prokaryotic cell (pp. 27- 96). New York: Academic Press.

[5]   Walstra, P., & Jennes, R. (1984). Dairy chemistry and physics. New York: John Wiley and Sons.

[6]   Yoon, S. C., Yoshida, T., Mimura, T., Kaneko, Y., Nakashima, H., Yamamoto, Y., & Uryu, T. (1996). Synthesis of sulfated octadecyl ribo-oligosaccharides with potent anti-AIDS virus activity by ring-opening polymerization of a 1,4 anhydroribose derivate. Carbohydrate Research, 282, 113-123.

 
 
Top