Mechanism of Gelatinization in Milk Product after Addition of the Passion Fruit Juice by Analysis of the Physicochemical and Microsructural Properties

Authors

  • R. Malaka
  • . Hajrawati

DOI:

https://doi.org/10.20956/jitp.v2i3.718

Abstract

The addition of certain fruit juices to milk products as a way to create new flavor has been known to also cause an interaction between the fruit juice and the components of the milk product. The mechanism of gelatinization in milk products as a result of adding the passion (Passiflora edulis Sims) fruit juice and by processing methods like heating and acidity will influence the final milk product. In this study, the mechanism of gelatinization is established through the observation of the products’s microstructure. This study was arranged factorially according to Completely Randomised Design. The first factor was passion fruit juice concentration (7.5 and 10%) and the second factor was ripening time (0, 1, 2 and 3 weeks). The variables observed were physical properties, which was done by the measurement of pH and lactic acid concentration. The changes in physical properties were monitored by observation of product microstructure by light microscopic with histopathological technique. The best cheese product was achieved with a passion fruit juice concentration of 10%. The product observed had a more compact microstructure at a ripening time of 3 weeks with pH of  4,29 and lactic acid percentage of 1.27

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References

Adnan, M. 1984. Kimia dan Teknologi Pengolahan Air Susu. Andi Offset, Yogyakarta

Aguilera, J. M. and H. G. Kessler. 1988. Physico-chemical and rheological properties of milk fat globules with modified membranes. Milchwissenschaft, 43(7): 413 – 415.

Anderson, D. L. and V. V. Mistry. 1993. Reduce fat cheddar cheese from condensed milk. The south Dakota Agrikultural Experiment Station, South Dakota

Bylund. 1995. Dairy Processing Handbook. Tetra Pak Processing Systems, Sweden

Buckle, K. A., R. A. Edward., G. H. Fleet dan M. Wooton. 1987. Ilmu Pangan. Penerjemah Purnomo, H dan Adiono. Universitas Indonesia Press, Jakarta.

Malaka, R. 1997. Effect of Curdlan, A. Bacteria Pollysacharide On The physical Fermentation. Thesis, Faculty of Agriculture Miyazaki University, Japan.

Nurwantoro dan Djarijah, 1994. Mikrobiologi Pangan Hewani-Nabati. Penerbit Kanisius, Yogyakarta.

Ohashi, T., S. Nagai, K. Masaoka, S. Haga, K. Yamauchi, and N.F. Olson. 1978. Physical properties and microstructure of cream cheese. Nippon Shokugin Kogyo Gakkaishi, 30 (5) : 303 – 307.

Ohashi, T., S. Haga, K. Yamauchi, and N. F. Olson. 1983. Scanning electron microscopy of casein micelle network in milk rennet curd. Jpn. J. Zootech. Sci., 54(8): 479 – 481.

Phadungath, C. 2005. The mechanism and properties of acid-coagulated milk gels. Songklanakarin J. Sci. Technology. 27(2):433-448. http://www. chanokphat _p@ yahoo.com, Diakses 28/01/2006.

Pruthi, 1963. Passion Fruits, Tropical and Subtropical Fruits. The Evi Publishing Company, Inc., Florida. P:53-57

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Published

2016-07-27

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