E3S Web Conf.
Volume 67, 2018The 3rd International Tropical Renewable Energy Conference “Sustainable Development of Tropical Renewable Energy” (i-TREC 2018)
|Number of page(s)||7|
|Section||Multifunctional and Advanced Materials|
|Published online||26 November 2018|
Effect of transglutaminase addition to chemical, physical, and culture survivability of yogurt during storage period
Department of Chemical Engineering, Faculty of Engineering, Universitas Indonesia, Kampus Baru UI, Depok 16424, West Jawa, Indonesia
* Coresponding author: firstname.lastname@example.org
One way to improve the physical and sensory properties of low fat or nonfat yogurt is by adding a small amount of transglutaminase enzyme into yogurt. Transglutaminase is an enzyme that can cause crosslinking in proteins and is particularly suited for improving the functional properties of food proteins. This study was conducted in order to evaluate the effect of transglutaminase (TGase) addition on some properties of yogurt such as fermentation time, pH, total of lactic acid bacteria, syneresis, viscosity, and microstructure. The enzyme was added at different production steps, those are before addition of starter culture and simultaneously with starter culture addition. Another variations are the concentration of the enzyme (0.5; 1.0; and 2 grams enzyme/gram milk protein) and the storage period (1, 8, and 15 days of storage period). It was shown that there were no significant effect of transglutaminase addition to fermentation time. Acid development rate as well as syneresis percentage were reduced with increasing TGase doses meanwhile the viscosity was increased. TGase addition was also shown affecting the total lactic acid bacteria. Based on the electron microscope results, due to the formation of cross-links protein, enzyme addition caused proteins to be distributed more evenly in gel network.
© The Authors, published by EDP Sciences, 2018
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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