Texture-modifying properties of microbial transglutaminase on 2 popular Hungarian products: Trappist cheese and frankfurter

Darnay, L. and Tóth, A. and Salamon, B. and Papik, K. and Oros, G. and Jónás, G. and Horti, K. and Koncz, K. and Friedrich, L. (2017) Texture-modifying properties of microbial transglutaminase on 2 popular Hungarian products: Trappist cheese and frankfurter. Acta Alimentaria, 46 (1). pp. 116-122. ISSN 0139-3006

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Abstract

The aim of this study was to show how microbial transglutaminase (mTG) can be used as an effective texture-modifier for two popular Hungarian products: Trappist cheese and frankfurter. In both cases we investigated how components of these products, milkfat in cheese and phosphate in frankfurter, can be substituted by mTG. Therefore, Trappist cheese samples were produced from cow milk of 2.8%, 3.5%, and 5% milk fat. The effect of ripening was evaluated with Texture Profile Analysis (TPA) and sensory evaluation (scoring test, 10 trained panellists). Springiness and cohesiveness values were significantly higher by enzyme-treated semi-hard cheese samples at lower milk fat levels. Sensory evaluation showed that the enzyme-treatment led to higher scores by cheese samples made from cow milk of 3.5% and 5% milk fat. Frankfurter was made with 0.1%, 0.3%, 0.5%, and 0.7% tetrasodium pyrophosphate, and partly enzyme-treated with 0.2% commercial mTG enzyme preparation. Our results showed that mTG is able to significantly improve hardness and crunchiness by frankfurters made with 0.1% phosphate addition. Our sensory evaluation suggests that mTG and phosphate should be applied in combination in order to have a final product with recognisably more homogeneous texture.

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