The effects of microbial transglutaminase on the properties of fish myofibrillar protein film
2017
Kaewprachu, Pimonpan | Osako, Kazufumi | Tongdeesoontorn, Wirongrong | Rawdkuen, Saroat
In this study, the effects of microbial transglutaminase (MTGase) on the properties of fish myofibrillar protein (FMP) films were investigated. As MTGase content increased, the thickness and tensile strength of the FMP films increased. In contrast, their elongation at break (167.49–85.61%), film transparency, water vapor permeability (2.38–2.02×10−9gm−1s−1Pa−1), moisture content, film solubility, and degree of swelling all decreased (P<0.05). Lightness also decreased, and yellowness increased as MTGase content was increased (P<0.05). MTGase action also significantly improved barrier properties and thermal stability of films. Electrophoretic and FT-IR studies revealed that cross-linking and conformational changes were pronounced in film treated with MTGase. Based on these results, the addition of MTGase produced a good alternative method for improving FMP film properties; however, the mechanical and water barrier properties of the resulting films need further development.
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