Influence of transglutaminase-induced cross-linking on properties of fish gelatin films

J. B. Yi, Y. T. Kim, H. J. Bae, W. S. Whiteside, H. J. Park

    Research output: Contribution to journalArticlepeer-review

    100 Citations (Scopus)

    Abstract

    Fish gelatin (FG) is a potential alternative to current mammalian (beef and pork) gelatin. However, its physical and thermal properties limit its use in many applications. The treatment of microbial transglutaminase (MTGase) on FG could be a practical way to increase the use of FG films in various applications. Physical properties, barrier properties, and molecular weight change of FG films were measured. The viscosity of the MTGase-treated FG solution significantly (P < 0.05) increased from 6.81 ± 0.65 cP to 35.04 ± 3.59 cP as the reaction time and concentration of MTGase increased. After employing 2% of MTGase into FG solution, the tensile strength increased from 48.03 ± 5.45 MPa to 68.00 ± 1.9 MPa, while percent elongation decreased from 13.1% ± 2.90% to 1.47% ± 0.05%. Oxygen barrier property was significantly (P < 0.05) increased from 7.24 ± 1.48 cc·m/m2·d to 17.69 ± 3.08 cc·m/m2·d, while water vapor permeability was not statistically (P < 0.05) different. The melting temperature (Tm) measured by differential scanning calorimetry increased from 124.78 ± 1.98°C to 158.49 ± 2.68°C as the enzyme reaction time increased. The color values of L*, a*, and b* were changed from 95.56 ± 0.09 to 95.50 ± 0.06, from -0.17 ± 0.01 to -0.23 ± 0.00, and from 3.17 ± 0.04 to 3.47 ± 0.09, respectively. The opacity significantly (P < 0.05) increased from 1.43% ± 0.32% to 2.87% ± 0.06%. SDS-PAGE results showed that the molecular weight of fish gelatin films increased when the MTGase reaction takes place.

    Original languageEnglish
    Pages (from-to)E376-E383
    JournalJournal of Food Science
    Volume71
    Issue number9
    DOIs
    Publication statusPublished - 2006 Nov

    Keywords

    • Cross-linking
    • Edible film
    • Fish gelatin
    • Fish gelatin films
    • Microbial transglutaminase

    ASJC Scopus subject areas

    • Food Science

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