Fisheries Science

, Volume 85, Issue 5, pp 883–893 | Cite as

Quality improvement of thermally induced surimi gels by extensive washing for dressed white croaker to remove contamination by body surface mucus proteases

  • Nobuhiko UekiEmail author
  • Yoko Matsuoka
  • Jianrong Wan
  • Shugo Watabe
Original Article Food Science and Technology


Body surface mucus was scraped off from white croaker Pennahia argentata after washing with two different procedures, suspended in cold water and filtered through a filter paper. The filtrate thus obtained was lyophilized and defined as the fish body surface substances. The relative level of the substances obtained after high-pressure water washing was 28.8% and significantly lower than those obtained after conventional washing (68.8%) and without washing (100%). The breaking strength of thermally induced gels prepared by pre-heating at 65 °C mimicking modori for 60 min after the high-pressure water washing was 3.8 N and was significantly higher than that after the conventional washing (2.6 N) and without washing (2.1 N). These results suggest that rheological properties of thermally induced gels can be improved with an extensive washing of fish material. The degradation of myosin heavy chain was recognized, when the water soluble fraction of the lyophilized powder of the fish body surface mucus was added into the ordinary muscle homogenate at around 60 °C and pH 8.15, suggesting that proteases were present in the fish body surface mucus. Such novel findings are useful for avoiding the modori phenomenon and thus improving the quality of surimi-based products.


Body surface mucus Modori Myosin heavy chain Protease Surimi-based product Thermally induced gel Washing White croaker 



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Copyright information

© Japanese Society of Fisheries Science 2019

Authors and Affiliations

  • Nobuhiko Ueki
    • 1
    Email author
  • Yoko Matsuoka
    • 1
  • Jianrong Wan
    • 1
  • Shugo Watabe
    • 1
    • 2
  1. 1.Fish Protein LaboratorySuzuhiro Kamaboko Honten Co., Ltd.OdawaraJapan
  2. 2.School of Marine BiosciencesKitasato UniversitySagamiharaJapan

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