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Physical Properties of Biofilm Manufactured from Gelatin of Yellowfin Tuna Thunnus albacares Skin Treated with Acetic Acid

아세트산 처리 황다랑어(Thunnus albacares) 껍질 유래 젤라틴으로 제조한 바이오필름의 물리적 특성

  • Kim, Ju-Yeon (Department of Food Science and Technology/Institute of Food Science, Pukyong National University) ;
  • Kim, Do-Hyeong (Department of Food Science and Technology/Institute of Food Science, Pukyong National University) ;
  • Kim, Seon-Bong (Department of Food Science and Technology/Institute of Food Science, Pukyong National University)
  • 김주연 (부경대학교 식품공학과/식품연구소) ;
  • 김도형 (부경대학교 식품공학과/식품연구소) ;
  • 김선봉 (부경대학교 식품공학과/식품연구소)
  • Received : 2011.10.24
  • Accepted : 2011.12.07
  • Published : 2011.12.30

Abstract

The present study examined the physical properties of biofilms manufactured from yellowfin tuna Thunnus albacares skin gelatin with the aim of developing a biofilm from fisheries by-products to replace mammalian sources. The physical properties of biofilms from yellowfin tuna gelatin were compared with those of biofilms from porcine gelatin. The yellowfin tuna gelatin biofilm exhibited higher tensile strength (69.08 MPa) and greater elongation (14.32%) than did porcine gelatin biofilm (50.50 MPa and 10.21%, respectively). The ${\Delta}E$ and YI (yellowness index) Huntercolor values of yellowfin tuna gelatin biofilm were three-fold and 15-fold higher, respectively, than values for porcine gelatin biofilm. The opacity value of yellowfin tuna gelatin biofilm was higher than that of porcine gelatin biofilm. The stability against water of yellowfin tuna gelatin biofilm was lower than that of porcine gelatin biofilm at pH 3 to pH 11. Thermogravimetric analysis (TGA) indicated that the thermal stability of the biofilms was about $270^{\circ}C$ for porcine gelatin biofilm and about $250^{\circ}C$ for yellowfin tuna gelatin biofilm.

Acknowledgement

Supported by : 한국연구재단

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