title: Effect of slurry ice on the functional properties of proteins related to quality loss during skipjack tuna (Katsuwonus pelamis) chilled storage.
abstract: The effect of slurry ice on the quality of Skipjack tuna (Katsuwonus pelamis) during chilling storage was investigated and compared to flake ice. Slurry ice-treated samples showed significantly higher springiness and chewiness variables than the blank and flake ice-treated samples (P < 0.05). The growth of microorganisms in tuna muscle treated with slurry ice was also down significantly (P < 0.05), and the total aerobic counts didn't reach higher scores than 5.0 log CFU/g during the whole chilling storage. Additionally, the myofibrillar protein, Ca(2+)-ATPase activity, and total sulfydryl (SH) content in muscle treated with slurry ice were all significantly higher than the blank and flake-iced samples (P < 0.05). This was probably due to the faster cooling, subzero final-temperature, and larger heat exchange derived from slurry ice. Standard error of mean and sodium dodecyl sulfate-polyacrylamide gel electrophoresis results also confirmed that slurry ice treatment could effectively retard the degradation of myofibrillar proteins and showed a positive effect on the stability of tissue structures.
authors: Zhejiang Provincial Key Laboratory of Health Risk Factors for Seafood, College of Food and Pharmacy, Zhejiang Ocean Univ, Zhoushan, Zhejiang province, 316000, China.
authors: Bin
authors: B
authors: Zhang
authors: Shang-gui
authors: SG
authors: Deng
authors: Meng
authors: M
authors: Gao
authors: Jing
authors: J
authors: Chen
mesh_terms: D000818:Animals; D000252:Calcium-Transporting ATPases / Q000378:metabolism; D003080:Cold Temperature; D004591:Electrophoresis, Polyacrylamide Gel; D005519:Food Preservation / Q000379:methods*; D061353:Food Storage / Q000379:methods*; D006358:Hot Temperature; D007053:Ice; D009124:Muscle Proteins / Q000378:metabolism*; D017747:Seafood / Q000032:analysis*; D014413:Tuna
chemical_list: D007053:Ice; D009124:Muscle Proteins; D000252:Calcium-Transporting ATPases
keywords: Ca2+‐ATPase; SDS‐PAGE; SEM; Skipjack tuna; myofibrillar protein; slurry ice; texture; total SH