Department of Fish Processing Technology, Faculty of Fishery Sciences, West Bengal University of Animal and Fishery Sciences 5, Budherhat Road, Panchasayar P.O., Kolkata, 700 094 West Bengal India.
J Food Sci Technol. 2011 Dec;48(6):699-705. doi: 10.1007/s13197-010-0197-8. Epub 2010 Dec 28.
Effect of chitosan on physicochemical attributes of croaker fish surimi during storage at -20 ± 2 °C for 180 days was evaluated. The quality of croaker surimi added with 1% (w/w) chitosan was examined in terms of muscle protein, thaw drip, gel strength and Ca(2+) ATPase activity comparing with those surimi samples added with 4% sucrose and 4% sorbitol. Surimi without any cryoprotectant was treated as control. Chitosan showed cryoprotective effect similar to commercial cryoprotectants as both of them minimized the negative effects of frozen storage on physico-chemical attributes of myofibrillar proteins. The residual Ca(2+) ATPase activity and gel strength of surimi with chitosan were higher than those of control throughout the storage period. Ca(2+) ATPase activity and gel strength had high positive correlation. It is concluded that chitosan was effective in preservation of croaker muscle protein native structure during 6 months of frozen storage and is comparable to other commercial cryoprotectants.
研究了壳聚糖对-20±2℃下贮藏 180 天的黄花鱼鱼糜理化特性的影响。将添加 1%（w/w）壳聚糖的黄花鱼鱼糜的肌肉蛋白、解冻液滴、凝胶强度和 Ca(2+)ATP 酶活性与添加 4%蔗糖和 4%山梨醇的鱼糜样品进行了比较。未添加任何冷冻保护剂的鱼糜作为对照。壳聚糖表现出与商业冷冻保护剂相似的冷冻保护作用，因为它们都最大限度地减少了冷冻储存对肌原纤维蛋白理化特性的负面影响。在整个储存期间，添加壳聚糖的鱼糜的残留 Ca(2+)ATP 酶活性和凝胶强度均高于对照组。Ca(2+)ATP 酶活性和凝胶强度呈高度正相关。结论是，壳聚糖在 6 个月的冷冻储存期间有效保持了黄花鱼肌肉蛋白的天然结构，与其他商业冷冻保护剂相当。
