摘要
研究了在室温(21～22℃)和4℃不同贮藏温度下,屠宰后1～24h之内鸡胸肉肌苷酸(IMP)及其相关物含量的变化规律。结果显示,4℃下放血后24h内IMP及其相关物浓度变化不大;12h后的IMP含量与屠宰后1h相当,24h后仅降低4.9%。室温(21～22℃)下4h后IMP浓度迅速下降,IMP降解产物浓度明显上升;12h后鸡胸肉IMP含量损失16%(P<0.01),24h后损失55%(P<0.01)。经模拟计算,得回归方程y=-0.1282x2+0.4733x+2.0587(R2=0.9542),求得在本试验条件下,室温为21～22℃时,屠宰后110min鸡胸肉IMP含量达到最高峰,其值为2.916mg/g。4℃下4h和8hIMP的含量分别比室温高5.6%(P<0.05)和8.2%(P<0.05),12h和24h分别高19.4%(P<0.01)和105%(P<0.01)。结果表明,鸡肉中生成IMP的反应很快完成,基本不受时间和温度的影响;但贮藏时间和温度对鸡肉IMP的降解速率有显著影响,温度越高,时间越长,IMP含量越低。
Changes of inosinic 5'-Monophosphosphate (IMP) and its relatives in chicken muscle during storage at room temperature (21~22℃) and 4℃ were followed from less than one hour after slaughter through 24 hours post-mortem. The result showed that the content of IMP and its relatives changed little in 24 hours after slaughter during storage at 4℃.The content of IMP after 12 hours was similar to it at one hour post-mortem, the content decreased by only 4.9% after 24 hours storage. During storage at room temperature, the content of IMP declined rapidly and its breakdown products increased significantly after four hours storage, when 16% (P<0.01) and 55% (P<0.01) loss of IMP occurred at 12 and 24 storage hours, respectively. Using the experimental data, a stimulated polynomial regressive equation, y=(-0.1282x^2)+0.4733x+2.0587(R^2=0.9542), was drawn out. It was calculated that the peak content of IMP was 2.916mg/g when storage was over 110 minutes over post-mortem under this experiment condition, according to the equation. The IMP content were 5.6% and 8.2%(P<0.05)higher respectively under 4℃ than those at room temperature storage after four and eight hours, 19.4%(P<0.01)and 105%(P<0.01)higher after 12 and 24 hours storage respectively. The result indicated that the formation of IMP in chicken muscle was completed rapidly after slaughter, but the degradation rate of IMP was obviously affected by storage temperature and time, i.e. the higher the temperature and the longer the time, the content of IMP was lower.
出处
《畜牧兽医学报》
CAS
CSCD
北大核心
2004年第3期276-279,共4页
ACTA VETERINARIA ET ZOOTECHNICA SINICA
基金
国家"863"计划"中国特色优质肉鸡新品系选育与开发"(2001AA243081)资助。
