不同贮藏条件下武定鸡肌肉肌苷酸及相关核苷酸含量的变化研究

Research on the Changes of Inosinic Acid and its Related Nucleotides Contents in Wuding Chicken Muscle under Different Storage Conditions

实验对150日龄武定母鸡胸肌在不同贮藏温度和时间对其肌苷酸及相关核苷酸的含量影响进行分析,结果表明:18℃贮藏条件下,IMP含量在宰后4 h达到最高值2.00 mg/g,自8 h开始含量显著下降(P<0.05);IMP前体物含量在2 h达到最高测定值1.46mg/g,之后逐渐下降;IMP降解物含量随时间延长逐渐升高;ATP总代谢物含量在4 h含量达到最高值5.71 mg/g,之后逐渐下降;K值随时间延长而增大。4℃贮藏条件下,IMP含量随时间延长呈先升后降规律,24 h含量达到最高1.46 mg/g;IMP前体物含量也存在类似的变化规律,24 h含量达到最高0.91 mg/g,自第3 d开始显著下降(P<0.05);IMP降解物、ATP总代谢物和K值随时间的延长而增加。武定鸡肌肉在相同贮藏温度下,贮藏时间越长,肌苷酸含量越低;贮藏温度越低,肌苷酸降解越缓慢,ATP的整体代谢过程持续时间越长。

The chest muscles of 10 Wuding hens of 150-day-age was selected and was stored at different temperature.The contents of IMP and its related nucleotides at different storage time were determined. The results showed that the contents of IMP reached the highest value 2.002 mg/g after slaughtered 4 h at 18 ℃, and then the contents were significantly decreased after slaughtered for 8 h （P〈0.05）. The contents of IMP precursors reached the highest value at 2 h （1.46 mg/g） and then decreased gradually. The contents of the IMP degradation products gradually increased with the increase of time. The total contents of the ATP metabolites reached the highest value （5.71 mg/g） at 4 h and then decreased gradually. The K value increased with the increase of time. When the storage temperature was 4 ~C, the contents of IMP first increased and then drop with the time extended and the highest measured value 1.46 mg/g reached after saved 24h. The contents of IMP precursors also had a similar variation rule, and the contents reached the highest value （0.91 mg/g） after 24 h. The contents significantly decreased after the 3%th day （P〈0.05）.The contents of IMP degradation products, the total ATP metabolites and the K value were gradually increased with the increase of time. When Wuding chicken muscle stored at the same temperature, the longer of the storage lime, the lower of the IMP contents. The lower of the storage temperature, the slower degradation of IMP, and the longer ATP duration of the whole metabolic process.