知识与财富的链接
采用3种常用保鲜膜对巨峰葡萄进行气调包装,放于-0.3℃的冰温保鲜库中贮藏,分别在0、5、10、15、20、25、30 d利用质构仪质地多面分析(TPA)法测定葡萄果肉,得到葡萄贮藏期间果肉质地参数变化规律.结果表明:TPA测试反映了3种保鲜膜内的葡萄果内各项质地参数变化规律总体均呈现下降趋势;果肉硬度与黏着性、咀嚼性呈较好的正相关性,而与凝聚性呈负相关;果肉咀嚼性与硬度、黏着性、弹性呈较好的正相关性;果内弹性与凝聚性、咀嚼性、回复性呈较好的正相关性,而回复性与弹性、凝聚性以外的质地参数相关性较差;葡萄好果率与贮藏时间在一定范围内呈良好线性关系,提出一个经验公式将好果率与果肉硬度进行关联.
The Kyoho grape packed in three common preservation films was stored at controlled freezing point-0.3 ℃.The time course of grape berry texture properties during storage was detected by using texture profile analysis at 0,5,10,15,20,25,30 days intervals.It was found that:1)the trend of all the texture parameters of the grape berry in three common preservation films decreased;2)The hardness of grape berry had good positive correlations with adhesiveness and chewiness,but exhibited negative correlation with cohesiveness;3)Chewiness of grape berry had good positive correlations with hardness,adhesiveness,springiness and springiness of grape berry also had good positive correlations with cohesiveness,chewiness,resilience;(4)Resilience had bad correlations with other texture parameters excluding springiness and cohesiveness;(5)good fruit rate linearly decreased with the storage time.Based on the above results,good fruit rate could be used to construct regression model to predict the hardness of Kyoho grape berry.Then a simple evaluation method could be provided for Kyoho grape berry during storage by using the regression model.
