| 摘要: |
| 为探明化学型时间温度指示器(TTI)应用于鲜食葡萄采后品质变化的监测效果,对不同温度贮藏条件下鲜食葡萄理化指标,以及不同激活时间(2和4s)的TTI总色差变化进行研究。结果表明:1)鲜食葡萄的硬度变化符合一级反应动力学方程,反应活化能为63.54 kJ/mol;2)激活时间为2和4s时TTI的反应活化能分别为73.96和69.14 kJ/mol;3)激活时间为4s时,TTI与葡萄的反应活化能差值<20 kJ/mol,且TTI预测的鲜食葡萄品质变化值与实测值误差(＜15%)较小。TTI对鲜食葡萄的品质变化的监测效果良好,该类型时间温度指示器能够有效监测葡萄品质变化。 |
| 关键词: 鲜食葡萄 时间温度指示器 反应活化能 硬度 品质 |
| DOI：10.11841/j.issn.1007-4333.2013.06.028 |
| 投稿时间：2013-03-15 |
| 基金项目:教育部新世纪优秀人才计划项目(NCET-11-0491) |
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| Applicability of a chemical time temperature indicatoras a quality indicator for table grape |
|
FU Ze-tian1,2, YAO Meng-meng3, MA Chang-yang3, QI Lin1,2, ZHANG Xiao-shuan3
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| (1.College of Engineering, China Agricultural University;2.Beijing 100083, China;3.College of Information and Electrical Engineering, China Agricultural University, Beijing 100083, China) |
| Abstract: |
| To investigate the effect of a chemical time temperature indicator(TTI) as a quality indicator for table grape,physicoche-mical index variations of table grape and the color change of TTI through different charging times(2 and 4 seconds) were carried out at different constant temperatures(0,5,10,20,25,30℃).It was identified that the overall color change of TTI was correlated well with the change of the grape quality at above mentioned temperatures when the charging time of TTI was set as 4 seconds.Furthermore,the effect of application for TTI was validated under non-isothermal conditions.The results showed that:1) The firmness change of table grape followed the first-order kinetic reaction equation,and the activation energy was 63.54 kJ/mol;2) The activation energies were 73.96 kJ/mol and 69.14 kJ/mol when charging times of TTI were set as 2 and 4 seconds,respectively;3) The difference between the activation energy values of the TTI and the activation energy value of grape quality losses were less than 20 kJ/mol,and the error(<15%) of the TTI prediction was proved acceptable.Therefore the chemical TTI could be considered as a good candidate to monitor grape quality losses. |
| Key words: table grape time temperature indicator activation energy firmness quality |
