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Modeling respiration rates of Ipomoea batatas (sweet potato) under hermetic storage system.
Food Science and Biotechnology ( IF 2.9 ) Pub Date : 2019-08-12 , DOI: 10.1007/s10068-019-00660-2
Seo Hyeon Han 1 , Han Dong Jang 1 , Seung Ju Lee 1
Affiliation  

The sweet potato respiration rate versus gas composition was mathematically modeled, as required to design an effective modified atmosphere packaging (MAP) system. Storage tests of sweet potato were conducted at 15-30 °C. The O2 and CO2 concentrations were measured over time in a closed system. The respiration rate was estimated to be a derivative of the quadratic function of gas concentration over time and decreased with decreasing O2 and increasing CO2. The model of the uncompetitive inhibition enzyme reaction rate fitted well with the experimental results. The temperature dependency of the equation parameters (Vm, Km, and Ki) followed the Arrhenius relationships. The use of the proposed models to simulate the respiration rates as a function of temperature revealed less temperature dependence in low O2 and high CO2 concentrations. This gas composition, more desirable in practice, also agreed with the typical gas composition of MAP.

中文翻译:

在密闭存储系统中模拟番薯番薯(红薯)的呼吸速率。

根据设计有效的气调包装(MAP)系统的要求,对红薯呼吸速率与气体成分的关系进行了数学建模。红薯的贮藏测试在15-30°C下进行。在封闭系统中,随时间测量O2和CO2浓度。估计呼吸速率是气体浓度随时间的二次函数的导数,并且随着O2的减少和CO2的增加而降低。非竞争性抑制酶反应速率模型与实验结果吻合良好。方程参数(Vm,Km和Ki)的温度依赖性遵循Arrhenius关系。使用建议的模型来模拟呼吸速率随温度的变化,表明在低O2和高CO2浓度下温度依赖性较小。
更新日期:2020-01-31
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