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Quality Changes of Pear during Shelf-Life

机译：保质期内梨的品质变化

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The aims of our research work were the investigation of postharvest changes of pear samples (Pyrus communis cv. Bosc kobak) during combined cold storage and shelf-life (storage at room temperature), the determination of quality changes by mainly non-destructive methods, the modeling of the changes of the non-destructive parameters (acoustic, impact stiffness coefficient, chlorophyll fluorescence parameters [Fi/Fm, Fm/Fo]), and multivariate statistical analysis of the measured and predicted data basedon the data of the non-destructive texture analysis (acoustic and impact methods), chlorophyll fluorescence analysis and laser scattering measurement. Storage Time Equivalent Value (STEV) was calculated and introduced based on mass-loss analysis. The changes of the non-destructive parameters were analyzed vs. this virtual storage time (STEV). The changes of acoustic, impact stiffness coefficient and chlorophyll fluorescence parameters can be predicted by exponential function. The predicted time constants of the parameters were 21.0, 45.8, 47.1, 83.4, acoustic, impact stiffness coefficient, Fm/Fo, Ft/Fm, respectively. The lower the time constant, the quicker is the change of the given parameter during storage, the higher is its sensitivity. By this point of view, the percentage mass loss related sensitivity to the characterization of textural changes, the predicted acoustic stiffness coefficient was found to be more sensitive than the impact stiffness coefficient. The Fm/Fo value characterized more sensibly the changes of the chlorophyll fluorescence than in the literature commonly used F,/Fm. The non-contact laser scattering method based significant PLS models were constructed to predict the quality related pear characteristics (mechanical properties, chlorophyll fluorescence parameters).
机译：我们研究工作的目的是调查梨样​​品（Pyrus communis cv。Bosc kobak）在冷藏和保质期（在室温下保存）期间的采后变化，主要通过非破坏性方法确定质量变化，对非破坏性参数（声学，冲击刚度系数，叶绿素荧光参数[Fi / Fm，Fm / Fo]）的变化进行建模，并基于非破坏性数据对测量和预测数据进行多元统计分析纹理分析（声学和冲击方法），叶绿素荧光分析和激光散射测量。根据质量损失分析计算并引入了存储时间等效值（STEV）。分析了非破坏性参数相对于此虚拟存储时间（STEV）的变化。声学，冲击刚度系数和叶绿素荧光参数的变化可以通过指数函数预测。参数的预计时间常数分别为21.0、45.8、47.1、83.4，声学，冲击刚度系数，Fm / Fo，Ft / Fm。时间常数越低，存储期间给定参数的更改越快，其灵敏度越高。从这个角度来看，质量损失百分比与纹理变化特征的敏感性相关，发现预测的声学刚度系数比冲击刚度系数更敏感。与文献中常用的F / Fm相比，Fm / Fo值更合理地表征了叶绿素荧光的变化。构建了基于非接触激光散射法的重要PLS模型，以预测与梨品质相关的特性（机械性能，叶绿素荧光参数）。

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