Change of Electric Parameters and Physiological Parameters of Kiwi of Storage Period
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    Abstract:

    ‘Qinmei’ kiwifruit was used to investigate the change of electric properties and physiological parameters with the extension of storage time under the condition of storage at 20℃. Complex impedance (Z), parallel equivalent capacitance (Cp) and impedance angle (θ) three electrical parameters and 12 physiological parameters of fruits such as firmness were measured synchronously. The results showed that the Z of Kiwi dropped significantly on the late period of storage, Cp increased significantly on the late period of storage. Firmness and total acid (TA) of fruits were increased and total soluble sugar (TSS) was decreased with the extension of storage time. The reducing of content of starch and cellulose was positively correlated with the declining of fruit firmness.Z can quantify eight physiological parameters such as firmness of fruits, impedance angle (θ) can quantify five physiological parameters in the characteristic frequency of 0.1kHz.Cp can quantify six physiological parameters in the characteristic frequency of 1MHz and 1.58MHz.

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  • Online: January 12,2012
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