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Dielectric properties of deformed early potatoes

Author

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  • J. Blahovec

    (Faculty of Engineering, Czech University of Life Sciences in Prague, Prague, Czech Republic)

Abstract

The permittivity of potato tissue was studied during uniaxial compression of cylindrical specimens prepared from two early varieties. Both the real and the imaginary permitivity components were determined repeatedly during the loading and unloading tests. The analysis of the results obtained shows that small differences exist between the permittivity of the late and early potato varieties. The differences are concentrated mainly at frequencies higher than 1 kHz with a maximum between 10 and 100 kHz. The effect of deformation is concentrated into frequencies between 1 and 100 kHz. The effect of deformation on the permittivity values can be divided into reversible and irreversible parts. The results obtained in the loading/unloading tests give some more information on the proportion of both parts.

Suggested Citation

  • J. Blahovec, 2008. "Dielectric properties of deformed early potatoes," Research in Agricultural Engineering, Czech Academy of Agricultural Sciences, vol. 54(2), pages 113-122.
    • Handle: RePEc:caa:jnlrae:v:54:y:2008:i:2:id:3104-rae
    DOI: 10.17221/3104-RAE
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    References listed on IDEAS

    as
    1. J. Sobotka & J. Krejčí & J. Blahovec, 2007. "Equipment for the determination of dielectric properties of vegetable tissue during its mechanical loading," Research in Agricultural Engineering, Czech Academy of Agricultural Sciences, vol. 53(4), pages 143-148.
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    Cited by:

    1. J. Blahovec & A. Yurov, 2010. "The influence of conductivity measurement on mechanical properties of potato tubers - Short communication," Research in Agricultural Engineering, Czech Academy of Agricultural Sciences, vol. 56(1), pages 41-46.

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    1. J. Blahovec & A. Yurov, 2010. "The influence of conductivity measurement on mechanical properties of potato tubers - Short communication," Research in Agricultural Engineering, Czech Academy of Agricultural Sciences, vol. 56(1), pages 41-46.

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