Influence of Variety,Moisture Content,Kernel Size and Applied Current Frequency on the Electric Properties of Wheat Grain |
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| Authors: | Katarzyna Majewska Joanna K Banach Ryszard ?ywica Ireneusz Bia?obrzewski |
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| Affiliation: | 1. Faculty of Food Science , University of Warmia and Mazury , Olsztyn, Poland kasia@uwm.edu.pl;3. Faculty of Food Science , University of Warmia and Mazury , Olsztyn, Poland;4. Faculty of Engineering , University of Warmia and Mazury , Olsztyn, Poland |
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| Abstract: | The work aimed at determination of electric properties of wheat grain in dependence on its variety, moisture, geometrical features of kernels and applied current frequency. Wheat grain of 4 Polish winter varieties: Korweta, Juma, Mikon and Kobra from harvest 2001 were used as the material for study. Grain was sized into 3 fractions: (1) > 2,8mm, (2) 2,5–2,8mm, and (3) 2,2–2,5mm. Basic geometrical features were determined for not sorted grain (control sample) and its three fractions by the use of digital image analysis. Electric properties of grain (at 11% and 15% moisture content) have been performed with the Hewlett Packard 4263B meter. Measurements of impedance, resistance, admittance, conductance, as well as equivalent parallel capacitance and equivalent series capacitance were made. Obtained results were subjected to statistical analysis with the use of Statistica? programme. Changes in electric properties of grain significantly depended on all of studied factors. Most of all significant correlations appeared between geometrical features and studied electric properties of grain of 15% moisture. Statistical analysis of the results proved significant linear correlations between electric properties of kernels and their length, perimeter and circularity coefficient RC2 at higher measurement frequencies. |
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| Keywords: | Wheat grain Variety Grain moisture content Geometrical features of kernels Digital image analysis Electric properties of grain Current frequency Correlations |
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