Haşhaş tohumunun dielektrik özellikleri

Abstract

The dielectric properties of poppy seed were determined over the frequency range from 50 kHz to 10 MHz at moisture content in a range of 6.12-22.47% dry basis (d.b.) with bulk density changing between 541.99 and 626.37 kg/m3 using parallel-plate capacitor sample holder. The dielectric constant, loss factor, loss tangent and the a.c. conductivity was greatly influenced by the moisture content, bulk density and frequency. The moisture content was the most significant factor affecting the dielectric properties of poppy seed. The dielectric constant and loss factor increased with an increase in moisture content and bulk density and with a decrease in frequency. The dependence of the loss factor and loss tangent on frequency was less regular than that of the dielectric constant. The a.c. conductivity was observed to increase more rapidly with increasing moisture contents than with increasing frequencies. Also, two models have been shown to estimate adequately the dielectric constant and loss factor of poppy seed within the investigated moisture content, bulk density and frequency range.