DENSITY DEPENDENCE OF THE DIELECTRIC PROPERTIES OF WHEAT AND WHOLE-WHEAT FLOUR.

Abstract

The dielectric properties of hard red winter wheat and of whole-wheat flour milled from the same wheat were measured at 11. 67 GHz over a wide range of bulk densities and over a range of moisture contents from 8. 5 to 14. 7%, wet basis. The square root and cube root of the dielectric constant and also a function of the dielectric loss factor were found to be linear functions of the density of the air-particle mixtures. Dielectric properties of the wheat kernel were calculated from the linear relationships and presented as functions of moisture content.