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DIELECTRIC PROPERTIES of RICE BRAN
Author(s) -
SREENARAYANAN V. V.,
CHATTOPADHYAY P. K.,
RAO K. V.
Publication year - 1986
Publication title -
journal of food process engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.507
H-Index - 45
eISSN - 1745-4530
pISSN - 0145-8876
DOI - 10.1111/j.1745-4530.1986.tb00114.x
Subject(s) - dielectric , dissipation factor , loss factor , water content , dielectric loss , materials science , bran , conductivity , moisture , analytical chemistry (journal) , dielectric spectroscopy , chemistry , composite material , chromatography , optoelectronics , electrode , organic chemistry , raw material , electrochemistry , engineering , geotechnical engineering
The dielectric properties of rice bran have been of interest because of their correlation with moisture content and because to a large extent they determine the absorption of energy in dielectric heating applications. the dielectric properties, namely, dielectric constant, loss tangent, dielectric loss factor and a.c. conductivity of rice bran were measured experimentally at a frequency of 13.56 MHz by a resonance method using a Q‐meter along with a coaxial, cylindrical sample holder. In order to study the effects of various factors, namely, the moisture content, temperature and bulk density of rice bran, the experiments were designed and performed based on Response Surface Methodology. the dielectric constant, dielectric loss factor and a.c. conductivity were found to have positive nonlinear relationships, while the loss tangent had a positive linear relationship within the ranges of factors studied, namely 3.95 to 14.05% (w.b.) moisture content, 26.5 to 53.5°C temperature, and 299.5 to 400.5 kg/m 3 bulk density.