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Effect of species, chemical composition and measurement frequency on conductance properties of cereal grains

 

 

 

Key words: 

cereal grains, chemical composition, electrical properties, correlations

Summary

This manuscript presents results of a study aimed at determining the conductance properties and proximate chemical composition of the grain of selected cereal species, and to find correlations between these parameters.  Analyses of the effect of the chemical composition of cereal grains on their electric conductivity demonstrated the highest values of impedance and total lipids content in oat Zuch, and the lowest Z value and total lipids content in wheat Muszelka. Opposite relations were observed between admittance values and lipids content in the grain of these cereal species. In turn, the highest values of admittance and starch content were found in wheat Muszelka, and the lowest values of admittance and starch content – in oat Zuch. It indicates that contents of lipids and starch have a key effect upon the electric conductivity of cereal grains. The significant correlations demonstrated between impedance and admittance parameters of cereal grains and their chemical composition (contents of lipids and starch in particular) point to the feasibility of applying the conductance properties for discriminating cereal species and cultivars of the same cereal species, in a frequency range from 100 kHz to  2 MHz.

dr hab. inż. Joanna K. BANACH, prof. UWM prof. dr hab. inż. Katarzyna MAJEWSKA* mgr inż. Aleksandra EJSMONT prof. dr hab. inż. Ryszard ŻYWICA mgr inż. Ewelina GRABOWSKA*

University of Warmia and Mazury in Olsztyn Faculty of Food Science Chair of Commodity Industry, Basics of Techniques and Energy Management  * Chair of Food Plant Chemistry and Processing Plac Cieszyński 1, 10-719 Olsztyn, Poland e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

 

 

 

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