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Effects of Microorganism and Pests on Thermal Properties of Grain

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org

Citation:  Paper number  131621316,  2013 Kansas City, Missouri, July 21 - July 24, 2013. (doi: 10.13031/aim.20131621316) @2013
Authors:   Jun Yin, Zhongjie Zhang, Wenfu Wu, Tipeng Wang, Zidan Wu, Zhihuai Mao
Keywords:   Thermal properties, Grain, Store

Abstract. Temperature and moisture migration of bulk grain during store could be impacted by microorganism or pests due to thermal properties of the grain modified. In this paper, thermal properties including specific heat and thermal conductivity of perfect and infected wheat by microorganism and stored grain pests were studied by experiments. The results indicated that the effects of microorganism on the specific heat of wheat were more remarkable than that of pest, when the infection time lowed 45d. When the infection time by pest was over 45d, the value of specific heat was lower but the growth rate increased rapidly. Due to the effects of microorganism and pest, thermal conductivity was low. The changes of the chemical component and structure of wheat could be the main reasons of the changes of thermal properties.

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