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vol. 4, nr. 1 (2004)
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Physical results of barley grain moisture treatment
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Wanda Woźniak
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Institute of Agrophysics, Polish Academy of Sciences, ul. Doświadczalna 4, 20-290 Lublin |
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vol. 4 (2004), nr. 1,
pp. 235-242
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abstract:
The naked barley grain cv. Rastik, with an initial moisture content of 10%, was wetted during 1, 3, 6 and 9 hours and then dried in room conditions to the initial moisture content. Inner cracks in grain, caused by those processes, were detected using soft X-ray technique. The physical condition of the endosperm was described by the number of cracks. Barrel-shaped core samples, cut from selected kernels, were than subjected to uniaxial compression tests to determine the compressive strength (smax), modulus of elasticity (E), strain (emax) and specific work energy (wmax). The naked barley cv. Rastik is characterized by very low resistance to endosperm cracking. The average number of cracks for control sample amounted to 13.6 and grew with moistening time – up to 3 hours. Moistening time longer than 3 h decreased the compression strength and elasticity modulus of grain. Similar changes were observed in grain strain and specific work energy caused by earlier moistening. After a significant increase – till the ninth hour of moistening, a drop of these values were observed. No significant correlation was noted between these properties and numbers of inner cracks.
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keywords:
barley kernels, X-ray, inner cracks, mechanical properties
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original in:
Polish
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