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Prediction of apple bruising based on the instantaneous impact shear stress and energy absorbed

Author(s): Yuwana Y. | Duprat F.

Journal: International Agrophysics
ISSN 0236-8722

Volume: 12;
Issue: 2;
Start page: 133;
Date: 1998;
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Keywords: apple | instantaneous impact shear stress | instantaneous energy absorbed | predicted bruise volume | measured bruise volume

Instantaneous impact shear stress together with the instantaneous energy absorbed were used to predict bruise volume in Golden Delicious apple. The prediction produced a linear relation between the predicted bruise volumes and the measured bruise volumes with a factor of proportionality (K) 1.08 and a coefficient of correlation (R) 0.949. Both the instantaneous impact shear stress and energy absorbed decreased during storage of the fruit, but the value of K was relatively constant. The value of K was also relatively constant for the impact with small drop heights, but it slightly increased with the variation of fruit mass.
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