Abstract
Abstract In this study, some physical properties such as bulk density, true density, porosity and static coefficient of friction in four levels of moisture content (against four structural surfaces) of an Iranian commercial variety of hazelnut (Azarbayejani Hazelnut) and its kernel was determined. Bulk density increased from 409.7 to 491.4 kg m−3 and from 415.4 to 477.9 kg m−3 for whole nut and its kernel respectively. True density increased from 954.8 to 1079.4 kg m−3 for whole nut and from 886.9 to 965.8 kg m−3 for its kernel, porosity decreased from 57.11 to 54.47 kg m−3 and from 53.52 to 52.51 kg m−3 for whole nut and its kernel. The static coefficient of friction of both nuts and kernels on all four test surfaces increased with increasing the moisture content. The average friction coefficient (both nut and kernel) was the highest on MDF and the lowest on galvanized iron sheet.
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