Moisture dependent physical properties of hazelnut

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 Iranian 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 47.77 kg m-3 for whole nut and its kernel. The static coefficient of friction of both nuts and kernels on all the four tests increased with increasing moisture content. The highest and lowest static coefficient of friction was seen on MDF and galvanized iron sheet, respectively.