Physicochemical properties of ambient and cryoground black pepper

Abstract

The physicochemical characteristics (moisture, particle size, bulk density, true density, porosity, angle of repose,
coefficient of friction, color, oil, oleoresin and piperine) of ambient and cryogenically ground black pepper determined
on the basis of particle size (71.04 - 491.90 μm) at both conditions. The bulk and true densities and angle of repose
decreased with the increase of particle size of both conditions and varied from 532.9-419.2 kg/m3, 615.9-563.4
kg/m3and41.8-30.9°, respectively. The porosity has increased from 24.2 to 25.6 percent with the increase of grades.
Oil, oleoresin and piperine has significantly more retained in cryoground samples and varied from 1.2-1.6%, 6.5-
11.9% and 1.8-4.1%, respectively. L values increased for ambient conditions. Values for a and b were decreased with
increase of grades at both conditions and varied from 15.96-44.15, 4.62-3.59 and 19.29-12.93, respectively. The
results showed that moisture content had no significant effects on grades but other properties had highly significant.