2.3 Sieve Analysis
Ground coriander seed powder obtained as per the procedure described above was separated into different particle size fractions using a set of sieves in a laboratory sieve shaker (M=s Muhlenbau, Reinbek, Germany). The set of standard sieves (10–2800 mm) was arranged serially in a stack with smallest mesh screen at bottom and the largest at the top. About 250 g of coriander seed powder was loaded on the top sieve and the stack was shaken for 20 min. The fractions retained on each screen were removed and weighed, and the weight fraction to total feed was determined. Size reduction ratio defined as the ratio of initial weight mean diameter of the feed to final weight mean diameter of the product after grinding was also calculated.