Table 1
Percentage decrease in concentration of mineral elements caused by polishing of
brown rice in an industrial pressure mill (friction polishing) or in a laboratory
shearing-type mill in which rice grain were shaken with aluminium oxide (abrasive
polishing). The two techniques resulted in losses of about 9% of grain dry matter by
friction polishing and 3e5% during abrasive polishing. Data are mean values for 13
different genotypes from the International Rice Research Institute, 9 classified as
difficult to polish and 4 as easy to polish (Table S1). Values within same element
followed by different letters differ significantly (P ¼ 0.05).