An investigation on minerals, arabinoxylans and other fibres of biofortified hull-less barley fractions obtained by two milling systems

Abstract The aims of the present study were to compare arabinoxylan, glucomannan, arabinogalactan, dietary fibre and mineral contents of fibre rich and enriched-fibre rich fractions (FRF, E-FRF) obtained by two milling systems from biofortified (+) and non-biofortified (−) hull-less barley cultivar, Yalin and determine impact of biofortification (Zn, I, Se). Arabinoxylan contents and recoveries of FRF obtained by roller mill (FRFR) were 6.52% and 6.70%; 82.6% and 83.3% while those of FRF obtained by hammer mill (FRFH) were 7.36% and 7.24%; 73.9% and 73.5% for Yalin (−) and Yalin (+), respectively. Likewise, arabinoxylan contents and recoveries of E-FRFR were 11.91, 11.66%; 70.8% and 67.2% while those of E-FRFH were 11.70%, 12.13%; 61.3% and 64.9% for Yalin (−) and Yalin (+), respectively. Arabinogalactan contents of E-FRFR and E-FRFH were comparable (1.32–1.45%) for both Yalin samples. Their glucomannan contents were higher than arabinogalactan contents (1.79–1.90%). Furthermore, total dietary fibre contents of E-FRFR and E-FRFH were determined as 2.4–2.7 fold higher than their whole grain Yalin samples. Zinc, iodine, selenium contents (22 mg kg−1, 16 μg kg−1, 122 μg kg−1) of the whole grain of Yalin (−) increased through biofortification and milling and reached to 59 mg kg−1, 383 μg kg−1, 345 μg kg−1 in E-FRFR of Yalin (+), respectively.