Production and optimization of xylooligosaccharides from corncob by Bacillus aerophilus KGJ2 xylanase and its antioxidant potential

The aim of the present study is to produce xylooligosaccharides (XOS) from corncob xylan. The xylan was extracted from corncob using methods like dilute acid, dilute alkali and sodium hypochlorite treatment. Corncob xylan extracted using alkali was characterized by FT-IR and TG-DSC. The extracted xylan was subjected to enzymatic hydrolysis using Bacillus aerophilus KGJ2 xylanase for XOS production. To increase the yield of XOS, the effects of various process parameters like substrate concentration, reaction time, and enzyme concentration on XOS production were investigated. XOS prepared was characterized by HPTLC. Anti oxidant potential of produced XOS was evaluated and the DPPH assay showed that XOS possessed concentration dependent free radical scavenging activity. (C) 2015 Elsevier B.V. All rights reserved.