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An extracellular xylanase was purified from Aspergillus niger DFR-5 up to absolute homogeneity using (NH 4 ) 2 SO 4 fractionation (30–65%), size exclusion (Sephadex G-100) and ion-exchange (DEAE-cellulose) chromatography. The preparation yielded a single peak in RP-HPLC confirming its purity. Molecular mass of xylanase as revealed by gel filtration and SDS-PAGE was ∼32kDa confirming...
The effects of solid substrates, initial moisture content, moistening medium, temperature and incubation time on xylanase production by Aspergillus niger DFR-5 was studied and the highest activity (2596IU/g dry substrate (gds)) was achieved in medium that contained wheat bran (WB) and soybean cake (SBC) at a ratio of 70:30, was moistened to 70% with MSS-2 mineral salt solution, and incubated for 6days...
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