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In the present study, an aqueous two-phase system (ATPS) composed of polyethylene glycol (PEG) and ammonium sulphate ((NH 4 ) 2 SO 4 ) was used to purify a thermostable xylanase produced by the thermophilic fungus Paecilomyces thermophila J18 in solid-state fermentation (SSF). The effects of PEG, (NH 4 ) 2 SO 4 , loading mass and pH on xylanase partition...
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