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Two distinct forms of carboxymethylcellulase (CMCases) were produced by Paecilomyces sp. in a medium containing 5% (w/v) rice hull as the carbon source. CMCases I and II were purified 13.2- and 127.3-fold, respectively, by acetone precipitation, ion-exchange chromatography on DEAE-Sephadex A-50 and gel filtration on Sephadex G-200. Both enzymes were optimally active at 60 o C and retained...
One- and two-stage processes to obtain furfural from rice hull were examined. When the reaction was carried out in an autoclave at different liquid/solid ratios and sulphuric acid concentrations, a low production of furfural was observed. Metallic oxides catalysed the conversion and enhanced furfural production. In a two-stage process (pre-hydrolysis and dehydration) the yield was the highest and...
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