dc.contributor | Universidade Estadual Paulista (Unesp) | |
dc.date.accessioned | 2014-05-27T11:20:37Z | |
dc.date.available | 2014-05-27T11:20:37Z | |
dc.date.created | 2014-05-27T11:20:37Z | |
dc.date.issued | 2003-03-01 | |
dc.identifier | Applied Biochemistry and Biotechnology - Part A Enzyme Engineering and Biotechnology, v. 106, n. 1-3, p. 393-402, 2003. | |
dc.identifier | 0273-2289 | |
dc.identifier | http://hdl.handle.net/11449/67208 | |
dc.identifier | 10.1385/ABAB:106:1-3:393 | |
dc.identifier | WOS:000182725000036 | |
dc.identifier | 2-s2.0-0038071730 | |
dc.identifier | 7091241742851920 | |
dc.identifier | 9424175688206545 | |
dc.description.abstract | The alkalophilic Bacillus circulans D1 was isolated from decayed wood. It produced high levels of extracellular cellulase-free xylanase. The enzyme was thermally stable up to 60°C, with an optimal hydrolysis temperature of 70°C. It was stable over a wide pH range (5.5-10.5), with an optimum pH at 5.5 and 80% of its activity at pH 9.0. This cellulase-free xylanase preparation was used to biobleach kraft pulp. Enzymatic treatment of kraft pulp decreased chlorine dioxide use by 23 and 37% to obtain the same kappa number (κ number) and brightness, respectively. Separation on Sephadex G-50 isolated three fractions with xylanase activity with distinct molecular weights. | |
dc.language | eng | |
dc.relation | Applied Biochemistry and Biotechnology - Part A Enzyme Engineering and Biotechnology | |
dc.relation | 1.797 | |
dc.relation | 0,571 | |
dc.rights | Acesso aberto | |
dc.source | Scopus | |
dc.subject | Bacillus circulans | |
dc.subject | Biobleaching | |
dc.subject | Kraft pulp | |
dc.subject | Thermophilic | |
dc.subject | Xylanase | |
dc.subject | cellulase | |
dc.subject | chlorine dioxide | |
dc.subject | enzyme | |
dc.subject | sephadex | |
dc.subject | xylan endo 1,3 beta xylosidase | |
dc.subject | bleaching | |
dc.subject | brightness | |
dc.subject | conference paper | |
dc.subject | enzyme activity | |
dc.subject | enzyme isolation | |
dc.subject | enzyme stability | |
dc.subject | Eucalyptus | |
dc.subject | extracellular space | |
dc.subject | hydrolysis | |
dc.subject | isolation procedure | |
dc.subject | molecular weight | |
dc.subject | nonhuman | |
dc.subject | pH | |
dc.subject | pulp processing | |
dc.subject | separation technique | |
dc.subject | temperature | |
dc.subject | thermostability | |
dc.subject | wood | |
dc.subject | Bacillus | |
dc.subject | Biotechnology | |
dc.subject | Cellulase | |
dc.subject | Endo-1,4-beta Xylanases | |
dc.subject | Enzyme Stability | |
dc.subject | Hydrogen-Ion Concentration | |
dc.subject | Hydrolysis | |
dc.subject | Kinetics | |
dc.subject | Thermodynamics | |
dc.subject | Xylans | |
dc.subject | Xylosidases | |
dc.title | Effect of Bacillus circulans D1 thermostable xylanase on biobleaching of eucalyptus kraft pulp | |
dc.type | Actas de congresos | |