Cellulose and Cellulose Derivatives: Cellucon '93 by John F Kennedy, Glyn O Phillips, Peter A Williams, J.L.

By John F Kennedy, Glyn O Phillips, Peter A Williams, J.L. Piculell

The lawsuits of the Cellucon belief convention held in Lund, Sweden, in 1993. the newest clinical advances are lined, environmental issues and the ensuing fiscal expenditures are handled. The papers have unusually broad functions throughout a couple of industries, together with foodstuff processing, prescription drugs, chemical processing, civil engineering and composite fabrics creation.

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Cellulose and Cellulose Derivatives: Cellucon '93 Proceedings: Physico-Chemical Aspects and Industrial Applications

The lawsuits of the Cellucon belief convention held in Lund, Sweden, in 1993. the most recent medical advances are lined, environmental matters and the ensuing financial expenditures are handled. The papers have strangely huge functions throughout a few industries, together with meals processing, prescription drugs, chemical processing, civil engineering and composite fabrics construction.

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H. Chanzy, M. Paillet, Polymer, 32, 400 (1990). Direct solublc: cellulose of Celsol 35 4. Cellulose'91 Conference, New Orleans, USA, 1991. 5. Polish Pat. Appl. P-289280 (1991). 6. Polish Pat. P-281342 (1989). 7. Polish Pat. P-284488 (1989). 8. Processings of Celsol Seminar, E6dt, Poland, 1992. 5 Hydrolysis of cellulose and cellooligosaccharides catalysed by cellobiohydrolase I1 studied by proton NMR and HPLC A Teleman*, A Valkeajarvi**, A Koivula**, L Ruohonen** and T Drakenberg" - VTT, * Chemical Technology and ** Biotechnical Laboratory, PO Box 1401, FIN-02044 VTT, Finland ABSTRACT Proton NMR spectroscopy and HPLC have been used to investigate the hydrolysis of cellooligosaccharides and cellulose by cellobiohydrolase I1 from Trichoderma reesei.

E. a-face up or down for the glucoside unit in the non-reducing end. The active site has in an X-ray diffraction study5 been shown to consist of a tunnel with at least four subsites. In order for hydrolysis to occur the glycosidic linkage between subsite B and C, where the hydrolysis occurs, has to be positioned correctly. Thus for cellooligosaccharides either a cellobiose or a cellotriose will be cleaved off from the non-reducing end. Table I. Cleavage pattern for the CBH II hydrolysis of the substrates cellotriose to cellohexaose.

The pulp quality was analysed by kappa number (SCAN) and brightness (ISO). Samples for kappa analyses were also taken after enzyme treatment. RESULTS AND DISCUSSION The kappa numbers of the residual pulps after enzyme treatment showed a decrease in the series treated with xylanase and the combinations xylanase-MnP, xylanase-LiP (Fig 1). Delignification with alkaline peroxide for 1 h at 80°C decreased the kappa number most pronounced in samples treated with xylanase, with the combination xylanaseMnP or with laccase-MnP.

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