caa a22 4500 378867660 CHVBK 20180305123401.0 cr unu---uuuuu 161128e20030820xx s 000 0 eng 10.1515/HF.2003.075 doi (NATIONALLICENCE)gruyter-10.1515/HF.2003.075 Oxidized Derivatives of Lipophilic Extractives Formed during Hardwood Kraft Pulp Bleaching [Elektronische Daten] [C. S. R. Freire, A. J. D. Silvestre, C. Pascoal Neto] The structural changes of E. globulus wood extractives during bleaching with chlorine dioxide (D), oxygen (O), ozone (Z) and hydrogen peroxide (P) were studied. The detailed characterisation of the extractive derivatives detected in the partially bleached D, O, P and Z pulps was achieved by performing reactions of pure reference compounds with the different bleaching agents. The results show that the unsaturated sterols and fatty acids are extensively degraded during chlorine dioxide and ozone bleaching and only partially degraded during oxygen and hydrogen peroxide bleaching. The corresponding saturated extractives as well as the long chain aliphatic alcohols and ω-hydroxyfatty acids were stable during bleaching. The main oxidation products of β-sitosterol and oleic and linoleic acids, including one chlorinated derivative of linoleic acid, were identified here for the first time in E. globulus bleached pulps and bleaching filtrates. Copyright © 2003 by Walter de Gruyter GmbH & Co. KG Timber & wood processing nationallicence Biotechnology nationallicence Materials science nationallicence Freire C. S. R. aut Silvestre A. J. D. aut Neto C. Pascoal aut Holzforschung Walter de Gruyter 57/5(2003-08-20), 503-512 0018-3830 57:5<503 2003 57 hfsg https://doi.org/10.1515/HF.2003.075 text/html Onlinezugriff via DOI 1 research article jats NATIONALLICENCE 856 40 https://doi.org/10.1515/HF.2003.075 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Freire C. S. R. aut NATIONALLICENCE 700 1- Silvestre A. J. D. aut NATIONALLICENCE 700 1- Neto C. Pascoal aut NATIONALLICENCE 773 0- Holzforschung Walter de Gruyter 57/5(2003-08-20), 503-512 0018-3830 57:5<503 2003 57 hfsg CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-gruyter