Geffert, Anton, 1955- Changes in the chemical composition of oak wood due to steaming / Anton Geffert, Eva Výbohová, Jarmila Geffertová. -- Obr., tab. -- Lit. - Monitoring the chemical changes resulting from hydrothermal treatment of English oak (Quercus robur L.) through various steaming modesis presented in the paper. The greatest changes were observedin the polysaccharide content (holocellulose). In the most extreme steaming treatment in mode III (tmax140 °C, total duration for 7.5 h), the decrease in their content was the most dramaticreaching approximately 36%. This decrease is the result of degradation of the most labile hemicelluloses. Only minimal changes in cellulose and lignin content were observed, and several concurrent effects result in theslight increase and decrease in individual modes.Firstly, the content of extractives decreased slightly, but with increasing temperature and extended steaming period a considerable increase in their content occurred. In the initial stages of steaming,new carbonyl and carboxyl groups in carbohydrates are formed by oxidation. Consequently, the deacetylation and degradation of hemicelluloses occurred. In addition, the decrease in the crystallinity of cellulose due to steaming was observed.

In Acta Facultatis Xylologiae Zvolen : vedecký časopis Drevárskej fakulty. -- Zvolen : Technická univerzita vo Zvolene, 2019. -- ISSN 1336-3824. -- Vol. 61, no. 1 (2019), s. 19-29

I. Výbohová, Eva, 1974-
II. Geffertová, Jarmila, 1956-
III. Acta Facultatis Xylologiae Zvolen : vedecký časopis Drevárskej fakulty. -- Vol. 61, no. 1 (2019), s. 19-29

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