Geffertová, Jarmila, 1956- The effect of UV irradiation on the colour change of the spruce wood / Jarmila Geffertová, Anton Geffert, Eva Výbohová. -- Obr., tab. -- Lit. - The effect of UV irradiation on the colour changes o f the surface of spruce wood was evaluated in relation to the chemical changes of the main wood components. The colour changes were carried out by measuring CIELab characteristics (L*, a*, b* and D E*). ATR - FTIR spectroscopy was used t o study chemical changes caused by irradiations. UV irradiation resulted in rapid colour changes o f the surface of spruce wood that are mostly related to lignin photodegradation and increased content of new chromophoric groups . FTIR analysis confirms the wood sensitivity to UV irradiation. In consequence of UV irradiation the characteristic bands of lignin decreased significantly . The intensit y of the bands associated mainly with carbohydrates is not significantly affected by UV irradiation. A combined analysis of FTIR ratio with colour changes showed an i ncreasing trend of b* coordinate, indicating by yellowing. The yellowness increased while the relative ratio lignin/carbohydrates decreased and the relative ratio carbonyl/carbohydrates increased.

In Acta Facultatis Xylologiae Zvolen : vedecký časopis Drevárskej fakulty. -- Zvolen : Technická univerzita vo Zvolene, 2018. -- ISSN 1336-3824. -- Vol. 60, no. 1 (2018), s. 41-50

I. Geffert, Anton, 1955-
II. Výbohová, Eva, 1974-
III. Acta Facultatis Xylologiae Zvolen : vedecký časopis Drevárskej fakulty. -- Vol. 60, no. 1 (2018), s. 41-50

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