Počet záznamov: 1
The effect of UV irradiation on the colour change of the spruce wood
Názov The effect of UV irradiation on the colour change of the spruce wood Aut.údaje Jarmila Geffertová, Anton Geffert, Eva Výbohová Autor Geffertová Jarmila TUZDFCHTD - Katedra chémie a chemických technológií Spoluautori Geffert Anton TUZDFCHTD - Katedra chémie a chemických technológií Výbohová Eva TUZDFCHTD - Katedra chémie a chemických technológií Zdroj.dok. Acta Facultatis Xylologiae Zvolen : vedecký časopis Drevárskej fakulty. Vol. 60, no. 1 (2018), s. 41-50. - Zvolen : Technická univerzita vo Zvolene, 2018 Poznámky Lit. Jazyk dok. angličtina Krajina Slovenská republika Systematika 674.032.475.5 Heslá smrekové drevo - spruce wood * ožiarenie UV lúčmi - irradiation by UV-light * farebné zmeny - colour changes * spektroskopia ATR - ATR spectroscopy * spektroskopia FT-NIR - FT-NIR spectroscopy * farebný priestor CIE L*a*b* - CIE L*a*b* colour space CIELAB * degradácia lignínu - lignin degradation Anotácia 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. URL https://df.tuzvo.sk/sites/default/files/05-01-18_0.pdf Kategória publikačnej činnosti ADN Báza dát xcla - ČLÁNKY Druh dok. RBX - rozpis článkov z periodík Odkazy PERIODIKÁ-Súborný záznam periodika Zväzky 2018: 1-2 článok
Počet záznamov: 1