Počet záznamov: 1
The effect of UV irradiation on the colour change of the spruce wood
SYS 0095255 LBL 00000naa^^22^^^^^^^^450 005 20180425094030.5 017 70
$a 10.17423/afx.2018.60.1.05 $2 DOI 100 $a 20180425a m y0sloy0103 ba 101 0-
$a eng 102 $a SK 200 1-
$a The effect of UV irradiation on the colour change of the spruce wood $f Jarmila Geffertová, Anton Geffert, Eva Výbohová 215 $c Obr., tab. 320 $a Lit. 330 $a 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. 463 -1
$1 001 sldk_un_cat*0094837 $1 011 $a 1336-3824 $1 200 1 $a Acta Facultatis Xylologiae Zvolen $e vedecký časopis Drevárskej fakulty $v Vol. 60, no. 1 (2018), s. 41-50 $1 210 $a Zvolen $c Technická univerzita vo Zvolene $d 2018 610 1-
$9 sldk_un_auth*h005962 $a smrekové drevo $X spruce wood 610 1-
$9 sldk_un_auth*h017825 $a ožiarenie UV lúčmi $X irradiation by UV-light 610 1-
$9 sldk_un_auth*h027058 $a farebné zmeny $X colour changes 610 1-
$9 sldk_un_auth*h036944 $a spektroskopia ATR $X ATR spectroscopy 610 1-
$9 sldk_un_auth*h017405 $a spektroskopia FT-NIR $X FT-NIR spectroscopy 610 1-
$a farebný priestor CIE L*a*b* $9 sldk_un_auth*0011611 $X CIE L*a*b* colour space 610 1-
$9 sldk_un_auth*h013746 $a degradácia lignínu $X lignin degradation 675 $a 674.032.475.5 $v 2. stred. $z slo 700 -1
$3 sldk_un_auth*p0039105 $a Geffertová $b Jarmila $f 1956- $p TUZDFCHTD $4 070 $T Katedra chémie a chemických technológií 701 -1
$3 sldk_un_auth*p0016647 $a Geffert $b Anton $f 1955- $p TUZDFCHTD $4 070 $T Katedra chémie a chemických technológií 701 -1
$3 sldk_un_auth*p0046221 $a Výbohová $b Eva $f 1974- $p TUZDFCHTD $4 070 $T Katedra chémie a chemických technológií 801 -0
$a SK $b ZV001 $c 20180425 $g AACR2 856 4-
$u https://df.tuzvo.sk/sites/default/files/05-01-18_0.pdf
Počet záznamov: 1