20.500.12556/RUL-148000 Analysis of the natural aging of silver fir (Abies alba Mill.) structural timber using dendrochronological, colorimetric, microscopic and FTIR techniques Timber, as a building material, is subject to structural changes in the used interior, which result from the influence of various local environmental conditions and their changes during the service life. Samples of naturally aged historic silver fir (Abies alba Mill.) wood were taken from the roof of St. Barbara Church (Ravnik above Hotedršica, Slovenia). The slices of historic wood were dendrochronologically dated and analyzed by CIELab color determination, light microscopic analysis and IR spectroscopy. Our results showed that the interior of the 18th-century fir structural timber had lower color lightness (L*) and intensity (b*), particularly in the latewood. The partial increase in lignin and decrease in hemicelluloses relative to cellulose content, associated with an increased degree of crystallinity of cellulose, was confirmed by epifluorescence and polarized light microscopy combined with FTIR spectroscopy. wood structural timber aging color dendrochronology microscopy FTIR spectroscopy les konstrukcijski les staranje barva dendrokronologija mikroskopija FTIR spektroskopija true false true Angleški jezik Slovenski jezik Članek v reviji 2023-07-17 13:59:27 2023-07-17 13:59:28 2023-07-18 03:31:42 0000-00-00 00:00:00 2023 0 0 13 str. iss. 7 Vol. 14 2023 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 2023-07-02 630*8 1999-4907 10.3390/f14071363 158131971 RAZ_Dremelj_Matjaz_2023.pdf RAZ_Dremelj_Matjaz_2023.pdf 1 CCA23C5612902AA3C38D79EC5477DD1E a6ba4928551d8cf8c53d04611340b08b011ff63edd07f54d9c0b2eb8fa90ad8f bfa71b34-249a-11ee-aeaf-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=171914 https://www.mdpi.com/1999-4907/14/7/1363 1 66435ec1-2499-11ee-aeaf-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=171911 Biotehniška fakulteta 0 0 0