{"id":2493,"date":"2021-08-09T13:48:39","date_gmt":"2021-08-09T11:48:39","guid":{"rendered":"http:\/\/www.woodresearch.sk\/cms\/?p=2493"},"modified":"2021-08-09T15:48:39","modified_gmt":"2021-08-09T13:48:39","slug":"study-of-the-discoloration-behaviour-of-teak-wood-tectona-grandis-linn-fil-caused-by-simulated-sunlight","status":"publish","type":"post","link":"https:\/\/www.woodresearch.sk\/cms\/study-of-the-discoloration-behaviour-of-teak-wood-tectona-grandis-linn-fil-caused-by-simulated-sunlight\/","title":{"rendered":"Study of the discoloration behaviour of teak wood (Tectona grandis Linn. fil.) caused by simulated sunlight"},"content":{"rendered":"\n<div class=\"wp-block-pdf-viewer-block-standard\" style=\"text-align:left\"><div class=\"uploaded-pdf\"><a href=\"https:\/\/www.woodresearch.sk\/cms\/wp-content\/uploads\/2021\/08\/Study-of-the-discoloration-behaviour-of-teak-wood-Tectona-grandis-Linn.-fil.-caused.pdf\" data-width=\"\" data-height=\"\"><\/a><\/div><\/div>\n","protected":false},"excerpt":{"rendered":"<p>To investigate the discoloration behaviour of teak (Tectona grandis Linn. fil.) during irradiation, teak veneer specimens were exposed to xenon lamp light simulating sunlight for 80 h and subsequently analysed with a colorimeter. The colour changes were explained by recording Fourier transform infrared (FTIR) and gas chromatography-mass spectrometry (GC-MS) spectra at different exposure times. Forty hours of simulated irradiation marked a key point in the colorimetric analysis. During irradiation of 40 h, the increase in the CIELAB parameters \u2206a* and \u2206b* originated from the generation of carbonyl derivatives that were determined by FTIR analysis. Besides that, by combining GC-MS and microscopic analyses, the decrease in \u2206L* in the first 20 h resulted from extractives migrating from the interior to the surface, and that the subsequent increase in \u2206L* mainly arose from volatilization of the extractives. Additionally, the decrease in \u2206b* after another 40 h of irradiation was mainly due to decreasing volatile extractive contents. Our conclusion reveals the causes of photo-induced discoloration in teak.<\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[394],"tags":[1187,178,1402,1401],"release_year":[],"ppma_author":[981,982,983,984,985,991],"class_list":["post-2493","post","type-post","status-publish","format-standard","hentry","category-wood-research-volume-64-number-4-2019","tag-discoloration","tag-ftir","tag-gc-ms","tag-teak-wood-tectona-grandis-linn-fil"],"featured_image_src":null,"author_info":{"display_name":"Maro\u0161 Kov\u00e1\u010d","author_link":"https:\/\/www.woodresearch.sk\/cms\/author\/kovacvupc-sk\/"},"authors":[{"term_id":981,"user_id":0,"is_guest":1,"slug":"xia-lei","display_name":"Xia Lei","avatar_url":"https:\/\/secure.gravatar.com\/avatar\/?s=96&d=mm&r=g","0":null,"1":"","2":"","3":"","4":"","5":"","6":"","7":"","8":""},{"term_id":982,"user_id":0,"is_guest":1,"slug":"yuanbo-wu","display_name":"Yuanbo Wu","avatar_url":"https:\/\/secure.gravatar.com\/avatar\/?s=96&d=mm&r=g","0":null,"1":"","2":"","3":"","4":"","5":"","6":"","7":"","8":""},{"term_id":983,"user_id":0,"is_guest":1,"slug":"hongchang-l","display_name":"Hongchang L.","avatar_url":"https:\/\/secure.gravatar.com\/avatar\/?s=96&d=mm&r=g","0":null,"1":"","2":"","3":"","4":"","5":"","6":"","7":"","8":""},{"term_id":984,"user_id":0,"is_guest":1,"slug":"xin-guo","display_name":"Xin Guo","avatar_url":"https:\/\/secure.gravatar.com\/avatar\/?s=96&d=mm&r=g","0":null,"1":"","2":"","3":"","4":"","5":"","6":"","7":"","8":""},{"term_id":985,"user_id":0,"is_guest":1,"slug":"ruizhi-wen","display_name":"Ruizhi Wen","avatar_url":"https:\/\/secure.gravatar.com\/avatar\/?s=96&d=mm&r=g","0":null,"1":"","2":"","3":"","4":"","5":"","6":"","7":"","8":""},{"term_id":991,"user_id":0,"is_guest":1,"slug":"li-hui","display_name":"Li Hui","avatar_url":"https:\/\/secure.gravatar.com\/avatar\/?s=96&d=mm&r=g","0":null,"1":"","2":"","3":"","4":"","5":"","6":"","7":"","8":""}],"_links":{"self":[{"href":"https:\/\/www.woodresearch.sk\/cms\/wp-json\/wp\/v2\/posts\/2493","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.woodresearch.sk\/cms\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.woodresearch.sk\/cms\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.woodresearch.sk\/cms\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/www.woodresearch.sk\/cms\/wp-json\/wp\/v2\/comments?post=2493"}],"version-history":[{"count":1,"href":"https:\/\/www.woodresearch.sk\/cms\/wp-json\/wp\/v2\/posts\/2493\/revisions"}],"predecessor-version":[{"id":2495,"href":"https:\/\/www.woodresearch.sk\/cms\/wp-json\/wp\/v2\/posts\/2493\/revisions\/2495"}],"wp:attachment":[{"href":"https:\/\/www.woodresearch.sk\/cms\/wp-json\/wp\/v2\/media?parent=2493"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.woodresearch.sk\/cms\/wp-json\/wp\/v2\/categories?post=2493"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.woodresearch.sk\/cms\/wp-json\/wp\/v2\/tags?post=2493"},{"taxonomy":"release_year","embeddable":true,"href":"https:\/\/www.woodresearch.sk\/cms\/wp-json\/wp\/v2\/release_year?post=2493"},{"taxonomy":"author","embeddable":true,"href":"https:\/\/www.woodresearch.sk\/cms\/wp-json\/wp\/v2\/ppma_author?post=2493"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}