20.500.12556/RUL-164693 Variability of the chemical composition of the wood and bark of two tropical hardwoods from Ghana Variabilnost kemične sestave lesa in skorje dveh tropskih listnatih drevesnih vrst iz Gane The study aims to investigate the chemical properties of the wood and bark of two tropical tree species Nesogordonia papaverifera and Holarrhena floribunda from Ghanatoincrease the efficiency of their utilization. For this purpose, for each of the species five mature trees with similar diameters at breast height were selected. Lignin, cellulose, hemicellulose, and total extractive content were determined from the sapwood and heartwood and bark of stems and branches of both species. The tests were conducted using the Technical Association of the Pulp and Paper Industry (TAPPI) standards. The lignin, cellulose, hemicellulose, and total extractive content vary along different locations in the stems and branches in both species. The sapwood generally had higher cellulose and hemicellulose content, while the heartwood and bark had a greater amount of lignin and extractives. This may affect the lower durability of sapwood. This study shows that heartwood of both Nesogordonia papaverifera and Holarrhena floribunda can be considered a source of value-added compounds. Raziskana je bila kemična zgradba lesa in skorje dveh tropskih listavcev, Nesogordonia papaverifera in Holarrhena floribunda iz Gane za izboljšanje uporabe. V ta namen je bilo za raziskave izbranih pet odraslih dreves vsake vrste. Debla so imela podobne premere na prsni višini. Določena je bila vsebnost ekstraktivov, lignina, celuloze in hemiceluloz v beljavi in jedrovini ter skorji debel in vej. Testi so bili izvedeni v skladu s standardi tehničnega združenja za celulozo in papir (TAPPI). Vsebnost lignina, celuloze, hemiceluloz in celokupna vsebnost ekstraktivov je bila primerljiva v lesu debel in vej pri obeh vrstah. Vsebnost celuloze in hemiceluloz je bila pri obeh vrstah manjša v skorji kot v lesu. V beljavi smo zabeležili večjo vsebnost celuloze in hemiceluloz, v jedrovini in skorji pa večjo količino lignina in ekstraktivov. To utegne vplivati na slabšo odpornost beljave proti škodljivcem. Študija kaže, da sta jedrovina in skorja obeh vrst Nesogordonia papaverifera in Holarrhena floribunda lahko vir spojin z visoko dodano vrednostjo. structural components total extractives stem/branch wood bark Nesogordonia papaverifera Holarrhena floribunda strukturne komponente celokupni ekstrakti les debla/veje skorja Nesogordonia papaverifera Holarrhena floribunda true false true Angleški jezik Slovenski jezik Članek v reviji 2024-11-07 13:40:10 2024-11-07 13:40:15 2024-11-22 14:55:39 0000-00-00 00:00:00 2024 0 0 Str. 35-44 št. 1 Let. 73 2024 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 2024-01-01 630*813.1 2590-9932 213993475 RAZ_Antwi_Kwaku_2024.pdf RAZ_Antwi_Kwaku_2024.pdf 1 7417100811010C46309601E663D8F08A d6e829368d46c4888a0703ee41aaa7f5a2a4fbc96eb03da1d7cf1955207e92ab 85055f7a-9d05-11ef-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=195311 https://journals.uni-lj.si/les-wood/article/view/17226/15596 1 19780df4-9d05-11ef-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=195309 Biotehniška fakulteta Les 0 0 0