Destruction of Scots pine wood after a long exposure to anaerobic conditions
The wood of Scots pine after 100–600-year exposure to anaerobic conditions was studied. The samples were taken from the soil during archaeological excavations in the city of Veliky Novgorod. It has been established that the destruction of the secondary wall layers (mainly S2 layer) of tracheids in t...
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| Format: | Article |
| Language: | English |
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Russian Academy of Sciences, Siberian Branch Publishing House
2019-10-01
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| Series: | Сибирский лесной журнал |
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| Online Access: | http://xn--80abmehbaibgnewcmzjeef0c.xn--p1ai/upload/iblock/217/217ee8f2de8f90824f9aa38917bcd04a.pdf |
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| author | V. A. Kozlov O. A. Shapchenkova S. R. Loskutov M. A. Plyashechnik A. A. Aniskina G. V. Permyakova Y. A. Neronova |
| author_facet | V. A. Kozlov O. A. Shapchenkova S. R. Loskutov M. A. Plyashechnik A. A. Aniskina G. V. Permyakova Y. A. Neronova |
| author_sort | V. A. Kozlov |
| collection | DOAJ |
| description | The wood of Scots pine after 100–600-year exposure to anaerobic conditions was studied. The samples were taken from the soil during archaeological excavations in the city of Veliky Novgorod. It has been established that the destruction of the secondary wall layers (mainly S2 layer) of tracheids in the sapwood and heartwood occurred after 100 and 400 years of exposure, respectively. Archaeological wood contained mineral particles consisting of water-insoluble compounds of iron and potassium. The results of thermogravimetry showed the changes in the relative content of hemicelluloses, cellulose and lignin in the samples of archaeological wood. The proportion of hemicelluloses and cellulose in wood decreased by 8–13 % and the proportion of lignin increased by 6–9 % under the prolonged exposure to anaerobic conditions (400 and 600 years) compared to the samples of 100 and 200-year exposure. This was also confirmed by chemical analysis data. The oxidative thermal decomposition of the carbohydrate complex, as well as lignin started at lower temperatures indicating lower thermal stability of the main components of the wood substance. All the studied wood samples were characterized by a significantly higher proportion of residual mass after thermal decomposition compared to sound wood. This fact also suggested higher content of mineral substances. The total thermal effect of oxidative thermal decomposition of carbohydrate and aromatic components of the wood substance was noticeably higher (13.1 and 12.6 kJ • g–1) for the samples of 400 and 600-year exposure compared to those of 100 and 200-year exposure (8.9 and 10.8 kJ • g–1). Mono-and sesquiterpenes were found in wood, as well as diterpen 18-norabietan, the most resistant one to biological degradation, which accounted for 30–64 % of the total content of volatile organic substances. The obtained results indicated significant changes in the composition and structure of Scots pine wood after 400 years of exposure to anaerobic conditions. |
| first_indexed | 2024-12-17T05:52:13Z |
| format | Article |
| id | doaj.art-094055a5acf2431e8140fab6ac1205a5 |
| institution | Directory Open Access Journal |
| issn | 2311-1410 2312-2099 |
| language | English |
| last_indexed | 2024-12-17T05:52:13Z |
| publishDate | 2019-10-01 |
| publisher | Russian Academy of Sciences, Siberian Branch Publishing House |
| record_format | Article |
| series | Сибирский лесной журнал |
| spelling | doaj.art-094055a5acf2431e8140fab6ac1205a52022-12-21T22:01:08ZengRussian Academy of Sciences, Siberian Branch Publishing HouseСибирский лесной журнал2311-14102312-20992019-10-01659910810.15372/SJFS201905012Destruction of Scots pine wood after a long exposure to anaerobic conditionsV. A. Kozlov0O. A. Shapchenkova1S. R. Loskutov2M. A. Plyashechnik3A. A. Aniskina4G. V. Permyakova5Y. A. Neronova6Forest Research Institute, Karelian Research Centre, Russian Academy of Sciences Federal Research Center Karelian Scientific Center, Russian Academy of SciencesFederal Research Center Krasnoyarsk Scientific Center, Russian Academy of Sciences, Siberian Branch V.N. Sukachev Institute of Forest, Russian Academy of Sciences, Siberian BranchFederal Research Center Krasnoyarsk Scientific Center, Russian Academy of Sciences, Siberian Branch V.N. Sukachev Institute of Forest, Russian Academy of Sciences, Siberian BranchFederal Research Center Krasnoyarsk Scientific Center, Russian Academy of Sciences, Siberian Branch V.N. Sukachev Institute of Forest, Russian Academy of Sciences, Siberian BranchFederal Research Center Krasnoyarsk Scientific Center, Russian Academy of Sciences, Siberian Branch V.N. Sukachev Institute of Forest, Russian Academy of Sciences, Siberian BranchFederal Research Center Krasnoyarsk Scientific Center, Russian Academy of Sciences, Siberian Branch V.N. Sukachev Institute of Forest, Russian Academy of Sciences, Siberian BranchForest Research Institute, Karelian Research Centre, Russian Academy of Sciences Federal Research Center Karelian Scientific Center, Russian Academy of SciencesThe wood of Scots pine after 100–600-year exposure to anaerobic conditions was studied. The samples were taken from the soil during archaeological excavations in the city of Veliky Novgorod. It has been established that the destruction of the secondary wall layers (mainly S2 layer) of tracheids in the sapwood and heartwood occurred after 100 and 400 years of exposure, respectively. Archaeological wood contained mineral particles consisting of water-insoluble compounds of iron and potassium. The results of thermogravimetry showed the changes in the relative content of hemicelluloses, cellulose and lignin in the samples of archaeological wood. The proportion of hemicelluloses and cellulose in wood decreased by 8–13 % and the proportion of lignin increased by 6–9 % under the prolonged exposure to anaerobic conditions (400 and 600 years) compared to the samples of 100 and 200-year exposure. This was also confirmed by chemical analysis data. The oxidative thermal decomposition of the carbohydrate complex, as well as lignin started at lower temperatures indicating lower thermal stability of the main components of the wood substance. All the studied wood samples were characterized by a significantly higher proportion of residual mass after thermal decomposition compared to sound wood. This fact also suggested higher content of mineral substances. The total thermal effect of oxidative thermal decomposition of carbohydrate and aromatic components of the wood substance was noticeably higher (13.1 and 12.6 kJ • g–1) for the samples of 400 and 600-year exposure compared to those of 100 and 200-year exposure (8.9 and 10.8 kJ • g–1). Mono-and sesquiterpenes were found in wood, as well as diterpen 18-norabietan, the most resistant one to biological degradation, which accounted for 30–64 % of the total content of volatile organic substances. The obtained results indicated significant changes in the composition and structure of Scots pine wood after 400 years of exposure to anaerobic conditions.http://xn--80abmehbaibgnewcmzjeef0c.xn--p1ai/upload/iblock/217/217ee8f2de8f90824f9aa38917bcd04a.pdfarcheological woodpinus sylvestris l.biodestructionphysical-chemical analysis |
| spellingShingle | V. A. Kozlov O. A. Shapchenkova S. R. Loskutov M. A. Plyashechnik A. A. Aniskina G. V. Permyakova Y. A. Neronova Destruction of Scots pine wood after a long exposure to anaerobic conditions Сибирский лесной журнал archeological wood pinus sylvestris l. biodestruction physical-chemical analysis |
| title | Destruction of Scots pine wood after a long exposure to anaerobic conditions |
| title_full | Destruction of Scots pine wood after a long exposure to anaerobic conditions |
| title_fullStr | Destruction of Scots pine wood after a long exposure to anaerobic conditions |
| title_full_unstemmed | Destruction of Scots pine wood after a long exposure to anaerobic conditions |
| title_short | Destruction of Scots pine wood after a long exposure to anaerobic conditions |
| title_sort | destruction of scots pine wood after a long exposure to anaerobic conditions |
| topic | archeological wood pinus sylvestris l. biodestruction physical-chemical analysis |
| url | http://xn--80abmehbaibgnewcmzjeef0c.xn--p1ai/upload/iblock/217/217ee8f2de8f90824f9aa38917bcd04a.pdf |
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