Interaction of lignin and polysaccharides in beech wood (Fagus sylvatica) during drying processes
13C CP MAS NMR spectroscopy was used to characterize the structural changes of cell wall polymers in beech wood Fagus sylvatica during drying processes. The analysis of five wood samples, namely, untreated, untreated dried, pre-treated by steam and/or NaOH subjected to drying showed partial depolyme...
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| Veröffentlicht in: | Wood science and technology 1999-11, Vol.33 (5), p.373-380 |
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| creator | Kosikova, B Hricovini, M Cosentino, C |
| description | 13C CP MAS NMR spectroscopy was used to characterize the structural changes of cell wall polymers in beech wood Fagus sylvatica during drying processes. The analysis of five wood samples, namely, untreated, untreated dried, pre-treated by steam and/or NaOH subjected to drying showed partial depolymerization of lignin component as well as the change of the ratio of the crystalline and of the amorphous parts of cellulose as the consequence of wood pre-treatment. In addition, T1p(1H) relaxation times were determined in beech wood sample pre-treated with steam at 135 degrees C and the lignin isolated from this sample. The magnitudes of the relaxation times were found comparable in both samples as well as in the lignin-cellulose model compound. These unique T1p(1H) values indicate that spin diffusion is complete and homogeneous due to spatial proximity of spins and confirmed the formation of lignin-cellulose complex during thermal treatment of wood. |
| doi_str_mv | 10.1007/s002260050123 |
| format | Article |
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The analysis of five wood samples, namely, untreated, untreated dried, pre-treated by steam and/or NaOH subjected to drying showed partial depolymerization of lignin component as well as the change of the ratio of the crystalline and of the amorphous parts of cellulose as the consequence of wood pre-treatment. In addition, T1p(1H) relaxation times were determined in beech wood sample pre-treated with steam at 135 degrees C and the lignin isolated from this sample. The magnitudes of the relaxation times were found comparable in both samples as well as in the lignin-cellulose model compound. These unique T1p(1H) values indicate that spin diffusion is complete and homogeneous due to spatial proximity of spins and confirmed the formation of lignin-cellulose complex during thermal treatment of wood.</description><identifier>ISSN: 0043-7719</identifier><identifier>EISSN: 1432-5225</identifier><identifier>DOI: 10.1007/s002260050123</identifier><identifier>CODEN: WOSTBE</identifier><language>eng</language><publisher>Berlin: Springer</publisher><subject>Applied sciences ; Beech ; Cell walls ; Cellulose ; Depolymerization ; Drying ; Exact sciences and technology ; Fagus sylvatica ; Heat treatment ; Lignin ; Magnetic resonance spectroscopy ; Mechanical woodworking and drying ; NMR ; NMR spectroscopy ; Nuclear magnetic resonance ; nuclear magnetic resonance spectroscopy ; Polymer industry, paints, wood ; Polymers ; Polysaccharides ; Pretreatment ; Saccharides ; Sodium hydroxide ; Wood ; Wood. Paper. Non wovens</subject><ispartof>Wood science and technology, 1999-11, Vol.33 (5), p.373-380</ispartof><rights>2000 INIST-CNRS</rights><rights>Wood Science and Technology is a copyright of Springer, (1999). All Rights Reserved.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c382t-8fbe05d09af938d719a1d4a309cc80fbd44beee0f6b997c6357543ad8b7f3df73</citedby></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,776,780,27903,27904</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=1183365$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Kosikova, B</creatorcontrib><creatorcontrib>Hricovini, M</creatorcontrib><creatorcontrib>Cosentino, C</creatorcontrib><title>Interaction of lignin and polysaccharides in beech wood (Fagus sylvatica) during drying processes</title><title>Wood science and technology</title><description>13C CP MAS NMR spectroscopy was used to characterize the structural changes of cell wall polymers in beech wood Fagus sylvatica during drying processes. The analysis of five wood samples, namely, untreated, untreated dried, pre-treated by steam and/or NaOH subjected to drying showed partial depolymerization of lignin component as well as the change of the ratio of the crystalline and of the amorphous parts of cellulose as the consequence of wood pre-treatment. In addition, T1p(1H) relaxation times were determined in beech wood sample pre-treated with steam at 135 degrees C and the lignin isolated from this sample. The magnitudes of the relaxation times were found comparable in both samples as well as in the lignin-cellulose model compound. These unique T1p(1H) values indicate that spin diffusion is complete and homogeneous due to spatial proximity of spins and confirmed the formation of lignin-cellulose complex during thermal treatment of wood.</description><subject>Applied sciences</subject><subject>Beech</subject><subject>Cell walls</subject><subject>Cellulose</subject><subject>Depolymerization</subject><subject>Drying</subject><subject>Exact sciences and technology</subject><subject>Fagus sylvatica</subject><subject>Heat treatment</subject><subject>Lignin</subject><subject>Magnetic resonance spectroscopy</subject><subject>Mechanical woodworking and drying</subject><subject>NMR</subject><subject>NMR spectroscopy</subject><subject>Nuclear magnetic resonance</subject><subject>nuclear magnetic resonance spectroscopy</subject><subject>Polymer industry, paints, wood</subject><subject>Polymers</subject><subject>Polysaccharides</subject><subject>Pretreatment</subject><subject>Saccharides</subject><subject>Sodium hydroxide</subject><subject>Wood</subject><subject>Wood. Paper. 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Paper. Non wovens</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Kosikova, B</creatorcontrib><creatorcontrib>Hricovini, M</creatorcontrib><creatorcontrib>Cosentino, C</creatorcontrib><collection>AGRIS</collection><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>ProQuest SciTech Collection</collection><collection>ProQuest Technology Collection</collection><collection>Materials Science & Engineering Collection</collection><collection>ProQuest One Sustainability</collection><collection>ProQuest Central UK/Ireland</collection><collection>Agricultural & Environmental Science Collection</collection><collection>ProQuest Central Essentials</collection><collection>ProQuest Central</collection><collection>Technology Collection</collection><collection>Natural Science Collection</collection><collection>ProQuest One Community College</collection><collection>ProQuest Materials Science Collection</collection><collection>ProQuest Central Korea</collection><collection>ProQuest Central Student</collection><collection>SciTech Premium Collection</collection><collection>Materials Science Database</collection><collection>Environmental Science Database</collection><collection>Materials Science Collection</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>Environmental Science Collection</collection><jtitle>Wood science and technology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Kosikova, B</au><au>Hricovini, M</au><au>Cosentino, C</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Interaction of lignin and polysaccharides in beech wood (Fagus sylvatica) during drying processes</atitle><jtitle>Wood science and technology</jtitle><date>1999-11-08</date><risdate>1999</risdate><volume>33</volume><issue>5</issue><spage>373</spage><epage>380</epage><pages>373-380</pages><issn>0043-7719</issn><eissn>1432-5225</eissn><coden>WOSTBE</coden><abstract>13C CP MAS NMR spectroscopy was used to characterize the structural changes of cell wall polymers in beech wood Fagus sylvatica during drying processes. The analysis of five wood samples, namely, untreated, untreated dried, pre-treated by steam and/or NaOH subjected to drying showed partial depolymerization of lignin component as well as the change of the ratio of the crystalline and of the amorphous parts of cellulose as the consequence of wood pre-treatment. In addition, T1p(1H) relaxation times were determined in beech wood sample pre-treated with steam at 135 degrees C and the lignin isolated from this sample. The magnitudes of the relaxation times were found comparable in both samples as well as in the lignin-cellulose model compound. These unique T1p(1H) values indicate that spin diffusion is complete and homogeneous due to spatial proximity of spins and confirmed the formation of lignin-cellulose complex during thermal treatment of wood.</abstract><cop>Berlin</cop><pub>Springer</pub><doi>10.1007/s002260050123</doi><tpages>8</tpages></addata></record> |
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| subjects | Applied sciences Beech Cell walls Cellulose Depolymerization Drying Exact sciences and technology Fagus sylvatica Heat treatment Lignin Magnetic resonance spectroscopy Mechanical woodworking and drying NMR NMR spectroscopy Nuclear magnetic resonance nuclear magnetic resonance spectroscopy Polymer industry, paints, wood Polymers Polysaccharides Pretreatment Saccharides Sodium hydroxide Wood Wood. Paper. Non wovens |
| title | Interaction of lignin and polysaccharides in beech wood (Fagus sylvatica) during drying processes |
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