Photodegradation of wood at elevated temperature: infrared spectroscopic study.
Identifieur interne : 002554 ( Main/Exploration ); précédent : 002553; suivant : 002555Photodegradation of wood at elevated temperature: infrared spectroscopic study.
Auteurs : Laszlo Tolvaj [Hongrie] ; Zsolt Molnar ; Robert NemethSource :
- Journal of photochemistry and photobiology. B, Biology [ 1873-2682 ] ; 2013.
Descripteurs français
- KwdFr :
- MESH :
- composition chimique : Bois.
- Photolyse, Spectrophotométrie IR, Température élevée.
English descriptors
- KwdEn :
- MESH :
- chemistry : Wood.
- Hot Temperature, Photolysis, Spectrophotometry, Infrared.
Abstract
The purpose of this investigation was to evaluate the effect of elevated temperature on the photodegradation of solid wood. The work presented here, deals with the changes of infrared spectrum generated by the photodegradation process. Wood samples were irradiated with a mercury vapour lamp. The photodegradation behaviours of conifers and deciduous species were studied at elevated (80 °C) and at ambient (30 °C) temperatures. The infrared data were analysed using the difference spectrum method. The properly calculated difference spectrum gave much more information about the chemical changes than the visual comparison of the absorption spectra measured before and after the irradiation. The results showed considerably greater degradation at 80 °C than at 30 °C. The difference spectra revealed the absorption increase of tree different types of carbonyl groups. Remarkable differences were found between the photodegradation behaviours of softwoods and hardwoods. Poplar belongs anatomically to the hardwoods but its photodegradation properties were between that of hardwoods and softwoods.
DOI: 10.1016/j.jphotobiol.2013.02.007
PubMed: 23501727
Affiliations:
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B, Biology</title><idno type="eISSN">1873-2682</idno><imprint><date when="2013" type="published">2013</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Hot Temperature (MeSH)</term><term>Photolysis (MeSH)</term><term>Spectrophotometry, Infrared (MeSH)</term><term>Wood (chemistry)</term></keywords><keywords scheme="KwdFr" xml:lang="fr"><term>Bois (composition chimique)</term><term>Photolyse (MeSH)</term><term>Spectrophotométrie IR (MeSH)</term><term>Température élevée (MeSH)</term></keywords><keywords scheme="MESH" qualifier="chemistry" xml:lang="en"><term>Wood</term></keywords><keywords scheme="MESH" qualifier="composition chimique" xml:lang="fr"><term>Bois</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Hot Temperature</term><term>Photolysis</term><term>Spectrophotometry, Infrared</term></keywords><keywords scheme="MESH" xml:lang="fr"><term>Photolyse</term><term>Spectrophotométrie IR</term><term>Température élevée</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">The purpose of this investigation was to evaluate the effect of elevated temperature on the photodegradation of solid wood. The work presented here, deals with the changes of infrared spectrum generated by the photodegradation process. Wood samples were irradiated with a mercury vapour lamp. The photodegradation behaviours of conifers and deciduous species were studied at elevated (80 °C) and at ambient (30 °C) temperatures. The infrared data were analysed using the difference spectrum method. The properly calculated difference spectrum gave much more information about the chemical changes than the visual comparison of the absorption spectra measured before and after the irradiation. The results showed considerably greater degradation at 80 °C than at 30 °C. The difference spectra revealed the absorption increase of tree different types of carbonyl groups. Remarkable differences were found between the photodegradation behaviours of softwoods and hardwoods. Poplar belongs anatomically to the hardwoods but its photodegradation properties were between that of hardwoods and softwoods.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">23501727</PMID><DateCompleted><Year>2013</Year><Month>09</Month><Day>27</Day></DateCompleted><DateRevised><Year>2013</Year><Month>04</Month><Day>01</Day></DateRevised><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Electronic">1873-2682</ISSN><JournalIssue CitedMedium="Internet"><Volume>121</Volume><PubDate><Year>2013</Year><Month>Apr</Month><Day>05</Day></PubDate></JournalIssue><Title>Journal of photochemistry and photobiology. B, Biology</Title><ISOAbbreviation>J Photochem Photobiol B</ISOAbbreviation></Journal><ArticleTitle>Photodegradation of wood at elevated temperature: infrared spectroscopic study.</ArticleTitle><Pagination><MedlinePgn>32-6</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1016/j.jphotobiol.2013.02.007</ELocationID><ELocationID EIdType="pii" ValidYN="Y">S1011-1344(13)00034-1</ELocationID><Abstract><AbstractText>The purpose of this investigation was to evaluate the effect of elevated temperature on the photodegradation of solid wood. The work presented here, deals with the changes of infrared spectrum generated by the photodegradation process. Wood samples were irradiated with a mercury vapour lamp. The photodegradation behaviours of conifers and deciduous species were studied at elevated (80 °C) and at ambient (30 °C) temperatures. The infrared data were analysed using the difference spectrum method. The properly calculated difference spectrum gave much more information about the chemical changes than the visual comparison of the absorption spectra measured before and after the irradiation. The results showed considerably greater degradation at 80 °C than at 30 °C. The difference spectra revealed the absorption increase of tree different types of carbonyl groups. Remarkable differences were found between the photodegradation behaviours of softwoods and hardwoods. Poplar belongs anatomically to the hardwoods but its photodegradation properties were between that of hardwoods and softwoods.</AbstractText><CopyrightInformation>Copyright © 2013 Elsevier B.V. All rights reserved.</CopyrightInformation></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Tolvaj</LastName><ForeName>Laszlo</ForeName><Initials>L</Initials><AffiliationInfo><Affiliation>University of West Hungary, Faculty of Wood Sciences, Bajcsy Zs. u. 4., Sopron, Hungary. tolla@fmk.nyme.hu</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Molnar</LastName><ForeName>Zsolt</ForeName><Initials>Z</Initials></Author><Author ValidYN="Y"><LastName>Nemeth</LastName><ForeName>Robert</ForeName><Initials>R</Initials></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType><PublicationType UI="D013485">Research Support, Non-U.S. Gov't</PublicationType></PublicationTypeList><ArticleDate DateType="Electronic"><Year>2013</Year><Month>02</Month><Day>16</Day></ArticleDate></Article><MedlineJournalInfo><Country>Switzerland</Country><MedlineTA>J Photochem Photobiol B</MedlineTA><NlmUniqueID>8804966</NlmUniqueID><ISSNLinking>1011-1344</ISSNLinking></MedlineJournalInfo><CitationSubset>IM</CitationSubset><MeshHeadingList><MeshHeading><DescriptorName UI="D006358" MajorTopicYN="Y">Hot Temperature</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D010782" MajorTopicYN="Y">Photolysis</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D013055" MajorTopicYN="Y">Spectrophotometry, Infrared</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D014934" MajorTopicYN="N">Wood</DescriptorName><QualifierName UI="Q000737" MajorTopicYN="Y">chemistry</QualifierName></MeshHeading></MeshHeadingList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="received"><Year>2012</Year><Month>12</Month><Day>21</Day></PubMedPubDate><PubMedPubDate PubStatus="revised"><Year>2013</Year><Month>02</Month><Day>01</Day></PubMedPubDate><PubMedPubDate PubStatus="accepted"><Year>2013</Year><Month>02</Month><Day>04</Day></PubMedPubDate><PubMedPubDate PubStatus="entrez"><Year>2013</Year><Month>3</Month><Day>19</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>2013</Year><Month>3</Month><Day>19</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2013</Year><Month>9</Month><Day>28</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">23501727</ArticleId><ArticleId IdType="pii">S1011-1344(13)00034-1</ArticleId><ArticleId IdType="doi">10.1016/j.jphotobiol.2013.02.007</ArticleId></ArticleIdList></PubmedData></pubmed><affiliations><list><country><li>Hongrie</li></country></list><tree><noCountry><name sortKey="Molnar, Zsolt" sort="Molnar, Zsolt" uniqKey="Molnar Z" first="Zsolt" last="Molnar">Zsolt Molnar</name><name sortKey="Nemeth, Robert" sort="Nemeth, Robert" uniqKey="Nemeth R" first="Robert" last="Nemeth">Robert Nemeth</name></noCountry><country name="Hongrie"><noRegion><name sortKey="Tolvaj, Laszlo" sort="Tolvaj, Laszlo" uniqKey="Tolvaj L" first="Laszlo" last="Tolvaj">Laszlo Tolvaj</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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