The effect of liquid hot water pretreatment on the chemical-structural alteration and the reduced recalcitrance in poplar.
Identifieur interne : 001160 ( Main/Exploration ); précédent : 001159; suivant : 001161The effect of liquid hot water pretreatment on the chemical-structural alteration and the reduced recalcitrance in poplar.
Auteurs : Mi Li [États-Unis] ; Shilin Cao [États-Unis, République populaire de Chine] ; Xianzhi Meng [États-Unis] ; Michael Studer [États-Unis, Suisse] ; Charles E. Wyman [États-Unis] ; Arthur J. Ragauskas [États-Unis] ; Yunqiao Pu [États-Unis]Source :
- Biotechnology for biofuels [ 1754-6834 ] ; 2017.
Abstract
Background
Hydrothermal pretreatment using liquid hot water (LHW) is capable of substantially reducing the cell wall recalcitrance of lignocellulosic biomass. It enhances the saccharification of polysaccharides, particularly cellulose, into glucose with relatively low capital required. Due to the close association with biomass recalcitrance, the structural change of the components of lignocellulosic materials during the pretreatment is crucial to understand pretreatment chemistry and advance the bio-economy. Although the LHW pretreatment has been extensively applied and studied, the molecular structural alteration during pretreatment and its significance to reduced recalcitrance have not been well understood.
Results
We investigated the effects of LHW pretreatment with different severity factors (log
Conclusions
This study revealed that the solubilization of xylan, the reduction of hemicellulose molecular weights and cellulose degree of polymerization, and the cleavage of alkyl-aryl ether bonds in lignin resulted from LHW pretreatment are critical factors associated with reduced cell wall recalcitrance. The chemical-structural changes of the three major components, cellulose, lignin, and hemicellulose, during LHW pretreatment provide useful and fundamental information of factors governing feedstock recalcitrance during hydrothermal pretreatment.
DOI: 10.1186/s13068-017-0926-6
PubMed: 29213308
PubMed Central: PMC5707831
Affiliations:
- République populaire de Chine, Suisse, États-Unis
- Californie, Canton de Berne, Fujian, Géorgie (États-Unis), Tennessee
- Berne, Fuzhou
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Wyman</name><affiliation wicri:level="1"><nlm:affiliation>BioEnergy Science Center (BESC), Oak Ridge, USA.</nlm:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>BioEnergy Science Center (BESC), Oak Ridge</wicri:regionArea><wicri:noRegion>Oak Ridge</wicri:noRegion></affiliation><affiliation wicri:level="2"><nlm:affiliation>College of Engineering - Center for Environmental Research and Technology (CE-CERT), Bourns College of Engineering, University of California, Riverside, CA USA.</nlm:affiliation><country>États-Unis</country><placeName><region type="state">Californie</region></placeName><wicri:cityArea>College of Engineering - Center for Environmental Research and Technology (CE-CERT), Bourns College of Engineering, University of California, Riverside</wicri:cityArea></affiliation></author><author><name sortKey="Ragauskas, Arthur J" sort="Ragauskas, Arthur J" uniqKey="Ragauskas A" first="Arthur J" last="Ragauskas">Arthur J. 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wicri:level="2"><nlm:affiliation>Department of Forestry, Wildlife, and Fisheries, Center for Renewable Carbon, University of Tennessee Institute of Agriculture, Knoxville, TN USA.</nlm:affiliation><country>États-Unis</country><placeName><region type="state">Tennessee</region></placeName><wicri:cityArea>Department of Forestry, Wildlife, and Fisheries, Center for Renewable Carbon, University of Tennessee Institute of Agriculture, Knoxville</wicri:cityArea></affiliation></author><author><name sortKey="Pu, Yunqiao" sort="Pu, Yunqiao" uniqKey="Pu Y" first="Yunqiao" last="Pu">Yunqiao Pu</name><affiliation wicri:level="1"><nlm:affiliation>BioEnergy Science Center (BESC), Oak Ridge, USA.</nlm:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>BioEnergy Science Center (BESC), Oak Ridge</wicri:regionArea><wicri:noRegion>Oak Ridge</wicri:noRegion></affiliation><affiliation wicri:level="2"><nlm:affiliation>Biosciences Division, ORNL, Oak Ridge, TN 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poplar.</title><author><name sortKey="Li, Mi" sort="Li, Mi" uniqKey="Li M" first="Mi" last="Li">Mi Li</name><affiliation wicri:level="1"><nlm:affiliation>BioEnergy Science Center (BESC), Oak Ridge, USA.</nlm:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>BioEnergy Science Center (BESC), Oak Ridge</wicri:regionArea><wicri:noRegion>Oak Ridge</wicri:noRegion></affiliation><affiliation wicri:level="2"><nlm:affiliation>Biosciences Division, ORNL, Oak Ridge, TN USA.</nlm:affiliation><country>États-Unis</country><placeName><region type="state">Tennessee</region></placeName><wicri:cityArea>Biosciences Division, ORNL, Oak Ridge</wicri:cityArea></affiliation></author><author><name sortKey="Cao, Shilin" sort="Cao, Shilin" uniqKey="Cao S" first="Shilin" last="Cao">Shilin Cao</name><affiliation wicri:level="2"><nlm:affiliation>School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, GA USA.</nlm:affiliation><country>États-Unis</country><placeName><region type="state">Géorgie (États-Unis)</region></placeName><wicri:cityArea>School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta</wicri:cityArea></affiliation><affiliation wicri:level="3"><nlm:affiliation>Present Address: College of Material Engineering, Fujian Agriculture and Forestry University, Fuzhou, People's Republic of China.</nlm:affiliation><country xml:lang="fr">République populaire de Chine</country><wicri:regionArea>Present Address: College of Material Engineering, Fujian Agriculture and Forestry University, Fuzhou</wicri:regionArea><placeName><settlement type="city">Fuzhou</settlement><region type="province">Fujian</region></placeName></affiliation></author><author><name sortKey="Meng, Xianzhi" sort="Meng, Xianzhi" uniqKey="Meng X" first="Xianzhi" last="Meng">Xianzhi Meng</name><affiliation wicri:level="2"><nlm:affiliation>Department of Chemical and Biomolecular Engineering, University of Tennessee, Knoxville, TN USA.</nlm:affiliation><country>États-Unis</country><placeName><region type="state">Tennessee</region></placeName><wicri:cityArea>Department of Chemical and Biomolecular Engineering, University of Tennessee, Knoxville</wicri:cityArea></affiliation></author><author><name sortKey="Studer, Michael" sort="Studer, Michael" uniqKey="Studer M" first="Michael" last="Studer">Michael Studer</name><affiliation wicri:level="1"><nlm:affiliation>BioEnergy Science Center (BESC), Oak Ridge, USA.</nlm:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>BioEnergy Science Center (BESC), Oak Ridge</wicri:regionArea><wicri:noRegion>Oak Ridge</wicri:noRegion></affiliation><affiliation wicri:level="2"><nlm:affiliation>College of Engineering - Center for Environmental Research and Technology (CE-CERT), Bourns College of Engineering, University of California, Riverside, CA USA.</nlm:affiliation><country>États-Unis</country><placeName><region type="state">Californie</region></placeName><wicri:cityArea>College of Engineering - Center for Environmental Research and Technology (CE-CERT), Bourns College of Engineering, University of California, Riverside</wicri:cityArea></affiliation><affiliation wicri:level="3"><nlm:affiliation>Present Address: Laboratory for Bioenergy and Biochemicals, School of Agricultural, Forest and Food Sciences, Bern University of Applied Sciences, Bern, Switzerland.</nlm:affiliation><country xml:lang="fr">Suisse</country><wicri:regionArea>Present Address: Laboratory for Bioenergy and Biochemicals, School of Agricultural, Forest and Food Sciences, Bern University of Applied Sciences, Bern</wicri:regionArea><placeName><settlement type="city">Berne</settlement><region type="région" nuts="3">Canton de Berne</region></placeName></affiliation></author><author><name sortKey="Wyman, Charles E" sort="Wyman, Charles E" uniqKey="Wyman C" first="Charles E" last="Wyman">Charles E. Wyman</name><affiliation wicri:level="1"><nlm:affiliation>BioEnergy Science Center (BESC), Oak Ridge, USA.</nlm:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>BioEnergy Science Center (BESC), Oak Ridge</wicri:regionArea><wicri:noRegion>Oak Ridge</wicri:noRegion></affiliation><affiliation wicri:level="2"><nlm:affiliation>College of Engineering - Center for Environmental Research and Technology (CE-CERT), Bourns College of Engineering, University of California, Riverside, CA USA.</nlm:affiliation><country>États-Unis</country><placeName><region type="state">Californie</region></placeName><wicri:cityArea>College of Engineering - Center for Environmental Research and Technology (CE-CERT), Bourns College of Engineering, University of California, Riverside</wicri:cityArea></affiliation></author><author><name sortKey="Ragauskas, Arthur J" sort="Ragauskas, Arthur J" uniqKey="Ragauskas A" first="Arthur J" last="Ragauskas">Arthur J. Ragauskas</name><affiliation wicri:level="1"><nlm:affiliation>BioEnergy Science Center (BESC), Oak Ridge, USA.</nlm:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>BioEnergy Science Center (BESC), Oak Ridge</wicri:regionArea><wicri:noRegion>Oak Ridge</wicri:noRegion></affiliation><affiliation wicri:level="2"><nlm:affiliation>Biosciences Division, ORNL, Oak Ridge, TN USA.</nlm:affiliation><country>États-Unis</country><placeName><region type="state">Tennessee</region></placeName><wicri:cityArea>Biosciences Division, ORNL, Oak Ridge</wicri:cityArea></affiliation><affiliation wicri:level="2"><nlm:affiliation>Department of Chemical and Biomolecular Engineering, University of Tennessee, Knoxville, TN USA.</nlm:affiliation><country>États-Unis</country><placeName><region type="state">Tennessee</region></placeName><wicri:cityArea>Department of Chemical and Biomolecular Engineering, University of Tennessee, Knoxville</wicri:cityArea></affiliation><affiliation wicri:level="2"><nlm:affiliation>Department of Forestry, Wildlife, and Fisheries, Center for Renewable Carbon, University of Tennessee Institute of Agriculture, Knoxville, TN USA.</nlm:affiliation><country>États-Unis</country><placeName><region type="state">Tennessee</region></placeName><wicri:cityArea>Department of Forestry, Wildlife, and Fisheries, Center for Renewable Carbon, University of Tennessee Institute of Agriculture, Knoxville</wicri:cityArea></affiliation></author><author><name sortKey="Pu, Yunqiao" sort="Pu, Yunqiao" uniqKey="Pu Y" first="Yunqiao" last="Pu">Yunqiao Pu</name><affiliation wicri:level="1"><nlm:affiliation>BioEnergy Science Center (BESC), Oak Ridge, USA.</nlm:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>BioEnergy Science Center (BESC), Oak Ridge</wicri:regionArea><wicri:noRegion>Oak Ridge</wicri:noRegion></affiliation><affiliation wicri:level="2"><nlm:affiliation>Biosciences Division, ORNL, Oak Ridge, TN USA.</nlm:affiliation><country>États-Unis</country><placeName><region type="state">Tennessee</region></placeName><wicri:cityArea>Biosciences Division, ORNL, Oak Ridge</wicri:cityArea></affiliation></author></analytic><series><title level="j">Biotechnology for biofuels</title><idno type="ISSN">1754-6834</idno><imprint><date when="2017" type="published">2017</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"><p><b>Background</b></p><p>Hydrothermal pretreatment using liquid hot water (LHW) is capable of substantially reducing the cell wall recalcitrance of lignocellulosic biomass. It enhances the saccharification of polysaccharides, particularly cellulose, into glucose with relatively low capital required. Due to the close association with biomass recalcitrance, the structural change of the components of lignocellulosic materials during the pretreatment is crucial to understand pretreatment chemistry and advance the bio-economy. Although the LHW pretreatment has been extensively applied and studied, the molecular structural alteration during pretreatment and its significance to reduced recalcitrance have not been well understood.</p></div><div type="abstract" xml:lang="en"><p><b>Results</b></p><p>We investigated the effects of LHW pretreatment with different severity factors (log </p></div><div type="abstract" xml:lang="en"><p><b>Conclusions</b></p><p>This study revealed that the solubilization of xylan, the reduction of hemicellulose molecular weights and cellulose degree of polymerization, and the cleavage of alkyl-aryl ether bonds in lignin resulted from LHW pretreatment are critical factors associated with reduced cell wall recalcitrance. The chemical-structural changes of the three major components, cellulose, lignin, and hemicellulose, during LHW pretreatment provide useful and fundamental information of factors governing feedstock recalcitrance during hydrothermal pretreatment.</p></div></front></TEI><pubmed><MedlineCitation Status="PubMed-not-MEDLINE" Owner="NLM"><PMID Version="1">29213308</PMID><DateRevised><Year>2020</Year><Month>10</Month><Day>01</Day></DateRevised><Article PubModel="Electronic-eCollection"><Journal><ISSN IssnType="Print">1754-6834</ISSN><JournalIssue CitedMedium="Print"><Volume>10</Volume><PubDate><Year>2017</Year></PubDate></JournalIssue><Title>Biotechnology for biofuels</Title><ISOAbbreviation>Biotechnol Biofuels</ISOAbbreviation></Journal><ArticleTitle>The effect of liquid hot water pretreatment on the chemical-structural alteration and the reduced recalcitrance in poplar.</ArticleTitle><Pagination><MedlinePgn>237</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1186/s13068-017-0926-6</ELocationID><Abstract><AbstractText Label="Background" NlmCategory="UNASSIGNED">Hydrothermal pretreatment using liquid hot water (LHW) is capable of substantially reducing the cell wall recalcitrance of lignocellulosic biomass. It enhances the saccharification of polysaccharides, particularly cellulose, into glucose with relatively low capital required. Due to the close association with biomass recalcitrance, the structural change of the components of lignocellulosic materials during the pretreatment is crucial to understand pretreatment chemistry and advance the bio-economy. Although the LHW pretreatment has been extensively applied and studied, the molecular structural alteration during pretreatment and its significance to reduced recalcitrance have not been well understood.</AbstractText><AbstractText Label="Results" NlmCategory="UNASSIGNED">We investigated the effects of LHW pretreatment with different severity factors (log <i>R</i><sub>0</sub>) on the structural changes of fast-grown poplar (<i>Populus trichocarpa</i>). With the severity factor ranging from 3.6 to 4.2, LHW pretreatment resulted in a substantial xylan solubilization by 50-77% (<i>w/w</i>, dry matter). The molecular weights of the remained hemicellulose in pretreated solids also have been significantly reduced by 63-75% corresponding to LHW severity factor from 3.6 to 4.2. In addition, LHW had a considerable impact on the cellulose structure. The cellulose crystallinity increased 6-9%, whereas its degree of polymerization decreased 35-65% after pretreatment. We found that the pretreatment severity had an empirical linear correlation with the xylan solubilization (<i>R</i><sup>2</sup> = 0.98, <i>r</i> = + 0.99), hemicellulose molecular weight reduction (<i>R</i><sup>2</sup> = 0.97, <i>r</i> = - 0.96 and <i>R</i><sup>2</sup> = 0.93, <i>r</i> = - 0.98 for number-average and weight-average degree of polymerization, respectively), and cellulose crystallinity index increase (<i>R</i><sup>2</sup> = 0.98, <i>r</i> = + 0.99). The LHW pretreatment also resulted in small changes in lignin structure such as decrease of β-<i>O</i>-4' ether linkages and removal of cinnamyl alcohol end group and acetyl group, while the S/G ratio of lignin in LHW pretreated poplar residue remained no significant change compared with the untreated poplar.</AbstractText><AbstractText Label="Conclusions" NlmCategory="UNASSIGNED">This study revealed that the solubilization of xylan, the reduction of hemicellulose molecular weights and cellulose degree of polymerization, and the cleavage of alkyl-aryl ether bonds in lignin resulted from LHW pretreatment are critical factors associated with reduced cell wall recalcitrance. The chemical-structural changes of the three major components, cellulose, lignin, and hemicellulose, during LHW pretreatment provide useful and fundamental information of factors governing feedstock recalcitrance during hydrothermal pretreatment.</AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y" EqualContrib="Y"><LastName>Li</LastName><ForeName>Mi</ForeName><Initials>M</Initials><Identifier Source="ORCID">0000-0001-7523-1266</Identifier><AffiliationInfo><Affiliation>BioEnergy Science Center (BESC), Oak Ridge, USA.</Affiliation></AffiliationInfo><AffiliationInfo><Affiliation>Biosciences Division, ORNL, Oak Ridge, TN USA.</Affiliation><Identifier Source="ISNI">0000 0004 0446 2659</Identifier><Identifier Source="GRID">grid.135519.a</Identifier></AffiliationInfo></Author><Author ValidYN="Y" EqualContrib="Y"><LastName>Cao</LastName><ForeName>Shilin</ForeName><Initials>S</Initials><AffiliationInfo><Affiliation>School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, GA USA.</Affiliation><Identifier Source="ISNI">0000 0001 2097 4943</Identifier><Identifier Source="GRID">grid.213917.f</Identifier></AffiliationInfo><AffiliationInfo><Affiliation>Present Address: College of Material Engineering, Fujian Agriculture and Forestry University, Fuzhou, People's Republic of China.</Affiliation><Identifier Source="ISNI">0000 0004 1760 2876</Identifier><Identifier Source="GRID">grid.256111.0</Identifier></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Meng</LastName><ForeName>Xianzhi</ForeName><Initials>X</Initials><AffiliationInfo><Affiliation>Department of Chemical and Biomolecular Engineering, University of Tennessee, Knoxville, TN USA.</Affiliation><Identifier Source="ISNI">0000 0001 2315 1184</Identifier><Identifier Source="GRID">grid.411461.7</Identifier></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Studer</LastName><ForeName>Michael</ForeName><Initials>M</Initials><AffiliationInfo><Affiliation>BioEnergy Science Center (BESC), Oak Ridge, USA.</Affiliation></AffiliationInfo><AffiliationInfo><Affiliation>College of Engineering - Center for Environmental Research and Technology (CE-CERT), Bourns College of Engineering, University of California, Riverside, CA USA.</Affiliation><Identifier Source="ISNI">0000 0001 2222 1582</Identifier><Identifier Source="GRID">grid.266097.c</Identifier></AffiliationInfo><AffiliationInfo><Affiliation>Present Address: Laboratory for Bioenergy and Biochemicals, School of Agricultural, Forest and Food Sciences, Bern University of Applied Sciences, Bern, Switzerland.</Affiliation><Identifier Source="ISNI">0000 0001 0688 6779</Identifier><Identifier Source="GRID">grid.424060.4</Identifier></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Wyman</LastName><ForeName>Charles E</ForeName><Initials>CE</Initials><AffiliationInfo><Affiliation>BioEnergy Science Center (BESC), Oak Ridge, USA.</Affiliation></AffiliationInfo><AffiliationInfo><Affiliation>College of Engineering - Center for Environmental Research and Technology (CE-CERT), Bourns College of Engineering, University of California, Riverside, CA USA.</Affiliation><Identifier Source="ISNI">0000 0001 2222 1582</Identifier><Identifier Source="GRID">grid.266097.c</Identifier></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Ragauskas</LastName><ForeName>Arthur J</ForeName><Initials>AJ</Initials><Identifier Source="ORCID">0000-0002-3536-554X</Identifier><AffiliationInfo><Affiliation>BioEnergy Science Center (BESC), Oak Ridge, USA.</Affiliation></AffiliationInfo><AffiliationInfo><Affiliation>Biosciences Division, ORNL, Oak Ridge, TN USA.</Affiliation><Identifier Source="ISNI">0000 0004 0446 2659</Identifier><Identifier Source="GRID">grid.135519.a</Identifier></AffiliationInfo><AffiliationInfo><Affiliation>Department of Chemical and Biomolecular Engineering, University of Tennessee, Knoxville, TN USA.</Affiliation><Identifier Source="ISNI">0000 0001 2315 1184</Identifier><Identifier Source="GRID">grid.411461.7</Identifier></AffiliationInfo><AffiliationInfo><Affiliation>Department of Forestry, Wildlife, and Fisheries, Center for Renewable Carbon, University of Tennessee Institute of Agriculture, Knoxville, TN USA.</Affiliation><Identifier Source="ISNI">0000 0001 2315 1184</Identifier><Identifier Source="GRID">grid.411461.7</Identifier></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Pu</LastName><ForeName>Yunqiao</ForeName><Initials>Y</Initials><Identifier Source="ORCID">0000-0003-2554-1447</Identifier><AffiliationInfo><Affiliation>BioEnergy Science Center (BESC), Oak Ridge, USA.</Affiliation></AffiliationInfo><AffiliationInfo><Affiliation>Biosciences Division, ORNL, Oak Ridge, TN USA.</Affiliation><Identifier Source="ISNI">0000 0004 0446 2659</Identifier><Identifier Source="GRID">grid.135519.a</Identifier></AffiliationInfo></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType></PublicationTypeList><ArticleDate DateType="Electronic"><Year>2017</Year><Month>11</Month><Day>30</Day></ArticleDate></Article><MedlineJournalInfo><Country>England</Country><MedlineTA>Biotechnol Biofuels</MedlineTA><NlmUniqueID>101316935</NlmUniqueID><ISSNLinking>1754-6834</ISSNLinking></MedlineJournalInfo><KeywordList Owner="NOTNLM"><Keyword MajorTopicYN="N">Biomass recalcitrance</Keyword><Keyword MajorTopicYN="N">Biopolymers structures</Keyword><Keyword MajorTopicYN="N">Liquid hot water pretreatment</Keyword><Keyword MajorTopicYN="N">Poplar</Keyword></KeywordList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="received"><Year>2017</Year><Month>06</Month><Day>16</Day></PubMedPubDate><PubMedPubDate PubStatus="accepted"><Year>2017</Year><Month>10</Month><Day>06</Day></PubMedPubDate><PubMedPubDate PubStatus="entrez"><Year>2017</Year><Month>12</Month><Day>8</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate 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Meng</name><name sortKey="Pu, Yunqiao" sort="Pu, Yunqiao" uniqKey="Pu Y" first="Yunqiao" last="Pu">Yunqiao Pu</name><name sortKey="Pu, Yunqiao" sort="Pu, Yunqiao" uniqKey="Pu Y" first="Yunqiao" last="Pu">Yunqiao Pu</name><name sortKey="Ragauskas, Arthur J" sort="Ragauskas, Arthur J" uniqKey="Ragauskas A" first="Arthur J" last="Ragauskas">Arthur J. Ragauskas</name><name sortKey="Ragauskas, Arthur J" sort="Ragauskas, Arthur J" uniqKey="Ragauskas A" first="Arthur J" last="Ragauskas">Arthur J. Ragauskas</name><name sortKey="Ragauskas, Arthur J" sort="Ragauskas, Arthur J" uniqKey="Ragauskas A" first="Arthur J" last="Ragauskas">Arthur J. Ragauskas</name><name sortKey="Ragauskas, Arthur J" sort="Ragauskas, Arthur J" uniqKey="Ragauskas A" first="Arthur J" last="Ragauskas">Arthur J. Ragauskas</name><name sortKey="Studer, Michael" sort="Studer, Michael" uniqKey="Studer M" first="Michael" last="Studer">Michael Studer</name><name sortKey="Studer, Michael" sort="Studer, Michael" uniqKey="Studer M" first="Michael" last="Studer">Michael Studer</name><name sortKey="Wyman, Charles E" sort="Wyman, Charles E" uniqKey="Wyman C" first="Charles E" last="Wyman">Charles E. Wyman</name><name sortKey="Wyman, Charles E" sort="Wyman, Charles E" uniqKey="Wyman C" first="Charles E" last="Wyman">Charles E. Wyman</name></country><country name="République populaire de Chine"><region name="Fujian"><name sortKey="Cao, Shilin" sort="Cao, Shilin" uniqKey="Cao S" first="Shilin" last="Cao">Shilin Cao</name></region></country><country name="Suisse"><region name="Canton de Berne"><name sortKey="Studer, Michael" sort="Studer, Michael" uniqKey="Studer M" first="Michael" last="Studer">Michael Studer</name></region></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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