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| Registros recuperados : 273 | |
| Registros recuperados : 273 | |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Solos. Para informações adicionais entre em contato com cnps.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Solos. |
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Data corrente: |
02/05/2022 |
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Data da última atualização: |
03/05/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
ESPIRITO SANTO, M. C. do; THEMA, F. T.; PELLEGRINI, V. de O. A.; KANE, A. O.; GUIMARAES, F. E. G.; FILGUEIRAS, J. G.; NOVOTNY, E. H.; AZEVEDO, E. R. de; POLIKARPOV, I. |
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Afiliação: |
MELISSA CRISTINA DO ESPIRITO SANTO, USP; FORCE TEFO THEMA, BOTSWANA UNIVERSITY OF AGRICULTURE AND NATURAL RESOURCES; VANESSA DE OLIVEIRA ARNOLDI PELLEGRINI, USP; AISSATA OUSMANE KANE, USP; FRANCISCO EDUARDO GONTIJO GUIMARAES, USP; JEFFERSON G. FILGUEIRAS, UFF; ETELVINO HENRIQUE NOVOTNY, CNPS; EDUARDO RIBEIRO DE AZEVEDO, USP; IGOR POLIKARPOV, USP. |
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Título: |
When the order matters: impacts of lignin removal and xylan conformation on the physical structure and enzymatic hydrolysis of sugarcane bagasse. |
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Ano de publicação: |
2022 |
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Fonte/Imprenta: |
Industrial Crops and Products, v. 180, 114708, Jun. 2022. |
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DOI: |
https://doi.org/10.1016/j.indcrop.2022.114708 |
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Idioma: |
Inglês |
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Conteúdo: |
Dilute acid and alkaline pretreatments are commonly used to fractionate lignocellulosic biomass for its conversion into biofuels and renewable materials. In the current work, we compare the structure and morphology of one and two-step alkaline and acid pretreated sugarcane bagasse (SCB) and differences in their enzymatic hydrolysis rates and yields. We used physical techniques such as nuclear magnetic resonance (NMR) and X-ray diffraction to shed light on physical and morphological changes introduced by the pretreatments in SCB. We also applied solid state NMR procedures which allowed us to separate xylan structural conformations inside pretreated plant biomass samples. Our results reveal that practically all xylan in two-step "alkaline first" (NaOH 1% + H2SO4 1%) pretreated samples adopts two-fold ribbon-like conformation, tightly associated with crystalline cellulose. On the contrary, a main part of xylan in the SCB samples after "acid first" (H2SO4 1% + NaOH 1%) combined pretreatment has a three-fold screw conformation characteristic of xylan bound to lignin. Modifications in the biomass composition, physical structure and xylan conformation introduced by the alternative pretreatments contribute to the observed differences in the enzymatic hydrolysis rates and yields. These results could be relevant for analysis and optimization of pretreatments and enzymatic hydrolysis of lignocellulosic biomass in general. |
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Palavras-Chave: |
Estrutura física; Hidrólise enzimática; Physical structure; Xilano. |
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Thesagro: |
Bagaço; Biomassa; Cana de Açúcar. |
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Thesaurus NAL: |
Biomass; Enzymatic hydrolysis; Sugarcane bagasse; Xylan. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
LEADER 02554naa a2200361 a 4500
001 2142529
005 2022-05-03
008 2022 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1016/j.indcrop.2022.114708$2DOI
100 1 $aESPIRITO SANTO, M. C. do
245 $aWhen the order matters$bimpacts of lignin removal and xylan conformation on the physical structure and enzymatic hydrolysis of sugarcane bagasse.$h[electronic resource]
260 $c2022
520 $aDilute acid and alkaline pretreatments are commonly used to fractionate lignocellulosic biomass for its conversion into biofuels and renewable materials. In the current work, we compare the structure and morphology of one and two-step alkaline and acid pretreated sugarcane bagasse (SCB) and differences in their enzymatic hydrolysis rates and yields. We used physical techniques such as nuclear magnetic resonance (NMR) and X-ray diffraction to shed light on physical and morphological changes introduced by the pretreatments in SCB. We also applied solid state NMR procedures which allowed us to separate xylan structural conformations inside pretreated plant biomass samples. Our results reveal that practically all xylan in two-step "alkaline first" (NaOH 1% + H2SO4 1%) pretreated samples adopts two-fold ribbon-like conformation, tightly associated with crystalline cellulose. On the contrary, a main part of xylan in the SCB samples after "acid first" (H2SO4 1% + NaOH 1%) combined pretreatment has a three-fold screw conformation characteristic of xylan bound to lignin. Modifications in the biomass composition, physical structure and xylan conformation introduced by the alternative pretreatments contribute to the observed differences in the enzymatic hydrolysis rates and yields. These results could be relevant for analysis and optimization of pretreatments and enzymatic hydrolysis of lignocellulosic biomass in general.
650 $aBiomass
650 $aEnzymatic hydrolysis
650 $aSugarcane bagasse
650 $aXylan
650 $aBagaço
650 $aBiomassa
650 $aCana de Açúcar
653 $aEstrutura física
653 $aHidrólise enzimática
653 $aPhysical structure
653 $aXilano
700 1 $aTHEMA, F. T.
700 1 $aPELLEGRINI, V. de O. A.
700 1 $aKANE, A. O.
700 1 $aGUIMARAES, F. E. G.
700 1 $aFILGUEIRAS, J. G.
700 1 $aNOVOTNY, E. H.
700 1 $aAZEVEDO, E. R. de
700 1 $aPOLIKARPOV, I.
773 $tIndustrial Crops and Products$gv. 180, 114708, Jun. 2022.
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