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Effects on Lignin Redistribution in Eucalyptus globulus Fibres Pre-Treated by Steam Explosion: A Microscale Study to Cellulose Accessibility
The objective of this study was to investigate structural changes and lignin redistribution in Eucalyptus globulus pre-treated by steam explosion under different degrees of severity (S(0)), in order to evaluate their effect on cellulose accessibility by enzymatic hydrolysis. Approximately 87.7% to 9...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8066282/ https://www.ncbi.nlm.nih.gov/pubmed/33805256 http://dx.doi.org/10.3390/biom11040507 |
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author | Troncoso-Ortega, Eduardo Castillo, Rosario del P. Reyes-Contreras, Pablo Castaño-Rivera, Patricia Teixeira Mendonça, Regis Schiappacasse, Nicolás Parra, Carolina |
author_facet | Troncoso-Ortega, Eduardo Castillo, Rosario del P. Reyes-Contreras, Pablo Castaño-Rivera, Patricia Teixeira Mendonça, Regis Schiappacasse, Nicolás Parra, Carolina |
author_sort | Troncoso-Ortega, Eduardo |
collection | PubMed |
description | The objective of this study was to investigate structural changes and lignin redistribution in Eucalyptus globulus pre-treated by steam explosion under different degrees of severity (S(0)), in order to evaluate their effect on cellulose accessibility by enzymatic hydrolysis. Approximately 87.7% to 98.5% of original glucans were retained in the pre-treated material. Glucose yields after the enzymatic hydrolysis of pre-treated material improved from 19.4% to 85.1% when S(0) was increased from 8.53 to 10.42. One of the main reasons for the increase in glucose yield was the redistribution of lignin as micro-particles were deposited on the surface and interior of the fibre cell wall. This information was confirmed by laser scanning confocal fluorescence and FT-IR imaging; these microscopic techniques show changes in the physical and chemical characteristics of pre-treated fibres. In addition, the results allowed the construction of an explanatory model for microscale understanding of the enzymatic accessibility mechanism in the pre-treated lignocellulose. |
format | Online Article Text |
id | pubmed-8066282 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-80662822021-04-25 Effects on Lignin Redistribution in Eucalyptus globulus Fibres Pre-Treated by Steam Explosion: A Microscale Study to Cellulose Accessibility Troncoso-Ortega, Eduardo Castillo, Rosario del P. Reyes-Contreras, Pablo Castaño-Rivera, Patricia Teixeira Mendonça, Regis Schiappacasse, Nicolás Parra, Carolina Biomolecules Article The objective of this study was to investigate structural changes and lignin redistribution in Eucalyptus globulus pre-treated by steam explosion under different degrees of severity (S(0)), in order to evaluate their effect on cellulose accessibility by enzymatic hydrolysis. Approximately 87.7% to 98.5% of original glucans were retained in the pre-treated material. Glucose yields after the enzymatic hydrolysis of pre-treated material improved from 19.4% to 85.1% when S(0) was increased from 8.53 to 10.42. One of the main reasons for the increase in glucose yield was the redistribution of lignin as micro-particles were deposited on the surface and interior of the fibre cell wall. This information was confirmed by laser scanning confocal fluorescence and FT-IR imaging; these microscopic techniques show changes in the physical and chemical characteristics of pre-treated fibres. In addition, the results allowed the construction of an explanatory model for microscale understanding of the enzymatic accessibility mechanism in the pre-treated lignocellulose. MDPI 2021-03-29 /pmc/articles/PMC8066282/ /pubmed/33805256 http://dx.doi.org/10.3390/biom11040507 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) ). |
spellingShingle | Article Troncoso-Ortega, Eduardo Castillo, Rosario del P. Reyes-Contreras, Pablo Castaño-Rivera, Patricia Teixeira Mendonça, Regis Schiappacasse, Nicolás Parra, Carolina Effects on Lignin Redistribution in Eucalyptus globulus Fibres Pre-Treated by Steam Explosion: A Microscale Study to Cellulose Accessibility |
title | Effects on Lignin Redistribution in Eucalyptus globulus Fibres Pre-Treated by Steam Explosion: A Microscale Study to Cellulose Accessibility |
title_full | Effects on Lignin Redistribution in Eucalyptus globulus Fibres Pre-Treated by Steam Explosion: A Microscale Study to Cellulose Accessibility |
title_fullStr | Effects on Lignin Redistribution in Eucalyptus globulus Fibres Pre-Treated by Steam Explosion: A Microscale Study to Cellulose Accessibility |
title_full_unstemmed | Effects on Lignin Redistribution in Eucalyptus globulus Fibres Pre-Treated by Steam Explosion: A Microscale Study to Cellulose Accessibility |
title_short | Effects on Lignin Redistribution in Eucalyptus globulus Fibres Pre-Treated by Steam Explosion: A Microscale Study to Cellulose Accessibility |
title_sort | effects on lignin redistribution in eucalyptus globulus fibres pre-treated by steam explosion: a microscale study to cellulose accessibility |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8066282/ https://www.ncbi.nlm.nih.gov/pubmed/33805256 http://dx.doi.org/10.3390/biom11040507 |
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