2016
DOI: 10.1016/j.carbpol.2016.04.069
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Hydrolyzability of xylan after adsorption on cellulose: Exploration of xylan limitation on enzymatic hydrolysis of cellulose

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Cited by 13 publications
(10 citation statements)
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“…On the other hand, removal of substitutions from xylan and glucomannan polymers that are not directly associated with cellulose microfibrils may decrease their solubility in water and lead to the adsorption of linear, unsubstituted hemicellulose fragments onto cellulose fibers [165,195,379]. While these hemicelluloses can be removed by xylanases and mannanases, they will limit cellulose accessibility [379,380]. In addition to acting on hemicelluloses, acetyl esterases may also act on lignin and change its properties [265], but the implications of this effect, and of the effects of deacetylating enzymes in general remain to be studied.…”
Section: Hemicellulolytic Enzymesmentioning
confidence: 99%
“…On the other hand, removal of substitutions from xylan and glucomannan polymers that are not directly associated with cellulose microfibrils may decrease their solubility in water and lead to the adsorption of linear, unsubstituted hemicellulose fragments onto cellulose fibers [165,195,379]. While these hemicelluloses can be removed by xylanases and mannanases, they will limit cellulose accessibility [379,380]. In addition to acting on hemicelluloses, acetyl esterases may also act on lignin and change its properties [265], but the implications of this effect, and of the effects of deacetylating enzymes in general remain to be studied.…”
Section: Hemicellulolytic Enzymesmentioning
confidence: 99%
“…Despite of partial degradation of hemicellulose in the rst stage, the remained hemicelluloses in the residue still had an unfavorable effect on glucose enzymatic hydrolysis, leading to the decrease of glucose yield. 34,35 A subsequent dilute hydrochloric acid pretreatment was designed to eliminate this negative effect. Aer that process, the compact structure of biomass was broken, exposing the active sites of cellulose, increasing accessible surface area and making the enzymatic hydrolysis more effective.…”
Section: Introductionmentioning
confidence: 99%
“…Além do grau de substituição das xilanas, a extração depende da temperatura, agitação e alcalinidade do meio reacional (PENG et al, 2012). Não obstante, esses efeitos não foram (WANG et al, 2016;.…”
Section: Fenóis Solubilizados Dos Materiais Tratados Com Xilanaseunclassified
“…Contudo, os materiais extraídos (BET e BEE) apresentaram baixos teores de xilana e um padrão de substituição menor que o bagaço QTM10%, não justificando a presença, nos coquetéis usados para a sacarificação, de um conjunto de hemicelulases com diferentes especificidades. Por outra parte, a diminuição no grau de substituição poderia estar limitando a hidrólise das xilanas devido a uma maior interação com a celuloseWANG et al, 2016). Uma terceira hipótese para explicar as diferenças entre as velocidades de conversão da celulose e xilana, seria que, pela interação, a celulose limite a hidrólise da hemicelulose.…”
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