کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1384712 1500604 2016 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Tissue specific response of Miscanthus × giganteus to dilute acid pretreatment for enhancing cellulose digestibility
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
پیش نمایش صفحه اول مقاله
Tissue specific response of Miscanthus × giganteus to dilute acid pretreatment for enhancing cellulose digestibility
چکیده انگلیسی


• DAP induced separation of cell walls in pith but not in rind.
• The distribution of lignin droplets size differed from treated rind and pith.
• Cellulose crystallinity was not a major factor affecting cellulose digestibility.
• The changes of components distribution in rind and pith is cell type-dependent.

The recalcitrance in grasses varies according to cell type and tissue. In this study, dilute acid pretreatment was performed on Miscanthus × giganteus internodes that include rind and pith regions which showing heterogeneous structural and chemical changes. Pretreatment on pith effectively hydrolyzed 73.33% hemicelluloses and separated cohesive cell walls from the compound middle lamella due to lignin migration. Lignin droplets with an average diameter of 49.5 ± 29.3 nm were concurrently coalesced on wall surface, that in turn exposed more microfibrils deep in walls to be enzymatically hydrolyzed reaching 82.55%. By contrast, the rind with a relatively intergrated cell structure was covered by larger lignin droplets (101.2 ± 44.1 nm) and filled with inaccessible microfibrils limiting enzymatic sacchrification (31.50%). Taken together, the cellulose digestibility of biomass was not majorly influenced by cellulose crystallinity, while it was strongly correlated with the positive effects of hemicelluloses degradation, lignin redistribution, cellulose exposure and loosening cell wall structure.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Carbohydrate Polymers - Volume 154, 10 December 2016, Pages 247–256
نویسندگان
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