Jan 7, 2010

Bioconversion of Hemicellulose

Lignocellulose, the major component of biomass, makes up about half of the matter produced by photosynthesis. It consists of three types of polymers – cellulose, hemicellulose, and lignin – that are strongly intermeshed and chemically bonded by non-covalent forces and by covalent cross-linkages. The chemistry of cellulose can be dated back to 1838 when it was believed that the cell wall of plants is not made of one uniform chemical substance but peculiar to each species. But the subsequent works,


1. Introduction
1.1. Plant cell wall
2. Chemistry of Cellulose
2.1. Introduction
2.2. Structure of Cellulose
3. Chemistry of Hemicellulose
3.1. Introduction
3.2. Holocellulose
3.3. Structure of Hemicellulose
3.3.1. Hardwood Hemicelluloses
3.3.2. Softwood Hemicelluloses
3.4. Composition of Hemicellulose in various feedstocks
3.4.1. Xylans & Mannans
4. Hydrolysis of Hemicellulose
5. Bioconversion of Hemicellulose
5.1. Introduction
5.2. Bioconversion by Enzymatic Hydrolysis
5.2.1. Hemicellulase
5.3. Bioconversion by Microbial Organisms
5.3.1. Introduction
5.3.2. Fermentation by Fungi
5.3.3. Fermentation by Bacteria
5.4. Synergic activities between enzymes
6. Effect of pre-treatment
7. Comparison of various methods
8. Conclusion
9. Reference



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