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| Author(s): |
Cristiane Ribeiro de Sousa
Total Authors: 1
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| Document type: | Master's Dissertation |
| Press: | São Paulo. |
| Institution: | Universidade de São Paulo (USP). Instituto de Ciências Biomédicas (ICB/SDI) |
| Defense date: | 2011-10-26 |
| Examining board members: |
Marcos Silveira Buckeridge;
Jose Geraldo da Cruz Pradella;
Marco Aurélio Silva Tiné
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| Advisor: | Marcos Silveira Buckeridge |
| Abstract | |
The sugarcane straw cellulosic ethanol can increase bioethanol production, but the straw is usually degraded in the field. However, the process that leads the cell wall disassembly under field conditions is unknown and understanding how this happens can improve cellulosic ethanol production. In the present work we aimed at studying how sugarcane straw is degraded in the field during a year. Cell wall composition was determined by fractioning and determination of monosaccharide composition. Results showed a decrease (ca.26%) in cellulose content and an increase of 13% in high solubility hemicelluloses fraction. Changes in monosaccharide composition showed that the first polymer to be solubilised is the arabinoxylan (AX) (after 3 months) followed by <font face=\"Symbol\">b-glucans and cellulose (after 6 months). This suggests that AX is the most exposed hemicelullose and its solubilisation allowed cellulose degradation after 6 months. Our data suggest the use of xylanases followed by glucanases as an enzyme order to be used in cellulosic ethanol production from sugarcane straw. (AU) | |
| FAPESP's process: | 09/04041-8 - Characterization of Sugarcane Waste Cell Wall Degradation on the Field |
| Grantee: | Cristiane Ribeiro de Sousa |
| Support Opportunities: | Scholarships in Brazil - Master |