Different spectral techniques used to identify the state of wood - PowerPoint PPT Presentation

Feb 27, 2024 •152 likes •200 views

Different spectral techniques used to identify the state of wood degradation by soft rot fungi Maria-Cristina Popescu 1 , Petronela Gradinariu 2 , Carmen-Mihaela Popescu 1 1 P. Poni Institute of Macromolecular Chemistry of Romanian Academy,

Different spectral techniques used to identify the state of wood degradation by soft rot fungi Maria-Cristina Popescu 1 , Petronela Gradinariu 2 , Carmen-Mihaela Popescu 1 1 “P. Poni ” Institute of Macromolecular Chemistry of Romanian Academy, Iasi, Romania, 2 Biological Research Institute, Iasi, Romania
Evaluation of the structural modifications in lime wood appearing in time during exposure to soft rot fungus
Lime wood blocks (50 × 50 × 3 mm) The samples were exposed to C. globosum for 133 days. Methods: CP/MAS 13 C-NMR Spectroscopy, IR and 2D IR Correlation Spectroscopy  The results indicate an enzymatic oxidation and hydrolysis reactions on hemicelluloses and cellulose, resulting oligomers and oxidized structures. Finally small fragments containing carboxyl or carbonyl groups are formed, which are lost or remain in wood structures.  A preferential depletion of carbohydrates, with partial delignification and splitting of the lignin/carbohydrate association, was also observed.
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