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Type: Artigo de periódico
Title: Biomass Photochemistry Xiv: Photosensitized Pre-treatment Of Cellulose And Its Role On Cellulase Efficiency
Author: Duran N.
Gomez E.
Haun M.
Abstract: α-Cellulose, methylcellulose and filter paper (Whatman No. 1) were irradiated with UV light at λ > 254 nm and λ > 300 nm in the presence of sodium nitrite as sensitizer. The degradation of cellulose derivatives was monitored by viscosity, weight loss and thermogravimetric measurements. For the samples irradiated at λ > 254 nm and λ > 300 nm in the presence of the sensitizer, the intrinsic viscosities were similar for fluences in the range 0 - 64 kJ m-2. The sensitizer, which generates OH{radical dot} radicals through photochemical activation, improves tenfold the efficiency of the enzymatic hydrolysis of a-cellulose by cellulase. The results clearly indicate that irradiation at λ > 300 nm is a good pre-treatment for the enzymatic hydrolysis of α-cellulose. © 1990.
Rights: fechado
Identifier DOI: 10.1016/1010-6030(90)87080-U
Date Issue: 1990
Appears in Collections:Unicamp - Artigos e Outros Documentos

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