Combined ultrasound-laccase assisted bleaching of cotton
| Autor: | Tzanko Tzanov, Carlos Basto, Artur Cavaco-Paulo |
|---|---|
| Přispěvatelé: | Universidade do Minho |
| Jazyk: | angličtina |
| Rok vydání: | 2007 |
| Předmět: |
0106 biological sciences
Acoustics and Ultrasonics Diffusion Cotton 01 natural sciences Polyvinyl alcohol Sonochemistry Inorganic Chemistry chemistry.chemical_compound 0404 agricultural biotechnology 010608 biotechnology Ultrasound Chemical Engineering (miscellaneous) Environmental Chemistry Radiology Nuclear Medicine and imaging Laccase Science & Technology biology business.industry Chemistry Organic Chemistry Substrate (chemistry) 04 agricultural and veterinary sciences 040401 food science Enzyme assay 3. Good health biology.protein Bleaching business Stabilizer (chemistry) Nuclear chemistry |
| Zdroj: | Repositório Científico de Acesso Aberto de Portugal Repositório Científico de Acesso Aberto de Portugal (RCAAP) instacron:RCAAP |
| Popis: | This study evaluates the potential of using ultrasound to enhance the bleaching efficiency of laccase enzyme on cotton fabrics. Ultrasound of low intensity (7 W) and relatively short reaction time (30 min) seems to act in a synergistic way with the enzyme in the oxidation/removal of the natural colouring matter of cotton. The increased bleaching effect could be attributed to improved diffusion of the enzyme from the liquid phase to the fibres surface and throughout the textile structure. On the other hand inactivation of the laccase occurred increasing the intensity of the ultrasound. However, at the ultrasound power applied in the bleaching experiments the loss of enzyme activity was not significant enough to justify the use stabilizer such as polyvinyl alcohol. Furthermore, the polyvinyl alcohol appears to be a substrate for the laccase. Fundação para a Ciência e a Tecnologia (FCT) - SFRH/BD/8651/2002 |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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