Effect of ultrasonic treatment on the molecular weight of carboxymethylated chitin–glucan complex from Aspergillus niger

Different factors affecting the efficiency of the ultrasonic depolymerization of the high-molecular-weight carboxymethylated chitin–glucan prepared from the fungal mycelium of Aspergillus niger have been investigated. The influence of the following parameters was examined: concentration of the chiti...

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Bibliographic Details
Published in:Ultrasonics sonochemistry 1999, Vol.5 (4), p.169-172
Main Authors: Machová, E., Kvapilová, K., Kogan, G., Šandula, J.
Format: Article
Language:English
Subjects:
Applied sciences
Aspergillus niger
Aspergillus niger - chemistry
Chitin - chemistry
Chitin–glucan
Chromatography, High Pressure Liquid
Depolymerization
Exact sciences and technology
Glucans - chemistry
Molecular Weight
Natural polymers
Physicochemistry of polymers
Starch and polysaccharides
Ultrasonication
Ultrasonics
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Summary:Different factors affecting the efficiency of the ultrasonic depolymerization of the high-molecular-weight carboxymethylated chitin–glucan prepared from the fungal mycelium of Aspergillus niger have been investigated. The influence of the following parameters was examined: concentration of the chitin–glucan complex, duration of ultrasonic irradiation, reaction temperature and volume of the ultrasonicated solution. The optimized conditions for the efficient ultrasonic depolymerization include: polysaccharide concentration – 0.2 mg ml −1; volume of the sonicated solution – 25 ml; duration of the sonication – 10 min; and constant cooling of the sonicated sample in an ice–water bath.
ISSN:1350-4177
1873-2828
DOI:10.1016/S1350-4177(98)00045-5