i want to purchase chitosan of low molecular weight so please can anybody know source of same.
Sigma carries a chitosan oligosaccharide lactate of ~ 5kDa and polysciences has chitosan of 15kDa.
http://www.sigmaaldrich.com/catalog/product/aldrich/523682?lang=en®ion=US
http://www.polysciences.com/default/chitosan-purified-powder-mw-15000
You can obtain different molecular chitosan by the method of acetic acid hydrolysis of chitosan. Low molecule chitosan could be prepared by controling the time of hydrolysis. You might refer to the following papers.
Chen, X. G., Zheng, L., Wang, Z., Lee, C. Y., & Park, H. J. (2002).
Molecular affinity and permeability of different molecular weight
chitosan membranes. Journal of Agricultural and Food Chemistry, 50,
5915–5918.
Article Effect of molecular weight and degree of chitosan deacetylat...
i need 300 KDa chitosan ...how can i extract it from shrimps, crabs shells?
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