Low molecular weight chitosans--preparation by depolymerization with Aspergillus niger pectinase, and characterization.
IR@CFTRI: CSIR-Central Food Technological Research Institute, Mysore
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http://ir.cftri.com/2065/
CR-05-03 |
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| Title |
Low molecular weight chitosans--preparation by depolymerization with Aspergillus niger pectinase, and characterization.
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| Creator |
Kittur, Farooqahamed S
Vishu Kumar, Acharya B Tharanathan, R. N. |
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| Subject |
28 Meat, Fish & Poultry
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| Description |
The viscosity of a chitosan solution was rapidly lowered in the presence of pectinase from Aspergillus niger at pH 3.0 and 37 degrees C. The low molecular weight chitosans (LMWC) had a molecular weight in the range 20,000-5000 Da. Circular dichroism spectra showed a decrease in the segment of acetylated glucosamine units, whereas X-ray diffraction and CP-MAS 13C NMR indicated higher crystallinity and polymorphism in LMWC. The latter on thermal drying resulted in structural alterations, and yielded an insoluble product. FT-IR and X-ray diffraction showed no evidence of either Schiff's base linkage or any annealed polymorph. CP-MAS 13C NMR showed marked changes in the chain conformations of LMWC, which are believed to be responsible for its loss of solubility and functionality.
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| Date |
2003
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Language |
en
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| Rights |
—
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| Identifier |
http://ir.cftri.com/2065/1/Carbohydrate_Research_338_%282003%29_1283-1290.pdf
Kittur, Farooqahamed S and Vishu Kumar, Acharya B and Tharanathan, R. N. (2003) Low molecular weight chitosans--preparation by depolymerization with Aspergillus niger pectinase, and characterization. Carbohydrate research, 338 (12). pp. 1283-90. ISSN 0008-6215 |
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