Comparison of Physicochemical, Binding, and Antibacterial Properties of Chitosans Prepared without and with Deproteinization Process

Physicochemical, binding, and antibacterial properties of chitosans prepared without and with deproteinization (DP) process (5, 10, 15, and 30 min at 15 psi/121 °C) were compared. Chitosan from DP 0 min had comparable nitrogen content, lower degree of deacetylation and solubility, but higher molecul...

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Veröffentlicht in:Journal of agricultural and food chemistry 2003-12, Vol.51 (26), p.7659-7663
Hauptverfasser: No, Hong Kyoon, Lee, Shin Ho, Park, Na Young, Meyers, Samuel P
Format: Artikel
Sprache:eng
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Zusammenfassung:Physicochemical, binding, and antibacterial properties of chitosans prepared without and with deproteinization (DP) process (5, 10, 15, and 30 min at 15 psi/121 °C) were compared. Chitosan from DP 0 min had comparable nitrogen content, lower degree of deacetylation and solubility, but higher molecular weight and viscosity than chitosans from DP 5−30 min. The latter four chitosans showed differences only in molecular weight. Deproteinization treatment resulted in slightly decreased L* values and increased a* and b* values compared with those of DP 0 min. Chitosan from DP 0 min had comparable water and fat-binding capacity (FBC) except for chitosan from DP 15 min, which had a higher FBC but lower dye-binding capacity than those of the four chitosans from DP 5−30 min. The antibacterial activities of chitosans against seven different bacteria showed that the inhibitory effects varied with the deproteinization time and the particular bacterium. Keywords: Chitosan; deproteinization; physicochemical characteristics; binding capacity; antibacterial activity
ISSN:0021-8561
1520-5118
DOI:10.1021/jf030226w