| Abstract
| - Physicochemical, binding, and antibacterial properties of chitosans prepared without and withdeproteinization (DP) process (5, 10, 15, and 30 min at 15 psi/121 °C) were compared. Chitosanfrom DP 0 min had comparable nitrogen content, lower degree of deacetylation and solubility, buthigher molecular weight and viscosity than chitosans from DP 5−30 min. The latter four chitosansshowed differences only in molecular weight. Deproteinization treatment resulted in slightly decreasedL* values and increased a* and b* values compared with those of DP 0 min. Chitosan from DP 0 minhad comparable water and fat-binding capacity (FBC) except for chitosan from DP 15 min, whichhad a higher FBC but lower dye-binding capacity than those of the four chitosans from DP 5−30min. The antibacterial activities of chitosans against seven different bacteria showed that the inhibitoryeffects varied with the deproteinization time and the particular bacterium. Keywords: Chitosan; deproteinization; physicochemical characteristics; binding capacity; antibacterialactivity
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