title: Comparison of physicochemical, binding, and antibacterial properties of chitosans prepared without and with deproteinization process.
abstract: Physicochemical, binding, and antibacterial properties of chitosans prepared without and with deproteinization (DP) process (5, 10, 15, and 30 min at 15 psi/121 degrees 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.
authors.affiliation: Department of Food Science and Technology, Catholic University of Daegu, Hayang 712-702, South Korea. khno@cu.ac.kr
authors.forename: Hong Kyoon
authors.initials: HK
authors.lastname: No
authors.forename: Shin Ho
authors.initials: SH
authors.lastname: Lee
authors.forename: Na Young
authors.initials: NY
authors.lastname: Park
authors.forename: Samuel P
authors.initials: SP
authors.lastname: Meyers
mesh_terms: D000107:Acetylation; D000818:Animals; D000900:Anti-Bacterial Agents / Q000494:pharmacology*; D003386:Brachyura / Q000737:chemistry; D055598:Chemical Phenomena; D002627:Chemistry, Physical; D002686:Chitin / Q000031:analogs & derivatives* / Q000737:chemistry* / Q000378:metabolism / Q000494:pharmacology; D048271:Chitosan; D008970:Molecular Weight; D009584:Nitrogen / Q000032:analysis; D011506:Proteins / Q000032:analysis*; D012995:Solubility; D014783:Viscosity
chemical_list: D000900:Anti-Bacterial Agents; D011506:Proteins; D002686:Chitin; D048271:Chitosan; D009584:Nitrogen