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 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.
No
Hong Kyoon
HK
Department of Food Science and Technology, Catholic University of Daegu, Hayang 712-702, South Korea. khno@cu.ac.kr
Lee
Shin Ho
SH
Park
Na Young
NY
Meyers
Samuel P
SP
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
D000900:Anti-Bacterial Agents; D011506:Proteins; D002686:Chitin; D048271:Chitosan; D009584:Nitrogen