PRODUCTION OF WATER-SOLUBLE DERIVATIVES OF CHITOSAN EXTRACTED FROM SHRIMP SHELLS BY MILLARD REACTIONS AND STUDY ITS ANTIOXIDANT PROPERTIES

Abstract

Chitosan was obtained from shrimp shells, commercially known asJambu, by removing the acetyl groups from chitin. The water soluble chitosanderivatives prepared by millard reaction of chitosan with five types of reducingsugars(glucose, galactose, maltose, lactose and fructose) for (1-7) hours at 100˚c,antioxidant activity of derivatives was study the highest activity(G 100-7)followed by derivatives(Ga 100-7, L 100-7 , M 100-7 and F 100-7) hours when themaximum reached (82.70,80.50, 77.50, 75.30 and 71.30%), respectively, after 7hours of reaction, while increasing the reducing power over time gave(G100-7)hours a higher absorption followed by Ga100-7, L100-7, M100-7 and F100-7)hours were observed at 1.201, 1.000, 0.780,0.703, and 0.525 respectively. TheChitosan derivatives derived from Millard reactions differed with the differentsugars type in the hydroxyl radical scavenging and gave the derivative (G100-7)highest scavenging rate reaching 88.80%.