6162490634565-Chitin-and-Chitosan-ppt.pptx

Chitin

1. Chitin and Chitosan

2. Chitin and Cellulose Chitin and cellulose are natural polysaccharides. Cellulose is a polymer of β -D-glucose unit linked with β -(1-4) glycoside linkage. Chitin is a polymer of N-acetyl β -D- glucosamine unit linked with β -(1-4) glycoside linkage. N-acetyl β -D- glucosamine is β -D-glucose with OH group at C no 2 replaced with acetamido group. Chitin can be isolated from shell of crabs, crustaceas .

3. Chitin and Cellulose

4. Chitin and cellulose

5. Chitin

6. Chitosan Chitosan is polymer of β -D-glucosamine linked with β (1-4)- glycoside linkage. It is produced by chitin deacetylation process. N-deacetylation of chitin to chitosan is achieved by treating with 50% NaOH

7. Chitosan