All chitosans and chitosan oligomers were powder forms and prepared from crab shell, except for chitosan 4 from shrimp shell. These were placed separately in plastic bottles and stored at ambient temperature during the experiments
All chitosans and chitosan oligomerswere powder forms and prepared from crab shell,except for chitosan 4 from shrimp shell. These wereplaced separately in plastic bottles and stored atambient temperature during the experiments