Sodium alginate (Mw 22 kDa), and chitosan (Mw 20 kDa) were
purchased from Acros (USA). 1-Ethyl-3-(-3-dimethylaminopropyl)
carbodiimide hydrochloride (EDC), fluorescein isothiocynate
(FITC), rhodamine B isothiocynate (RITC), glycerol, ethanol, and
acetic acid were obtained from Sigma, USA.