Fatoni, A.; Hariani, P. L.; Hermansyah, H.; Lesbani, A. A Adsorbent of Chitosan Linked by Methylene Bridge and Schiff Base of 4,4-Diaminodiphenyl Ether –vanillin : Synthesis, Characterization and Its Application After Reacted by Zn(II) Ion As Antibacterial Agent. sci. technol. indones. 2018, 3, 173-177.