"Correlation Of Langmuir Isotherm, Optical, Surface Potential And Morphological Characterizations Of Two Functionalized Dihydroxycalix[4]arene For Lead Cation Entrapment"
By Assoc. Prof. Dr. Faridah Lisa Supian

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1 Comment from Dr. Noorshida Binti Mohd Ali Instead of surface potential results, is there any other analyses methods that will be done in future to support or prove that the Pb2+ ion trapped into the host C-DHC4 exactly at the lower rim part.
2 Comment from Prof. Madya Ts. Dr. Che Nor Aiza Jaafar Two type of clix[4[arenes were used in this study i.e C-DHC4 and N-DHC4 with difference functional groups. However the SEM results reveals that the structure of N-DHC4 is irregular dan not well arrange as compared to C-DHC4. My question is how to confirm the lower performance of N-DHC4 is actually due to different functional groups NOT because of imperfect structure.