Investigation of some locally water-soluble natural polymers as circulation loss control agents during oil fields drilling Utility of 4-(isatin-3-ylideneamino) benzohydrazide in the synthesis of bioactive N-heterocyclic compounds. Investigation of some copolymers based on acrylic salts as circulation loss control agents Activated polymers. II: Synthesis and exchange reactions of biologically active poly (8-acryloxyquinoline) Synthesis, characterization and morphology of polyantharanilic acid micro- and nanostructures Synthesis, exchange reactions, and biological activity of poly (8‐methacryloxyquinoline) Thermal Behavior of 8-methacryloxy-quinoline-Acrylonitrile Copolymers