主题词：Synthesis and biological activity; Multicomponent Synthesis of Heterocycles; Inorganic and Organometallic Chemistry; Electrochemical sensors and biosensors; Analytical Chemistry and Chromatography; Electrochemical Analysis and Applications; Synthesis and Characterization of Heterocyclic Compounds; Analytical Chemistry and Sensors; Water Quality Monitoring and Analysis; Computational Drug Discovery Methods; Nonlinear Optical Materials Research; Various Chemistry Research Topics; Biodiesel Production and Applications; Analytical Methods in Pharmaceuticals; Conducting polymers and applications; Chemistry and Chemical Engineering; Chemistry Education and Research; Adsorption and biosorption for pollutant removal; Advanced Chemical Sensor Technologies; Metal complexes synthesis and properties; Biofuel production and bioconversion; Lichen and fungal ecology; Phytochemistry Medicinal Plant Applications; Science Education and Pedagogy; Spectroscopy and Chemometric Analyses