主题词：Multicomponent Synthesis of Heterocycles; Chemical Synthesis and Reactions; Synthesis and biological activity; Nanoparticles: synthesis and applications; Chemistry and Chemical Engineering; Synthesis and Biological Evaluation; Corrosion Behavior and Inhibition; Microwave-Assisted Synthesis and Applications; Concrete Corrosion and Durability; Chemical Synthesis and Analysis; Sulfur-Based Synthesis Techniques; Ionic liquids properties and applications; Adsorption and biosorption for pollutant removal; Enzyme Catalysis and Immobilization; Oxidative Organic Chemistry Reactions; Various Chemistry Research Topics; Hydrogen embrittlement and corrosion behaviors in metals; Synthesis and Characterization of Heterocyclic Compounds; Nanomaterials for catalytic reactions; Catalysis for Biomass Conversion; Catalytic Cross-Coupling Reactions; Analytical Chemistry and Chromatography; Synthesis of Organic Compounds; Phenothiazines and Benzothiazines Synthesis and Activities; Advanced Photocatalysis Techniques