List of Articles Open Access Article Abstract Page Full-Text 1 - Synthesis and characterization of a porous acidic polymer containing pendant pyrazine moieties based on calix[4]resorcinarene: A green and retrievable solid acid catalyst for preparation of benzimidazole heterosystems Somayeh elahi Hamid Derispour Open Access Article Abstract Page Full-Text 2 - A New Perspective on the Design, Synthesis, and Applications of Co(NO₃)₂·6H₂O in Enhancing Catalyst Performance Reyhaneh Sezari