Name zahza gheisvandi Affiliation دانشجوی دانشگاه کردستان Degree _ Website Email — JournalPaper Presentation Speech WorkShop Book Innovation GrantAttraction Thesis Festival FinishedProject Sales Art StandardCreation TitleJournal 1 Covalently bonded sulfonic acid onto the surface of magnetic nanosilica obtained from rice husk: CoFe2O4@RH-Pr-SO3H as novel acid catalyst for synthesis of octahydroquinazolinone and 3,4-dihydropyrimidinone JOURNAL OF MOLECULAR STRUCTURE