فهرس المقالات Silica vanadic acid (SVA) حرية الوصول المقاله صفحة الملخص نص كامل 1 - Application of silica vanadic acid as a dual Lewis and Bronsted acid catalytic ability in Dakin West reaction Malihe Safaiee Mohammad Ali Zolfigol Fatemeh Derakhshan-Panah Mohammad Mokhlesi