فهرس المقالات CrO3 حرية الوصول المقاله صفحة الملخص نص كامل 1 - Rice husk ash (RHA): A Highly efficient solid acid catalyst for the oxidation of alcohols and trimethylsilyl, tetrahydropyranyl and methoxymethyl ethers with CrO3 Farhad Shirini Masoumeh Abedini Mahnaz Shamsi-Sani Mohadeseh Seddighi حرية الوصول المقاله صفحة الملخص نص كامل 2 - Rapid oxidation of alcohols and trimethylsilyl and tetrahydropyranyl ethers with CrO3 in the presence of sulfonic acid functionalized ordered nanoporous Na+-montmorillonite Farhad Shirini Masoumeh Abedini Ahmad Nasiri Abkenar Bita Baghernejad