List of Articles BaO Open Access Article Abstract Page Full-Text 1 - Design and Analyses of a PWM based Seven Level CascadeCombination Inverter Mortaza Sefidi Mehdi Jarahi Open Access Article Abstract Page Full-Text 2 - BaO/TiO2-ZrO2 as a green and efficient basic catalyst for Knoevenagel condensation reaction Roozbeh Kalbasi Zohreh Shahzeidi Farzad Zamani