Original Research
        
        
            
        
        
        
Optimization of the Ultrasonic-Assisted Extraction of Phenolic Compounds, Ferric Reducing Activity and Antioxidant Activity of the Beta vulgaris Using Response Surface Methodology
        
        
        Amin Ilghami 1, Saeed Ghanbarzadeh 2،3, Hamed Hamishehkar 3 *