Novel composite of nano zinc oxide and nano propolis as antibiotic for antibiotic-resistant bacteria: a promising approach oleh Shaimaa Atalla Salama, Doaa Essam, Aya I. Tagyan, Ahmed A. Farghali, Ensaf M. Khalil, Yasser F. Abdelaleim, Wael N. Hozzein, Mohammed Mubarak, Fahd A. Nasr, Abdullah A. Eweis, Mohammed Al-Zharani, Rehab Mahmoud