Biosynthesis of Silver Nanoparticles Enhanced Antibacterial Silk Face Covering oleh Phannaphat Phromphen, Udomlak Sukatta, Prapassorn Rugthaworn, Jirachaya Boonyarit, Phitalai Phoophat, Nattadon Rungruangkitkrai, Pawarin Tuntariyanond, Nawarat Chartvivatpornchai, Thanyachol Apipatpapha, Rungsima Chollakup