Biosynthesis of silver nanoparticles using nitrate reductase produced by Lactobacillus plantarum CAM 4: characterization and in vitro evaluation of its antimicrobial efficiency af Ren Loi, Hsean, Abbasiliasi, Sahar, Bothi Raja, Pandian, Shamzi Mohamed, Mohd, Tan, Wen-Nee, Suan Ng, Hui, Chi-Wei Lan, John, Shun Tan, Joo