Fig. 2From: Sustainable microbial cell nanofactory for zinc oxide nanoparticles production by zinc-tolerant probiotic Lactobacillus plantarum strain TA4Agar well diffusion method to determine the MTC of LAB strains against various Zn2+ concentrations a zinc-tolerant strain [Left], less zinc-tolerant strain [Right]. Microbial growth of LAB strains in various Zn2+ concentrations by using tube dilution method (b). Data are expressed as mean (n = 3) ± SDBack to article page