Fig. 1From: A comparative evaluation of the effects of seed invigoration treatments with precursor zinc salt and nano-sized zinc oxide (ZnO) particles on vegetative growth, grain yield, and quality characteristics of Zea maysElectron microscopy characterization a scanning electron micrograph depicting small-sized aggregates, b transmission electron micrographs of zinc oxide nanoparticles showing spherical shaped nanoparticles, c histogram showing size distribution curveBack to article page