Fig. 7From: Impact of metal oxide nanoparticles on cotton (Gossypium hirsutum L.): a physiological perspectiveEffects of SiO2 NPs concentrations on the protein concentrations (a); CAT activity (b); POD activity (c); and SOD activity (d) of cotton plants. Image reproduced from Nhan et al. (2014) under a Creative Commons Attribution 4.0 International LicenseBack to article page