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Effects of seven metal oxide NPs suspensions on (a) root elongation and (b) shoot elongation of maize at the concentration of 2000 mg·L−1. Effects of seven metal oxide NPs suspensions on (c) root elongation and (d) shoot elongation rice at the concentration of 2000 mg·L−1. The values were given as mean ± SD (standard deviation) of triplicate samples.
