Synthesis and Characterization of Green Zinc Oxide Nanoparticles with Antiproliferative Effects through Apoptosis Induction and MicroRNA Modulation in Breast Cancer Cells

Table 5

The nonlinear regression sigmoidal dose-response curve calculated EC₅₀ with logarithmic and nonlogarithmic concentrations for ABTS and DPPH free radicals.

	DPPH	ABTS
EC50	57.19 μg/mL (95% CI: 46.06–71.20)	31.5 μg/mL (95% CI: 26.71–37.16)
Log EC50	1.757 μg/mL (95% CI: 1.663–1.852)	1.498 μg/mL (95% CI: 1.427–1.570)
Hill slope	0.6666	0.7235
R-squared (R^2)	0.9384	0.965

Abbreviations: EC₅₀: the half-maximal effective concentration, log: logarithm, DPPH: 2,2-diphenyl-1-picrylhydrazyl, ABTS: 2, 2′-azino-bis (3-ethylbenzothiazoline-6-sulfonic acid), and CI: confidence interval.