“Copper Nanoparticle Inhibition of Fermentative Hydrogen Yield by Enterobacter Cloacae: Nonlinear Model Discrimination Identifies a Sharp Wang-Type Threshold”. Journal of Environmental Bioremediation and Toxicology, vol. 9, no. 1, July 2026, pp. 8-14, https://doi.org/10.54987/jebat.v9i1.208.