M. U. Onuoha

Effects of Some Additives on the Tensile Strength and Young Modulus of Epoxy Resin

M. U. Onuoha, C. M. Ekwunife, E. E. Okpala & O. J. Okeakpu · Journal of Materials Science Research and Reviews · 2023

Epoxy resin was mixed with bone powder, PMMA and Animal hair at 0%, 0.01%, 0.05%, 0.1%, 0.5%, 1.5% and 5.0% levels. The tensile strength and the modulus were determined using Instron Universal Testing Machine. The results showed that as the filler load increases, modulus increase...

Open access Research Article

Determination of the Mechanism of Nucleophilic Reaction of Fenitrothion Using Substituted Phenoxide Nucleophiles in Aqueous Media

E. G. Amadi, C. I. Egwuatu, C. U. Okoro, F. O. Obumselu & M. U. Onuoha · International Research Journal of Pure and Applied Chemistry · 2021

The mechanism of the nucleophilic displacement reaction at the phosphorus centre of organophosphates was determined. Phenoxide nucleophiles were reacted with fenitrothion (O,O-dimethyl O-(3-methyl-4-nitrophenyl) phosphorothioate) in water at 25oC and pseudo-first order rate const...

Open access Research Article 10.9734/irjpac/2021/v22i630415