Two-way multivariate repeated measurements model for between-units factors with two covariates

الملخص EN

Three Schiff bases were synthesized namely (4-dimethyl amino benzaldene–3-amino benzoic acid (piperonaldene – 4-amino – 2-nitro, toluene) and (4-dimethyl amino benzaldene - 4-amino – 2-nitro toluene) .

These Schiff bases have been identified by microanalysis (CHN), infrared, 1H-NMR, 13 C-NMR and GC-Mass spectroscopy.

The study also included the use of these Schiff bases as inhibitors for corrosion of brass in acidic media (0.5 M HCl).

The rate of corrosion was determined by two methods (electrochemical and weight loss methods).

It was found agreement between them.

(Different studies such as ; the effect of temperature on the corrosion rate at 298 °K , 308 °K and 318 °K) , measurement of some thermodynamic parameters (corrosion current , activation energy and free energy) , and comparison of inhibition effect for prepared Schiff bases with their primary amines were achieved .

The results indicated that these Schiff bases inhibited the corrosion efficiently.

Furthermore, antibacterial activity of prepared Schiff bases and standard inhibitor (AK3) was also studied on the two types of bacteria, Staphylococcus aureus and Escherichia coli.

It was found that the.

Schiff bases under study were considered inhibitors for bacterial growth with variation extents.