In the present investigation, a series of 3-(4-methoxyphenyl)-1-isonicotinoyl-5-(substituted phenyl)-formazans (5a-r) were synthesized by condensation of schiff base (3) and diazonium salt of various substituted aromatic amines, (3a-r). The intermediate schiff base (3) was itself synthesized by condensation of isonicotinic acid hydrazide with 4methoxybenzaldehyde (2). The structures of the comp...

A simplified and precise automated method is described for the colorimetric determination of serum glutamic oxaloacetic transaminase. The enzymically generated oxaloacetic acid is dialyzed, coupled with Fast Ponceau L, a diazonium salt, to form a colored solution whose absorbance is measured at 455 m . Dialysis eliminates the need for a serum control determination, thereby halving the analysis ...

Some pharmacologically active sulpha/substituted Indoles were synthesised by refluxing the mixture of sulpha/substituted phenyl amine and α-haloacyl benzene in glacial acetic acid. The newly synthesised compounds were characterised by IR, 1H NMR, and UV spectral studies. They were also evaluated for their promising pharmacological activity such as anti-tuberculosis and anti-inflammatory activit...

In the present study, an appropriate synthetic route was adopted to produce the target synthesis of Juglone. In the first of these objectives, 5-nitro-1,4-naphthoquinone had been synthesized by direct nitration of 1,4-naphthoquinone in the presence of water and sulfuric acid. Then the intermediate synthesis of 5-amino-1,4-naphthoquinone was obtained by the reduction of nitro. Finally, Juglone w...

A crude preparation of alkaline phosphatase (EC 3.1.3.1) from calf intestinal mucosa was purified by affinity chromatography on Sepharose-bound derivatives of arsanilic acid, which was found to be a competitive inhibitor of the enzyme. Three biospecific adsorbents were prepared for the chromatography, and the best results were obtained with a tyraminyl-Sepharose derivative coupled with the diaz...

The synthesis of diazonium salts is historically an important transformation extensively utilized in dye manufacture. However the highly reactive nature of the diazonium functionality has additionally led to the development of many new reactions including several carbon-carbon bond forming processes. It is therefore highly desirable to determine optimum conditions for the formation of diazonium...

Rice husks are a major agricultural residue with growing volume in Nigeria recent times owing to the country’s drive for self-sufficiency rice production. have great potential use as fillers biocomposites applications manufacture of engineering products. However, hydrophilic nature this limits its choice biocomposites. This study focused on modification property through treatment benzene diazon...

In the current work, azo ligand and its Pd (Ⅱ), Cd Zn (Ⅱ) Hg complexes were synthesized, characterized their spectroscopic characteristics studied. The new was synthesized from coupling reaction between 4,5-bis(4-methoxy phenyl)imidazole diazonium salt of 4-Amino benzoic acid in an alkaline medium at 0-5 ᵒC. metal prepared by metals chlorides. All compounds FT-IR, 1H-NMR, Mass spectral analysis...