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International Research Journal of Pure and Applied Chemistry

Published by SCIENCEDOMAIN international · ISSN (electronic) 2231-3443

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1,032

Articles indexed

72

2026 articles

1,032

Open access

4,649

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Articles (1032)

Synthesis of Some Novel Bis 1,3,4-Oxadiazole Fused Azo Dye Derivatives as Potent Antimicrobial Agents

A. H. Shridhar, J. Keshavayya, H. Joy Hoskeri & R. A. Shoukat Ali · International Research Journal of Pure and Applied Chemistry · 2011

3,5-bis(5-(furan-2-yl)-1,3,4-oxadiazol-2-yl)azo dyes were synthesized by multistep reaction sequences, which is diazotized and coupled with different napthols and quinoline. Structure of newly synthesized compounds were characterized and confirmed by IR, NMR and Mass spectral stu...

Open access Research Article 10.9734/IRJPAC/2011/493

New SPE Sorbent for the Rapid and Sensitive Quantification of Aluminium in Food, Soil Extracts and Water Samples

Alaa S. Amin & Mohammed A. Kassem · International Research Journal of Pure and Applied Chemistry · 2011

An on-line solid-phase extraction (SPE) technique, linked to spectrophotometry, has been developed to overcome the problem of high matrix concentration, which is thought to interfere with the determination of low levels of aluminum in environmental samples. Aurintricarboxylic aci...

Open access Research Article 10.9734/IRJPAC/2011/473

Novel Routes to Biologically Active Enaminones, Dienoic Acid Amides, Arylazonicotinates and Dihydropyridazines under Microwave Irradiation

M. A. El-Apasery, S. M. Al-Mousawi, H. Mahmoud & M. H. Elnagdi · International Research Journal of Pure and Applied Chemistry · 2011

Condensation of methylketones 1a,b with dimethylformamide dimethyl acetal (DMFDMA) without solvent in microwave oven afforded enaminones 2a,b, which reacted with malononitrile in ethanolic piperidine to yield dienoic acid amides 7a,b. In contrast, reactions of 2a,b with cyanoacet...

Open access Research Article 10.9734/IRJPAC/2011/504

Studies on Characterization and Photocatalytic Activities of Visible Light Sensitive TiO2 Nano Catalysts Co-doped with Magnesium and Copper

Teshome Abdo Segne, Siva Rao Tirukkovalluri & Subrahmanyam Challapalli · International Research Journal of Pure and Applied Chemistry · 2011

TiO2 (anatase) – based photocatalyst powders containing up to 1.00 wt% of magnesium(II) and copper(II) were synthesized using sol– gel method.  The powders were characterized by UV–visible Diffuse Reflectance Spectroscopy (DRS), X-ray diffraction (XRD), N2 adsorption–desorption (...

Open access Research Article 10.9734/IRJPAC/2011/453

The Conceptual Meaning of Thermodynamic Entropy in the 21st Century1

Frank L. Lambert · International Research Journal of Pure and Applied Chemistry · 2011

Although entropy change – the process described by Clausius and characterized as the second law of thermodynamics – involves only two terms, energy change and temperature, neither he nor distinguished scientists of the past century focused on that fact.  The novel word “entropy”...

Open access Research Article 10.9734/IRJPAC/2011/679

Sol-Gel Synthesis, Crystal Structure and Electronic Properties in Bi2+xAlxNi4-3xO7+δ (0.0 ≤ x ≤ 0.75) Composite Oxides

B. B. Das & M. Yogapriya · International Research Journal of Pure and Applied Chemistry · 2011

Sol-gel synthesis of Bi2+xAlxNi4-3xO7+δ (A1-A4: x = 0.0, 0.25, 0.50, 0.75) composite oxides were performed via nitrate-citrate route. Analysis of the powder XRD patterns by Fullprof shows cubic unit cell with lattice parameters in A1-A4: a = 10.2678, 10.1197, 10.1183, 10.1134 Å;...

Open access Research Article 10.9734/IRJPAC/2011/351

Isotopic Self - Programming for the Embryonic Cell DNA Methylation Pattern

Andrey A. Ivanov · International Research Journal of Pure and Applied Chemistry · 2011

This paper is an original attempt to analyze a series of experimental data obtained lately by the author in a course of his long term studies on the probable role of isotopy in the molecular evolution of living systems as well as in the eukaryotic cell differentiation mechanisms....

Open access Research Article 10.9734/IRJPAC/2011/369

New Copper(II) Complexes of Peptides: DNA Binding and Photocleavage Studies

C. N. Sudhamani, H. S. Bhojya Naik, D. Girija & T. Aravinda · International Research Journal of Pure and Applied Chemistry · 2011

Peptides were synthesized by the reaction of Fmoc-amino acid chloride and aminoacid ester hydrochloride in DCM. The obtained peptide ligands were characterized by elemental analysis, NMR, IR and mass spectra. Three copper complexes of peptides Fmoc.Ala-val-OH (F-AVOH), Fmoc-Phe-L...

Open access Research Article 10.9734/IRJPAC/2011/307