1,2-Naphthoquinone-4-Sulphonic Acid Sodium Salt (NQS) as an Analytical Reagent for the Determination of Pharmaceutical Amine by Spectrophotometry Abdalla Ahmed Elbashir a , Abir Abdalla Ahmed a , Shazalia M. Ali Ahmed a & Hassan Y. Aboul-Enein b a University of Khartoum, Faculty of Science, Chemistry Department, Khartoum, Sudan b Pharmaceutical and Medicinal Chemistry Department, Pharmaceutical...

Extensive hydrogen-bonds between the hydroxyl-rich BiOCl surface and phosphoric acid significantly facilitate oxygen vacancy formation, O2 activation, deep toluene oxidation.

That para-aminobenzoic acid antagonizes competitively the inhibitory effect of paraaminosalicylic acid on the growth of Mycobacterium tuberculosis is well known. In a previous communication (Hedgecock, 1956) it was reported that inhibition of M. tuberculosis (strain H37Rv) by para-aminosalicylic acid was reversed noncompetitively by methionine and biotin when the concentration of the inhibitor ...

kevlar is one of the fbers which is used in heavy industrial productions such as, shipping, military and weaving for reinforcement of composites. initial polymer of kevlar or poly(para-phenylene terephthalamide) is an oriented liquid crystal polymer. existence of aromatic group in the main chain leads to formation of rigid-rod molecules in the polymer, high strength and high modulus in it is fb...

This study was designed to investigate therapeutic effects of hyperbaric oxygen on experimentally induced colitis in rats by assessing oxidative tissue damage, neutrophil accumulation and histological changes. Six groups of animals were used. No procedures were done in the sham group. In the vehicle group, 50% ethanol-induced colitis, and in four other groups, 2,4,6-trinitrobenzene sulphonic ac...

Biocompatible oils are used in a variety of medical applications ranging from vaccine adjuvants to vehicles for oral drug delivery. To enable such nonpolar organic phases to serve as reservoirs for delivery of hydrophilic compounds, we explored the ability of block copolymer micelles in organic solvents to sequester proteins for sustained release across an oil-water interface. Self-assembly of ...

Three sulphonic acid-doped polyanilines were synthesized through chemical oxidation at low temperature (0-5 C) and potential of these polymers as sensing agent for O2 gas detection in terms of fluorescence quenching was studied. Sulphuric acid, dodecylbenzene sulphonic acid (DBSA) and camphor sulphonic acid (CSA) were used as doping agents. All polymers obtained were dark green powder. Polymers...