February 2013
Preliminary phytochemical screening and antimicrobial evaluation of four medicinal plants traditionally used in Nigeria for skin infection
The antimicrobial effect of some selected Nigerian medicinal plants traditionally used by the local people for treating skin infections was evaluated on some microorganisms likeCandida albicans MTCC 227, Staphylococcus aureus ATCC 2785, Proteus mirabilisATCC 21784 and Pseudomonas aeruginosa ATCC 27856. The solvents used for extraction were water, ethanol, methanol and petroleum ether....
February 2013
Highly efficient epoxidation of olefins with hydrogen peroxide oxidant using modified silver polyoxometalate catalysts
The catalytic epoxidation of olefins is an important reaction in chemical industry since epoxides are versatile and important intermediates in the synthesis of fine chemicals and pharmaceuticals. The current epoxidation procedures often use stoichiometric organic and sometimes toxic inorganic oxidants that are less favourable from an environmental and economical point of view. In contrast to such processes, catalytic...
February 2013
Corrosion inhibition for mild steel in 0.5 M H2SO4 solution using Achyranthes aspera L. leaf extract
The leaf extract of Achyranthes aspera L. was investigated for corrosion inhibition of mild steel in 0.5 M H2SO4 medium at room temperature. Gravimetric technique was used to study the corrosion behavior in the absence and presence of different concentrations of the leaf extract. The result obtained showed that the A. aspera L. is a good inhibitor for mild steel in 0.5 M H2SO4 solution. The...
February 2013
N-doped carbon aerogels for carbon dioxide (CO2) capture
The N-doped carbon aerogel materials were investigated to explore their potential use in carbon dioxide (CO2) capture. Carbon aerogels were prepared from a nitrogen-containing polymer precursor using urea as nitrogen source into the polymer matrix through the sol-gel method. CO2 capture performances were evaluated from 273 to 298K at 1 bar. CO2adsorption is influenced by the micropores and amount of a...
February 2013
Benzothiazole derivatives as corrosion inhibitors for carbon steel in 1 M phosphoric acid (H3PO4) solution
The inhibition of the corrosion of carbon steel in 1 M Phosphoric acid (H3PO4) solutions by some benzothiazole derivatives had been investigated using weight loss, potentiodynamic polarization, electrochemical impedance spectroscopy (EIS) and electrochemical frequency modulation (EFM) techniques. Inhibition was found to increase with increasing concentration of the benzothiazole derivatives but decreased with rise in...
February 2013
Separation of lead(II) paraffin-embedded tissues from liver loggerhead turtles specimens by organic-solution-processable functionalized-nano graphene prior to determination by flame atomic absorption spectrometry (FAAS)
A novel and selective method for the fast determination of trace amounts of Pb(II) ions in liver loggerhead turtles specimens has been developed. A reliable and rapid method for preconcentration and modification of organic-solution-processable functionalized-nano graphene with Isopropyl 2-[(isopropoxy carbothioyl) disulfanyl] ethanethioate (IIDE) in order to prepare an effective sorbent for the preconcentration and...
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