May 2012
Pyrimidine derivatives as environmentally-friendly corrosion inhibitors: A review
The perpetual quest for more efficient and environment friendly corrosion inhibitors remain a focal point in corrosion control. The use of organic compounds to inhibit corrosion has assumed great significance due to their vast applications in counteracting wastage of ferrous alloys. These compounds have shown great effectiveness for inhibiting aqueous corrosion due to film formation by adsorption on the metal...
May 2012
Production and purification of horseradish peroxidase in Pakistan
Horseradish peroxidase is heme containing enzyme belonging to oxidoreductases and is involved in degradation of certain recalcitrant organic compounds like phenol and substituted phenol via free radical polymerization. Peroxidase was extracted and purified from horseradish by (NH4)2SO4 precipitation, dialysis and gel filtration chromatography. Spectrophotometer was used for the assay of horseradish...
May 2012
Two step growth process of iron-platinum (FePt) nanoparticles
In this paper, FePt nanocrystals have been prepared by adding LiBEt3H to the phenyl ether solution of FeCl2. 4H2O and Pt(acac)2 precursors in the presence of oleic acid and oleylamine surfactants and 1,2-hexadecanediol as the reducing reagent at 195°C, followed by refluxing at 245°C by sol process. Similarly, Pt nanoparticles were made by adding 1, 2-hexadecanediol as the reducing reagent to the...
May 2012
Groundwater exploration in the basement of Lake-Iro District-Chad, using electrical resistivity imaging approach
The complex geological setting of groundwater systems in the Lake-Iro District (LID) gives cause for the adoption and application of a systematic methodological approach in groundwater exploration utilizing effective geophysical techniques. Among these geophysical methods, the electrical resistivity imaging (ERI) method has been found to be the most suitable for this kind of environmental...
May 2012
An attempt to solve neutron transport equation inside supercritical water nuclear reactors using the Boubaker Polynomials Expansion Scheme
In this paper, we use a polynomial scheme for solving the system of nonlinear boundary value problems associated with nuclear fission inside supercritical water nuclear reactors. The results are calculated in terms of series with easily computable components. The suggested method is applied without any discretization or transformation, but under some restrictive assumptions. To illustrate the implementation...
May 2012
Generation of analytical fragility curves for Ghanaian non-ductile reinforced concrete frame buildings
This study is on seismic safety evaluation of non-ductile reinforced concrete (RC) frame buildings in Ghana. Generic 3-, 4- and 6-storey non-ductile RC buildings were characterised for assessment. The generic buildings were designed according to British Standard (BS) 8110. The fragility curve parameters were generated using inelastic time history analyses for seismic demand and inelastic pushover analyses for...
May 2012
Effects of die shape modifications on the geometrical and dimensional accuracies of cold forged AUV propeller blade
Geometrical and dimensional accuracies are two major concerns in precision forging and they become more critical with increasing part complexity. In this study, the geometrical error of an autonomous underwater vehicle (AUV) propeller blade is quantified by comparing the blade and punch profiles. The nominal geometry of the blade is compared to the blade profile measured using the optical...
May 2012
Water stress effect on spring rapeseed cultivars yield and yield components in winter planting
Since the most widespread limiting factor in agricultural production is water stress, a two year field experiment was carried out in Karaj, Iran during 2008 to 2010 growing seasons to assess the effect of water stress on yield and yield components of spring rapeseed (Brassica napus L.) cultivars in winter planting to find the most tolerant cultivars. The experiments was laid out in a...
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