March 2008
The effect of zinc additions to the corrosion rates and tensile strengths of aluminium system
Zinc oxide concentrations of 0.2778, 0.3012, 0.3821, 0.4942 and 0.5915 wt% were added to a standard mixture of the composition of an aluminium system. The systems were produced into rectangular flat sheet samples of about 5 mm thickness produced by First Aluminium Alloy Ltd, Port Harcourt, Nigeria. Ten coupon specimens (5 x 20 x 50 mm size) identified as A, B, C, D and E were polished, cleaned, washed in...
March 2008
Pattern of antibiotic usage by adult populations in the city of Benin, Nigeria
Inappropriate use of antibiotics may play a major role in the development and spread of antibiotics resistant bacteria. Against this background, questionnaires were administered for utilization of antibiotic usage among some Nigerians in Benin. There were 3435 respondents made up of 743 (21.6%) housewives, 467 (13.6%) taxi drivers, 892 (26.0%) students, 288 (8.4%) teachers, 85 (2.5%) lawyers, 741 (21.5%)...
March 2008
Energetics of the interaction between piroxicam and beta-cyclodextrin (β-CD) in inclusion complexes
The thermodynamic parameters of the inclusion complexation interaction of piroxicam and beta-cyclodextrin have been evaluated. Inclusion complexes of piroxicam and beta-cyclodextrin were produced by different methods such as physical mixture, kneading, coprecipitation, evaporation and heating under reflux. X-ray powder diffraction (XRPD) studies confirmed formation of inclusion complexes between piroxicam and...
March 2008
Application of correlation analysis in assessment of relationships between mineral hydrocarbon levels and hydrocarbonoclastic bacteria count in tropical mangrove estuarine sediments
Pearson’s Product-Moment correlation analysis of the relationships between total hydrocarbon content (THC) and hydrocarbon utilizing bacteria population (HUB) in mangrove sediments and overlying water of the Qua Iboe Estuary, Nigeria was carried out. The results show that there was in general a close relationship between the two variables, but also a large amount of variation not explained by the...
March 2008
In vitro antibacterial activities of crude extracts of Nauclea latifolia and Daniella oliveri
The comparative studies of extracts of leaves, barks and roots of Nauclea latifolia and Daniella oliveri with respect to their phytochemical and antibacterial properties was carried out. Preliminary screening for phytochemical components showed that both plants had similar constituents, namely tannins, alkaloids and glycosides, but variable proportions of saponins. The antibacterial...
March 2008
Purification profile of b-amylase from Bacillus species
The purified b-amylase had more enzymatic activity than crude samples fromBacillus species as shown in this study whereby the activity of crude enzyme from Bacillus subtilis (WBS) and Bacillus licheniformis (WBL) were 6.24 and 4.2 unit/ml while the purified enzymes had an improved activity of 18 and 18.60 unit/ml, respectively. The protein concentration of the enzyme samples...
March 2008
Land degradation evaluation in a game reserve in Eastern Cape of South Africa: soil properties and vegetation cover
Land degradation in the agricultural domains of South Africa has attained a scale that requires scientific intervention. To devise an appropriate control measure, we investigated the contribution of vegetation condition and soil properties to observed land degradation conditions. Twenty three degraded sites were identified and classified using a land degradation index derived from six physical degradation...
March 2008
Microbial analysis of different top soil samples of selected site in Obafemi Awolowo University, Nigeria
Soil samples were collected from three different locations within the Obafemi Awolowo University (OAU) Ile-Ife Campus complex and labelled according to the site of collections as PAG (park and garden), HOR (hall of residence) and BIS (biological sciences). The total bacterial and fungal counts of the soil samples were estimated using standard spread plate technique. A pH meter was used to monitor soil pH...
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