November 2011
Coming of Age in Durban
November 2011
Incurred environmental risks and potential contamination sources in an abandoned mine site
The mineralogical characterization of Fedj Lahdoum mine wastes measured by X-ray Diffraction (XRD) and Scanning Electron Microscopy (SEM) showed the presence of the following sulfide minerals: galena (PbS), sphalerite (ZnS), pyrite (FeS2), cerussite (PbCO3) and smithsonite (ZnCO3). The wastes were stored in tailing ponds. The results showed that the concentration of metals from tailings were up to 10 460...
November 2011
Comparison of various oxidative treatments for removal of reactive black CNN
Decolorization of reactive black CNN by chemical oxidation and reduction using KMnO4, H2O2 and Ferrioxalate as oxidizing agents and Na2SO3 as reducing agent individually as well as in combination was studied on batch scale using UV-visible spectroscopy. Degradation of dye occurred in acidic medium with KMnO4 and in alkaline medium with H2O2 and ferrioxalate. The most efficient methods for decolorization of...
November 2011
Water quality effects of harbour activities assessed with integrated ecotoxicological parameters in Kerala, India
Ecological tools were developed to study the water quality in Cochin harbour, a complex aquatic ecosystems, through the integration of microbiological monitoring (faecal coliforms and Pseudomonas species) and heavy metal contamination (lead, cadmium and mercury). One way ANOVA indicates statistically significant differences (P = 0.002) in bacterial population between sites and at the same comparatively...
November 2011
Assessment of groundwater contamination by leachate near a municipal solid waste landfill
Physico-chemical and microbiological parameters were analyzed in leachate and groundwater samples obtained at different locations adjacent to a municipal solid waste landfill in order to assess the impact of leachate percolation on groundwater quality. Total dissolved solids (TDS), electrical conductivity (EC), and Na+ exceeded the World Health Organization (WHO) tolerance levels for drinking water in...
November 2011
Population morphological variation of the Nile perch (Lates niloticus, L. 1758), of East African Lakes and their associated waters
In this study an attempt was made to determine whether there are morphological variations associated with the different geographical populations of the Nile perch of East Africa. Analyses of the levels of morphological differentiation based on morphological characterisation and variation were carried out. The study was based on 864 Nile perch sampled from 25 different locations from...
November 2011
Developmental biology and field performance of Platygaster diplosisae Risbec (Hymn: Platygasteridae) an egg-larval parasitoid of african rice gall midge Orseolia oryzivora Harris and Gagné (Diptera: Cecidoymiidae)
The developmental biology and field performance of Platygaster diplosisae an endoparasitoid of African rice gall midge (AfRGM) Orseolia oryzivora were investigated. Experiments were conducted in the screen house, laboratory and fields during 2006/2007 farming seasons. The pre-oviposition period averaged 12.1 h. The mean number of eggs laid per female was 95.2 and mean oviposition period was 3.5 days. The...
November 2011
A preliminary study on limnological stock assessment, productivity and potential fish yield of Omi Dam, Nigeria
This study examined the water quality, primary productivity, plankton and the potential fish yield of Omi dam for management purposes. Among the physico-chemical parameters analyzed, Ca2+ and HCO3, were found to be above permissible limits ((3.90 ± 0.68, 24.50 ± 7.33, respectively). A total of 24 species of phytoplankton belonging to three major taxa were recorded. Most species were of the class...
November 2011
Effect of nitrogen and phosphorous on Farm Plantations in various agroecological zones of Punjab, Pakistan
Against a world average of 25% area under forests, Pakistan has around 5% and Punjab has only 2% area under manageable and productive forests. The present deteriorating condition of the forests in Punjab has bleak prospects of improvement and expansion in near future due to ever increasing demand for agriculture produce. In view of the present situation the best possible solution...
November 2011
Comparative assessment of edaphic features and phytodiversity in lower Dachigam National Park, Kashmir Himalaya, India
The present study was conducted to investigate the comparative assessment of edaphic factors and phytodiversity of herbaceous vegetation on seasonal basis spring (March to May), summer (June to August), autumn (September to November) and winter (December to February), at two different ecosystems in lower Dachigam National Park, Kashmir Himalaya. Phytosociological attributes of plant species were studied by...
November 2011
Estimating the wind energy potential over the coastal stations of Nigeria using power law and diabatic methods
The suitability of two coastal stations in Nigeria for wind energy generation is presented in this study. To estimate the wind speeds at the desired height 70 m for standard wind turbine, two methods; namely power law relationship and diabatic evaluation have been considered. It was found that the diabatic evaluation method performed better because certain physical conditions of farm site are included in the...
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