July 2007
Biosorption of Cr, Mn, Fe, Ni, Cu and Pb metals from petroleum refinery effluent by calcium alginate immobilized mycelia of Polyporus squamosus
Two samples of wastewater were collected and initial concentrations of heavy metals and other elements in wastewater were determined using X-ray fluorescence spectroscopy. Exponentially growing mycelia of the white rot fungus Polyporus squamosus immobilized on calcium alginate was applied to 500 ml of wastewater samples. Biosorption investigations were conducted in a stirring bioreactor. Results obtained...
July 2007
A mathematics vision from the usual environment
The search of the improvement of teaching and learning processes forces the education community to being kept worried in order to get the best way of presenting contents in the classroom, using the suitable materials and with a prepared organization. In order to obtain it, ideas can arise at any moment or place. One way to do it is using the nearest environment in order to work mathematics contents with activities of...
July 2007
Adaptogenic potentials of Camellia sinensis leaves, Garcinia kola and Kola nitida seeds
In this study, we screened Garcinia kola seed (GKS), Kola nitida seed (KNS) andCamellia sinensis Leaves (TEA) for adaptogenic potentials. The investigation was carried out in albino rats to determine the ability of these plant materials to increase non-specific resistance against physical, chemical and biological stressors. The results show that the three plant materials protected the...
July 2007
Impact of climate change on agriculture in Africa by 2030
Concerns about climate change are global and real. As all communities try to get adapted to the challenges of their local climate, they are today sensitive to its variations. Third World coun-tries, particularly Africa are threatened by the predicted effects of climate change because of their economic dependence on climate for development whose backbone is agriculture. There is strong evidence from the World...
July 2007
Toxicity of phenolic compounds to oxidoreductases of Acinetobacter species isolated from a tropical soil
The effects of 2-nitrophenol, 4-nitrophenol, 2,4-dinitrophenol and 4-bromophenol on the acti-vities of periplasmic nitrate reductase and dehydrogenase enzymes of Acinetobacter sp. iso-lated from a tropical soil were assessed via reduction of nitrate and 2,3,5-triphenyltetrazoluim chloride, respectively. There were significant differences in the response of dehydrogenase enz-yme but not periplasmic...
July 2007
Parkinson’s disease: A perilous magic of nature
Parkinson’s disease, a neurodegenerative disorder, has prominent symptoms like tremor, rigidity, akinesia and bradykinesia. Cases of Parkinson’s disease are reported to be more in old age, mostly above the age of 60 years. Loss of dopaminergic neurons of the substantia nigra causes lack of motor functions. The dopaminergic neurons synthesizing dopamine from...
July 2007
Insecticidal activity of 3-acetyl moraldehyde and agauriasterone from Agauria salicifolia
Bioassay guided chromatographic separation of a methanolic extract of Agauria salicifolia led to isolation of 3-acetyl moraldehyde and aguariasterone, whose structures were elucidated using spectroscopic data (UV, IR, and NMR) and melting points. Insecticidal activity was done using adult Phaedon cochleariae (Mustard beetle) at concentration of 1, 0.1, and 0.01% at a dose of 1.00 μg per insect of...
July 2007
Preliminary studies of aerosol composition in coastal areas
The wind speed and turbulence in the atmospheric surface layer are key parameters in the air-sea exchange processes. The turbulent structure of the marine atmospheric boundary layer (MABL) is very much influenced by the state of the sea (Panin and Krivickij, 1992). The aerosol composition in the MABL is influenced by air-sea gas exchange and subsequent atmospheric gas-gas and particle-gas reactions, sea spray and long...
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