Papers by Olusheyi Ojekunle
Journal of Environmental Sciences-china - J ENVIRON SCI-CHINA, 2007
A study was conducted to compare the diversity of 2-, 3-, and 4-chlorobenzoate degraders in two p... more A study was conducted to compare the diversity of 2-, 3-, and 4-chlorobenzoate degraders in two pristine soils and one contaminated sewage sludge. These samples contained strikingly different populations of mono-chlorobenzoate degraders. Although fewer cultures were isolated in the uncontaminated soils than contaminated one, the ability of microbial populations to mineralize chlorobenzoate was widespread. The 3- and 4-chlorobenzoate degraders were more diverse than the 2-chlorobenzoate degraders. One of the strains isolated from the sewage sludge was obtained. Based on its phenotype, chemotaxonomic properties and 16S rRNA gene, the organism S-7 was classified as Rhodococcus erythropolis. The strain can grow at temperature from 4 to 37°C. It can utilize several (halo)aromatic compounds. Moreover, strain S-7 can grow and use 3-chlorobenzoate as sole carbon source in a temperatures range of 10–30°C with stoichiometric release of chloride ions. The psychrotolerant ability was significan...
Biology of Reproduction, 1983
The concentrations of heavy metals were determined from the soil of the mechanic village, in Abeo... more The concentrations of heavy metals were determined from the soil of the mechanic village, in Abeokuta and a control farmland located at Federal University of Agriculture, Abeokuta (FUNAAB). The soil sample collected at the base of different species of tree showed that the heavy metals were below permissible levels (FAO/WHO and EC/CODEX standard) and show no significant difference in the range of mean. Absorption of heavy metals by the bark of the trees in the mechanic village was evident when compared relatively to the presence and uptake of the heavy metals from the soil by tree in the farmland. The mean concentrations of the heavy metals in the soil of the farmland are in this order of magnitude Cd>Cu>Pb, while the mean concentration of the heavy metals in the soil of the mechanic village are in the order of magnitude Pb>Cu>Cd. Lead has the least concentration in the farmland, while in the mechanic village, it is the predominant heavy metal detected which also shows greater significant different at p<0.05 with a value of 24.34 mg/kg indicating area of high mechanic activities. The concentration values of heavy metals in the barks in comparison to the standard shows that the concentration of the heavy metals in those vicinities is within the permissible range for cadmium and copper, while lead present was above the WHO/FAO standard at 0.299 mg/kg and close to the EC/CODEX standard. It can also be concluded that the uptake efficiency of heavy metal under study of the three species are in the order magnitude Mango>Cashew>Neem.
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Papers by Olusheyi Ojekunle