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Search Results: 1 - 10 of 112110 matches for " Opeolu O. Ojo "
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Computational Biology and Bioinformatics in Nigeria
Segun A. Fatumo ,Moses P. Adoga,Opeolu O. Ojo,Olugbenga Oluwagbemi,Tolulope Adeoye,Itunuoluwa Ewejobi,Marion Adebiyi,Ezekiel Adebiyi ?,Clement Bewaji ?,Oyekanmi Nashiru ?
PLOS Computational Biology , 2014, DOI: doi/10.1371/journal.pcbi.1003516
Abstract: Over the past few decades, major advances in the field of molecular biology, coupled with advances in genomic technologies, have led to an explosive growth in the biological data generated by the scientific community. The critical need to process and analyze such a deluge of data and turn it into useful knowledge has caused bioinformatics to gain prominence and importance. Bioinformatics is an interdisciplinary research area that applies techniques, methodologies, and tools in computer and information science to solve biological problems. In Nigeria, bioinformatics has recently played a vital role in the advancement of biological sciences. As a developing country, the importance of bioinformatics is rapidly gaining acceptance, and bioinformatics groups comprised of biologists, computer scientists, and computer engineers are being constituted at Nigerian universities and research institutes. In this article, we present an overview of bioinformatics education and research in Nigeria. We also discuss professional societies and academic and research institutions that play central roles in advancing the discipline in Nigeria. Finally, we propose strategies that can bolster bioinformatics education and support from policy makers in Nigeria, with potential positive implications for other developing countries.
Zinc abatement from simulated and industrial wastewaters using sugarcane biomass
BO Opeolu, O Bamgbose, OS Fatoki
Water SA , 2011,
Abstract: The use of heavy metals and their compounds in industrial applications has resulted in their occurrence in various environmental media including water bodies. Conventional methods of heavy metal removal from wastewaters are very expensive, when available, especially in developing countries. This study therefore assessed the potential of sugarcane biomass to remove zinc from standard solutions and industrial (paint and textile) wastewaters. Parameters studied include contact time, biomass weight, metal concentration, pH, agitation, temperature and particle size. Physico-chemical characteristics of biomass were also studied. Adsorption of zinc increased with increases in contact time, biomass weight, pH and agitation speed, while adsorption decreased with increasing particle size and for temperatures above 50oC. Sugarcane biomass was responsible for over 90% adsorption of Zn2+ in both effluents. Under conditions of agitation, 100% adsorption was achieved. Percentage ash, particle density, cation exchange capacity (CEC) and porosity are important physico-chemical properties which influenced Zn2+ adsorption. Percentage ash and CEC are positively correlated to percentage adsorption while particle density and porosity are negatively correlated. Percentage desorption was over 90 for both effluents. Sugarcane biomass is therefore a potential alternative to expensive synthetic resins. Its biodegradability makes disposal environmentally friendly. However, there is the need to further study the biomass in flow-through systems for industrial applicability.
Analysis of Vertical Profiles of Precipitable Liquid Water Content in a Tropical Climate Using Micro Rain Radar  [PDF]
Joseph S. Ojo, Omololu O. Daodu, Olalekan L. Ojo
Journal of Geoscience and Environment Protection (GEP) , 2019, DOI: 10.4236/gep.2019.72010
Abstract: In this paper, some distinctive features of the vertical profile of precipitable liquid water content (LWC) with considerable respect to rain rates (R) and radar reflectivity (Z) obtained in a tropical location are presented. Assessment of LWC allows applications in the specific area of flight icing severity, aviation safety as well as signals traversing through the atmosphere. The parameters were typically measured using vertically-pointing Micro Rain Radar (MRR) over a period of 2 years (2011-2012) at Akure, a tropical location of Nigeria. The radar scanned at every 10 seconds and integrated over one minute samples to reduce event logging error associated with the instrument. The vertical profile of the LWC typically reveals a prominent seasonal variation. However, majority of the LWC profiles has low LWC, less than 0.1 gm?3 while the maximum observed LWC is about 3.18 gm?3. A strong like hood relation was observed between the melting layer height and the LWC, with the LWC reaches peak at the considerable height of about 4160 m which coincides precisely with the freezing height level (rain height of ~4520 m) of the study location. Good correlation was also observed between the LWC and R in most of the heights considered. The results obtained will assist system engineers to assess the level of absorption, reflection and attenuation of electromagnetic signals as a result of precipitable LWC along the transmitting paths. The novelty of the present work is in the area of linking LWC and Z as against usual relation between Z and R.
Application of Differential Transformation Method to Boundary Value Problems of Order Seven and Eight  [PDF]
R. B. Ogunrinde, O. M. Ojo
American Journal of Computational Mathematics (AJCM) , 2018, DOI: 10.4236/ajcm.2018.83022
Abstract: This paper presents the use of differential transformation method (DTM), an approximating technique for solving linear higher order boundary value problems. Using DTM, approximate solutions of order seven and eight boundary value problems were developed. Approximate results are given for some examples to illustrate the efficiency and accuracy of the method. The results from this method are compared with the exact solutions.
Indoor Air Pollution and Health Risks among Rural Dwellers in Odeda Area, South-Western Nigeria
O Oguntoke, B.O Opeolu, N Babatunde
Ethiopian Journal of Environmental Studies and Management , 2010,
Abstract: This study monitored the concentration of five greenhouse gases and examined the health outcome among the exposed rural residents. A total of 15 villages were randomly selected from the list of villages without electricity supply in Odeda local government area, Ogun State (southwestern Nigeria). Gasman auto sampler was used to monitor indoor air quality in houses selected through systematic random sampling. Air monitoring was observed in replicates over a period of three months. In order to elicit information on energy utilization and occurrence of air pollution related health problems among the rural dwellers, one questionnaire was administered to a male or female household head in each selected house. Due to absence of reliable health records in the area, recall method was used collect information on the health problems treated and or experienced by village dwellers. The mean values of SO2, NO2, CO, H2S and CH4 are 0.05±0.005, 0.21±0.013, 82.5±1.98, 0.15±0.009 and 0.15±0.01 among the fifteen villages. Although there were no significant variations in the concentration of these gases among the villages, they were all above the recommended National Ambient Air standards. The trend of indoor air pollution may not be unconnected with 83.3 percent of the residents depending on fuel-wood for energy supply. Overall, more than one-quarter of the residents cook within their dwelling units. Prevalent health problems among the residents included sneezing (44%), nausea (34%), headache (34%), dizziness (31.1%), eye irritation (23.3%), and catarrh (24%) among others. These health problems are largely consequences of human exposure to high concentration of gaseous pollutants in the air. Intervention to control rural indoor air pollution requires urgent attention so as to preserve the health of teeming rural inhabitants and safeguard the overall environment.
Levels of Cadmium, Lead and Zinc in Urine of Randomly Selected Smokers and Non-Smokers Residents of Abeokuta City, Nigeria
O. Bamgbose,B.O. Opeolu,J.T. Bamgbose
Research Journal of Applied Sciences , 2012,
Abstract: Urine samples of 200 male volunteers comprising 100 smokers and 100 non-smokers were analysed for levels of heavy metals using Perkin-Elmer atomic Absorption spectrophotometer model 4600. The levels of Cadmium (Cd), lead (Pb) and Zinc (Zn) in urine samples of non-smokers ranged from 0.34-0.65, 0.037-0.25 and 0.235-0.664 g mL-1, respectively while the corresponding range for smokers were 0.075-0.341, 0.076-0.297 and 0.488-1.976 g mL-1. Most smokers respondents had metal concentrations that exceeded the normal urinary levels for each metal. For the non-smokers in age groups 10-19, 20-29, 30-39 and 40-49, the average urinary excretion values of 0.046, 0.050, 0.054 and 0.051 g Cd mL-1; 0.152, 0.101, 0.094 and 0.138 g Pb mL-1; 0.433, 0.515, 0.551 and 0.561 g Zn mL-1 were respectively obtained, while for the smokers in age group 10-19, 20-29, 30-39 and 40-49, the average urinary excretion values of 0.110, 0.207, 0.216 and 0.330 g Cd mL-1; 0.145, 0.183, 0.203 and 0.182 g Pb mL-1; 0.563, 1.145, 1.089 and 1.718 g Zn mL-1 were obtained. Regression analysis show that a significant correlation (r>0.9) exist between metal concentration (Cd and Zn) and duration of smoking period.
Synthesis and fungicidal activity of some sulphide derivatives of O-phenyl-N-substituted phenylcarbamates  [PDF]
F. E. Adelowo, I. A. O. Ojo, O. S. Amuda
Advances in Biological Chemistry (ABC) , 2011, DOI: 10.4236/abc.2011.13015
Abstract: Monosulphides of O-phenyl-N-substituted phenylcar- bamates were prepared by the reaction between O- phenyl-N-substituted phenylcarbamates and sulph- ur dichloride while the corresponding disulphides were prepared by the reaction between O-phenyl-N- substituted phenylcarbamates and sulphur monoch- loride. The synthesized compounds were characte-rized by elemental analysis, thin layer chromatogra-phy (TLC), Fourier-transform infrared, 1H and 13C nuclear magnetic resonance spectroscopic techniques. In vitro fungicidal assay of these sulphides against Fusarium oxysporum, Aspergillus niger, Aspergillus flavus and Rhizopus stolonifer showed that they were more fungicidal than their parent carbamates. The synthesized sulphides were more active towards As-pergillus niger and Aspergillus flavus. There was little or no variations in the fungicidal activities of the synthesized monosulphides and disulphides of O-phen- yl-N-substituted phenyl carbamates.
Improving Efficiency in Food Crop Production for Food Security in Nigeria
S.O. Ojo
Agricultural Journal , 2013,
Abstract: The study examined the factors determining the productivity and technical efficiency of yam production in Ondo State Nigeria, with a view to improving its production as a panacea for solving food security problems in the country. The data, mainly from primary sources were collected from 160 yam farmers selected from four local government areas in the state using multistage sampling techniques. The data were analysed using descriptive statistics, gross margin and stochastic frontier production function. The study revealed that yam production was very profitable in the study area and that while all the technical and socio-economic variables involved in yam production were in the efficient stage of resource allocation, educational level of the farmers was in the inefficient stage. The overall productivity of yam production, Return to Scale (RTS) was however in the irrational zone of the production function, thus giving room for future expansion in output and productivity. The Technical Efficiency (TE) of the farmers varied significantly with about 97% variation in their output caused by differences in the farmers TE. While type of farming led to increase in TE, source of land, type of labour and distance of yam farm led to decrease in TE.
Knowledge and perception of stroke among at risk medical out-patients in a tertiary health institution in Nigeria
Ajayi A,Ojo O
Annals of African Medicine , 2007,
Abstract: Background : Patients who recognize their increased risk of stroke are more likely to engage in stroke prevention practices than those who do not. Method : All patients attending medical out-patient clinic of the Federal Medical Center, Ido, Ekiti-State, Nigeria between January 2004-December 2004 were recruited into the screening process following their verbal consent. A set of questionnaire was administered to collect data. Results : A total of 155 patients were studied having satisfied the inclusion criteria. The mean age of the patients was 58.4±18.7 years. Majority of the patients indicated paralysis of one side of the body as the most common symptom of stroke. Patients with higher education p=0.002 and men p=0.004 were more aware of their increased risk factor for stroke than those with low education and women. Conclusion : Perception about stroke among the at risk medical out patients as found out in this study indicates that more health education both at the community and the hospital is very vital to reducing the prevalence, recurrence, disability andmortality of stroke. Health providers are enjoined to communicate information about stroke risk to their patients.
Productivity and Technical Efficiency of Poultry Egg Production in Nigeria
S.O. Ojo
International Journal of Poultry Science , 2003,
Abstract: The study examined the Productivity and Technical Efficiency of Poultry egg production in Nigeria using the stochastic frontier production function analysis. Primary data were collected using a set of structured questionnaire from two hundred poultry egg farmers who were selected using multi stage sampling techniques, from five Local Government Areas (LGA) of Osun state, Nigeria. Results showed that poultry egg production was in the rational stage of production (stage II) as depicted by the Returns to Scale (RTS) of 0.771. The variables of interest, stock of birds, operating costs, and other costs were effectively allocated and used, as confirmed by each variable having estimated coefficient value between zero and unity. The Technical Efficiencies of the farmers varied widely between 0.239 and 0.933 with a mean of 0.763 and about seventy nine percent of the farmers had T.E. exceeding 0.70. This study further observed that only location of farm (nearness to urban centre) positively affected T.E while increase in the other socio-economic variables, age, experience and education led to decrease in T.E.
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