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Search Results: 1 - 10 of 111947 matches for " Obafemi O. Olubanjo "
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Development of a Batch-Type Biogas Digester Using a Combination of Cow Dung, Swine Dung and Poultry Dropping  [PDF]
Olawale O. Olanrewaju, Obafemi O. Olubanjo
International Journal of Clean Coal and Energy (IJCCE) , 2019, DOI: 10.4236/ijcce.2019.82002
Abstract: The overdependence on crude oil in African countries warrants the need for alternative sources of energy. A 56-litre-capacity biogas digester was designed, fabricated and evaluated. Investigations were made into the production of biogas from the mixture of cow dung, swine dung and poultry dropping. Standard equations and models were used in the design of the components of the manually operated digester. The digester temperature, ambient temperature and pH were monitored during the experiment. The proximate analysis showed that volatile solid, total solid and moisture content for the mixed substrates at the initial stage were: 64.7%, 83.5% and 13.5% respectively. Similarly, at the digestion stage, the volatile solid, total solid and moisture content were: 54.1%, 22.6% and 74.4% respectively. Advancement of decomposition leads to gradual increasing pH value from 7.2 to 7.4, which indicates the stability of organic matter. The moisture content on a wet basis was initially 13.5%. This value latter increased to 74.4%. On the average, 15 kg of mixed substrates with 25 litres of impure water produced biogas within 25 days of digestion. The gas produced from mixed substrates became flammable with blue flame after 16 days of production, indicating that the ratio of methane gas generated with the three mixtures of fresh animal waste was higher than other gases produced.
Complete Endocardial Cushion Defect in the Presence of down Syndrome in a Nigerian Child: A Case Report
O.O. Olubanjo
The Cardiology , 2011,
Abstract: Down syndrome is the most commonly recognizable chromosomal anomaly with many associated complications. Though many of these have been documented in the Nigerian child but it thus appears to the best of the knowledge of this author that the cardiology complications have been scarcely reported. Thus, the need to report a case of completed endocardial cushion defect in the presence of trisomy 21 in a Nigerian child and make a case for routine echocardiograph in all clinically diagnosed trisomy 21 for the purpose of early intervention.
Complete Endocardial Cushion Defect in the Presence of down Syndrome in a Nigerian Child: A Case Report
O.O. Olubanjo
The Cardiology , 2008,
Abstract: Down syndrome is the most commonly recognizable chromosomal anomaly with many associated complications. Though many of these have been documented in the Nigerian child but it thus appears to the best of the knowledge of this author that the cardiology complications have been scarcely reported. Thus, the need to report a case of completed endocardial cushion defect in the presence of trisomy 21 in a Nigerian child and make a case for routine echocardiograph in all clinically diagnosed trisomy 21 for the purpose of early intervention.
The Effect of Electrolyte on Dye Sensitized Solar Cells Using Natural Dye from Mango (M. indica L.) Leaf as Sensitizer  [PDF]
T. J. Abodunrin, O. Obafemi, A. O. Boyo, T. Adebayo, R. Jimoh
Advances in Materials Physics and Chemistry (AMPC) , 2015, DOI: 10.4236/ampc.2015.56021
Abstract: Dye-sensitized solar cells (DSSC) were fabricated with mango leaf dye extracts as natural dye sensitizers at pH value of 5.20 and temperature of 18.1°C. Methanol was used as dye-extracting solvent. DSSCs from dye extract of M. indica L. with KMnO4 electrolyte had the highest photocurrent density of 1.3 mA/cm2 and fill factor FF of 0.46 for the sun at its peak. Potassium permanganate (KMnO4) had a photocurrent density of 1.3 mA/cm2 and FF of 0.8 at sundown. Potassium Iodide (KI), Potassium Bromide (KBr) and Mercury Chloride (HgCl2) electrolytes had 0.2 mA/cm2, 0.08 mA/cm2 and 0.02 mA/cm2 photocurrent densities respectively. The fill factors of 0.09, 0.03 and 0.003 respectively for sun overhead while 0.08 mA/cm2, 0.01 mA/cm2 and 0.01 mA/cm2 were the values of photocurrent densities respectively at sundown. The fill factors were 0.02, 0.0006 and 0.003 respectively at sundown. The maximum power Pmax of the DSSCs were 0.5 mW/cm2, 0.10 mW/cm2, 0.01 mW/cm2 and 0.012 mW/cm2 respectively at 1300 h at 1630 h 0.9 mW/cm2, 0.14 mW/cm2, 0.005 mW/cm2 and 0.0015 mW/cm2 respectively.
Poverty Determinants among Farmers in Ogun State, Nigeria
O.O. Olubanjo,S.O. Akinleye,W.A. Soremekun
Agricultural Journal , 2013,
Abstract: This study employed the Foster-Greer-Thorbecke (FGT) model, regression analysis and frequency counts to analyse poverty incidence, manifestations and determinants among 150 farmers in the Ijebu-North Local Government Area, Ogun State. In addition, the study presented the socio-demographic characteristics of the poor farmers in the sample, identified on the basis of an income-based poverty line measure. Results showed that among poor farmers, the poverty incidence was more for older and less for younger, farm operators. Further, the FGT measures indicated that poverty incidence, poverty depth and severity of poverty are 25.3, 23.3 and 21.5%, respectively. Farmlands fragmentation and farming experience showed significant, negative effect while age, level of education, level of capital borrowing, size of farmlands operated and household size indicated positive effect, on the poverty level among the sample. The effects were, however, significant for farmlands fragmentation, farming experience, the size of farmlands cultivated and the level of borrowing.
DETERMINANTS OF INCOME DIVERSIFICATION AMONGST RURAL FARM HOUSEHOLDS IN SOUTHWEST NIGERIA
Idowu, Adewunmi. O.,Aihonsu, John O.Y,Olubanjo, Olugbenga O.,Shittu, Adebayo M.
Economics and Finance Review , 2011,
Abstract: This study aims to analyze the determinants of household income diversification and the share of income sources to total household income among the rural farm households in southwest Nigeria. The study drew a sample of 411 rural farm households through a multi-stage sampling technique from three states in southwest Nigeria and the data obtained were analyzed using the Herfindal index and Tobit regressions. Results indicate that the level of income diversification among rural farm households in southwest Nigeria depicted by inverse of Herfindal index was 2.82. An average rural farm household in southwest Nigeria had its members involving in three income generating activities with two farming activities and one non-farm job. Ninety five percent of rural farm households had their members involving in non-farm activities with non-farm self-employment contributing the largest share of non-farm income. Education, experience in any non-farm activity and distance to urban centre were the major determinants of income shares from different sources of non-farm activities while increase in the size of household, per capita landholding and per capita animal wealth significantly increased the income diversification of the rural farm households in southwest Nigeria. Implication is drawn for provision of enabling environment for the establishment of more non-farm self employment jobs.
HOUSEHOLD SANITATION AND MORTALITY RATE IN NIGERIA: AN EXPOSITORY ANALYSIS
AJAO, I.O.,OBAFEMI, O.S.,EWUMI, T.O.
Journal of Applied Sciences in Environmental Sanitation , 2011,
Abstract: The unpleasant situation of household sanitation in Nigeria calls for prompt attention. Access to safe water, Method of Refuse Disposal and Toilet Types are some of the household sanitation variables to be investigated. This research aims at studying a possible positive improvement in percentage of Access to safe water over a long period of years, and to verify if there is a significant relationship between mortality rate and household sanitation among the states in Nigeria. With the use of the secondary data gathered from the General Household Survey report by National Bureau of Statistics (NBS), and the application of STATA 8 and MINITAB 15, the difference in the percentage of Access to safe water is not significant. The regression analysis showed high significant relationship between Crude Death Rate (CDR) and Bad Refuse Disposal Method, while the time series plot exposes the upward trends in CDR for Kano, Benue, Jigawa and Imo states, and downward trends for Lagos, Yobe, Kwara, kogi, Abia, Niger, Osun, Ondo, Ogun and FCT (Abuja). This study, therefore, recommends that the governments at all levels should devise a better and more hygienic means of disposing household refuse in order to reduce the CDR, especially at this time when the country plans to be one of the first twenty (20) nations with largest economy by the year 2020.
An Economic Analysis of Capital Flight from Nigeria
Taiwo Olubanjo Ajilore
International Journal of Economics and Finance , 2010, DOI: 10.5539/ijef.v2n4p89
Abstract: Available estimates of capital flight from Nigeria have several important limitations. This study takes cognizance of these limitations in estimating and subsequent analysis of trends of capital flight flows in Nigeria for the periods 1970 -2004 using the residual method of estimation, including necessary adjustments to account for the influence of trade faking and exchange rates movements. The study further seeks to verify if capital flight is indeed an important concern to economic management in Nigeria by exploring various economic issues that existing body of theoretical and empirical literature had linked to capital flight. For most of the periods, capital flight estimates had positive sign, indicating that residents consistently took capital out of Nigeria. The study further documented that trade faking is an important means through which capital flight is effected in Nigeria, with evidences that confirmed the existence of financial revolving door relationship between capital flight and external indebtedness in Nigeria. The study emphasized the need for decisive policies to strengthen macroeconomic management and macro-organizational fundamentals. A rather flexible trade and exchange regimes that result in a lowering down of tariff duties, and a more market determined exchange rates, are likely to wipe out the incentives for fabrication of traded values of exports and imports.
11-(4-Methoxyphenyl)-3,3-dimethyl-2,3,4,5,10,11-hexahydro-1H-dibenzo[b,e][1,4]diazepin-1-one monohydrate
Olatomide A. Fadare,Pius O. Adelani,Adebomi A. Ikotun,Craig A. Obafemi
Acta Crystallographica Section E , 2012, DOI: 10.1107/s1600536812016194
Abstract: In the title compound, C22H24N2O2·H2O, the co-crystallized water molecule interacts with the N and O atoms of the molecule through Ow—H...N, Ow—H...O(methyl) and N—H...Ow hydrogen-bonding interactions. These hydrogen bonds, along with the intermolecular N—H...O=C hydrogen-bonding interactions, connect the molecules into a three-dimensional network. The dihedral angle between the two aromatic rings is 65.46 (10)°.
Geographical Information Systems, Urban Forestry and Climate Change: A Review
O.S. Eludoyin,P.B. Utang,A.A. Obafemi
Research Journal of Environmental and Earth Sciences , 2012,
Abstract: The paper unfolds the use of urban forestry in controlling climate change and presents the use Geographical Information System (GIS) as an adequate and efficient modern tool for analyzing and mapping the forest inventories for use in ameliorating the scourge of climate change in the society. The paper concludes that a holistic approach which involves the integrating urban forestry, GIS and elements of climate will go a long way to assist in saving the livelihood of mankind from being seriously affected by climate change. More so, adequate awareness should be given on the roles of urban forestry and GIS in reducing climate change. In addition, continual assessment of landuse and land cover should be done in order to detect the percentage change of urban forest resources over time with the use of GIS and remote sensing.
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