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Search Results: 1 - 10 of 263246 matches for " O. E. "
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Durational Therapeutic Dose of Fansidar: A Functional Index in Its Antidiabetic Properties  [PDF]
E. O. Jimmy
Journal of Biosciences and Medicines (JBM) , 2019, DOI: 10.4236/jbm.2019.71003
Abstract: Effects of fansidar in alloxan-induced diabetes were investigated in thirty (30) male and female albino rats for 28 days. The results showed a steady weekly decrease in blood glucose concentration in induced diabetic rats after fansidar treatment. In week 1, i.e. 7 days, there was significant difference in the blood glucose levels between the control and diabetic rats (P < 0.05) i.e. high glucose concentration, same in week II i.e. 14 days. However, in day 21 i.e. week III there was a significant reduction in the blood glucose concentration compared with control P < 0.05. The same results were obtained in week IV i.e. in 28 days treatment. The result has shown that fansidar has antidiabetic potentials on long term durational administration.
The Influence of Atmospheric Parameters on Production and Distribution of Air Pollutants in Bayelsa: A State in the Niger Delta Region of Nigeria  [PDF]
E. I. Njoku, O. E. Ogunsola, E. O. Oladiran
Atmospheric and Climate Sciences (ACS) , 2019, DOI: 10.4236/acs.2019.91011
Abstract: Air pollution is a primary environmental problem in the Niger Delta region of Nigeria due to oil spills including the gas emissions associated with industrial effluents. However, a good understanding and quantification of atmospheric parameters (wind speed, wind direction, temperature, relative humidity, solar radiation and cloud cover) that influence air pollution (CH4, NO2 and O3) concentrations in this region could assist in the mitigation and distribution of these pollutants. This work examines the influence of atmospheric parameters on the production and distribution of air pollutants in the Niger Delta region of Nigeria for the development of control strategies that will enhance the mitigation and amelioration of the significant impacts that these atmospheric pollutants could have on the populace in this part of the country. The CH4 and NO2 data utilized in this study were sourced from the European Space Agency (ESA), while that of tropospheric ozone (O3) was obtained from the National Aeronautics and Space Administration (NASA), and the atmospheric parameters data were provided by the Nigeria Meteorological Agencies (NIMET), Lagos. The analysis of the daily pollutants (CH4, NO2 and O3) including the atmospheric parameters in this region of the Niger Delta for the period 2003 to 2010 was carried out using standard statistical approach including the graphical method, stepwise regression model, least-square method, and correlation analysis. The Mann-Kendal rank statistics was also utilized in identifying the meaningful long-term trends, validation and testing of the homogeneity of the concentrations of the pollutants. The results of the correlations of CH4, NO2 and O3 concentrations with their previous day’s concentrations showed a strong significance in regression analysis for both CH4 and O3. The coefficient of determination of CH4 and O3 was obtained as 0.654 and 0.810 respectively, while a very weak correlation was obtained for NO2. However, despite that a very strong negative correlation of -0.809 and -0.900 was obtained between wind speed and both the CH4 and O3 pollutants respectively, a moderate correlation was obtained between the wind speed and NO2. This implies that amongst the atmospheric parameters considered in this study for the region of the Niger Delta in Nigeria, wind speed has much influence on the
Tibialization of Fibula in Treatment of Major Bone Gap Defect of the Tibia: A Case Report  [PDF]
O. C. Nwokike, E. E. Esezobor, D. O. Olomu, E. O. Edomwonyi, J. E. Onuminya
Open Journal of Orthopedics (OJO) , 2015, DOI: 10.4236/ojo.2015.58032
Abstract: Gap bone defect is a major challenge. Its treatment has evolved over the years from amputation to limb reconstruction through vascularised graft, distraction osteogenesis and use of customised implants. Availability and affordability of these innovative techniques have always been an additional challenge in the developing resource poor countries. We report the use of Tibialization of Ipsilateral fibula first suggested by Hahns in 1884 to bridge a gap of 12 cm in an 8 year old male, with segmental tibia loss from chronic osteomyelitis. We did an end to end transposition of the ipsilateral fibular into the tibia gap defect in a one stage procedure. This was after eradication of the infective process of osteomyelitis. He commenced partial weight bearing ambulation in cast at 3 months and out of cast ambulation at 18 months post surgery. The transposed fibula was 75% tibialized at 18 months post surgery. Conclusion: Fibular is a useful armamentarium in filling segmental bone defect.
Rural Livelihoods Vulnerabilities and Commercial Bushmeat Hunting Challenges in Cross River National Park, Nigeria  [PDF]
Oliver O. O. Enuoh, Francis E. Bisong
Natural Resources (NR) , 2014, DOI: 10.4236/nr.2014.513071
Abstract: Biodiversity conservation in parks and protected areas in Africa in general and especially in Nigeria is seriously threatened by the explosion of commercial bushmeat hunting activities in buffer zone communities. Several fauna species are becoming endangered and the list of extinct species is increasing due to commercial bushmeat hunting activities. Using a combination of qualitative and quantitative research techniques, this paper assesses the livelihoods vulnerability underpinnings of commercial bushmeat hunting activities in Cross River National Park (CRNP). Results reveal that commercial bushmeat hunting activities are shaped by a vulnerability context that hinges on different elements of environmental shocks, seasonal challenges and surrounding societal trends. The paper highlights the conservation and global sustainable development implications of uncontrolled commercial bushmeat hunting practices and concludes with options on policy recommendations and future research trajectories.
Colonial Forest Policies and Tropical Deforestation: The Case of Cross River State, Nigeria  [PDF]
Oliver O. O. Enuoh, Francis E. Bisong
Open Journal of Forestry (OJF) , 2015, DOI: 10.4236/ojf.2015.51008
Abstract: Nigeria has lost over 90% of her forest resources due to the hydra-headed and enduring problem of deforestation, hinging on timber logging, establishment of agricultural plantations in hitherto intact forest reserves, construction of highways, mining of solid minerals, approval of taungya farming activities in forest reserves, extraction of non-timber forest products (NTFPs), and dereservation of large areas of certain forest reserves for other economic and development activities. Though colonialism was dismantled in the first half of the twentieth century, its policies on forest nationalization remain unchanged across many independent states in the tropics including Nigeria. The paper assesses the colonial forest policy underpinnings of tropical deforestation in Cross River State of Nigeria. It highlights the weaknesses of forest reservation laws and its impacts on tropical deforestation. The paper concludes by advocating a shift in forest policies in favour of property rights recognition and devolution of forest management responsibilities to forest communities.
An Update on Traumatic Joint Dislocations in Nigeria  [PDF]
E. O. Edomwonyi, R. E. T. Enemudo
Open Journal of Orthopedics (OJO) , 2015, DOI: 10.4236/ojo.2015.57029
Abstract: Trauma has assumed a pre-eminent epidemic proportion in the hierarchy of diseases afflicting the growing populace in Nigeria. Research into traumatic dislocations is relatively small. Road traffic accident is the commonest cause of traumatic dislocation in Nigeria currently. Human factors and collapse of road infrastructures are the major reasons. Young, productive, adult males are still the most affected while the rarity among children is again highlighted. Careful and detailed evaluation of patients is advised as certain conditions can mask the presence of a dislocation. Lack of diagnostic and therapeutic facilities in most centres in Nigeria makes this difficult, with clinicians resorting to clinical evaluation only and probably supported by only plain X-rays in some cases. Most cases are amenable to closed surgical management. Identification of long term complications is a major challenge, because of the poor follow up culture of our patients. Good road design and maintenance, enforcement of road regulations, manpower development and improvements in diagnostic and therapeutic facilities in all centres will reduce the burden of traumatic dislocations on the populace.
Precipitation of Heavy Organics (Asphaltenes) from Crude Oil Residue Using Binary Mixtures of n-Alkanes  [PDF]
O. Achugasim, I. E. Ekpo
Advances in Chemical Engineering and Science (ACES) , 2015, DOI: 10.4236/aces.2015.51010
Abstract: Two solvent mixtures: n-pentane/n-hexane and n-heptane/n-octane at ten different percentage ratios were used to dissolve 2.5 g of vacuum distilled Anthan crude oil residue (500°C). The crude oil/n-alkane mixture in different conical flasks was stoppered, shaked mechanically and allowed to stand overnight. The resultant solution was subsequently filtered using a vacuum pump to afford the different weights of the residue (asphaltenes). The result of the weights of asphaltenes obtained at the different ratios of solvent mixtures showed that the highest amount of precipitate was obtained at 100% n-pentane solvent. Also there was a sharp increase in the amount of asphaltenes precipitated when the percentage ratio of n-pentane to n-hexane precipitant was 40:60 and when the ratio of n-heptane to n-octane precipitant was 30:70. A good understanding of the contribution of the different n-alkane solvents in the precipitation of asphaltenes is very necessary to flow assurance of crude oils in terms of solid precipitation.
Heat and Mass Transfer in MHD Micropolar Fluid Flow over a Stretching Sheet with Velocity and Thermal Slip Conditions  [PDF]
E. O. Fatunmbi, A. Adeniyan
Open Journal of Fluid Dynamics (OJFD) , 2018, DOI: 10.4236/ojfd.2018.82014
Abstract: This study presents the problem of a steady, two-dimensional, heat and mass transfer of an incompressible, electrically conducting micropolar fluid flow past a stretching surface with velocity and thermal slip conditions. Also, the influences of temperature dependent viscosity, thermal radiation and non-uniform heat generation/absorption and chemical reaction of a general order are examined on the fluid flow. The governing system of partial differential equations of the fluid flow are transformed into non-linear ordinary differential equations by an appropriate similarity variables and the resulting equations are solved by shooting method coupled with fourth order Runge-Kutta integration scheme. The effects of the controlling parameters on the velocity, temperature, microrotation and concentration profiles as well as on the skin friction, Nusselt number, Sherwood and wall couple stress are investigated through tables and graphs. Comparison of the present results with the existing results in the literature in some limiting cases shows an excellent agreement.
Analysis of Rainfall Variability Using Remote Sensing and GIS in North Central Nigeria  [PDF]
O. Ideki, V. E. Weli
Atmospheric and Climate Sciences (ACS) , 2019, DOI: 10.4236/acs.2019.92013
Abstract: The importance of rainfall variability in successfully understanding the dynamics of climate change in any region cannot be overemphasized. This study examines rainfall variability in the North Central region including the Federal Capital Territory Abuja using remote sensing and geographic information system (GIS) application. The study employed satellite data basically from near real time data of Moderate Resolution Imaging Spectroradiometer (MODIS). Thereafter, the point data of rainfall was clipped to the shape file of Nigeria Boundary and interpolation using Inverse Distance Weight (IDW) was done to generate rainfall spatial maps from 2000-2017. The result reveal high temporal variation in rainfall particularly Niger, Plateau, Benue and Nassarawa states. The study therefore recommends close monitoring of periodic pattern of rainfall characteristics in the region by the Nigerian meteorological agency and to encourage farmers into drought tolerant and irrigation farming.
Optimizing the Properties of Polyether Based Polyurethane Foam  [PDF]
F. O. Aramide, P. O. Atanda, E. O. Olorunniwo
Open Journal of Polymer Chemistry (OJPChem) , 2013, DOI: 10.4236/ojpchem.2013.34015
Abstract:

Effect of different chemicals and additives used in producing polyester foam was investigated. Reference samples were produced from polyol, toluene di isocyanate (TDI), amine stannous octoate distil water, and silicone oil using laboratory mix formulation based on 500 g polyether based polyol. Other samples were produced by consecutively varying the content of all the additives with the exception of polyol. Standard sample dimensions for density test, indentation test, compression set test, tensile strength and elongation tests were produced from the samples. The various tests were carried out on the samples using the ASTM-D3574 standards. It was observed that the degree of indentation affects the value of indentation hardness and increasing the percentage content of TDI results in acceptable compression set value for the polyester samples. It was concluded that Holding all other parameters constant, reducing the water content and increasing the TDI content will yield polyester foam of optimum properties.

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