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Search Results: 1 - 10 of 714470 matches for " M. A. Olutoye "
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Electrochemical Separation of Metal Silver from Industrial Wastewater  [PDF]
M. A. Olutoye, J. A. Alhamdu
Advances in Chemical Engineering and Science (ACES) , 2014, DOI: 10.4236/aces.2014.44043
Abstract: Investigation into the separation of metal silver from industrial wastewater using electrochemical cell was carried out. Wastewater from photo laboratories was collected and treated batch wise using electrolytic equipment. A constant voltage of 2.0 V and variable current in the range of 0.3 - 0.6 A at normal temperature were passed through the electrolyte for a period from 0.25 - 1.0 h. The results showed that increase in current yield an increase in the amount of metallic silver recovered with highest values of 2.3 g and 2.8 g at 0.6 A for the tested samples 1 and 2, respectively. The electrochemical separation method proved to be more reliable and economical when compared to other methods and also, reduction in environmental pollution of industrial wastewater containing high concentration of silver metal is achieved.
Improvement of Nigerian Crude Residue
Leonardo Journal of Sciences , 2005,
Abstract: This research investigates how the properties of the Nigerian crude residue can be improved on to enhance its local usage. Chemical treatment was carried out on Nigerian crude residue and its rheological properties were tested. The physiochemical properties- specific gravity cum viscosity measured after the treatment gave 12.44% improvement in specific gravity and 17.92 times improvement in viscosity of untreated residue when oxidation technique was used while sulphurisation gave 9.5% improvement in specific gravity and kinematic viscosity was 15.24 times better than that of untreated bitumen. Blending and addition of polymer also improves the physiochemical properties considerably depending on the properties of blending additive used. With the application of this treatment technique, the properties of the Nigerian crude residue have been considerably improved and it was found to be suitable for construction purposes cum other uses.
Design of a Manually Operated Paper-Recycling Machine
Leonardo Electronic Journal of Practices and Technologies , 2005,
Abstract: A manually operated paper-recycling machine was designed and fabricated. This was done to enable waste paper conversion into useful product. The fabricated plant consists of six major component units that include the disc refiner, the hydropulper, the head box, the felt conveyor, the driers and the rollers. From the results of experimental analysis carried out on the study, it was discovered that for every 0.1kg of used paper fed into the refiner, about 7000ml of water is required to defibre it, and about 0.2 kg of starch adhesive is required. The calculated volume of the refiner, hydropulper and head box is 11795.62cm3, 62930.47cm3 and 60979.096cm3 respectively. The fabricated machine is capable of producing 7.6 kg of recycled paper from 10 kg of used paper.
Mathematical Modeling of a Simulated Fixed Bed for Desalting Operation
Leonardo Journal of Sciences , 2006,
Abstract: Continue survival of the petrochemical industry in the face of advancement in processing technology must change for better performance. In doing so, the pre-treatment stage of crude, which include desalting will go a long way at improving the overall quality of the product obtained. It is in view of this that a mathematical modeling of adsorption of a fixed simulated bed for desalting operation was carried out to determine the variation of the concentration of adsorbate (mol/l) and the amount of adsorbate (mol) of the simulated fixed bed, using a prototype simulated fixed bed, and Silica – Alumina as the adsorbent. A model equation was developed from the prototype .both the model and simulated results showed that the concentration of the effluent stream decreases as the height increases down the column, giving effective absorbate absorption, until the concentration reaches 2.48 mol/l, while the amount of the absorbate increases down the depth of the column to an amount 28.29 mol, The optimum height for the adsorbent bed design obtained was approximately 5.67m, while the graphical analysis of the experimental and the simulated results showed that there is a close agreement between them. The results obtain is suitable for desalting operation and for research and development of the existing plants, and can be used in building of pilot scale to the plant stage.
Partial Replacement of Ordinary Portland Cement (OPC) with Bambara Groundnut Shell Ash (BGSA) in Concrete
Leonardo Electronic Journal of Practices and Technologies , 2005,
Abstract: This paper examines Ordinary Portland Cement (OPC) and Bambara Groundnut Shell Ash (BGSA) concrete. The ash contained 10.91% CaO, 2.16% Fe2O3, 4.72% MgO, 33.36% SiO2, 1.75% Al2O3, 16.18% K2O, 9.30% Na2O, 6.40% SO3, 6.02% CO3 and 9.20% HCO3. 10%, 20%, 30%, 40% 50% and 0% ash was used in the mix to replace cement. The strength of cement/ash concrete increased with curing period but decreased with increasing ash percentage. The highest strength was 31.24N/mm2 and 20.68N/mm2 at 28 days for 0% and 10% ash respectively. Substitution of cement with ash in concrete formation was relatively possible not exceeding 10%.
Fluidization Characteristics of a Prototype Fluidized Bed Reactor
Leonardo Journal of Sciences , 2005,
Abstract: The fluidization characteristics of a prototype-fluidized bed laboratory reactor were understudied in order to investigate the suitable conditions at which the dehydrogenation reaction of butane could be carried out. To achieve this, a reactor with an effective volume of 1100ml was fabricated and coupled with temperature and pressure accessories.Zeolites were obtained from the market and clay obtained from different sources and pre-treated was used as catalyst. Airflow at high velocity between 3000-7000ml/hr was used as the fluidising medium to obtain the bed characteristics while butane gas was used to obtain the dehydrogenation kinetics.The temperature of the reactor system was varied between 353K and 413K while maintaining constant pressure of 1.5 105 N/m2 through a manifold gauge and a constant catalyst weight. Various methods such as pressure fluctuations, visual observations, and bed expansion were used to determine the transition velocity at which fluidization begins. It was observed that this depends on factors such as mean particle size, particle size distribution, and column diameter.The minimum fluidizing velocity obtained for zeolite was 0.0133m/s and 0.0102m/s for treated clay materials both for a particle size of 250μm. The conversion of butane over the catalysts showed an increase in both cases with a maximum at 0.9813 at 413K. This decreases as the reaction progresses.
Anaesthesia for the EXIT procedure: A review
OA Olutoye
Southern African Journal of Anaesthesia and Analgesia , 2009,
Abstract: No
Folic Acid Reverses the Effects of Cannabis on the Brain of New Born Wistar Rats  [PDF]
Olakunle Olutoye Osinubi, Silas Kalu Onwuka, James Olukayode Olopade, Ayo M. Olude
Neuroscience & Medicine (NM) , 2019, DOI: 10.4236/nm.2019.103016
Abstract: There are conflicting reports on the effect of Cannabis on brain cells, some reports support damage to brain cells while others do not. This work was carried out at the neuroscience unit of the Department of Veterinary Anatomy, University of Ibadan Oyo State, Nigeria. It investigated the neurodegenerative effect of extract of Cannabis sativa plant on brain regions in newborn Wistar rats exposed to Cannabis in utero and also combining the antioxidant and cell proliferative properties of folic acid to reverse these changes particularly in the Purkinje layer of the cerebellum in the group that received folic acid and cannabis. Four groups of pregnant Wistar rats were treated from Day 5 to 20 of pregnancy as follows: group A received 2ml of normal saline solution per os, group B received 2.0 mg /kg body weight of ethanolic extract of Cannabis sativa plant dissolved in normal saline per os, group C received 2.0 mg /kg body weight of Cannabis sativa extract and 40 mg/kg body weight of folic acid tablets (Emzor®) and group D received 2 mg/kg body weight of folic acid per os. The rat pups from group B showed deficit in locomotor function with spongiosis and astrogliosis in the corpus callosum, cerebellum and hippocampal regions of the brain. While pups from group A showed normal locomotor activities with no visible lesions in regions of the brain such as the cerebrum, cerebellum and the hippocampus. Group C pups were presented with normal locomotor activities with congestion of vessels in cerebrum and meninges and scattered areas of cell loss in the cerebrum, cerebellum hippocampus and corpus callosum and group D pups showed normal locomotor function, with vascular congestion in the meninges and cerebrum. We, therefore, concluded that folic acid which is a crucial factor in cell division, neurotransmitter production and an antioxidant in the nervous system could have a reversal of behavioural and locomotor deficits on nervous tissues exposed to Cannabis sativa extract by reducing the rate of cell death and increasing cellular stability and integrity in brain.
Quality Improvement of an Acid Treated Fuel Oil
Elizabeth Jumoke ETERIGHO,Moses Aderemi OLUTOYE
Leonardo Electronic Journal of Practices and Technologies , 2008,
Abstract: The work on the quality improvement of fuel oil using acid treatment was carried out. The improvement of the fuel oil was done using sulphuric acid to remove contaminants. Sulphuric acid at different concentrations were mixed with the oil and kept at 45°C for four hours in the agitator vessel to allow reaction to take place. Acidic sludge was then drained off from the agitator and the oil was neutralized with sodium hydroxide. Centrifugation operation was used to extract the sulphonate dispersed in the oil. The treated and untreated oils were characterized for various properties and the results showed that the viscosity, total sulphur of fuel oil decreased from 6.0 to before 5.0 cst after acid treatment and 2.57 to 1.2225% w/w respectively while the flash point increased from 248 to 264°F. The water and sediment content increased from trace before to 0.6 after treatment. In addition, the calorific value increased from initial value of 44,368 to 44,805 and 44,715 kJ/kg at 50% and 75% conc. H2SO4 while decreasing with 85% and 90% conc. H2SO4. However, both carbon residue and ash content decreases with an increase in acid concentration.
Modelling of a Gas Absorption Column for CO2-NaOH System under Unsteady-State Regime
Moses Aderemi OLUTOYE,Elizabeth Jumoke ETERIGHO
Leonardo Electronic Journal of Practices and Technologies , 2008,
Abstract: The research work on the unsteady state behavior of gas absorption column for CO2-NaOH system was carried out using the armfield gas absorption column. A model equation was developed by considering material balance around the system. The concentrations of the inlet and outlet liquid streams and the gas outlet stream varied as functions of time, while all other parameters, gas inlet stream concentration, and tank volume, were constant. Model equations were derived for the time dependent parameters and the model compared with experiments conducted for duration of 90 minutes showed that 0.2 gram mole/litre of NaOH solution reacts with CO2 to give 0.1 gram mole/litre of Na2CO3.This clearly shows that the results of experiments conducted were in agreement with the model results.
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