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Search Results: 1 - 10 of 155126 matches for " Michael O. Daramola "
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Comparative study of thermophilic and mesophilic anaerobic treatment of purified terephthalic acid (PTA) wastewater  [PDF]
Michael O. Daramola, Elizabeth F. Aransiola, Adeniyi G. Adeogun
Natural Science (NS) , 2011, DOI: 10.4236/ns.2011.35050
Abstract: The paper provides a critical comparison between mesophilic and thermophilic anaerobic treatment of PTA wastewater through diagnosis of a case study. Aspects covered are bioavailability, biodegradability, microbial population, thermodynamics, kinetics involved and bio-reactor design for PTA wastewater treatment. The results of the case study suggests that one- stage thermophilic anaerobic reactor coupled with coagulation-flocculation pre-treatment unit and an aerobic post treatment unit could be techno-economically viable for PTA wastewater treatment to ensure that the final effluent quality conforms to the international standard. The in-formation emanated from this study could be useful and thought provoking to the professionals and academia in the area of PTA wastewater treatment and can serve as impetus toward the development of research lines in similar problems like the treatment of other petrochemical wastewater such as phenol-con- taining wastewater, benzene/benzoic acid-con- taining wastewater or wastewater from other similar industrial settings.
Homogeneously Catalyzed Transesterification of Nigerian Jatropha curcas Oil into Biodiesel: A Kinetic Study  [PDF]
Elizabeth F. Aransiola, Michael O. Daramola, Tunde Victor Ojumu, Bamidele Ogbe Solomon, Stephen K. Layokun
Modern Research in Catalysis (MRC) , 2013, DOI: 10.4236/mrc.2013.23012

As a follow-up to our previous study on the transesterification of Nigerian Jatropha curcas oil into Biodiesel using homogenous catalysis, kinetic study of the reaction is hereby presented. The kinetic study revealed that the rate of formation of biodiesel can be increased by increasing reaction temperature and oil to alcohol molar ratio. The optimum reaction condition was established to be 60°C (reaction temperature) and 1:6 (oil to alcohol ratio). Accordingly, the highest biodiesel yield obtained from homogeneously catalyzed transesterification of Nigerian Jatropha curcas (JC) oil into Biodiesel was 86.61% w/w at 60°C with oil to alcohol ratio of 1:6. Furthermore, kinetic study also revealed that conversion of triglyceride to diglyceride was the rate determining step (RDS) of the overall reaction because activation energy of its backward reaction is lower than that of the forward reaction, indicating unstable nature and higher potential energy of the diglyceride in comparison to the triglyceride.

Potential Applications of Zeolite Membranes in Reaction Coupling Separation Processes
Michael O. Daramola,Elizabeth F. Aransiola,Tunde V. Ojumu
Materials , 2012, DOI: 10.3390/ma5112101
Abstract: Future production of chemicals (e.g., fine and specialty chemicals) in industry is faced with the challenge of limited material and energy resources. However, process intensification might play a significant role in alleviating this problem. A vision of process intensification through multifunctional reactors has stimulated research on membrane-based reactive separation processes, in which membrane separation and catalytic reaction occur simultaneously in one unit. These processes are rather attractive applications because they are potentially compact, less capital intensive, and have lower processing costs than traditional processes. Therefore this review discusses the progress and potential applications that have occurred in the field of zeolite membrane reactors during the last few years. The aim of this article is to update researchers in the field of process intensification and also provoke their thoughts on further research efforts to explore and exploit the potential applications of zeolite membrane reactors in industry. Further evaluation of this technology for industrial acceptability is essential in this regard. Therefore, studies such as techno-economical feasibility, optimization and scale-up are of the utmost importance.
Correction: Daramola, M.O.; Aransiola, E.F.; Ojumu, T.V. Potential Applications of Zeolite Membranes in Reaction Coupling Separation Processes. Materials 2012, 5, 2101-2136.
Michael O. Daramola,Elizabeth F. Aransiola,Tunde V. Ojumu
Materials , 2013, DOI: 10.3390/ma6041432
Abstract: Due to an oversight by the authors, Table 4 in the aforementioned review article [1] should have been referred to as obtained from reference [2]: Khajavi, S. Separation of Process Water Using Hydroxy Sodalite Membranes. PhD Thesis, Delft University of Technology, Delft, The Netherlands, 2010. Furthermore, an additional affiliation for the first author of this review is added as follows: Catalysis Engineering Section, Delft University of Technology, Julianalaan 136, 2628 BL, Delft, The Netherlands The authors apologize for any inconvenience this may have caused.
Effects of Heat Treatment on the Mechanical Properties of Rolled Medium Carbon Steel  [PDF]
O.O. Daramola, B.O. Adewuyi, I.O. Oladele
Journal of Minerals and Materials Characterization and Engineering (JMMCE) , 2010, DOI: 10.4236/jmmce.2010.98050
Abstract: Investigations were carried out to study the effects of heat treatment on the mechanical properties of rolled medium carbon steel. The steel was heated to the austenizing temperature of 830℃ and water quenched; It was reheated to the ferrite – austenite two phase region at a temperature of 745℃ below the effective Ac3 point. The steel was then rapidly quenched in water and tempered at 480℃ to provide an alloy containing strong, tough, lath martensite (fibres) in a ductile soft ferrite matrix. The result shows that the steel developed has excellent combination of tensile strength, impact strength and ductility which is very attractive for structural use.
Corrosion Behaviour of Heat Treated Rolled Medium Carbon Steel in Marine Environment  [PDF]
O.O. Daramola, B.O. Adewuyi, I.O. Oladele
Journal of Minerals and Materials Characterization and Engineering (JMMCE) , 2011, DOI: 10.4236/jmmce.2011.1010069
Abstract: Investigation were carried out to study the corrosion behaviour of heat treated rolled medium carbon steel and as-rolled medium carbon steel in sodium chloride medium. The as-rolled medium carbon steel was heated to a temperature of 830℃ to completely austenize it and water quenched; it was reheated to the ferrite-austenite dual phase region at a temperature of 745℃ below the effective Ac3 point. The steel was then rapidly quenched in water and tempered at a temperature of 480℃. The corrosion behaviour of the steel in marine medium (NaCl) was studied by weight loss measurement. The weight loss is between 0.02g-0.11g for the as-rolled steel and 0.01g – 0.013g for the heat treated steel. The results obtained showed that the as-rolled medium carbon steel is more susceptible to corrosion than the heat treated rolled medium carbon steel.
Socio-Economic Factors Influencing Entrepreneurship Among Women In Fishing Communities In Ondo State, Nigeria
F O Omotoso, G A Daramola
Journal of Agriculture and Social Research (JASR) , 2005,
Abstract: From the early years till date, Nigerian women in fishing sector remain a potent force in the economic growth of fishing communities. However, many socio-economic factors influence their entrepreneurial skills. This paper examines some objectives such as, what roles do women play in planning and fisheries management? What are the socio-economic factors determining fishing households? What is the allocation of labour/time between productive and non-productive activities? What are the effects of simulated policies on entrepreneurship among the women? Ilaje and Ese–Odo local Government areas of Ondo State are the study areas. One hundred respondents were interviewed in all. Descriptive tools as frequencies, percentages, means and modes were used to analyze the primary data. The study found that overall entrepreneurial rating of the study group is low, essential input can not be easily gotten in the area, the respondents has large household size thereby had a large dependents to take care of, income level is generally low, no modern processing technique and no storage facilities. It also established the need to help them.
The comparison of intelligence quotients of atopic and nonatopic children in Ibadan, Nigeria
Daramola O O M,Ayoola O,Ogunbiyi A
Indian Journal of Dermatology , 2010,
Abstract: Background: Atopy-related illnesses such as atopic dermatitis and asthma are chronic illnesses, and children suffering from such illnesses are subjected to frequent absenteeism from school. Studies have shown that the performance of children with asthma was comparable to their healthy counterparts despite their absenteeism at school, in contrast to findings in other chronic illnesses like epilepsy. Aim: In the present study, we investigated the association between atopy and intelligence quotient (IQ) scores in a group of Nigerian children in Ibadan, a city in southwestern Nigeria. Materials and Methods: This is a cross-sectional study of children in an urban elementary school. Questionnaires to ascertain the presence of atopy-associated conditions such as hay fever, atopic dermatitis, asthma, allergic rhinitis, and allergic conjunctivitis were administered to the parents of 128 pupils in the 3 rd to 6 th grades of elementary school. Based on the responses to the questionnaire, pupils were categorized as being atopic and nonatopic. All the pupils underwent the Standard Progressive Matrices IQ test. The IQ scores were then compared among these two groups of children. Results: Out of the children studied, 26.6% were found to have atopy and after adjusting for factors such as age and sex, the IQ scores in this atopic group were not found to be statistically different from the scores in the nonatopic group (r = 2.122872, P = 0.009). Conclusion: IQ scores were not statistically significantly different for children with and without atopy. Thus, the presence of atopy does not appear to be associated with low IQ scores and hence, may not be related to poor school performance.
Studies of the properties of heat treated rolled medium carbon steel
Oluyemi, Daramola O.;Oluwole, Oladele Isiaka;Adewuyi, B. O.;
Materials Research , 2011, DOI: 10.1590/S1516-14392011005000040
Abstract: investigations were carried out to study critically the effects of heat treatment on the properties of rolled medium carbon steel. representative samples of as-rolled medium carbon steel were subjected to heat treatment processes which are; quenching, lamellae formation and tempering in the following order (q + q + l + t), (q + l + t) and (l + t). the steel was heated to the austenizing temperature of 830 oc and water quenched. the quenched steel was subjected to lamellae formation by reheating it to the ferrite-austenite dual-phase region at a temperature of 745 oc below the effective ac3 point and then rapidly quenched in water. the lamellae formed was tempered at 480 oc to provide an alloy containing strong, tough and lath martensite in a soft and ductile ferrite matrix. mechanical tests were carried out on the samples and the results shows that the steel developed has excellent combination of tensile strength, hardness and impact strength which is very good for structural applications. the corrosion behaviour of the samples; heat treated rolled medium carbon steel and as-rolled medium carbon steel in sodium chloride medium were also investigated from where it was also confirmed that improved corrosion resistance is achievable by the treatment.
Autopsy as a tool in the prevention of maternal mortality
A.O Daramola, A.A.F Banjo
Nigerian Journal of Clinical Practice , 2009,
Abstract: Maternal mortality rates are an index of the state of a nation's health system. Maternal autopsies help to determine these rates, provide information on avoidable/unavoidable causes of mortality, consequently leading to the development of strategies for treatment and prevention ofmaternalmortality andmorbidity. The lesson from post-mortem examinations, using the vehicle of confidential enquiries into maternal deaths, can save the lives of many; causing reduction in both maternal and perinatal mortality as well as reductions in morbidity. However for autopsies to fulfil this role they must be of a very high standard and must be subjected to quality controlmeasures.
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