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Articles by R.O. Yusuf
Total Records ( 4 ) for R.O. Yusuf
  O.A. Olu-Arotiowa , L.A. Jimoda , D.O. Araromi and R.O. Yusuf
  Production of polyurethane foam has been made more cost effective by introducing soya-oil as a surfactant. Consequently, profit maximization has brought about the need to introduce less expensive stabilizing agent. This led to the use of soya-oil in substituting for the commonly used silicone oil. This was carried out in varying concentrations of silicon and soya-oil. It was however proven that soya-oil cannot act as surfactant in polyurethane foam but a combination of 75 silicon oil and 25% vegetable oil gives polyurethane foam with desired physical and mechanical properties. The costing of the price per block of foam produced shows that foam production using vegetable oil as surfactant is cost effective and characterized by foams of better quality.
  R.O. Yusuf and M.O. Oyewunmi
  This research covered the estimation of methane emitted from solid wastes using Ilorin, Central Nigeria, as a case study from 1991-2020. The 1991 Nigerian National population figure was used as baseline. The estimation was carried out by the application of the model equations of default methodology established by the Intergovernmental Panel on Climate Change (IPCC). The estimated amount of methane emitted in 1991 was found to be approximately 2.61 Gg CH4 and is expected to be 5.85 Gg CH4 by 2020. The estimated amount of methane was found to be increasing yearly. It was concluded that methane could be generated from solid waste disposal sites.
  O.A. Olu-Arotiowa , R.O. Yusuf and F. Adelowo-Imoekparia
  Theoretical models for biodegradation of crude oil spill have been developed. The model was formulated on specific rate of biodegradation of the crude oil for both single and multiple microbial catalyzed reactions. The formulated model was tested for biodegradation of the diesel oil with experimental data obtained. The result of the simulation showed that the models are suitable for predicting the rates of biodegradation of hydrocarbon mixtures.
  S.E. Agarry , R.O. Yusuf and C.N. Owabor
  Mass transfer was quantitatively investigated during osmotic dehydration of potato. Potato, containing a variety of individual soluble components was immersed in different concentrations of sugar solutions. Water and natural solutes flowed out of the sample into the solution while sugar solutes were taken up from the solution into the product this enriched the unstable final product of the process. An empirical model was developed to predict water loss and solid gain based on a first-order kinetic equation in which the rate constant is a function of the main process variables (solute concentration, size of vegetable (potato) and process temperature). The model was applied to experimental and its parameters were estimated using non-linear regression method. The results showed that all of the above process variables have significant impact on the mass transfer phenomena during osmotic dehydration.
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