Browsing by Author "Adeoye AO"

Now showing 1 - 3 of 3
  • Thumbnail Image
    Item
    A study on effect of fermentation conditions on citric acid production from cassava peels
    (2020) Ajala AS; Adeoye AO; Olaniyan SA; Fasonyin OT
    In this study, effect of fermentation conditions (solid state fermentation and submerged fermentation) on the yield of citric acid from cassava peels was evaluated. Cassava peels were hydrolysed to get reducing sugar using Hydrochloric acid and then inoculated with Aspergillus niger for citric acid production. The parameters of experiments were inoculum concentration (7–11%), fermentation time (1–4 days), temperature (23–39 °C) and ethanol concentration (0–4%). The lowest and highest values of citric acid recorded in solid state fermentation were 2.6 and 4.9 g/l respectfully, while the lowest and highest values for citric acid in submerged fermentation were 0.68 and 1.68 g/l respectfully. Also the results of lowest and highest values of sugar acid ratio observed in solid state fermentation were 6 and 16.04 while the lowest and highest values for sugar acid ratio in submerged fermentation were 1.5 and 7.2 respectively. Only the inoculum concentrations and time played dominant roles in the production of citric acid while all the parameters played active role in the production of sugar-acid-ratio from cassava peels.
  • Thumbnail Image
    Item
    Design, simulation and implementation of a PID vector control for EHVPMSM for an automobile with hybrid technology
    (2019) Adeoye AO; Oladapo BI; Adekunle AA; Olademeji AJ; Kayode JF
    This work proposes a Model design simulation and implementation of a novel engine of an Electric Hybrid Vehicle of Permanent Magnet Synchronous Motor (EHVPMSM) based on field oriented vector control. The experimental analysis was carried out using: automotive motor control MTRCKTSPS5604P, 3-Phase PMSM coded of a single Motor Control Kit with MPC5604P MCU and simulation with Simulink. Therefore, the direct torque control can be obtained by adjusting the magnitude and phase angle of the stator flux linkage to match the vector torque required by the load as fast as possible. This eradicates the stress of charging the vehicle battery. It automatically charges when it is connected to the main supply of the EHVPMSM. The electromagnetic torque can be increased from 0Nm to 6.7Nm in approximately 340μs. The response of speed transient was from −2100rpm to +2100rpm in 100ms of 6.7Nm torque limit. This is a novel way of conserving the energy consumption in a vehicle, which conserves space and weight and minimizes cost as it is simply done with low-cost materials. In this research, a new mathematical model is proposed for the direct and quadrature axis of the current to control the speed mechanism for the engine. Computer simulation ensures experimental validation of the system with a percentage error of 4.5%. The methodology employed to control the system was with the use of various sensors and software controller, this can be easily implemented in industry and institutional laboratory of learning.
  • Thumbnail Image
    Item
    Molecular docking analysis of apigenin and quercetin from ethylacetate fraction of Adansonia digitata with malaria-associated calcium transport protein: An in silico approach
    (2019) Adeoye AO; Olanlokun JO; Tijani H; Lawal SO; Babarinde CO; Akinwole MT; Bewaji CO
    Background The investigation and knowledge of calcium handling mechanisms in the plasmodium has been considered as a potential biological target against malaria. Objective This study deals with the evaluation of inhibitory activity of secondary metabolites of ethylacetate partitioned-fraction of Adansonia digitata stem bark extract on malaria-associated protein using in silico docking studies. Materials and methods Molecular docking and virtual screening was performed to understand the mechanism of ligand binding and to identify potent calcium transporter inhibitors. The stem bark extracts of A. digitata contains rich sources of phytochemicals. The secondary metabolites were determined by HPLC-DAD and HRGC-MS analysis. The major chemical constituent present in the ethylacetate partitioned-fraction of A. digitata stem bark extract were examined for their antiplasmodial activity and were also involved in docking study. Results The secondary metabolites, quercetin and apigenin inhibited the formation of β-hematin. The results showed that all the selected compounds in the A. digitata showed binding energy ranging between -6.5 kcal/mol and -7.1 kcal/mol. Among the two chemical constituents, apigenin has the highest docking score along with the highest number of hydrogen bonds formed when compared to quercetin. Analysis of the results suggests that apigenin and quercetin could act as an anti-malaria agent. Conclusion Molecular docking analysis could lead to further development of potent calcium transporter inhibitors for the prevention and treatment of malaria and related conditions.