bluuebunny/crossref_metadata_2025_split huggingface dataset:
Phytochemical and Proximate Analysis of African Oil Bean (Pentaclethra macrophylla Benth) Seed
Authors: Akinlabu D.K. , Owoeye T.F. , Owolabi F.E. , Audu O.Y. , Ajanaku C.O. , Falope F. , Ajani O.O. 
Published: December 2019

Abstract
Medicinal plant research is a highly diversified topic of interest owing to applications of their phytoconstituents in drug discovery, human dietary intake, corrosion inhibition, material science research among others. The study revealed the phytochemical composition and proximate determination of Pentaclethra macrophylla benth (African oil bean) seed. The dried seeds of Pentaclethra macrophylla benth were pulverized into fine powder and a portion of it was extracted with n-hexane. The result of the phytochemical screening of the extract from Pentaclethra macrophylla showed that the oil seeds contained terpenoids, cardiac glycosides and saponin while steroids, alkaloids, flavonoids, tannins, phlabotannins and anthraquinones were not detected. Proximate analysis indicated low moisture content (1.895 %), while other parameter determined include ash (2.033%), crude fibre (17.227%), acid value (8.182), iodine value (101.235), peroxide value (20.06), and free fatty acid (4.091). This extract is a candidate with potential for further study regarding unveiling of their mechanical properties for technological advances.
Numerical Analysis of Flow Induced Vibrations of a Low-Pressure Steam Turbine Rotating Blade
Authors: Molale T. , Ahmed N. , Bhamjee M. 
Published: December 2019

Abstract
This paper presents the results of a numerical synthesis and characterization of vibrations of low-pressure steam turbine last stage rotating blades. A Fluid Structure Interaction (FSI) study is carried out using ANSYS Fluent 18.1 and ANSYS Mechanical 18.1. Using a one way coupling between ANSYS Fluent and ANSYS Mechanical, it was possible to link the two systems and allow pressure force calculations from Fluent to be used for the blade excitation in ANSYS Mechanical. The result of simulation shows that the blade exhibits vibrations which are characterized by amplitude modulation. An approximation for the equation of motion along the axial, radial and tangential direction was uncovered and fit. The three approximations for the blade vibration show a good agreement with results from ANSYS Mechanical. The effect of liquid mass (droplets) in the flow in the blade vibration was also investigated numerically. It is shown that increase in liquid mass is directly correlated with increase in the amplitude of the vibrations but has no effect on the frequency of the vibrations.
Analyses of the Gravimetric and Electrochemical Effects of C16H13N3O3 on Mild Steel Corrosion in 0.5 M H2SO4
Authors: Edoziuno Francis O. , Odoni Benjamin U. , Adediran Adeolu A. , Okeniyi Joshua O. , Akinlabi Esther T. 
Published: December 2019

Abstract
This study analyzed the gravimetric and electrochemical effects of C16H13N3O3 (methyl-5-benzoyl-2-benzimidazole carbamate: Mebendazole) on mild steel corrosion in 0.5 M H2SO4, for gaining insights on correlation and significance of differences between the two corrosion-monitoring techniques. For the gravimetric method, weight loss of mild steel specimens immersed in different C16H13N3O3 concentrations mixed in the 0.5 M H2SO4 were obtained for corrosion rates and inhibition efficiencies estimations. For the electrochemical approach, mild steel samples were subjected to potentiodynamic polarization experiments in the different C16H13N3O3 concentrations in 0.5 M H2SO4 that were employed for the gravimetric technique for obtaining instrumental readout of corrosion rate. Results showed that the corrosion rate from the electrochemical experiments exhibited excellent linear correlation (R = 99.91; Nash-Sutcliffe Efficiency = 99.83) with the dataset obtained from the gravimetric corrosion assessments. Both the gravimetric and electrochemical monitoring of mild steel corrosion gave inhibition efficiencies, η > 90%, by the different C16H13N3O3 concentrations for the study. Also, homeoscedastic and heteroscedastic student’s t-test statistics indicated that the differences between the corrosion inhibition efficiencies from the electrochemical and gravimetric techniques were not significant, p-value = 0.9729, but significant for their corrosion rates: 1.52 × 10–6 > p-value > 8.15 × 10–9.
Investigation of Influence of Coaxial Antenna Slot Positioning on Thermal Efficiency in Microwave Ablation using COMSOL
Authors: Towoju Olumide , Ishola Felix , Sanni Timilehin , Olatunji Obafemi 
Published: December 2019

Abstract
Continued development of the minimum invasive interventional technology in recent years has proven ablation therapy to be a safe and effective local treatment for cancers and has become increasingly important in the medicine. This is the reason for its preference for treating larger tumors than for radiofrequency ablation. The authors studied the influence of the geometry of the antenna used on the efficiency of the procedure to obtain a thermal lesion at the site of the tumor. The influence of the position of the coaxial antenna on the extent of the thermal lesion at the site of the tumor was investigated numerically by varying the distance from the position of the end of the antenna with COMSOL Multiphysics as the modeling tool. The coaxial antenna investigated has a 1.79 mm diameter range with a center conductor of 0.29 mm diameter and Tefzel ETFE as the material of the catheter. The power of the coaxial antenna was optimized with a slot spacing of 6 mm from the tip of the antenna. The total power dissipation density, and thus the degree of thermal damage generated during the process was found to depend on the position of the slots of the coaxial antenna.
Phenomenological Model Development of Percentage Protein Present in Fermented African Locust Beans Seed
Authors: Elizabeth Ojewumi Modupe , James Omoleye Abiodun , Adetutu Ajayi Adesola , Temitayo Oyekunle Daniel , Ayodele Ayoola Ayodeji 
Published: December 2019

Abstract
The optimum conditions for the fermentation of a local legume known as African locust bean (Parkia biglobosa) into a vegetable protein based food condiment or spice (Iru) were developed using Levenberg-Marquardt (or Powell) method (using PSI software) with three (3) variables namely; inoculum concentration (bacillus subtilis), temperature and the fermentation duration. P. biglobosa seeds were fermented at various temperature of 40 - 70 °C for five days (120 hours) with different concentrations of Inoculum. The proximate analysis shows that fermentation increased the percentage protein. Protein had the highest composition with about 51 % after 72 hours at the lowest fermentation temperature of 40°C.
Surface Protection of Carbon Steel with ZrO2 Composite Induced Zinc Based Electrolytic cell via Electrodeposition Technique
Authors: Fayomi O. S. I. , Joseph O.O. , Fashola O. J. , Popoola A.P.I. , Loto C.A. , Samuel O.D. , Banjo S.O. , Akande I.G. , Joshua T.O. , Abdulwahab M. , Babalola O.P. , Ademuyiwa F. , Ayoola A. A. , Sanni T. , Fayomi J. 
Published: December 2019

Abstract
The effect of Zirconium dioxide (ZrO2) as additive to Zn-MgO electrolytic chemical bath coating by co-deposition on carbon steel was investigated. Weight loss was conducted on the electrodeposited mild steel and it was inspected. The anti corrosion properties were assessed by linear polarization procedure in 1 mole of HCl medium. From the results gotten, all deposited coatings displayed significant improvement. An amazing improvement was accomplished in every one of the coatings as against the as-received sample. Zn-MgO-ZrO2 (0.8V) with the best performing coating showing an upgrade indicates enhanced anti-wear and friction qualities displaying wear resistance improvement.
Inventory replenishment in multi-stage production setting under stochastic demand: a review
Authors: Ongbali Samson O , Afolalu S. A , Fayomi Ojo S , Oladipupo S 
Published: December 2019

Abstract
Inventory management is central to production planning and control particularly in multi-stage production environment where production output is stochastic and customer demand is also stochastic. Surplus inventory ties down money and stock-out situation result in loss of value and goodwill. Therefore, it is necessary determine optimal inventory policies for different manufacturing scenarios to maintain a balance between safety stock inventory and customer demand satisfaction at all time. Consequently, this review attempts to identify and document the underlying trends and most recent methods of inventory replenishment under stochastic demand with emphasis on multi-stage production setting. Prominent in literature among the models used to treat inventory problem in stochastic demand situation is “Approximation by Probabilistic Distribution”. Other models used include, Genetic Algorithm (GA), Just-in-time with Kanban simulation, Markov Process Decision, Fuzzy Inventory Model, Multi-stage inventory-queue model and Demand forecasting among others. It appears that there exist only approximate solutions than exact solutions in solving stochastic demand inventory problem suggesting that there is need for more work to be done in the area toward achieving exact solutions to the problem than approximation.
Prediction of the elastic behaviour of HDPE/SWCNTs nanocomposites with FEM approach
Authors: Tebeta R.T. , Fattahi A.M. , Ahmed N.A. 
Published: December 2019

Abstract
Prediction of elastic behaviour of polymer-based nanocomposite using finite element method (FEM) has attracted the attention of many researchers in the past few years. In this study, ANSYS 19.2 software was used to predict the elastic modulus of high-density polyethylene (HDPE) reinforced with single-walled carbon nanotubes (SWCNTs) at different weight fractions. Three-dimensional (3-D) representative volume element (RVE) was created by FEM using ANSYS software to estimate the elastic modulus of HDPE based nanocomposite reinforced with SWCNTs nanoparticles at 0.2 wt%, 0.4 wt%, 0.6 wt%, 0.8 wt%, and 1 wt% weight fractions. To present the FEM model for predicting the elastic modulus of HDPE/SWCNT nanocomposite, the results from atomic modelling were extracted and used for properties of matrix and fibre interface. The interfacial region was used in the model to separate the conditions of load transfer between the HDPE matrix and SWCNT fibre. Two density fractions of HDPE/SWCNTs nanocomposite were also used in terms of two different densities for both HDPE and SWCNT to investigate their effect on the elastic modulus. The modelling results showed that the increase of weight fraction of single-walled carbon nanotubes (SWCNTs) results with the increase of relative elastic modulus of the nanocomposite. The results also showed that the elastic modulus of low-density fraction HDPE/SWCNTs nanocomposite improves more compared to one of the high-density fractions at the same SWCNTs weight fraction. Rule of the mixture was also used to predict the elastic behaviour of HDPE/SWCNT nanocomposite and the results were compared to those of the FEM model for validation.
Reconnaissance Study of Smectite ores of Lafarge- Ewekoro, Ogun State Nigeria for Industrial Applications
Authors: Inegbenebor A. O. , Inegbenebor A. I. , Ajayi E. I. , Aladesuyi O. , Ogunleye O. M. , Fayomi O. S. I. , Babalola P. O. , Omoleye A. J. , Boyo H. I. , Adebesin A. A. 
Published: December 2019

Abstract
This work aimed to study the aluminosilicate ore contents at Lafarge Ogun State environ as a means of identification of background variation of smectite in the ore-bodied environment. Smectite clay samples (bentonite) were collected from Larfarge Ewekoro environ, while zeolite used as a standard in this work was obtained from Petroleum Department of Covenant University for comparism purpose. The samples were digested with nitric acid, HNO3 and hydrochloric acid, HCl, after which the digested samples were characterized with, ultraviolet visible (UV-VIS), scanning, absorbance; and % transmittances. The results revealed similarity in ultraviolet visible for bentonite and zeolite with predominance of iron in bentonite samples. The colouration of bentonite due to the presence of transition metals in the environment under study could be of industrial uses in the manufacture of coloured wares and tiles, and magnetic ceramic, though further pre-application specific investigations are recommended. Also, the observed properties favour many aspects of industrial applications such as in pharmaceuticals, refractories, adhesives and porcelain wares. These will help in setting up small and medium-sized enterprise in this area resulting in employment creation and revenue generation.
Stabilizing Wave Attenuation Effects In High-Speed Metal Cutting
Authors: Ozoegwu C. G. , Chukwuneke J.L. , Okokpujie I.P. , Babaremu K. O. 
Published: December 2019

Abstract
Theory of chatter-suppressing wave attenuation effects in high-speed metal cutting process is presented in this work. Analysis shows that rise in natural frequency of cutting tool leads to rise in the wave attenuating forces. This result leads to the postulation that rise in natural frequency suppresses high-speed chatter instability. The theory is based on the assumption of very short free-flight of cutting tool, and shown to fail when this assumption is violated. The concluding opinion becomes that the resistance of a high-speed tool to chatter stems from both structural damping and wave attenuation effects.
GatingPractices in Nigerian Research and Training Institutes: Case Study of Lagos State
Authors: Adefuye O. A , Orisaleye J.I , Lawal O.I , Fadipe O. L 
Published: December 2019

Abstract
Foundry practice have existed in Nigeria for centuries. However, for the development of the practice, know-how and skills must be developed. Personnel must be trained at all levels. In this study, the practices in foundries of research and academic institutions involved in foundry within Lagos state were investigated. Investigations were carried out by on-site study of the foundries and also by means of questionnaires investigating various aspects of foundry practice. From responses obtained, it was shown that the capacity of foundries to produce technically sound castings is very low. Simple steps capable of increasing the quality and reproducibility of the castings were suggested. It was concluded that students’ learning and local foundry practice can be enhanced by upgrading foundries in research and educational institutions to current global best practices.
Designing Optimized Organic Rankine Cycles Systems for Waste Heat-to-Power Conversion of Gas Turbine Flue Gases
Authors: Fakeye A.B. , Oyedepo S. O. 
Published: December 2019

Abstract
The focus of this work is to develop a flexible ORC design procedure that compares thermo-economic performances of simple and recuperative ORCs for both subcritical and supercritical cycles through a multi-objective optimization that relates the economic parameters to the network output for waste heat-to-power conversion of exhaust gases. Few researches have proposed rather simpler methods by modifications to the Jacob number (Ja) but these are insufficient to make technical and economic decisions on the subject matter as Ja is only appropriate for comparing performances of different working fluids at the same operating condition. Coupled with the barrier on the minimum temperature the exhaust gases from power plants may attain, the use of Ja as the only criteria is not sufficient for varying operating condition presented by Gas Turbine power plants. Hence, this review presents follow-through numerical methodology for designing adapted ORC for waste heat-to-power energy conversion.
Microstructure and anti-corrosion properties of near equi-atomic Ti25Si25Al20Mo20Ni10 High Entropy Alloy synthesized via Spark Plasma Sintering
Authors: Kanyane L. R. , Malatji N. , Popoola A.P.I , Fayomi O.S.I 
Published: December 2019

Abstract
Materials operating at extreme conditions where they are exposed to corrosive environment can be realised in everyday applications. Suffer from corrosion due to acidic environment is still a challenge. Efforts have been made in material design to produce a suitable chemical plants material which can resist corrosion. High Entropy Alloys (HEAs) have been reported to exhibit enhanced mechanical and corrosion properties even at elevated temperatures. In this work, Al20Ti25Si25Mo20Ni10 HEA with outstanding corrosion and microhardness properties was developed by means of spark plasma sintering technique (SPS) was synthesized. The effect of sintering temperature was investigated on microstructure, densification, microhardness and corrosion resistance properties of the synthesized alloy. The microstructural evolution and phase identification were characterized using the scanning electron microscope (SEM) equipped with the energy dispersive spectroscopy (EDS) and X-ray diffractometer (XRD) respectively. Ordered FCC and BCC systems were identified along with clearly defined crystal grains along with Mo, Ti and Si rich regions. No cracks or initiation of stress were revealed from the microstructures. Maximum relative densities of 98.4% resulted in microhardness of 960.09 HV were achieved at sintering temperature of 1000°C. The Ti25Si25 Al20Mo20Ni10 HEA fabricated at 1000°C displayed a higher polarization value of 3477 Ω.
Seismic Retrofitting: A preparatory approach against the forecasted quakes in the South-Western Part of Nigeria.
Authors: Oluwafemi John , Ede Anthony , Ofuyatan Olatokunbo , Bankole Deborah , Oyebisi Solomon , Atoyebi Olumoyewa 
Published: December 2019

Abstract
The seismic record of Nigeria shows the occurrences of quakes that range from small to medium magnitude as against the belief of some people that Nigeria is aseismic. Researchers in Nigeria have also recently raised alarm that devastating earthquake is likely to be experienced in the nearest future with attention drawn to the south west in Nigeria. The historical seismic data as published in this work had the sizes of quakes presented using the intensity scale. To further give us clarity into the actual sizes of the documented quakes, the intensities were converted to local magnitudes, hence the minimum and maximum quakes ever witnessed in Nigeria were ascertained to be 3.3Ml and 6.5Ml. In response to the seismic alerts and forecast results targeted at the south-west region of Nigeria, seismic retrofitting is recommended for the existing structures along the seismic fault in the south west while the response results published in the works of [1] is recommended as guides to the designs of subsequent structures along the fault in the south west so as to establish safety just if the forecasted quake is experienced.
Inhibition of Mild Steel Corrosion using Binary Mixture of Sesame and Castor Oil
Authors: Oguntade Tomiwa I. , Ita Christiana S. , Oyekunle Daniel T. , Oni Tobi P. , Ojo Temiloluwa , Ekere Isaac E. 
Published: December 2019

AbstractMild steel is utilized as a prominent metal in the construction of equipment’s such as pipes and storage tanks in the oil and gas industry. It is vulnerable to a high rate of corrosion attack which has led to great losses and damages in the industry. The effect of corrosion attack on mild steel have continued to create a global interest on a means of controlling it. Different research have reported different ways of preventing corrosion, one of which involves the application of inhibitors on these structures. Previous research works have demonstrate the use of corrosion inhibitors as an effective means of reducing corrosion rate. This research study was to explore the efficiency of the binary mixture of castor and sesame oil as an organic corrosion inhibitor at different concentration of brine, volume of binary inhibitor and time. Minitab 17 was used as an optimization tool for the experimental procedure. The highest corrosion rate of 42.20 mm/yr was observed at 0.7 M brine solution, 19 mL volume of the binary inhibitor, over a period of 21 days. The lowest corrosion rate (3.01 mm/yr) was observed at 0.7 M brine solution, 23 ml of binary inhibitor and at 13 days. The results shows that the binary mixture of both castor and sesame oil is an effective and efficient organic inhibitor used in controlling corrosion.
Correlated respiratory indicators of Household waste burning practices in Lugbe – Abuja, Nigeria.
Authors: Igibah E.C. , Agashua L. O. , Sadiq A. A. 
Published: December 2019

Abstract
The household waste burning practice and effects of the waste burning emission on respiratory health of the populace in the Lugbe, Abuja happens regularly, though not well recorded. The aim of the study was to quantify the waste burning occurrence as well as investigate the correlation between waste burning practice and respiratory problem in Northern Nigeria with Lugbe as case study since is an example of country side settlement growing to urbanites. Questionnaire was utilized to accumulate information from houses in Lugbe - Abuja. Total of 60 participants were enrolled and their responses on household waste burning besides respiratory symptoms were investigated. The contributors stated that their neighbors burn waste habitually, with 43.5% and 32.4% of them from the central and rural zone respectively. The local waste authorities gathered garbage from 84.5% of these contributors once per week in the enlightened zone and central but rural is once monthly or not at all. The prevalent lower respiratory sign connected with waste burning was dehydrated cough (31.4%). For Lower and Upper health signs, the participants who participated in the practice of waste burning had a faintly higher prevalence of breath shortness (57%) and Water itchy eyes (49%) respectively. For each of lower and upper health signs, the trend is such that 6 months above is greater than immediately, which is greater than those of a month after. These results indicate that waste or bush burning impact on health is on the long – term basis.
The Effect of Evaporative Cooling System on the Storage of Citrus (Sweet Orange)
Authors: Babaremu K.O , Adekanye T.A , Okokpujie I.P , Omodara M.A , Fayomi J 
Published: December 2019

Abstract
Postharvest losses have been a very perpetual challenge facing the agricultural industries as most produce get spoilt after harvest owing to poor postharvest handlings. Several attempts have been made to eliminate this challenge ranging from transportation, packaging and storage. The panacea to this problem is still much work in progress. However, a developed cooler with a cooling efficiency of 86.01% which was immensely able to salvage the rapid deterioration challenge of fruits as ascertained through a seven days concurrent storage of sweet oranges in a cooler and ambient. The result shows that the cooler successfully improved the shelf life of the stored produce with about 4% weight loss of the stored citrus compared to the 9% weight loss of the ambient storage.
Design and Construction of a Pedal-Power Grinding mill
Authors: Stephen Oluwashola Akande , Mercy Ayodele 
Published: December 2019

Abstract
A pedal-power grinding mill has been designed and constructed. The machine is made of a chain drive mechanism. This mechanism is made up of sprocket, gear, pedal, chain, bearings, grinding disks, shaft and hopper for receiving the product to be milled. The pedal is used for generating torque for rotating the shaft and the grinding disk. This machine was designed as a low-cost solution for either no or inadequate electricity power supply from the electricity distribution company in the rural area and in some urban centers of Nigeria and other developing countries. The developed machine is economically viable and will reduce drudgery in using hand cranking for grinding agricultural product such as yam to produce yam flour, pepper, tomatoes, etc. The machine was observed to be effective in grinding tomatoes and can also be used for grinding other agricultural product.