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Ajibade, YA, Adeleke MA, Oyetoro OS.  In Press.  Relevance of the pedagogical training programme for lecturers and its challenges in Obafemi Awolowo University, Ile-Ife, Nigeria. Journal of Curriculum and Instruction.
Oginni, FO, Oladejo T, Braimah RO, Adenekan AT.  In Press.  Sublingual epidermoid cyst in a neonate. Annals of Maxillofacial Surgery. 4(1):1.
2021
Aluko, OO, Esan OT, Agboola UA, Ajibade AA, John OM, Obadina OD, Afolabi OT.  2021.  {How secured and safe is the sanitation and hygiene services in a maximum-security correctional facility in Southwest Nigeria: a descriptive cross-sectional study}, jul. International Journal of Environmental Health Research. 00:1–18., Number 00: Taylor & Francis AbstractWebsite

Poorly maintained living conditions and infrastructure are the banes of Nigerian prisons. The study investigated its environmental conditions and the prevalent diseases among inmates. The descriptive, cross-sectional study enrolled 420-inmates through a multistage sampling technique. Pre-tested instruments were administered and results presented with descriptive and logistic regression to identify predictors of toilet-cleaning and handwashing practices at P∝0.05. The mean(±SD) age and modal inmates/cell were 30±7.2 years and 36. Most inmates were males (97%), await-trial (79%) and lives in overcrowded cells (58%). Sixty-nine percent of free-cells has pour-flush toilets and 36% waits for 2–5 minutes before accessing toilets. Fifty-three percent of inmates clean latrines with water and soap, 71% burn solid waste while handwashing period-prevalence was 36%. Religion, toilet-cleaning, and education were predictors of handwashing while types of toilets and access predict toilet-cleaning behaviour. Malaria (81.1%) and scabies (7.3%) were endemic. The prison rehabilitation shall satisfy basic life needs and promote prisoners' health.

Aluko, OO, Obafemi TH, Obiajunwa PO, Obiajunwa CJ, Obisanya OA, Odanye OH, Odeleye AO.  2021.  {Solid waste management and health hazards associated with residence around open dumpsites in heterogeneous urban settlements in Southwest Nigeria}, feb. International Journal of Environmental Health Research. :1–16.: Taylor & Francis AbstractWebsite

The existence and multiplication of open dumpsites (ODs) around residential settlements are associated with environmental health outcomes in urbanizing settlements of developing countries. The study assessed existing practice and perceived health hazards of residence around ODs in Nigerian heterogeneous urban settlements. The cross-sectional, mixed-method study administered a validated questionnaire on 195 respondents using a 4-stage sampling technique. Two focus group discussions (FGDs) were conducted and analysed by ATLAS.ti software. Continuous and categorical variables were respectively presented by means and proportions; associations among variables were determined by chi-square and logistic regression at P$\alpha$<0.05. Seventy-two per cent of the respondents disposed of solid waste in ODs, despite good knowledge (95%) and a positive attitude (85%) on perceived health-hazards. One-sixth (15%) of respondents were willing to pay for waste collection service and 50% considered burning as an alternative to open dumping. The most and least perceived health outcomes were malaria and breathing difficulties. Improved water sources and skin irritations were significant predictors of sound SWM practices.

Adegoke, OJ, Fadeyi FD, Adegoke BF.  2021.  Factors Influencing the Time-On Market of Real Estate Assets in Lagos Metropolis, 7 July. Environmental Design and Management in Collaboration with University of the West of England, Bristol, UK International Conference on Confluence of Theory and Practice in the Built Environment – Beyond Theory into Practice. , Virtual
Adewinbi, S, Busari R, Animasahun LO, OMOTOSO E, Taleatu B.  2021.  Effective pseudocapacitive performance of binder free transparent α-V2O5 thin film electrode: Electrochemical and some surface probing, 2021/11/01. 621:413260. Abstract

Vanadium oxide nanomaterial was successfully prepared on conductive substrate via a simple and facile chemical route with no binder or additive. The film was characterized to investigate its microstructural, optical, electrical and electrochemical properties. The SEM micrographs of the annealed film presented enabling environment that is required for effective photocatalysis. It also demonstrated enhanced interaction between the film and the substrate and adequate pore size distribution that can allow free electrolytic ion intercalation/deintercalation for efficient supercapacitive response. EDX confirmed the elemental composition of the film. XRD and Raman spectroscopy showed substantial characteristic peaks that are attributes of orthorhombic crystal structure of V2O5 powder. Optical studies showed that the film exhibited high visible light transmittance and its energy band gap was found to be 2.77 eV. Pseudocapacitive performance of the V2O5 electrode was investigated via a three-electrode cell configuration. The film electrode exhibited highest areal capacity of 1.18 μAh cm⁻², energy density of 0.485 μWhcm⁻² at a power density of 107.71 μWcm⁻² and current density 0.25 mAcm⁻², moderate charge transfer resistance and superior cycling stability. The study demonstrated the viability of V2O5 film as electrode material for the development of high-performance supercapacitors.

Ojo, S, Okunlola, Aina T, Olugbenga.  2021.  Developing a Decision Support System for the Selection of Appropriate Procurement Method for A Building Project In Nigeria, 2021/09/07. Abstract

In an industry where the choice of a procurement method is haphazard, developing a decision support system to guide clients in their choices is needed. This research work was aimed at developing a framework using the multi-attribute utility approach. Public clients' prioritized factors for cost categories of building types and the suitability of a procurement method achieving a selection criterion (utility coefficients) were established. Then using the weighted sum model (i.e. additive utility), the procurement method with the largest preference value was determined for each cost category and building type. The model revealed that, for a residential project of up to N100 million (Naira) cost category, taken into consideration public clients' priority rating, design – bid – construct (D-B-C) was the most appropriate procurement option. A trend emerged that for a building project of up to N100 million (Naira), the design – bid-construct, was the most appropriate for all building types. While for a building project of above N500 million (Naira), the management contracting was the most appropriate procurement option for all building types.

Eziyi, J, Elusiya J, Olateju O, Amusa Y, Akinpelu V, Eziyi A.  2021.  Tongue Entrapment in an Aluminium Milk Can: An Unusual Cause of Tongue Injury, 2021/09/07. Abstract

Peri-oral injuries are common findings in paediatric patients; however, tongue injury following entrapment in bottles and cans is rare and has not been reported in our locality. A case of a 9- year old previously healthy female child who got her tongue tightly entrapped in an half opened aluminium milk can while in school is hereby presented. This case highlights the result of careless and often dangerous play and misadventures of children and the challenge of management. It calls for vigilance and close supervision of children by caregivers at home and at school. Early presentation, immediate intervention and treatment can prevent grave consequences.

Stephen, O, Gbenu S, Oyedotun K, Fasakin O, Akindoyin G, Shittu H, Fasasi M, Khandaker M, Osman H, Elesawy B, Kasprzhitskii A, Li Z.  2021.  Fabrication and Characterization of Clay-Polyethylene Composite Opted for Shielding of Ionizing Radiation, 2021/09/03. 11:1058. Abstract

This study fabricated and characterized a self-sustaining hydrogenous content clay-polyethylene composite opted for ionizing radiation shielding. Composites designated A–G were fabricated each containing 0–30 wt% of recycled low density polyethylene (LDPE), respectively. To know the effects of the incorporated LDPE on the morphology, microstructural, compressive strength, thermal property and displacement effect on the vital elements were studied using scanning electron microscopy (SEM), X-ray diffractometry (XRD), universal mechanical testing machine, differential thermal analysis (DTA), Rutherford backscattering (RBS) technique and particle induced X-ray emission (PIXE), respectively. The bulk densities of the clay composites ranged between 1.341 and 2.030 g/cm3. The samples’ XRD analysis revealed similar patterns, with a sharp and prominent peak at angle 2θ equals ~26.11°, which matched with card number 16-0606 of the Joint Committee on Powder Diffraction Standards (JCPDS) that represents Aluminum Silicate Hydroxide (Al2Si2O5(OH)4), a basic formula for Kaolin clay. The compressive strength ranged between 2.52 and 5.53 MPa. The ratio of Si to Al in each composite is about 1:1. The dehydroxylation temperature for samples ranged between 443.23 °C and 555.23 °C.

Michael, O, Pitondo-Silva A, Silva L, Santos Ré A, Marcato P, Massaro T, Polizello A, Aires C.  2021.  Effect of Chitosan-Coated Nanostructured Lipid Carrier on Escherichia coli Biofilms, 2021/09/01. 11:1-8. Abstract

Antimicrobial delivery systems are useful tools to control biofilm growth on abiotic surfaces such as urinary catheter. The present study examined whether nanostructured lipid carriers coated with chitosan (NLC-chitosan) affected the growth of uropathogenic biofilms of Escherichia coli. NLC-chitosan was prepared using the emulsion and sonication method, and further characterized with respect to particle size, polydispersity index, and zeta potential. After determining the minimum inhibitory and bactericidal concentrations, E. coli biofilms were grown on catheter specimens (following a preliminary study in which E. coli was found to adhere better to the catheter surface than glass slide and plate). At the 48, 72, 96, and 120 h of growth, they were exposed to 0.9% NaCl solution (negative control), 0.12% chlorhexidine solution (positive control), or NLC-chitosan (final chitosan concentration of 0.28%). After 24 h of treatment, the biofilms were collected to analyze their bacterial viability. NLC-chitosan preparation had bimodal particle size distribution with mean size of 292.9 ± 2.5 nm and polydispersity index of 0.24 ± 0.03 and positive zeta potential (+19.1 ± 0.2) indicating the nanoparticle coating by chitosan. Compared with the control groups, NLC-chitosan affected bacterial viability of biofilms at all ages studied (p<0.05). NLC-chitosan can effectively control the growth of young and mature biofilms of uropathogenic E. coli.

Paulson, K, Kamath A, Alam T, Bienhoff K, Abady G, Abbas J, Abbasi-Kangevari M, Abbastabar H, Abd-Allah F, Abd-Elsalam S, Abdoli A, Abedi A, Abolhassani H, Guimarães Abreu L, Abu-Gharbieh E, Abu-Rmeileh N, I. Abushouk A, Adamu A, Adebayo O.  2021.  Global, regional, and national progress towards Sustainable Development Goal 3.2 for neonatal and child health: all-cause and cause-specific mortality findings from the Global Burden of Disease Study 2019, 2021/08/31. 398 Abstract
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Folayan, M, Oginni A, El Tantawi M, Finlayson T, Adeniyi A.  2021.  Epidemiological profile of early childhood caries in a sub-urban population in Nigeria, 2021/08/23. 21 Abstract
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Folayan, M, Arowolo O, Mapayi B, Chukwumah N, Alade M, Yassin R, El Tantawi M.  2021.  Associations between mental health problems and risky oral and sexual behaviour in adolescents in a sub-urban community in Southwest Nigeria, 2021/08/16. 21 Abstract
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Folayan, M, Olanrewaju I, Brown B, El Tantawi M, Uzochukwu B, Ezechi O, M. Aly N, Abeldaño G, Ara E, Ayanore M, Ayoola O, Osamika B, Ellakany P, Gaffar B, Idigbe I, Ishabiyi A, Jafer M, Khan A, Khalid Z, Nguyen A.  2021.  Differences in COVID-19 Preventive Behavior and Food Insecurity by HIV Status in Nigeria, 2021/08/13. :3. Abstract
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Folayan, M, Olanrewaju I, Brown B, El Tantawi M, Uzochukwu B, Ezechi O, M. Aly N, Abeldaño G, Ara E, Ayanore M, Ayoola O, Osamika B, Ellakany P, Gaffar B, Idigbe I, Ishabiyi A, Jafer M, Khan A, Khalid Z, Nguyen A.  2021.  Differences in COVID-19 Preventive Behavior and Food Insecurity by HIV Status in Nigeria, 2021/08/13. :3. Abstract

The aim of the study was to assess if there were significant differences in the adoption of COVID-19 risk preventive behaviors and experience of food insecurity by people living with and without HIV in Nigeria. This was a cross-sectional study that recruited a convenience sample of 4471 (20.5% HIV positive) adults in Nigeria. Binary logistic regression analysis was conducted to test the associations between the explanatory variable (HIV positive and non-positive status) and the outcome variables-COVID-19 related behavior changes (physical distancing, isolation/quarantine, working remotely) and food insecurity (hungry but did not eat, cut the size of meals/skip meals) controlling for age, sex at birth, COVID-19 status, and medical status of respondents. Significantly fewer people living with HIV (PLWH) reported a positive COVID-19 test result; and had lower odds of practicing COVID-19 risk preventive behaviors. In comparison with those living without HIV, PLWH had higher odds of cutting meal sizes as a food security measure (AOR: 3.18; 95% CI 2.60-3.88) and lower odds of being hungry and not eating (AOR: 0.24; 95% CI 0.20-0.30). In conclusion, associations between HIV status, COVID-19 preventive behaviors and food security are highly complex and warrant further in-depth to unravel the incongruities identified.

Folayan, M, Ibigbami O, Brown B, El Tantawi M, Uzochukwu B, Ezechi O, M. Aly N, Abeldaño G, Ara E, Ayanore M, Ayoola O, Osamika B, Ellakany P, Gaffar B, Idigbe I, Ishabiyi A, Jafer M, Khan A, Khalid Z, Nguyen A.  2021.  Differences in COVID-19 Preventive Behavior and Food Insecurity by HIV Status in Nigeria, 2021/08/13. :3. Abstract

The aim of the study was to assess if there were significant differences in the adoption of COVID-19 risk preventive behaviors and experience of food insecurity by people living with and without HIV in Nigeria. This was a cross-sectional study that recruited a convenience sample of 4471 (20.5% HIV positive) adults in Nigeria. Binary logistic regression analysis was conducted to test the associations between the explanatory variable (HIV positive and non-positive status) and the outcome variables-COVID-19 related behavior changes (physical distancing, isolation/quarantine, working remotely) and food insecurity (hungry but did not eat, cut the size of meals/skip meals) controlling for age, sex at birth, COVID-19 status, and medical status of respondents. Significantly fewer people living with HIV (PLWH) reported a positive COVID-19 test result; and had lower odds of practicing COVID-19 risk preventive behaviors. In comparison with those living without HIV, PLWH had higher odds of cutting meal sizes as a food security measure (AOR: 3.18; 95% CI 2.60-3.88) and lower odds of being hungry and not eating (AOR: 0.24; 95% CI 0.20-0.30). In conclusion, associations between HIV status, COVID-19 preventive behaviors and food security are highly complex and warrant further in-depth to unravel the incongruities identified.

Ameye, S, Ikoko M, Awoleye M, Eziyi J.  2021.  Evaluation of the performance of machine learning algorithms applied to voice parameters in prioritizing candidate for office laryngoscopy: Automated triaging in focus, 2021/07/30. 11:169-175. Abstract

Background: We examined the performance of different Machine Learning Algorithms while also comparing two methods of voice assessment to look at the workability of automating triage of patient that will need prompt office laryngoscopy. Methods: We recruited consecutive adult subjects excluding those with a history of being regular singers or choristers in the past one year and those with the previous history of laryngeal trauma. We then carried out the perceptual voice assessments on the GRBAS Scale and also obtained the basic acoustic parameters of the voice samples. Laryngeal examinations with 70-degree Hopkins’ Rod were then carried out by another examiner for all the participants to identify gross laryngeal changes or lesions. We then evaluated each machine learning algorithm comparing the perceptual and acoustic parameters in determining how well each algorithm predicts the presence of those categorized with having lesion or not by the laryngeal examination. Results: One hundred and twenty respondents were analyzed out of which 89(74.2%) were females. The mean age was 46.5 ± 9.2 years. The perceptual evaluation generally outperformed the acoustic evaluation. Also, the Naïve Bayes Classifier (NBC) outperformed other algorithms with a F1 score of 0.55 followed by Artificial Neural Network (ANN) with the score of 0.53. However, the ANN outperformed the other with regards to the Area-under-the-curve (AUC). Conclusion: When these metrics are taken together, the ANN still remains the best algorithm for this dataset. We are however cognisance of the needed improvement to the various aspects of this work including a larger dataset more scientific sampling.

Adewinbi, S, Taleatu B, Maphiri V, Fasakin O, OMOTOSO E, Oyedotun K, Manyala N.  2021.  Characterization of two-way fabricated hybrid metal-oxide nanostructured electrode materials for photovoltaic and miniaturized supercapacitor applications, 2021/07/27. 119:106699. Abstract

Portable electronic devices require a small volume self-powered energy system that can combine fabrication of energy harvesting and storage devices in one plane. This study focuses on fabricating novel all-oxide photovoltaic and supercapacitor devices based on MoO 3 , V 2 O 5 , and Co x O y thin electrodes prepared by a two-electrode cell arrangement. The fabricated devices were tested using solar simulator and potentiostat at ambient temperature. The power conversion efficiencies of the fabricated photovoltaic devices were found in the range of 0.17-0.39% depending on buffer layer characteristics. It therefore suggests that V 2 O 5 and MoO 3 can buffer photovoltaic processes by lowering the conduction band offset in the proximate Co x O y absorber. Pseudocapacitive behavior of MoO 3 /Co x O y ||MoO 3 /Co x O y and V 2 O 5 /Co x O y ||V 2 O 5 /Co x O y planar devices showed that they delivered maximum specific areal capacity values of 0.694 and 0.778 μAhcm − 2 respectively at discharge current density of 0.1 mAcm − 2. They also showed considerably low reduction in energy density (about 38.7%) even at a remarkable increase in power density of about 450% (at a high current density of 1.0 mAcm − 2). In addition, the symmetric microsupercapacitors showed excellent retention of capacity even after 5000 cycles. These results generally indicate the reliability of the fabricated devices in the development of portable electronic components for energy application.

Folayan, M, Olanrewaju I, El Tantawi M, Brown B, M. Aly N, Ezechi O, Abeldaño G, Ara E, Ayanore M, Ellakany P, Gaffar B, Al-Khanati N, Idigbe I, Ishabiyi A, Jafer M, Khan A, Khalid Z, Lawal F, Lusher J, Nguyen A.  2021.  Factors Associated with Financial Security, Food Security and Quality of Daily Lives of Residents in Nigeria during the First Wave of the COVID-19 Pandemic, 2021/07/27. 18:7925. Abstract
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Folayan, M, Ibigbami O, El Tantawi M, Brown B, M. Aly N, Ezechi O, Abeldaño G, Ara E, Ayanore M, Ellakany P, Gaffar B, Al-Khanati N, Idigbe I, Ishabiyi A, Jafer M, Khan A, Khalid Z, Lawal F, Lusher J, Nguyen A.  2021.  Factors Associated with Financial Security, Food Security and Quality of Daily Lives of Residents in Nigeria during the First Wave of the COVID-19 Pandemic, 2021/07/27. 18:7925. Abstract

An online survey was conducted to identify factors associated with financial insecurity, food insecurity and poor quality of daily lives of adults in Nigeria during the first wave of the COVID-19 pandemic. The associations between the outcome (experience of financial loss, changes in food intake and impact of the pandemic on daily lives) and the explanatory (age, sex, education level, anxiety, depression, HIV status) variables were determined using logistic regression analysis. Of the 4439 respondents, 2487 (56.0%) were financially insecure, 907 (20.4%) decreased food intake and 4029 (90.8%) had their daily life negatively impacted. Males (AOR:0.84), people who felt depressed (AOR:0.62) and people living with HIV -PLHIV- (AOR:0.70) had significantly lower odds of financial insecurity. Older respondents (AOR:1.01) had significantly higher odds of financial insecurity. Those depressed (AOR:0.62) and PLHIV (AOR:0.55) had significantly lower odds of reporting decreased food intake. Respondents who felt anxious (AOR:0.07), depressed (AOR: 0.48) and who were PLHIV (AOR:0.68) had significantly lower odds of reporting a negative impact of the pandemic on their daily lives. We concluded the study findings may reflect a complex relationship between financial insecurity, food insecurity, poor quality of life, mental health, and socioeconomic status of adults living in Nigeria during the COVID-19 pandemic.

Maphiri, V, Rutavi G, Sylla N, Adewinbi S, Fasakin O, Man-Yala N.  2021.  Novel Thermally Reduced Graphene Oxide Microsupercapacitor Fabricated via Mask-Free AxiDraw Direct Writing, 2021/07/27. 11:1909. Abstract

We demonstrate a simple method to fabricate all solid state, thermally reduced Graphene Oxide (TRGO) microsupercapacitors (µ-SCs) prepared using the atmospheric pressure chemical vapor deposition (APCVD) and a mask-free axiDraw sketching apparatus. The Fourier transform in-frared spectroscopy (FTIR) shows the extermination of oxygen functional groups as the reducing temperature (RT) increases, while the Raman shows the presence of the defect and graphitic peaks. The electrochemical performance of the µ-SCs showed cyclic voltammetry (CV) potential window of 0-0.8 V at various scan rates of 5-1000 mVs −1 with a rectangular shape, depicting characteristics of electric double layer capacitor (EDLC) behavior. The µ-SC with 14 cm −2 (number of digits per unit area) showed a 46% increment in capacitance from that of 6 cm −2 , which is also higher than the µ-SCs with 22 and 26 cm −2. The TRGO-500 exhibits volumetric energy and power density of 14.61 mW h cm −3 and 142.67 mW cm −3 , respectively. The electrochemical impedance spectroscopy (EIS) showed the decrease in the equivalent series resistance (ESR) as a function of RT due to reduction of the resistive functional groups present in the sample. Bode plot showed a phase angel of −85° for the TRGO-500 µ-SC device. The electrochemical performance of the µ-SC devices can be tuned by varying the RT, number of digits per unity area, and connection configuration (parallel or series).

Folayan, M, Obiyan M, El Tantawi M, Kemoli A, Al-Batayneh O, Gaffar B, Schroth R.  2021.  An ecological study on the association between early childhood caries and intimate partner violence in 20 low- and middle-income countries: 2007-2017, 2021/07/26. 4:39. Abstract
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Adedoja, O, Samways M, Kehinde T.  2021.  Age class of alien tree stands retained for mammal protection have differential effects on flower-visiting insect assemblages, 2021/07/10. Abstract

• Limited sunlight reduces plant productivity and foraging activities of pollinators, such as when alien trees shade out native flowering plants. The conservation management response is to remove the impoverishing effect of the alien tree canopy. However, alien trees can provide benefit for certain species when they provide significant scarce resources. We assess how flower-visiting insects respond to shading from young, small-sized, open canopy vs. mature, tall, closed-canopy alien pine trees retained specifically as refuges for certain rare mammals.• We sampled flower–visitor species diversity and interactions at various distances from pine stands of both sizes in a matrix of low sclerophyllous natural vegetation. We sampled flower–visitors using coloured pan traps and estimated flower–visitor interactions and flower diversity.
• Reduction in percentage light reaching the understorey significantly reduced flower abundance, with zero flowers in tall pine understorey. Flower–visitor species composition differed across sampling locations with increasing distance from tall pine understorey. Although pine tree size led to a decline in flower–visitor interaction frequency and network specialisation in all pine tree stands, some bee species that are mostly tree nesters, were observed in unique interactions in association with tall pines only.
• We show that alien pines, especially tall trees, have an impoverishing effect on flowering plants and flower–visitors. However, these trees also confer benefit to specialised groups such as tree-nesting bees. While active alien pine removal is encouraged where the trees are actively invading, maintaining well-contained small stands is of value for two different taxa of conservation concern.

Jegede, T, Tunde-Ayinmode M, Jegede T, Akinsulore A, Ibigbami O.  2021.  Bullying Behavior Roles and Mental Health Correlates Among Secondary School Students in Ilesa, Nigeria, 2021/07/01. Abstract

Objective: Bullying behaviour is pervasive, cuts across age group, transcends geographical location and its impacts include but not limited to physical or academic snags. The objective of the study is to determine bullying roles and their association with emotional or behavioural problems among adolescents in Ilesa, Nigeria. Methods: A cross-sectional study was performed on 432 senior secondary school students (12-18 years old) in Ilesa (Nigeria). Peer Relationship Questionnaire was used to determine bullying roles and the Strength and Difficulty Questionnaire to measure behavioural problems. Results: Prevalence of bullying behaviour is high. The bully-victims had the highest means score on all subscales except pro-social. Similarly, the bully-victims was significantly associated with all subscales of the SDQ except the pro-social problems at (P< .001), (P=.024), (P= .004), (P= .004), and (P< .001) for conduct, emotional problem, hyperactivity problem, peer relationship problem and the total difficulty score respectively. Conclusion: This shows that participating in bullying behaviour irrespective of the role played increases the likelihood of psychological consequences, especially the bully-victim. There is a need to establish anti-bullying programs in schools to curb this menace and its mental health consequence.