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Oke, MO, Martins O, Idowu OA, Fabiyi FD.  Submitted.  DETERMINATION OF RAINFALL - RECHARGE RELATIONSHIP IN ONA RIVER BASIN USING SOIL MOISTURE BALANCE METHOD. Ife Journal of Science. 16(2)oke_mo_et_al_9.pdf
Oyetola, EO, Okunola IE, Adedigba MA, Nwhator SO, Soyele OO, Fadeju AD, Owotade FJ.  Submitted.  Oral health practices and oral hygiene status of undergraduate students at Ile-Ife, Nigeria. Nigerian Journal of Health Sciences. 16:76–81., Number 2 Abstract
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Olajokun Racheal, E, Babatunde OW, Farancisca AO, Ayobami AE.  Submitted.  The Prevalence of Urinary Catheter Related Infections in Federal Medical Centre Abeokuta Nigeria. Abstract
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Nabie, MJ, Sofo S, Afolabi MO, Afolabi ERI, Faleye BA.  Submitted.  Unizulu International Journal of Education. Abstract
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2021
Famurewa, BA, Oginni FO, Adewara BA, Fomete B, Aniagor C, Aluko-Olokun B, Morgan RE, Amedari MKI.  2021.  Epidemiology of Blindness From Facial Trauma: A Multi-Centre Nigerian Study, dec. Craniomaxillofacial Trauma {&} Reconstruction. :194338752110609.: {SAGE} Publications AbstractWebsite
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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
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.

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.

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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Amarquaye, G, Arrow P, Bansal K, Bedi R, Campus G, Chen KJ, Chibinski A, Chinzorig T, Crystal Y, Duangthip D, Ferri M, Folayan M, Garidkhuu A, Hamama H, Jirarattanasopa V, Kemoli A, Leal S, Leelataweewud P, Chu C-H.  2021.  Global Oral Health Policies and Guidelines: Using Silver Diamine Fluoride for Caries Control, 2021/07/01. 2:685557. Abstract
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Sarfo, F, Akpa O, Ovbiagele B, Akpalu A, Wahab K, Komolafe M, Obiako R, Owolabi L, Osaigbovo G, Jenkins C, Ogbole G, Fakunle A, Tiwari H, Arulogun O, Arnett D, Asowata O, Ogah O, Akinyemi R, Owolabi M.  2021.  Influence of age on links between major modifiable risk factors and stroke occurrence in West Africa, 2021/07/01. 428:117573. Abstract
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Faniyi, I, Olofinjana B, Fasakin O, Ajenifuja E, Alo F, Eleruja M, Ajayi E.  2021.  Effects of graphene oxide and reduced graphene oxide on thermal and mechanical properties of expanded polystyrene-based composites, 2021/06/01. 44 Abstract

Graphene oxide (GO) acts as an insulator but when reduced to reduced graphene oxide (RGO), it has high heat storage capacity. This can result in lowering the phase change temperature when embedded in a material such as expanded polystyrene (EPS), thus making it a good heat-resistance material. In this study, the thermal and the mechanical effects of GO and RGOs over EPS were analysed. GO was synthesized using modified Hummer’s method, while the reduction process was taken through different routes using three different reductants: hydrazine (RGO-HZ), ascorbic acid (RGO-AA) and the extract of Amaranthus hybridus (RGO-AH). The same content of graphite and its derivatives were separately and chemically bonded together with EPS forming composites (i.e., graphite composite, GO composite, RGO-HZ composite, RGO-AA composite and RGO-AH composite) and cast on a mould at room temperature to form a dog-bone shape. Fourier transform infrared spectroscopy, differential thermal analysis, scanning electron microscopy and mechanical tests were conducted on ordinary EPS and on each of the composite samples. The results showed a significant enhancement of thermal and mechanical properties of the composites over ordinary EPS.

Mahmoud, B, Mirghni A, Oyedotun K, Fasakin O, Manyala N.  2021.  Nanoplatelets ammonium nickel-cobalt phosphate graphene foam composite as novel electrode material for hybrid supercapacitors, 2021/06/01. 883:160897. Abstract

Nanoplatelets NH4(NiCo)PO4·H2O and NH4(NiCo)PO4·H2O/GF composites were synthesized through a hydrothermal approach and used as actively positive electrode for hybrid supercapacitor. Electrochemical performances of the samples were carried out in both the 3and 2-electrode measurements in 1 M KOH solution. The composite NH4(NiCo)PO4·H2O/GF exhibited an improved specific capacity of 111 mAh g⁻¹ over the pristine NH4(NiCo)PO4·H2O material with a 100 mAh g⁻¹, which was obtained at 0.5 Ag⁻¹. Moreover, an assembled hybrid device NH4(NiCo)PO4·H2O/GF//AC revealed maximum specific energy of 47 Wh kg⁻¹ and specific power of 468 W/kg at 0.5 Ag⁻¹. The device was subjected to a long-term stability test of over 10,000 GCD cycles and could retain about 70% of its initial capacity and also proved a columbic efficiency of 99.8% at 10.0 A g⁻¹. Interestingly, the device could preserve a 1.14 V of its initial potential window of 1.4 V after being subjected to a 72 h self-discharge test, showing an efficiency of 81.4%. Based on the results discussed on this work, the NH4(NiCo)PO4·H2O/GF composite could be an excellent candidate as future energy storage material, specifically supercapacitors.

Chen, KJ, Duangthip D, Gao S, Huang F, Anthonappa R, Oliveira B, Turton B, Durward C, El Tantawi M, Attia D, Heima M, Muthu S, Maharani D, Folayan M, Phantumvanit P, Sitthisettapong T, Innes N, Crystal Y, Ramos-Gomez F, Chu C-H.  2021.  Oral Health Policies to Tackle the Burden of Early Childhood Caries: A Review of 14 Countries/Regions, 2021/06/01. 2:670154. Abstract
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