College of Science and Technology

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Start date: 2020Has files: Yes

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Now showing 1 - 10 of 351
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    Investigating the dynamics of financial risk impact on property development in Lagos state, Nigeria
    (4 IOP Conf. Series: Earth and Environmental Science, 2025) Oloke, Olayinka C.; Adenekan, P. J.; Nwaniocha-Emegha, C. K.; Nwanwko, C. F.
    . This study examines the dynamics of risks of financing real estate development in Nigeria with particular emphasis on property development projects in Lagos state, taking into cognizance the current wave of macroeconomic instability in the country. Property development companies and real estate surveying and valuation firms that are involved in property development and registered with the Real Estate Developers Association of Nigeria (REDAN) constituted the study focus. Convenience sampling technique was engaged to select 100 respondents for the administration of questionnaires and a response rate of 86% was achieved. Basic statistical tools of frequency, percentages, charts as well as principal component analysis were engaged for data analysis which was eventually presented in tables, text and charts. Findings revealed amongst others that residential property development constituted the largest portfolio of development projects among the firms while regulatory risks, financial risk and market risks constituted the top three challenging risk facing real estate development projects in recent times. The study suggests the use of foreign direct investment in the form of off-shore finance procurement and patronage. The study also recommends dedicated team of professionals to oversee and ensure necessary regulatory compliance and communication.
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    Methods of Intellectual Property Valuation in Nigeria: Preference of Estate Surveyors and Values in Southwest, Nigeria
    (Journal of Harion Engineering University Vol. 46, No, 7, 2025) Ibisola, A. S.; Ayedun, C. A.; Oloke, O. C
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    Comparative Performance of REITS and Commercial Bank Shares in Nigeria Stock Exchange
    (COVENANT JOURNAL OF RESEARCH IN BUILT ENVIRONMENT. VOL. XIII NO. I, 2025) UMEH, Lawrence O.; Oloke, Olayinka C.; Okonu, Ayoade A.
    This paper compares the performance of Real Estate Investment Trusts (REITs) and commercial bank shares from 2011 to 2020 for the purpose of providing investments with optimal performance for savvy investors. Share prices and dividends from annual reports were used to calculate income, capital, and total returns. Returns and risks were measured using Mean and Standard Deviation; while risk adjusted rate of return tool measured the general performance of N-REITs and bank shares. REITs generally underperformed, compared to commercial bank shares. Only Skye Shelter REITs excelled in income return. N-REITs were found to be less risky than commercial bank stocks, but underperformed when compared to commercial banks. Skye Shelter REITs showed highest total return; while UPDC and Union Homes outperformed Access Bank and UBA. Only Polaris, GT, and Zenith banks higher income returns from the REITs. Overall, bank shares are riskier than REITs. Bank stocks offer higher returns with greater risk, whereas REITs provide stable returns with lower volatility, which is suitable for conservative investors. In conclusion, the combination of stable returns on REITs and the volatile returns on bank stocks will reduce the overall portfolio risk. Hence, investors should consider risk management by combining investment with different risk-return characteristics.
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    Assessment of Secondary Healthcare Facilities’ Maintenance Practices in Lagos State, Nigeria
    (DESIGN, CONSTRUCTION, MAINTENANCE, 2025) Oloke, Olayinka C.; Keziah, Nwaonicha-Emegha C.; Adenekan, Peculiar J.
    This study investigates the maintenance practices of secondary healthcare facilities in the study area with a view to ascertaining the prevalent maintenance approach and improve the practices. Survey design was adopted and copies of questionnaire were administered to respondents from public and private secondary hospitals. Response rate of 77.7% was achieved. Statistics tools such as mean score, standard deviation, kurtosis as well as inferential tools of paired sample t-test and pearson moment correlation were engaged for the analysis. Results were presented in charts, tables, percentages and were discussed in the light of relevant extant studies. The study observed amongst others that reactive maintenance such as periodic, corrective and condition-based maintenance methods are prevalent in public secondary hospitals while private hospitals engage preventive maintenance alongside the reactive strategies. It was also observed that there is statistically significant difference in the perception of the state of maintenance of public and private hospitals in the study area. The study advocates more use of proactive maintenance approach at both the public and private secondary hospitals in the study area.
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    Recent Advancement Toward the Application of Proteomics, Metabolomics, Genomics and Bioinformatics for the Improvement of Nanofertilizer Research
    (2024-11-07) Oyewole, Oluwafemi Adebayo; Olusanya, Clement Shina; Yakubu, Japhet Gaius; Aworunse, Oluwadurotimi Samuel; Utazi, Ezugwu, Basil; Adetunji, Charles Oluwaseun; Eniola, K. I. T.; Yerima, Mohammed Bello
    The usage of chemical fertilizers is upsetting the ecology in addition to harming human health. Biofertilizers promote plant development by boosting the delivery of nutrients or compounds that promote plant growth. Growing in popularity in the agriculture sector of developing nations is a novel strategy called nanotechnology. Plants exposed to adverse environments respond to nanoparticle stimuli by activating a variety of defense mechanisms. Biofertilizer and nanotechnology were combined to create nanobiofertilizer, which increased agricultural output and efficiency. These fertilizers offer a number of benefits over conventional fertilization techniques and can be utilized to increase agricultural output while minimizing the harmful impacts of fertilizer on the environment. The maintenance of soil moisture and plant uptake of vital nutrients are made easier by the synergistic action of nanomaterial and microbial fertilizer. Additionally, bionanofertilizers are a lowcost solution to boost soil health, plant nutrient uptake, and growth and production. A new area of research into the production of inorganic and organic bionanoparticles as environmental fertilizers has been launched through the use of bacteria, algae, yeast, fungi, actinomycetes, and plants to biosynthesize nanomaterials. The microbes used as biological fertilizers include Azotobacter, Pseudomonas sp, Bacillus sp, and Enterobacter sp. In order for these nanobiofertilizers to be produced commercially and made available to farmers, it is necessary to research and develop more suitable ones. Nanobiofertilizer is still not widely available for purchase. And the application of proteomics, metabolomics and genomics and bioinformatics in nanobiofertilizer research can provide a comprehensive understanding of the molecular mechanism underlying plant microbe interaction, nutrient delivery, and crop growth promotion. This knowledge can be exploited to optimize the composition and functionality of nanobiofertilizers, resulting in nutrient use efficiency, improved crop productivity, and environmental sustainability.
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    Post-germination Application of Trichoderma asperellum for the Biocontrol of Macrophomina phaseolina in Cowpea
    (Tropical Journal of Natural Product Research Vol 9, Issue 12,, 2025) Oyesola, Olusola L.; Kinge, Tonjock R.; Kolade, Olufisayo A.; Obembe, Olawole O.
    Cowpea (Vigna unguiculata (L.) Walp.) serves as a food source for humans and forage for animals. However, its production is affected by disease-causing fungi, of which Macrophomina phaseolina is a significant pathogen. Trichoderma was employed as a biofungicide to manage the disease in the screenhouse. Three strains of Trichoderma asperellum were isolated from the soil. The fungal spore suspensions of the Trichoderma strains were prepared, formulated into seven different treatment combinations, and applied to the cowpea potted soil five days after the germination of the cowpea to investigate their biocontrol ability on M. phaseolina and assess their effects on cowpea growth. The experiment's results showed that cowpea plants treated with T. asperellum differed significantly in plant height, stem girth, and leaf number compared to those treated with M. phaseolina alone (p < 0.05). Trt3 (54.6815 cm), Trt1 (54.0125 cm), and Trt5 (52.9375 cm) gave a higher plant height than in control 1 (M. phaseolina-treated cowpea - 44.9667 cm). Also, Trt7 (0.5413) and Trt3 (0.5258) gave a higher stem girth than in control 1 (M. phaseolina-treated cowpea - 0.3333 cm), while Trt6 (20.292) gave a higher leaf number than in control 1 (M. phaseolina-treated cowpea - 8.833). Additionally, Trt3 and Trt7 exhibited disease incidences of 22% and 67%, respectively, compared to control 1, which had a 100% incidence. Meanwhile, Trt7 showed 8% disease severity, compared to control 1, which had 100%. Therefore, post-germination Trichoderma application proved to be an effective strategy for controlling M. phaseolina, and it also has the potential to enhance cowpea biomass for sustainable food security
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    Post-germination Application of Trichoderma asperellum for the Biocontrol of Macrophomina phaseolina in Cowpea
    (Tropical Journal of Natural Product Research, 2025) Oyesola, Olusola L.; Kinge, Tonjock R.; Kolade, Olufisayo A; Obembe, Olawole O
    Cowpea (Vigna unguiculata (L.) Walp.) serves as a food source for humans and forage for animals. However, its production is affected by disease-causing fungi, of which Macrophomina phaseolina is a significant pathogen. Trichoderma was employed as a biofungicide to manage the disease in the screenhouse. Three strains of Trichoderma asperellum were isolated from the soil. The fungal spore suspensions of the Trichoderma strains were prepared, formulated into seven different treatment combinations, and applied to the cowpea potted soil five days after the germination of the cowpea to investigate their biocontrol ability on M. phaseolina and assess their effects on cowpea growth. The experiment's results showed that cowpea plants treated with T. asperellum differed significantly in plant height, stem girth, and leaf number compared to those treated with M. phaseolina alone (p < 0.05). Trt3 (54.6815 cm), Trt1 (54.0125 cm), and Trt5 (52.9375 cm) gave a higher plant height than in control 1 (M. phaseolina-treated cowpea - 44.9667 cm). Also, Trt7 (0.5413) and Trt3 (0.5258) gave a higher stem girth than in control 1 (M. phaseolina-treated cowpea - 0.3333 cm), while Trt6 (20.292) gave a higher leaf number than in control 1 (M. phaseolina-treated cowpea - 8.833). Additionally, Trt3 and Trt7 exhibited disease incidences of 22% and 67%, respectively, compared to control 1, which had a 100% incidence. Meanwhile, Trt7 showed 8% disease severity, compared to control 1, which had 100%. Therefore, post-germination Trichoderma application proved to be an effective strategy for controlling M. phaseolina, and it also has the potential to enhance cowpea biomass for sustainable food security.
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    Stabilization and Environmental Sustainability of Swelling Clays Soils: A Review
    (COVENANT JOURNAL OF PHYSICAL AND LIFE SCIENCES, VOL. 13, NO. 2, 2025) Oziegbe, Ehitua J.; Oziegbe, Olubukola
    Water movement in swelling soils conforms with material continuity. This invariably justifies the differences in the gravitational potential energy during expansion and the anisotropic stresses that press the soil but allow for vertical movement. Under fluid conditions, vane efficiency exhibited by macropores is lowered by swelling of the clay, and a poorly drained soil results in surface saturation. The type of water applied to soil material tends to have an impact on the positioning of cracks in swelling clays, and thus, cracks can remain pathways for preferential flow much after they are covered at the soil surface. Over time, chemicals and chemical compounds have been utilized to further enhance the engineering properties of such soils. However, environmentally friendly biodegradable biological stabilizers are taking the place of conventional stabilizers, most especially lime and cement. Additionally, biochar amendment, which is ecofriendly, has also been found to lower the swelling index capability of expansive clay soil. Despite the dangers associated with swelling clay, it has found extensive use as adsorbents, carriers in drug delivery systems, and the building of a storage tank for the disposal of radioactive materials. In addition, swelling clays have found significant usage in the production of controlled-release fertilizers (CRFs) formulations. Hence this paper emphasizes the environmental impact of building large structures and road construction on swelling clay soils, highlights recent progress in the inhibition and stabilization of swelling soils to sustain the environment, and enumerates the economic importance associated with swelling clay soils.
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    Trichoderma: A Review of its Mechanisms of Action in Plant Sustainable Disease Control
    (IOP Conf. Series: Earth and Environmental Science1, 2025) Oyesola, O. I.; Kinge, R. T.; Obembe, O O
    Trichoderma has been widely studied for its potential as a bioagent for managing plant pathogens. Trichoderma's biological control mechanisms include competition, modification of environmental conditions, antibiosis, induction of plant defensive mechanisms, mycoparasitism, and plant growth promotion. Trichoderma produces diverse metabolites that have antifungal activity. These metabolites include peptaibols, gliotoxin, and trichokonins. Trichoderma also produces β-1,3-glucanases and chitinases that can break down fungal pathogens' cell walls. In addition to direct antagonism against fungal pathogens, Trichoderma can also trigger localised or systemic resistance in plants, which is achieved through the production of elicitors such as chitin oligosaccharides and β-glucans that activate plant defence responses. Trichoderma can also form mutualistic associations with plants. Trichoderma colonises plant roots in these partnerships, enhancing growth by boosting nutrient uptake and triggering systemic resistance. As a biomanagement agent, Trichoderma offers numerous benefits compared to traditional crop protection methods, like synthetic pesticides.
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    Impact of Industrialization on the Environment: Water Quality Index of Pharmaceutical Effluent Discharged in Ota, Ogun State, Nigeria
    (IOP Conf. Series: Earth and Environmental Science, 2025) Nwinyi, Obinna C.; Kayode-Afolayan, S. D.; Ahuekwe, E. F.; Oziegbe, O.; Omonhinmin, Conrad A.
    . There has been an upsurge in the recalcitrance and bioaccumulation of some deterimental pharmaceutical by-products and heavy metals in the aquatic ecosystem. This study determined the water quality index (WQI) of a pharmaceutical effluent discharged in Ota. The physicochemical parameters of the effluent were carried out using turbidimetric (NTU), nephelometric (mg/L), titrimetric (mg/L), conductivity (uS/cm) and spectrophotometric (nm) methods. The parameters assayed include pH, turbidity, conductivity, and temperature. Others include the biochemical oxygen demand (BOD), chemical oxygen demand (COD), biogenic/organic constituents and heavy metals. The physicochemical results obtained were compared with the World Health Organization and United States Environmental Protection Agency standards. These include 4.76±0.07 pH; 1.9±1.00 DO (mg/L) 12.0±1.10 chloride; 3.0±0.03 sulphates; 8.96±0.90 nitrates; 3.21±0.06 phosphates; 29 ±1.12 BOD and 339±2.10 COD. The distribution of heavy metals is in the following order: Zn > Cu > As> Ni> Pb > Cd > Hg. All the results obtained were within acceptable limits of the USEPA and WHO standards. The estimation of the overall quality of the wastewater gave a WQI of 32.54 which suggests a good water quality that is re-usable for irrigation and other purposes.