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A Result on Uniformly Dissipative Solutions for a Certain Fifth Order Non-Linear Differential Equation

Journal of Mathematical Research and Exposition 2006年第3期26卷 465-470页

作者： adesina olufemi adeyinka Dept. of Math. Obafemi Awolowo University Ile-Ife Nigeria

Criteria for the existence of uniformly dissipative solutions for a certain fifth order non-linear differential equation are given by means of the frequency domain method.

关键词：有界解消耗解频域不等式非线性微分方程

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Level of polycyclic aromatic hydrocarbon emission in the ambient air and residual ash from a typical municipal solid waste open burning site in Nigeria

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Waste Disposal and Sustainable Energy 2020年第2期2卷 105-111页

作者： Olusola Adedayo adesina adeyinka Olumide adesina Jamiu Adetayo Adeniran Department of Chemical and Petroleum Engineering Afe Babalola UniversityAdo-EkitiNigeria Department of Nanoscience Joint School of Nanoscience and Nanoengineering University of North CarolinaGreensboroUSA Climate and Ocean-Atmosphere Studies Laboratory Department of Atmospheric and Oceanic SciencesPeking UniversityBeijingChina Environmental Engineering Research Laboratory Department of Chemical EngineeringUniversity of IlorinIlorinNigeria

Open burning of municipal solid waste(MSW)is a common practice in *** of compounds of polycyclic aromatic hydrocarbon(PAHs)in ambient air and ash residues from burning of these wastes pose a great danger to the *** study investigated the contribution of open burning of MSW to the levels of PAHs in ambient air and ash residues from the burning *** samples were obtained from six sampling locations at a MSW burning *** foam passive samplers were used in collecting ambient air *** of PAHs was carried out using GC-MS operated in selected ion monitoring *** trend of ambient concentration of PAHs was;ΣPAHs AS-A(4.023)>AS-B(3.798)>AS-D(3.468)>AS-C(3.288),while average concentration of PAHs in the ash was 6.12 mg/*** of PAHs in ash samples ranged from 5.69-6.34 mg/*** component analysis(PCA)showed that most of the PAHs in the ambient were from MSW *** results obtained suggest that concerted effort of the government and the relevant stakeholders is required to safeguard the environment and humans from PAH pollution from open burning of MSW.

关键词： Pahs Open burning Toxicity equivalent PUF Ash

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Paleo-productivity and petroleum source evaluation of the Nkporo and Awgu shales, Lower Benue Trough, Nigeria: Insight from inorganic geochemistry

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能源地球科学(英文) 2023年第3期4卷 139-148页

作者： Henry Yemagu Madukwe Adebanji Kayode Adegoke Mutiu adesina Adeleye adeyinka Oluyemi Aturamu Department of Geology Faculty of ScienceEkiti State UniversityP.M.B.5363Ado-EkitiNigeria Department of Geology University of Malaya50603Kuala LumpurMalaysia Department of Geology Faculty of ScienceUniversity of IbadanIbadanNigeria

The petroleum paleo-productivity and generative potential of the Nkporo and Awgu shales in the Lower Benue Trough (LBT) were studied. Major oxides were determined using Spectro Ciros Inductively-coupled plasma optical emission spectrometer (ICP-OES) while trace and rare earth elements were determined using an ELAN 9000 Inductively-coupled plasma mass spectrometer (ICP-MS). The shales have Co/Ni ratios greater than 0.1 suggesting oil source rocks with more marine source input due to brief marine incursion in the transition zone after deposition. The very low Ni values and moderate V values, and a lack of correlation between the TOC and sulphur content, suggests that the organic matter is of terrestrial Type Ⅲ;and the very low paleo-productivity (Ba/Al and P/Ti ratios) suggests that the organic matter is of terrestrial origin. The low V/Ni values of the Nkporo and Awgu shales (Av. ≈ 4) and the high metal concentrations indicate a matured status. From the K/Rb ratios of the Nkporo (191–259) and Awgu shales (198–261), it can be deduced that the organic matter within the shales experienced a considerable loss of K and the shales are mature to generate gaseous hydrocarbons.

关键词： Maturity Organic matter Paleo-productivity Petroleum potentials Shale

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