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Does External Debt Promote Human Longevity in Developing Countries?Evidence from West African Countries

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Fudan Journal of the Humanities and Social Sciences 2023年第2期16卷 213-237页

作者： Samson adeniyi Aladejare Department of Economics Federal University WukariWukariNigeria

This study assessed the impact of external debt on longevity in developing countries,particularly in West Africa,from 1981 to *** was proxied by life expectancy at birth,while the study evaluated effects from external debt from the perspective of sustainability,liquidity,and ***,outcomes from macroeconomic volatility were controlled through inflation and exchange rate ***,the robustness of inferences was ensured by using estimated outcomes from the cross-sectional augmented autoregressive distributed lag(CS-ARDL),dynamic common correlated effects(DCCE),and the Driscoll–Kraay(D–K)***,the study showed that unsustainable,illiquid,and insolvent external debt and macroeconomic volatility shorten longevity mainly in the long-term in West African ***,longevity will decline when weak external debt management promotes poverty in developing countries.

关键词： External debt Life expectancy Quality of life Development West Africa

A perspective on environmental sustainability in the cement industry

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Waste Disposal and Sustainable Energy 2020年第3期2卷 161-164页

作者： Joshua O.Ighalo Adewale George adeniyi Department of Chemical Engineering Faculty of Engineering and TechnologyUniversity of IlorinIlorin P.M.B.1515Nigeria

Cement production is a major contributor to anthropogenic CO_(2) emissions and solid waste *** paper discusses some of the key issues as regards the slow progress in achieving environmental sustainability in the cement ***-niques such as carbon capture and storage(CCS),material substitution,alternative fuels and energy efficient technologies have been proposed as means of mitigating the negative environmental impact of cement *** was observed that much progress has been made in the area of eco-friendly research *** innovations(considered as disruptive by the mega co-operations)have had issues at the entrepreneurial *** so-called disruptive technologies have strug-gled to meet some performance requirements and satisfy funding evaluators thus are still difficult to fully *** systematisation of the environmental sustainability problem was discussed as a possible way forward both in the environ-mental,economic and social *** into the future,a greater emphasis on systematised decision-based approach could help breach the gap between on-paper plans and practical implementations to achieve environmental sustainability.

关键词： Cement Environment Waste Global warming Pollution Sustainability

The Spectroscopic and Electronic Properties of Dimethylpyrazole and Its Derivatives Using the Experimental and Computational Methods

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光谱学与光谱分析 2014年第9期34卷 2305-2319页

作者： Adebayo A adeniyi Peter A Ajibade Department of Chemistry University of Fort HarePrivate Bag X1314 Alice 5700South Africa

In this paper the spectroscopic and the geometric properties of four ligands with pyrazole unit are studied at both experimental and computational *** computational results are perfectly in good agreement with the experimental results especially in terms of the IR,1 H-NMR and 13 C-NMR *** spectroscopic features as well as the computed properties help to establish the successful synthesis of ligands bdmpzm and *** theoretical and the experimental IR and Raman significantly help in distinguishing the four *** results show that the Raman spectral is better applicable in characterising the CH3deformation,the C-H,CNN and CCNNout of the ligands but vibrations like N-H in dmpz and O-H,CO in bdmpza are observed to be Raman inactive.A significant variations are observed among the two available*N atoms characterising the bidentate features of bdmpzm,bdmpza and bdcpzm which indicates a possible different affinities for metal *** the result suggest that bdmpza will be the best starting material for NLO application than other while bdcpzm is predicted to have potential of been a poor coordinating *** computed variations in the properties of*N atoms that are the characteristic features of their power of coordination can be of immense help since these type of ligands have a wide application in transition metal coordination.

关键词： Hyperpolarizabilities Raman spectra IR 1 H-NMR 13 C-NMR Isotropic shielding

In vitro inhibition activity of polyphenol-rich extracts from Syzygium aromaticum(L.)Merr.& Perry(Clove)buds against carbohydrate hydrolyzing enzymes linked to type 2 diabetes and Fe^(2+)-induced lipid peroxidation in rat pancreas

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Asian Pacific Journal of Tropical Biomedicine 2012年第10期2卷 774-781页

作者： Stephen adeniyi Adefegha Ganiyu Oboh Department of Biochemistry Federal University of TechnologyAkure

To investigate and compare the inhibitory properties of free and bound phenolic extracts of clove bud against carbohydrate hydrolyzing enzymes (alpha-amylase & alpha-glucosidase) and Fe2+-induced lipid peroxidation in rat pancreas in vitro. Methods: The free phenolics were extracted with 80% (v/v) acetone, while bound phenolics were extracted from the alkaline and acid hydrolyzed residue with ethyl acetate. Then, the interaction of the extracts with alpha-amylase and alpha-glucosidase was subsequently assessed. Thereafter, the total phenolic contents and antioxidant activities of the extracts were determined. Results: The result revealed that both extracts inhibited alpha-amylase and alpha-glucosidase in a dose-dependent manner. However, the alpha-glucosidase inhibitory activity of the extracts were significantly (P<0.05) higher than their alpha-amylase inhibitory activity. The free phenolics (31.67 mg/g) and flavonoid (17.28 mg/g) contents were significantly (P<0.05) higher than bound phenolic (23.52 mg/g) and flavonoid (13.70 mg/g) contents. Both extracts also exhibited high antioxidant activities as typified by their high reducing power, 1,1 diphenyl-2- picrylhydrazyl (DPPH) and 2, 2-azinobis-3-ethylbenzo-thiazoline-6-sulfonate (ABTS) radical scavenging abilities, as well as inhibition of Fe2+-induced lipid peroxidation in rat pancreas in vitro. Conclusions: This study provides a biochemical rationale by which clove elicits therapeutic effect on type 2 diabetes.

关键词： Alpha-amylase Alpha-glucosidase Fe^(2+)-induced lipid peroxidation Pancrea Phenol Antioxidant

Exposure of children to heavy metals from artisanal gold mining in Nigeria:evidences from bio-monitoring of hairs and nails

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Acta Geochimica 2020年第4期39卷 451-470页

作者： adeniyi JohnPaul Adewumi Temitope Ayodeji Laniyan Tangfu Xiao Yizhang Liu Zengping Ning Department of Geological Sciences Achievers UniversityOwo.Ondo StateNigeria Department of Environmental Health Sciences College of MedicineUniversity of IbadanIbadanOyo StateNigeria Key Laboratory for Water Quality and Conservation of the Pearl River Delta Ministry of EducationGuangzhou UniversityGuangzhou 510006China School of Environmental Science and Engineering.Guangzhou University Guangzhou 510006China State Key Laboratory of Environmental Geochemistry Institute of GeochemistryChinese Academy of SciencesGuiyang 550081China

In recent times,there had been reported cases of Pb poisoning in Anka gold mining area,Northwest ***,this study was carried out to determine the extent of bioaccumulation of heavy metals in the hairs and nails of children in the *** samples(twenty nails and twenty hairs)samples were collected from ten boys and ten girls of ages 5–9 residing in the *** ascertain the sources of heavy metals in children,15 soils samples,15 groundwater samples,5 samples of mine tailings,and 5 plants samples were *** and nails of the subjects were collected using internationally acceptable *** samples were kept in uncontaminated ziplock bags prior to laboratory preparation and *** samples were cleaned using nonionic detergent(triton X-100)and deionized *** hairs and nails were digested with 10 mL of 6:1 mixture of nitric acid and perchloric *** soils,mine tailings,and plants were air-dried at room temperature,sieved,and chemically digested using the aqua regia *** concentrations of metals in all the samples were determined using highperformance liquid chromatography–inductively coupled plasma–mass *** analysis was employed to unravel potential sources of metals in the *** showed that heavy metals in children of the area are above results from similar studies and pathological ranges for heavy metals in hairs and ***,heavy metals in environmental media are above the recommended *** analysis showed that the metals are mainly from mining and other anthropogenic *** of correlation between heavy metals in hairs and nails with those in geological samples revealed that heavy metal that bioaccumulates in the children of this area are mostly from contaminated environmental *** is recommended that complete remediation and effective health education be carried out in the area.

关键词： Anka Bioaccumulation Children Heavy-metals Hairs Nails

Genomic and transcriptomic analyses reveal selection of genes for puberty in Bama Xiang pigs

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Zoological Research 2018年第6期39卷 424-430页

作者： Yang Yang adeniyi C.Adeola Hai-Bing Xie Ya-Ping Zhang State Key Laboratory of Genetic Resources and Evolution Yunnan Laboratory of Molecular Biology of Domestic AnimalsKunming Institute of ZoologyChinese Academy of Sciences Kunming College of Life Science University of Chinese Academy of Sciences

The Bama Xiang pig （BMX） Chinese indigenous breed is a famous early-maturing with a two-end black coat To uncover the genetic basis of the BMX phenotype, we conducted comparative genomic analyses between BMX and East Asian wild boars and Laiwu pigs, respectively. Genes under positive selection were enriched in pathways associated with gonadal hormone and melanin synthesis, consistent with the phenotypic changes observed during development in BMX pigs. We also performed differentially expressed gene analysis based on RNA-seq data from pituitary tissues of BMX and Large White pigs. The CTTNBP2NL, FRS2, KANK4, and KATNAL1 genes were under selection and exhibited expressional changes in the pituitary tissue, which may affect BMX pig puberty. Our study demonstrated the positive selection of early maturity in the development of BMX pigs and advances our knowledge on the role of regulatory elements in puberty evolution in pigs.

关键词： Puberty Bama Xiang pig Pituitary Differentially expressed genes

Sequence stratigraphic analysis and hydrocarbon prospectivity of AMO Field,deep offshore Niger Delta,Nigeria

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Energy Geoscience 2022年第1期3卷 80-93页

作者： adeniyi Amodu Oluwaseye Peter Oyetade Suyi Lawrence Fadiya Oluwabamiwa Fowora Department of Geology Modibbo Adama UniversityYolaNigeria Department of Geology University of CalabarCalabarNigeria Department of Geology Obafemi Awolowo UniversityIle IfeNigeria Conoil Producing Limited LagosNigeria

An integrated interpretation of processed 3D seismic data,a suite of well logs,biostratigraphic data and core photographs of AMO Field,deep offshore Niger Delta,is carried out for the sequence stratigraphic analysis of strata penetrated by *** and key stratigraphic surfaces,that is,the maximum flooding surfaces(MFSs)and sequence boundaries(SBs),are identified based on bioevents and log *** data help the delineation of MFSs and SBs,as well as dating,determination of depositional environment and *** sequence stratigraphic study reveals seven MFSs(of 13.0 Ma,11.0 Ma,9.5 Ma,7.4 Ma,5.8 Ma,5.0 Ma and 2.7 Ma)and six SBs(of 12.1 Ma,10.3 Ma,8.5 Ma,6.3 Ma,5.5 Ma and 4.2 Ma).The key stratigraphic surfaces identified involve three depositional sequences characterized by lowstand,transgressive and highstand system tracts *** studied section is deposited in a deepwater environment ranging from Lower to Upper Bathyal and can be dated back to the Middle Miocene-Middle Pliocene in *** faults and two horizons(corresponding to reservoir units)are identified and mapped across the seismic data volume to establish a continuity of the reservoir to areas lacking well *** established sequence stratigraphic framework displays successions of sediments(system tracts)where the reservoir sand units of the lowstand and highstand system tracts are of hydrocarbon prospective units in the field.

关键词： Sequence stratigraphy Bioevents Depositional environment AMO Field Niger Delta

Source rock geochemistry of central and northwestern Niger Delta: Inference from aromatic hydrocarbons content

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Energy Geoscience 2023年第3期4卷 9-17页

作者： Akinsehinwa Akinlua Olugbemiga Raphael Dada Fuad Oluseyi Usman Solomon adeniyi Adekola Fossil Fuels and Environmental Geochemistry Department of ChemistryObafemi Awolowo UniversityIle-IfeNigeria Department of Geology Obafemi Awolowo UniversityIle-IfeNigeria

The influence of origin, depositional environment and thermal maturity of organic matter on the occurrence of aromatic hydrocarbons in source rocks from the central and northwestern Niger Delta was investigated. Eighty two source rock samples from four oil wells in the central and northwestern Niger Delta were analyzed for the aromatic hydrocarbon content using gas chromatography-mass spectrometry (GC-MS). The results of analysis of aromatic hydrocarbon fractions of the source rock extracts show the presence of many classes of aromatic hydrocarbons, which include naphthalenes, phenanthrenes, biphenyls, dibenzothiophenes and fluorenes. Trimethylnaphthalene (TMN) is the most abundant among the naphthalenes while dimethylphenanthrene (DMP) is the most abundant among the phenanthrenes. Among the biphenyls, 3-methylbiphenyl (3 MB) is the most abundant while 4-methyldibenzothiophene (4MDBT) is the most abundant among the dibenzothiphenes. Only two fluorenes were detected, and fluorene is more in abundance than 1-methylfluorene (1 MF). Depositional environment indicators of aromatic hydrocarbon organic matter reveal that the organic materials in the source rocks in these wells were deposited in marine-to-swamp depositional environments under reducing to suboxic conditions. Thermal maturity indicators calculated from the abundance of the aromatic hydrocarbons indicate that the source rock samples are thermally mature. Most of the source rocks are at the peak of oil window while a few at the early oil window. Source rocks from wells GB, OP and OT in the central Niger Delta are thermally more mature than those from well AW in the northwestern Niger Delta.

关键词： Source rock Aromatic hydrocarbon Thermal maturity Depositi onal envir onment Niger Delta

Energy-Exergy Analysis and Carbon (IV) Oxide Emission of an Aluminium Extrusion Plant in Nigeria

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Engineering（科研） 2017年第12期9卷 1048-1059页

作者： Mufutau Adekojo Waheed Peter Olaitan Aiyedun Wasiu Oyediran Adedeji Adekunle Adedapo Obisanya Semiu taiwo Amosun adeniyi Oluwole Adesina Department of Mechanical Engineering Federal University of Technology Abeokuta Nigeria Department of Mechanical Engineering Yaba College of Technology Lagos Nigeria Department of Chemical Engineering Yaba College of Technology Lagos Nigeria

Energy security, cost of production and environmental constraints have necessitated the need for proper energy utilisation in the manufacturing industries. This work analysed energy and production data from an aluminium extrusion plant in Lagos, Nigeria for energy efficiency, exergy efficiency (or process?efficiency), energy cost per unit of production, CO2 emission and pollution?rate?index. The input-output energy analysis method was used to estimate the?embodied energy intensity. The pollution rate, energetic and exergetic efficiencies were estimated from the exergy analysis. The CO2 emission was estimated?from IPCC guideline on greenhouse inventories and the energy cost of unit?produce was estimated from energy cost accounting method. The five-year average thermal and electrical utilisation ratio was 45/55, which deviated from the 70:30 of the global best practices. The embodied energy intensity for the five years’ ranges between 2.31 - 162.3 GJ/t which is in excess of the recommended?range of (2.9 - 3.2 GJ/t). The mean energy efficiency for the five year was 79.4% and the mean exergetic efficiency was 57.8% indicating that production was well?managed (>50%) with energy wastages very high in boiler energy conversion. The total energy used was 16 MJ and CO2 emitted is 1.01 × 1011 g during the study period. The average pollution rate index for the plant was 0.8695 indicating that the plant is negatively impacting the environment due to technological limitation of the energy conversion process employed in the manufacturing plant. The study reveals a distortion of the recommended best practice in energy balance ratio which accounted for the high average cost of production (N 4418.3/t);process efficiency was generally low thereby negatively affecting industrial output for the company.

关键词： Exergy Energy Carbon (IV) Oxide Emission Pollution