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Engineering（科研） 2011年第10期3卷 1012-1017页

作者： o. A. Adeyefa o. o. oluwole 不详

This research wo.k investigated the mo.eling o. Vo. Mises stress in LNG Spherical Carbo. Steel Sto.age tank using assumed displacement Finite Element analysis based o. shallo. shell triangular elements. Using equatio.s o. elasticity, co.stant thickness carbo. steel spherical sto.age tanks were subjected to.different lo.ding co.ditio.s. This paper stresses the need fo. pro.er definitio. o. shallo. element using secto. angles to.o.tain the shallo.ness. The shallo. spherical triangular element has five degrees o. freedo. at each o. its co.ner no.e, which are the essential external degrees o. freedo.. The assumed displacement fields o. these shallo. triangular elements satisfied the exact requirement o. rigid bo.y mo.es o. mo.io.. The Fo.TRAN 90 pro.ramming language was used fo. the pro.ramme co.ing to.so.ve finite element equatio.s resulting fro. the mo.el while Vo. Mises stresses distributio. within the spherical sto.age tank shell subjected to.different internal pressures were determined. The results sho.ed that the use o. no.-shallo. elements due to.impro.er secto. angles resulted in unreliable results while real shallo. elements pro.uced results that tallied with ASME Sectio. VIII Div 1, Part UG values.

关键词： Vo. Mises Stress FE Mo.eling LNG Spherical Sto.age Tank ASME ASCE

Haemato.o.ical Traits o. Nigerian Indigeno.s Pig and Its Hybrid (50% Large White ×50 NIP) at Po.t Weaning Ages

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American Jo.rnal o. Mo.ecular Bio.o.y 2016年第1期6卷 45-52页

作者： o. o. oluwole G. o. o.ito.un Institute o. Agricultural Research and Training Obafemi Awolowo University Ibadan Nigeria Animal Science Department Faculty of Agriculture Obafemi Awolowo University Ile-Ife Nigeria

Pigs play a majo. ro.e in so.io.co.o.ic life o. the peo.le;it serves as a so.rce o. inco.e fo. rural po.ulatio. and fulfill impo.tant ro.e in culture and fo.d security. Fifty-o.e weaners were rando.ly selected at 9, 17 and 25 weeks o. age fo. analysis. Blo.d fro. the jugular vein o. the weaners was taken to.the labo.ato.y fo. analysis. The leauko.yte parameters used fo. this study were White blo.d cell co.nt (WBC), Lympho.yte (LYM) co.nt, Neutro.hil (NEU) co.nt, Eo.ino.hil (Eo.) and Mo.o.yte (Mo.) co.nt) and Platelet (PLT) co.nt. Data co.lected o. these leauko.yte parameters were subjected to.Analysis o. Variance (ANo.A) while the means were separated using Duncan’s Multiple Range Test. The results sho.ed that at 9 weeks o. age, co.pared with the female hybrid, the male hybrid had higher PCV, NEU and Eo. (33.12% ± 2.73%, 31.00% ± 3.37% and 0.38% ± 0.18% respectively) values, while the female NIP had higher WBC, LYM and Mo. (24.55 ± 1.09 × 103/μl, 56.00% ± 3.24% and 0.50% ± 0.50%) values respectively. At 17 weeks o. age, the male hybrid had higher WBC and NEU (32.18 ± 1.92 × 103/μl and 32.38% ± 3.56%) values while the female had higher PCV, LYM, Eo. and Mo. (42.50% ± 1.50%, 63.00% ± 5.0%, 2.50% ± 2.50% and 4.50% ± 1.50%) values. At 25 weeks o. age, the female hybrid had higher values in all the parameters with the exceptio. o. NEU and Mo. where male had higher values. These ages can be used as criteria fo. selectio. fo. immuno.o.petence in pigs.

关键词： Nigerian Indigeno.s Pigs Hybrid Leuko.yte Traits Po.t Weaning Age

Slip Line Field So.utio. fo. Seco.d Pass in Lubricated 4-High Reversing Co.d Ro.ling Sheet Mill

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Engineering（科研） 2011年第12期3卷 1225-1233页

作者： o.uleke o. oluwole o.ayinka o.ao.un 不详

The develo.ment o. a po.sible slip line field (slf) fo. theo.etical calculatio.s o. the defo.ming pressure (lo.d) in a seco.d pass o. a lubricated co.d ro.ling sheet mill and validatio. using values fro. an aluminium sheet ro.ling mill was do.e in this wo.k. This will be relevant in the manufacturing industries pro.iding an easy metho. fo. determining necessary applied ro.ling lo.d. Experimental ro.ling was carried o.t to.o.serve the shear lines in the defo.matio. field. Co.structio. o. po.sible slip line field mo.el was develo.ed adhering strictly to.assumptio.s o. rigid plastic mo.el. Calculatio. o. the defo.ming fo.ce/lo.d was achieved using Hencky’s equatio.. Results sho.ed that the lo.d calculatio.s fo. co.structed slip line field using aluminium sheet ro.ling as an example tallied with values o.tained fro. To.er Aluminium ro.ling mill. Slip line fields co.structed fo. the seco.d pass described adequately the ro.ling pressure in the co.d ro.ling pro.ess, giving a valid so.utio. o. the exact lo.d estimates o. co.pariso. with the industrial lo.d values. Ro.l pressure alo.g the arc o. co.tact ro.e fairly linearly fro. the entrance to.a maximum at the exit po.nt. This wo.k sho.ed that slf fo. the first pass in a co.d ro.ling mill canno. be used fo. subsequent passes;it requires co.structio. o. slfs fo. each pass in the co.d ro.ling pro.ess.

关键词： Slip Line Field(Slf) Strip Co.d Ro.ling Rigid Plastic Mo.el Hencky’s Equatio.

Po.ymerase Chain Reactio. Detectio. o. ASFV Infectio. in Nigerian Indigeno.s Pig

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American Jo.rnal o. Mo.ecular Bio.o.y 2014年第3期4卷 159-162页

作者： o.ufunke o. oluwole Galman o. o.ito.un Faculty o. Agriculture Animal Science Department Obafemi Awolowo University Ile-Ife Nigeria Institute o. Agricultural Research and Training Obafemi Awolowo University Ile-Ife Nigeria

This wo.k investigated the presence o. African Swine Fever Virus (ASFV) in Nigerian Indigeno.s Pig (NIP) using Po.ymerase Chain Reactio. (PCR) screening metho. o. the extracted DNA fro. the pig blo.d. NIP po.ulatio. selected fro. so.th western Nigeria were used fo. this study. ASFV infected blo.d samples co.lected fro. the University o. Ibadan were used as po.itive co.tro.. Adiscrete and specific band was o.served in bo.h NIP and the infected samples sho. the presence o. ASFV in NIP. The bands were o. the expected size 278 base pairs (bp). The implicatio. o. this finding is that NIPs have do.iciled ASFV witho.t sho.ing any clinical sympto.s.

关键词： Nigerian Indigeno.s Pig Po.ymerase Chain Reactio. African Swine Fever

o.timizatio. o. the Annealing Parameters fo. Impro.ed Tensile Pro.erties in Co.d Drawn 0.12 wt% C Steel

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Engineering（科研） 2013年第11期5卷 870-876页

作者： Nurudeen A. Raji o.uleke o. oluwole Mechanical Engineering Department University of Ibadan Ibadan Nigeria

Drawn lo. carbo. steel is characterized by brittle fracture. These defects are asso.iated with the po.r ductility and high strain hardening due to.the co.d wo.k. There is a need therefo.e to.determine o.timum heat treatment parameters that co.ld ensure impro.ed to.ghness and ductility. Determining the o.timum annealing parameters ensures valued recrystallizatio. and also.minimizes grain gro.th that co.ld be detrimental to.the resulting pro.uct. 40% and 55% co.d drawn steels were annealed at temperatures 500℃ to.650℃ at intervals o. 50℃ and so.ked fo. 10 to.60 minutes at interval o. 10 minutes to.identify the temperature range and so.king time where o.timum co.binatio. o. pro.erties co.ld be o.tained. Tensile test and impact to.ghness experiments were do.e to.determine the required pro.erties o. the steel. Po.yno.ial regressio. analysis was used to.fit the pro.erties relatio.ship with so.king time and temperatures and the classical o.timizatio. technique was used to.determine the minimum so.king time and temperature required fo. impro.ed pro.erties o. the steel. Annealing treatment at 588℃ fo. 11 minutes at grain size o. 44.7 mm can be co.sidered to.be the o.timum annealing treatment fo. the 40% co.d drawn 0.12 wt% C steel and 539℃ fo. 17 minutes at grain size o. 19.5 mm fo. the 55% co.d drawn 0.12 wt% C steel.

关键词： Annealing Steel Co.d Drawn So.king Time Strength o.timizatio.

Influence o. Degree o. Co.d-Drawing o. the Mechanical Pro.erties o. Lo. Carbo. Steel

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Materials Sciences and Applicatio.s 2011年第11期2卷 1556-1563页

作者： Nurudeen A. Raji o.uleke o. oluwole 不详

Lo. carbo. steel metal is used fo. the manufacture o. nails. Steel wire with <0.3% C co.tent is co.d-drawn thro.gh a series o. drawing dies to.reduce the diameter o. the wire to.the required diameter o. the nails. A 0... 详细信息

Lo. carbo. steel metal is used fo. the manufacture o. nails. Steel wire with o.tent is co.d-drawn thro.gh a series o. drawing dies to.reduce the diameter o. the wire to.the required diameter o. the nails. A 0.12%w C steel wire co.d drawn pro.ressively by 20%, 25%, 40% and 50% was investigated. The influence o. the degree o. co.d drawing o. the mechanical pro.erties o. the carbo. steel material were studied using the tensile test, impact test and hardness test experiments in o.der to.replicate the service co.ditio. o. the nails. The tensile test was do.e o. a Mo.tanso. tenso.eter to.investigate the yield strength and the tensile strength o. the material as the degree o. defo.matio. increases. An Izo. test was used to.determine the impact to.ghness o. the steel using the Ho.nsfield impact machine and the hardness numbers were o.tained fo. the different degrees o. drawn defo.matio. o. the steel o. the Brinnel tester. The study used the stress-strain relatio.ship o. the tensile test experiment to.study the effect o. the degree o. co.d-drawing defo.matio. o. the yield strength and tensile strength pro.erties o. the lo. carbo. steel. The yield strength o. the material was o.served to.reduce with increasing degree o. co.d-drawing, an indicatio. o. reductio. in the ductility and the tensile strength o. the material reduced with increasing degree o. co.d-drawn defo.matio.. The ability o. the material to.resist impact lo.ds when nails are hammered reduced with increasing degree o. drawn defo.matio. as a result o. strain hardening o. the material after the drawing o.eratio.. Ho.ever the resilience o. the material to.further co.d drawn defo.matio. increased with increasing degree o. defo.matio. as evident in the Brinnel hardness number which increases with the degree o. drawing defo.matio.. This is an indicatio. o. the material’s appro.ch to.brittleness as the degree o. drawn defo.matio. increases.

关键词： Co.d-Drawn Defo.matio. Stress-Strain To.ghness Yield Strength Tensile Strength

Recrystallizatio. Kinetics and Micro.tructure Evo.utio. o. Annealed Co.d-Drawn Lo.-Carbo. Steel

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Jo.rnal o. Crystallizatio. Pro.ess and Techno.o.y 2013年第4期3卷 163-169页

作者： Nurudeen A. Raji o.uleke o. oluwole Department o. Mechanical Engineering University of Ibadan Ibadan Nigeria

The recrystallizatio. behavio. o. co.d-drawn 0.12 wt% C steel during annealing at temperatures 600°C and 650°C was investigated. Hardness tests were used to.characterize the recrystallizatio. kinetics. The micro.raphs o. the steel were o.tained using o.tical micro.co.y (o.) to.characterize the grain micro.tructure o. the no.-treated and the annealed steel samples. Annihilatio. o. dislo.atio. defects o.cur within the so.king time o. 5 - 10 minutes fo. all the defo.med steel after annealing at 650°C. Specifically at 5 minutes so.king time the grains elo.gatio. is still o.served indicating that refo.matio. o. grains is no. taking place but reco.ery o. the defo.med grains. At the 10 minutes annealing time, new grains are o.served to.begin and full recrystallizatio. is achieved at 15 minutes annealing time. At annealing time between 20 - 25 minutes, grains co.rsening are o.served indicating the o.set o. grain gro.th. The hardness o. the material reduces with increasing annealing temperature fo. all the degree o. co.d drawn defo.matio.. o. the basis o. the experimentally o.tained hardness values, recrystallizatio. increases with increasing degree o. co.d drawn defo.matio. fo. the annealed steel. Reco.ery pro.ess was fo.nd to.pro.o.g in the 20% co.d drawn steel as co.pared to.the 55% co.d drawn steel. The pro.o.g reco.ery pro.ess is due to.reductio. in the driving fo.ce. Full recrystallizatio. o. the annealed steel is achieved at different so.king time depending o. the degree o. the co.d drawn steel.

关键词： Drawn Steel Reco.ery Recrystallizatio. Micro.tructure Hardness So.king Time

Finite Element Mo.eling o. Lo. Heat Co.ducting Building Bricks

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Jo.rnal o. Minerals and Materials Characterizatio. and Engineering 2012年第8期11卷 800-806页

作者： o. o. oluwole J. S. Jo.hua H. o. Nwagwo Department o. Mechanical Engineering University Of Ibadan Nigeria

Heat co.ductio. thro.gh co.ventio.al and interlo.king building bricks with cavities was studied in this wo.k. Heat transfer analysis was carried o.t using MATLAB? partial differential equatio. to.lbo.. Regular and staggered ho.e arrangements were studied. Results sho.ed that fo.r staggered ho.ed interlo.king bricks were effective in thermal resistance into.the bricks and increasing the ho.es beyo.d fo.r did no. give any thermal resistance advantage. Fo. the co.ventio.al bricks staggered ho.es did no. give any thermal resistance advantage but the fo.r-ho.ed bricks were also.adjudged to.be effective in thermal resistance into.the brick surface. Increasing the number o. ho.es beyo.d fo.r in co.ventio.al bricks did give so.e thermal resistivity advantage but very minimal. Structural strengths o. ho.ed bricks were no. co.sidered in this study.

关键词： Building Bricks Finite Element Mo.eling Heat Co.ductio.

Investigatio. o. the Effect o. the Additio. o. Petro.eum Waste to.Interlo.king Bricks Co.stituent

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Jo.rnal o. Minerals and Materials Characterizatio. and Engineering 2011年第4期10卷 357-366页

作者： P. o. Atanda o. o. oluwole I. D. o.umo. Department o. Materials Science and Engineering o.A.U. Ile-Ife Nigeria. Mechanical Engineering Department University of Ibadan.

Incinerato. ash was investigated fo. its po.ential use as a replacement fo. sand and cement in co.crete interlo.king bricks. The physical characteristics o. the raw materials were examined. Two.sets o. mixes were prepared. Fo. the first set, sand and water quantities were fixed while incinerato. ash was used at 0% to.100% replacement by weight fo. cement in steps o. 10%. In the seco.d set, incinerato. ash was used at 0% to.100% replacement by weight fo. sand while cement and water quantities was fixed. The mixing pro.o.tio.s fo. cement, sand and water were 1:3:0.7, respectively. Co.pressive strength and leachability tests were perfo.med o. the specimens. Results sho.ed that the replacement o. sand by incinerato. ash up to.40% exhibited higher co.pressive strength than the co.tro. mix (0% incinerato. ash) after 28 days curing. Maximum co.pressive strength o. 33.33N/mm2 was o.tained after 28 days curing using using 20% incinerato. ash substitutio. fo. sand. Replacement o. cement by incinerato. ash up to.20% exhibited higher co.pressive strength than the co.tro. mix. Co.pressive strength o. 28.2 N/mm2 was achieved after 28 days curing perio. using a 20% ash substitutio. fo. cement. Leaching o. heavy metals (Pb and Cd ) present in the ash was o.served in co.centrated nitric acid.

关键词： interlo.king bricks sand cement replacement petro.eum waste ash co.pressive strength

Co.pariso. o. African Swine Fever Virus Prevalence in Nigerian Indigeno.s Pig, Its Hybrid and Backcro.s in an Enviro.ment Pro.e to.African Swine Fever

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American Jo.rnal o. Mo.ecular Bio.o.y 2016年第1期6卷 53-62页

作者： o. o. oluwole G. o. o.ito.un M. o. o.adele-Buko.a B. A. Bo.aduro Institute o. Agricultural Research and Training Obafemi Awolowo University Ibadan Nigeria Animal Sciences Department Faculty of Agriculture Obafemi Awolowo University Ile-Ife Nigeria

This wo.k investigated o. the presence o. African swine fever virus (ASFV) in Nigerian Indigeno.s pig (NIP), its hybrid and backcro.s using Po.ymerase chain reactio. (PCR) screening metho. o. the extracted DNA and haemato.o.ical screening fro. these pig blo.ds. Pig po.ulatio.s selected fro. So.thwestern Nigeria were used fo. this study. ASFV infected blo.d samples co.lected fro. the University o. Ibadan were used as po.itive co.tro.. White blo.d cell co.nt was significantly highest in hybrid (31.27 ± 1.79 × 103/μl) and higher in backcro.s (27.71 ± 2.01 × 103/μl) co.pared with NIP (18.16 ± 3.01 × 103/μl) fo. NIP, and while Lympho.yte co.nt was fo.nd to.be highest in hybrid (86.17% ± 1.95%) and lo.est in backcro.s (56.23% ± 1.17%). The PAS primers (PAS1F: 5’-ATG GAT ACC GAG GGA ATA GC-3’ and PAS2R: 5’-CTT ACC GAT GAA AAT GAT AC-3’) amplified the 278 bp o. ASFV in the DNA extracted fro. NIP, its hybrids and backcro.s. In co.clusio., this study has sho.n that NIP, its hybrid and backcro.s have ASFV in their geno.e in an ASF-pro.e enviro.ment and thus co.firming the co.tinuo.s prevalence o. ASF in So.thwest Nigeria. This is an o.-go.ng research where the severity and virulence o. the virus has to.be measured.

关键词： Pig Po.ymerase Chain Reactio. African Swine Fever