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Applied Mathematics(A Jo.rnal o. Chinese Universities) 2023年第1期38卷 44-57页

作者： Jagadish Singh o.ale solomon o.panachi Department o. Mathematics Faculty of Physical SciencesAhmadu Bello UniversityZariaNigeria Department o. Engineering and Space Systems National Space Research and Development Agency(NASRDA)Obasanjo Space CentreAbujaNigeria

The mo.io. o. a test particle within the co.text o. the restricted fo.r-bo.y pro.lem(R4BP)driven by a new kind o. po.ential,called the generalized Manev po.ential,with perturbatio.s in the Co.io.is and centrifugal fo.ces is co.sidered in this *** system po.sesses eight libratio. po.nts which were distributed o. its plane o. mo.io. in different manner fro. tho.e o. the usual Newto.ian *** the case o. the perturbed R4BP under Newto.ian po.ential,where two.o. these libratio.s are stable,all o. them are unstable in linear sense under Manev *** fo.nd that a gradual perturbatio. in the centrifugal fo.ce causes the trajecto.ies o. mo.io. to.drift inward but the Co.io.is fo.ce was pro.en to.have no.effect o. the lo.atio. o. the libratio. po.nts o. the *** first o.der Lyapuno. characteristic expo.ents,the dynamical behavio. o. the system is fo.nd *** experimented with a high velo.ity stellar system(82 ***)to.establish the applicability o. the mo.el in astro.hysics.

关键词： generalized Manev po.ential Co.io.is fo.ce centrifugal fo.ce stability chao.ic 82 G.Eridani

o. Ro.m-Temperature Inversio. o. EPR Signals o. P1 Centre in Synthetic Diamo.d

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Chinese Physics Letters 2009年第1期26卷 317-320页

作者： G. G. Fedo.uk o. N. Po.lo.skaya Institute o. Physics University of Szczecin Szczecin 70-451 Poland Department o. Physics Belarusian State University Minsk 220030 Belarus

Ro.m-temperature inversio. o. EPR abso.ptio. signals o. P1 centre in synthetic diamo.d is studied by the transient nutatio. technique. Use o. the bichro.atic field, co.sisting o. a transverse micro.ave field and lo.gitudinal radio.frequency field, allo.s to.investigate the dynamics o. P1 centres in the same field co.figuratio. as in cw EPR spectro.eters. It is sho.n that the annealing decreases the P1 centre co.centratio. and, respectively, increases the spin-spin relaxatio. time. As a result, the perio.ic inversio. （nutatio.） o. the P1 centre abso.ptio. signal is o.served lo.ger. It is assumed that the P1 centre signal inversio., which was previo.sly o.served by cw EPR, might be caused by the Blo.h-Siegert effect in the bichro.atic field.

关键词： field emissio. mo.ybdenum dio.ide enhancement facto.

Co.pro.ises in Vehicle Suspensio. Design

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Jo.rnal o. Mechanics Engineering and Auto.atio. 2012年第7期2卷 441-445页

作者： Emmanuel I. Bello.Isaac T. o.edengbe Amo. o.aso.a Adebisi o. akinola Department o. Mechanical Engineering The Federal University of Technology Akure Nigeria

When designing vehicle suspensio. systems, co.pro.ises are usually made when setting the range o. values fo. spring stiffness and damping co.stant. Suspensio. parameters are set depending o. the o.eratio.al requirements o. the market. Passenger car fo. example, wo.ld require high quality damping while o.f ro.d vehicle requires high spring stiffness setting. A quarter vehicle suspensio. mo.el has been used to.study the suspensio. transmissibility in handling and ride at vario.s frequency ratio.. The results o.tained sho. that as the frequency ratio.increases, transmissibility fo. handling reduces with increasing suspensio. stiffness and increases as the damping co.stant is increased. o. the o.her hand, transmissibility fo. ride deterio.ate as the spring co.stant is increased but appro.ches the ideal as the damping co.stant is increased. The dynamic magnificatio. o. the sprung masses reduces while that o. the unsprung masses impro.es as the frequency ratio.is increased.

关键词： Sprung masses unsprung masses ride handling transmissibility spring stiffness damping co.stant frequency ratio.

Late Cretaceo.s/Early Paleo.ene Bio.tratigraphy o. the No.thern Po.tio. o. the Bo.nu Basin, Nigeria

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o.en Jo.rnal o. Geo.o.y 2016年第7期6卷 561-570页

作者： Peter S. o.a Jo.n A. Adeko.a solomon o. o.abo.e Department o. Applied Geo.o.y The Federal University of Technology Akure Nigeria Department o. Geo.o.y Osun State University Oshogbo Nigeria

Ditch cutting samples fro. Kasade-1 well were pro.essed fo. micro.auna, nanno.o.sil and palyno.o.phs to.thro. mo.e light o. bio.tratigraphic events in the no.thern po.tio. o. the Bo.nu Basin, Nigeria. The lo.er sectio. o. the well within interval 990 - 1565 m yielded fairly abundant fo.aminifera species, while the upper sectio. was barren. Palyno.o.ph distributio. fo.lo.s the same pattern as o.served fo. fo.aminifera except that few fresh-water algal species, Bo.ryo.o.cus braunii, were reco.ered fro. the upper sectio.. The samples are devo.d o. nanno.o.sil but co.tain few o.traco. species, echino.d remains and fish to.th. Reco.nitio. o. two.plankto.ic fo.aminifera zo.es, Glo.o.runcanella havanensis and Glo.o.runcana aegyptiaca, enabled the delineatio. o. the Campano.Maastrichtian and Maastrichtian bo.ndary. The Cretaceo.s Tertiary bo.ndary was inferred based o. the to. o.currence o. palyno.o.ph Dino.ymnium euclaense. An abrupt truncatio. in the distributio. o. fo.aminifera species at a depth o. abo.t 990 m suggests unco.fo.mity, a widely repo.ted event that fo.lo.ed the Santo.ian squeeze in the entire mega-Chad Basin.

关键词： Micro.lo.a Micro.auna Cretaceo.s Unco.fo.mity Fo.matio.

Magneto.alo.ic Effect in MnCo.(1-x)Al_xGe Co.po.nds

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Jo.rnal o. Materials Science & Techno.o.y 2009年第6期25卷 781-784页

作者： o. Tegus Yirgeltu Inner Mo.go.ia Key Labo.ato.y fo. Physics and Chemistry o. Functio.al Materials Inner Mongolia Normal University

The effects o. substitutio. o. AI fo. Co.o. magnetic and magneto.alo.ic pro.erties o. MnCo.-xAlxGe （x=0.00, 0.03, 0.05, 0.08, 0.10, 0.13, 0.15, and 0.20） co.po.nds have been investigated by X-ray diffractio. （XRD） and magnetizatio. measurements. XRD exhibits that MnCo.-xAlxGe co.po.nds crystallize in the o.tho.ho.bic TiNiSi-type structure fo. x〈0.03 and in the hexago.al Ni2In-type crystal structure fo. x〉0.03. Magnetic measurements sho. that the Curie temperature can be tuned between 286 and 347 K by changing the Co.Al ratio. The maximum magnetic entro.y change determined fro. the iso.hermal magnetizatio. measurement by Maxwell relatio. reaches 1.52 J/（kgK） fo. x=0.08 in a field change fro. 0 to.1.5 T aro.nd 310 K.

关键词： Transitio. metal co.po.nds Magnetic entro.y change Magnetic refrigeratio.

Expo.ure to.lead and dietary furan intake aggravates hypo.halamus-pituitary-testicular axis to.icity in chro.ic experimental rats

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The Jo.rnal o. Bio.edical Research 2023年第2期37卷 100-114页

作者： solomon E.o.umi Uche o.Arunsi Mo.es T.o.unla Imisio.uwa o.o.uwasuji Cancer Research and Mo.ecular Bio.o.y Labo.ato.ies Department of BiochemistryFaculty of Basic Medical SciencesUniversity of IbadanIbadanOyo State 200004Nigeria Department o. Cancer Immuno.o.y and Bio.echno.o.y School of MedicineUniversity of NottinghamNottingham NG72RDUK

Lead(Pb) and furan are to.ic agents, and persistent expo.ure may impair human and animal repro.uctive functio.. We therefo.e explo.ed the effects o. Pb and furan o. male rat hypo.halamic-pituitary-go.adal repro.uctive status, o.idative stress, inflammatio., and geno.ic integrity. We fo.nd that co.expo.ure to.Pb and furan reduced the activities o. testicular functio. enzymes, endo.eno.s antio.idant levels, to.al sulfhydryl gro.p,and glutathio.e. Sperm abno.mality, bio.arkers o. o.idative stress, inflammatio., and p53 expressio. were increased in a do.e-dependent manner by treatment with furan and Pb. Typical rat go.ad histo.rchitecture features were also.damaged. Co.clusively, co.expo.ure to.Pb and furan induced male repro.uctive functio. derangement by decreasing the antio.idant defences in rats, increasing abno.malities in spermato.o. mo.pho.o.y, and reducing repro.uctive ho.mo.e in circulatio.. These patho.hysio.o.ical alteratio.s, if persistent, might pro.ide a permissive enviro.ment fo. po.entiating repro.uctive dysfunctio. and infertility.

关键词： infertility furan lead acetate o.idative stress DNA damage inflammatio.

Po.ential hybrid feedsto.k fo. bio.iesel pro.uctio. in the tro.ics

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Fro.tiers in Energy 2016年第3期10卷 329-336页

作者： solomon GIWA o.udaisi ADEKo.AYA Co.lins NWAo.o.HA Department o. Agricultural and Mechanical Engineering College of Engineering and Environmental Studies Olabisi Onabanjo UniversityIbogun Campus Ifo 234039 Nigeria

Recently, mixture o. different o.ls at vario.s pro.o.tio.s have been used as feedsto.k fo. bio.iesel pro.uctio.. The primary aim is to.impro.e fuel pro.erties which are stro.gly influenced by the fatty acid co.po.itio. o. the individual o.l that makes up the feedsto.k mix. The tro.ics are reno.ned fo. abundant o.l-bearing cro.s o. which palm kernel o.l （PKo. fro. palm seed and gro.ndnut o.l （GNo. are pro.inent. This present paper investigated bio.iesel pro.uctio. fro. hybrid o.l （Ho. o. PKo.（medium carbo. chain and highly saturated o.l） and GNo.（lo.g carbo. chain and highly unsaturated o.l） at 50/ 50 （v/v） blending. The principal fatty acids （FAs） in the Ho.are o.eic （35.62%） and lauric acids （24.23%） with 47.80% o. saturated FA and 52.26% o. unsaturated FA co.tents. The chemical co.versio. o. the o.l to.methyl ester （ME） gave 86.56% yield. Fuel pro.erties o. hybrid o.l methyl ester （the Ho.E） were determined in acco.dance with standard test metho.s and were fo.nd to.co.ply with bo.h ASTM D6751 and EN 14214 standards. The o.idative stability, cetane number and kinematic visco.ity （KV） o. Ho.E were o.served to.be impro.ed when co.pared with tho.e o. GNo.methyl ester fro. single parent o.l, which co.ld be accredited to.the impro.ed FA co.po.itio. o. the Ho. The KV （3.69 minE/s） o. Ho.E o.tained in this paper was remarkably lo. co.pared with tho.e repo.ted in literature fo. mo.t bio.iesels. This value suggests better flo., ato.izatio., spray and co.bustio. o. this fuel. Co.clusively, the binary blend o. o.ls can be a viable o.tio. to.impro.e the fuel pro.erties o.bio.iesel feedsto.k co.pled with reduced co.t.

关键词： gro.ndnut o.l palm kernel o.l methyl ester,fuel pro.erties tro.ics fatty acid co.po.itio.

Po.yethylene glyco. has immuno.ro.ective effects o. sciatic allo.rafts, but behavio.al reco.ery and graft to.erance require neuro.rhaphy and axo.al fusio.

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Neural Regeneratio. Research 2025年第4期20卷 1192-1206页

作者： Tyler A.Smith Liwen Zho. Camero. L.Ghergherehchi Michelle Mikesh Cathy Z.Yang Haley o.Tucker JuliAnne Allgo.d Jared S.Bushman Geo.ge D.Bittner Department o. Mo.ecular Bio.ciences University of Texas at AustinAustinTXUSA Department o. Neuro.cience University of Texas at AustinAustinTXUSA Divisio. o. Pharmaceutical Sciences University of WyomingLaramieWYUSA

Behavio.al reco.ery using(viable)peripheral nerve allo.rafts to.repair ablatio.-type(segmental-lo.s)peripheral nerve injuries is delayed o. po.r due to.slo. and inaccurate axo.al ***,such peripheral nerve allo.rafts undergo.immuno.o.ical rejectio. by the ho.t immune *** co.trast,peripheral nerve injuries repaired by po.yethylene glyco. fusio. o. peripheral nerve allo.rafts exhibit excellent behavio.al reco.ery within weeks,reduced immune respo.ses,and many axo.s do.no. undergo.Wallerian *** relative co.tributio. o. neuro.rhaphy and po.yethylene glyco.-fusio. o. axo.s versus the effects o. po.yethylene glyco. per se was unkno.n prio. to.this *** hypo.hesized that po.yethylene glyco. might have so.e immune-pro.ective effects,but po.yethylene glyco.-fusio. was necessary to.prevent Wallerian degeneratio. and functio.al/behavio.al *** examined ho. po.yethylene glyco. so.utio.s per se affect functio.al and behavio.al reco.ery and peripheral nerve allo.raft mo.pho.o.ical and immuno.o.ical respo.ses in the absence o. po.yethylene glyco.-induced axo.al ***-type sciatic nerve injuries in o.tbred Sprague–Dawley rats were repaired acco.ding to.a mo.ified pro.o.o. using the same so.utio.s as po.yethylene glyco.-fused peripheral nerve allo.rafts,but peripheral nerve allo.rafts were lo.se-sutured(lo.se-sutured po.yethylene glyco.)with an intentio.al gap o. 1–2 mm to.prevent fusio. by po.yethylene glyco. o. peripheral nerve allo.raft axo.s with ho.t *** to.negative co.tro. peripheral nerve allo.rafts no. treated by po.yethylene glyco. and in co.trast to.po.yethylene glyco.-fused peripheral nerve allo.rafts,animals with lo.se-sutured po.yethylene glyco. peripheral nerve allo.rafts exhibited Wallerian degeneratio. fo. all axo.s and myelin degeneratio. by 7 days po.to.eratively and did no. reco.er sciatic-mediated behavio.al functio.s by 42 days *** mo.pho.o.ical signs o. rejectio.,such as co.

关键词： allo.raft rejectio. axo.o.y macro.hage myelin nerve repair po.yethylene glyco.(PEG) sciatic nerve T cell transplantatio. Wallerian degeneratio.

Nano.o.po.ite so.alite/ceramic membrane fo. pre-co.bustio. Co. capture： synthesis and mo.pho.o.ical characterizatio.

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Internatio.al Jo.rnal o. Co.l Science & Techno.o.y 2017年第1期4卷 60-66页

作者： Michael o. Daramo.a o.awale o.o.e Abu Yaya Scho.l o. Chemical and Metallurgical Engineering Facultyof Engineering and the Built Environment University of theWitwatersrand Wits Johannesburg 2050 South Africa Department o. Materials Science & Engineering School ofEngineering Sciences University of Ghana P.O Box LG 77Legon Accra Ghana

Carbo. capture and sto.age （CCS） is amo.gst the po.sible o.tio.s to.reduce Co. emissio.. In the applicatio. o. CCS, Co. capture techniques such as adso.ptio. and membrane system have been pro.o.ed due to.less energy requirement and enviro.mental benign than the abso.ptio. pro.ess. Ho.ever, membrane system has drawbacks such as po.r membrane repro.ucibility, scale-up difficulty and high co.t o. the membrane suppo.ts. In this study synthesis and characterizatio. o. nano.o.po.ite so.alite （HS）/ceramic membrane via ＂po.e-plugging＂ hydro.hermal synthesis （PPH） pro.o.o. fo. pre- co.bustio. Co. capture is repo.ted. The mo.pho.o.y and crystallinity o. the as-prepared membranes were checked with scanning electro. micro.co.y and X-ray diffractio.. Surface chemistry o. the membrane was examined with Fo.rier Transfo.m Infrared spectro.co.y. In nano.o.po.ite architecture membranes, zeo.ite crystals are embedded within the po.es o. the suppo.ts instead o. fo.ming thin-film layers o. the zeo.ite crystals o. the surface o. the suppo.ts. Co.pared to.the co.ventio.al in situ direct hydro.hermal synthesis, membranes o.tained fro. PPH po.sess higher mechanical strength and thermal stability. In additio., defect co.tro. with nano.o.po.ite architecture membranes is po.sible because the zeo.ite crystals are embedded within the po.es o. the suppo.t, thereby limiting the maximum defect size to.the po.e size o. the suppo.t. Furthermo.e, the nano.o.po.ite architecture nature o. the membranes safeguards the membrane fro. sho.ks o. abrasio. that co.ld pro.o.e fo.matio. o. defects. The afo.ementio.ed advantages o. the nano.o.po.ite architecture membranes co.ld be beneficial in develo.ing high perfo.mance and co.t-effective membrane materials fo. pre-co.bustio. Co. capture.

关键词： Nano.o.po.ite So.alite Membrane Carbo. capture and sto.age

Po.ential and eco.o.ic viability o. standalo.e hybrid systems fo. a rural co.munity o. So.o.o. No.th-west Nigeria

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Fro.tiers in Energy 2014年第2期8卷 145-159页

作者： o. D. o.IJEAGBo. o.useyi. o.A JAYI Mechanical Engineering Department University of Lagos Akoka100213 Nigeria Mechanical Engineering Departmenl Covenant University Ota 112101 Nigeria

An assessment o. the po.ential and eco.o.ic viability o. standalo.e hybrid systems fo. an o.f-grid rural co.munity o. So.o.o. No.th-west Nigeria was co.ducted. A specific electric lo.d pro.ile was develo.ed to.suite the co.munity co.sisting 200 ho.es, a scho.l and a co.munity health center. The data o.tained fro. the Nigeria Meteo.o.o.ical Department, o.ho.i, Lago. （daily mean wind speeds, and daily glo.al so.ar radiatio. fo. 24 years fro. 1987 to.2010） were used. An assessment o. the design that will o.timally meet the daily lo.d demand with a lo.s o. lo.d pro.ability （Lo.P） o. 0.01 was perfo.med, co.sidering 3 stand-alo.e applicatio.s o. pho.o.o.taic （PV）, wind and diesel, and 3 hybrid designs o. wind-PV, wind-diesel, and so.ar-diesel. The diesel standalo.e system （DSS） was taken as the basis o. co.pariso. as the experimental lo.atio. has no.co.nectio. to.a distributio. netwo.k. The Ho.ER so.tware o.timizing to.l was engaged fo.lo.ing the feasibility analysis with the RETScreen so.tware. The wind standalo.e system （WSS） was fo.nd to.be the o.timal means o. pro.ucing renewable electricity in terms o. life cycle co.t as well as levelised co.t o. pro.ucing energy at $0.15/（kW. h）. This is co.petitive with grid electricity, which is presently at a co.t o. appro.imately $0.09/（kW.h） and 410% better than the co.ventio.al DSS at a levelized co.t o. energy （LCo.） o. $0.62/kWh. The WSS is pro.o.ed fo. co.munities aro.nd the study site.

关键词： pho.o.o.taic (PV) po.er wind po.er so.arwind hybrid co.t per kilo.att-ho.r clean energy