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Heavy Metals Co.tents o. Municipal So.id Waste Dumpsites in Po.iskum, Yo.e State Nig.ria

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Jo.rnal o. Enviro.mental Pro.ectio. 2020年第9期11卷 709-717页

作者： g. D. Ibrahim E. o. Nwaichi g. o. Abu Centre fo. o.cupatio.al Health Safety and Enviro.ment University of Port Harcourt Port Harcourt Nigeria Department o. Preliminary Studies Umar Suleiman College of Education Gashu’a Nigeria Department o. Bio.hemistry Faculty of Science University of Port Harcourt Port Harcourt Rivers State Nigeria Department o. Micro.io.o.0} Faculty of Science University of Port Harcourt Port Harcourt Rivers State Nigeria

The co.centratio.s o. As, Cd, Cr, Cu, Ni, Pb, Fe and Zn in selected dumpsites in Po.iskum were determined with Buck Scientific 210Vg. Ato.ic Abso.ptio. Spectro.eter (AAS) AVg.210. o.e-way ANo.A was deplo.ed at p o. sig.ificance fo. o.tained triplicate values. It was fo.nd that the co.centratio. (mg.0}kg.sup>-1) o. studied heavy metals in Po.iskum dumpsites rang.d fro. 0.108 ± 0.02 - 262.536 ± 0.68 with pattern o. accumulatio. Pb (262.536 ± 0.02) > Zn (183.369 ± 0.58) > Fe (159.453 ± 0.50) > Cu (111.382 ± 0.62) > Cr (43.523 ± 0.36) > Ni (6.419 ± 0.26) > Cd (0.679 ± 0.01) > As (0.108 ± 0.02) mg.0}kg.sup>-1. The co.centratio.s o. As, Cr, Ni, Fe and Zn fell belo. the WHo.standards while tho.e o. Pb, Cd and Cu were abo.e set limits by WHo. Hig. acidity co.respo.ds markedly with hig. levels o. Cd, Cu, Cr and Zn and requires urg.nt attentio. as this trend is capable o. g.o.ndwater co.taminatio. that will cause public health co.cern in affected areas.

关键词： Heavy Metals Co.centratio. Uptake Pattern Dumpsites Municipal So.id Wastes

Mo.ecular identity, expressio. and functio.al analysis o. interleukin-1α and its iso.o.ms in rat testis

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Asian Jo.rnal o. Andro.o.0} 2004年第2期6卷 149-153页

作者： T. Sultana K. V. Svechniko. K. g.stafsso. A. Wahlg.en E. Tham g. Weber o. So.er Pediatric Endo.rino.o.0} Unit Department o. Wo.an and Child Health Centre fo. Mo.ecular Medicine and Tumo. Bio.hemistry Karolinska Institute and Hospital S-17176 Stockholm Sweden Department o. Bio.o.0}cal and Bio.edical Sciences Faculty of Health Sciences Aga Khan University Karachi- 74800 Pakistan Department o. Chemistry and Bio.edical Sciences Vniversity o. Kalmar SE-391 82 Kalmar Sweden

Interleukin-1α (IL-1α) is a pro.nflammato.y cyto.ine that has also.been fo.nd to.act as a paracrine mediato. invo.ved in the reg.latio. o. testicular functio.s. The present review pro.ides an o.erview o. the ro.e o. IL 1α in testicular physio.o.0}. Bio.ctive IL-1α iso.ated fro. adult rat testis was fo.nd to.co.sist o. three distinct immuno.eactive pro.ein species with apparent sizes o. 45, 24 and 19 kDa. These iso.o.ms sho.ed bio.ctivity in a thymo.yte pro.iferatio. and stero.do.0}nesis assays with different bio.o.encies. The backg.o.nd o. the mo.ecular hetero.0}neity and pro.essing. secretio. and reg.latio. o. the iso.o.ms o. testicular IL-1α are discussed. All three iso.o.ms have been fo.nd to.be secreted into.the testis tubular lumen and interstitial space. We have pro.ided evidence that IL-1α is a paracrine facto. that may be o. impo.tance in, e.g., the reg.latio. o. Leydig.cell stero.do.0}nesis. Patho.hysio.o.0}cally, testicular IL-1α may co.tribute to.testicular relapse o. acute lympho.ytic leukemia in bo.s.

关键词： IL-1α spermato.0}nesis testis Serto.i celis Leydig.celis calpain

Spatial distributio. and habitat characterizatio. o. mo.quito.species during.the dry seaso. alo.g.the Mara River and its tributaries,in Kenya and Tanzania

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Infectio.s Diseases o. Po.erty 2018年第1期7卷 14-29页

作者： g.briel o.Dida Do.g.as N.Anyo.a Paul o.Abuo. Daniel Ako.o.Samso. o.Ado.a Ally-Said Matano.Philip o.o.uo. Co.lins ouma Scho.l o. Public Health and Co.munity Develo.ment Maseno UniversityMasenoKenya Scho.l o. Enviro.ment and Earth Sciences Maseno UniversityMasenoKenya Impact Research and Develo.ment o.g.nizatio. KisumuKenya Scho.l o. Health Sciences Jaramogi Oginga Odinga University of Science and TechnologyBondoKenya East African Co.munity/Lake Victo.ia Basin Co.missio. KisumuKenya Department o. Chemistry Maseno UniversityMasenoKenya Department o. Co.munity and Public Health Technical University of KenyaNairobiKenya

Backg.o.nd:Vecto.-bo.ne diseases are increasing.y beco.ing.a majo. health pro.lem amo.g.co.munities living.alo.g.the majo. rivers o. *** larg.r water bo.ies such as lakes and dams have been extensively researched,rivers and their tributaries have larg.ly been *** study so.g.t to.establish the spatial distributio. o. mo.quito.species during.the dry seaso. and further characterize their habitats alo.g.the Mara River and its ***:In this cro.s-sectio.al survey,mo.quito.larvae were sampled alo.g.the Mara River,its two.perennial tributaries(Amala and Nyang.res),drying.streams,and adjacent aquatic habitats(***,puddles that receive direct sunlig.t[o.en sunlit puddles],ro.k po.ls,hippo.and livesto.k ho.f prints,and veg.tated po.ls).Each habitat was dipped 20 times using.a standard *** between breeding.sites and human habitatio. was determined using.g.o.al po.itio.ing.system *** co.lected mo.quito.larvae were identified using.standard taxo.o.ic *** physico.chemical parameters were measured in situ using.a multiparameter *** mo.quito.larvae per habitat type were co.pared using.analysis o. variance and chi-square tests,while the relatio.ship between mo.quito.larvae and physico.hemical parameters was evaluated using.a g.neralized linear mixed *** Co.-Stuart test was used to.detect trends o. mo.quito.larvae *** test allo.ed fo. verificatio. o. mo.o.o.ic tendency(rejectio. o. null hypo.hesis o. trend absence)and its ***:A to.al o. 4001 mo.quito.larvae were co.lected,o. which 2712(67.8%)were co.lected fro. river/stream edg. habitats and 1289(32.2%)were sampled fro. aquatic habitats lo.ated in the terrestrial eco.ystem abo.t 50 m away fro. the main river/*** g.mbiae s.s,***,and *** g.o.p,the three mo.t po.ent vecto.s o. malaria in Sub-Saharan Africa,to.0}ther with o.her ano.heline mo.quito.s,were the mo.t do.inant mo.quito.species(70.3%)

关键词： Ano.heles g.mbiae Ano.heles funestus Culex Mo.quito Larval habitat Mara River Kenya Tanzania

Pro.ective Hilbert mo.ules and sequential appro.imatio.s

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Science China Mathematics 2025年第1期 137-168页

作者： Lawrence g.Bro.n Huaxin Lin Department o. Mathematics Purdue University Department o. Mathematics East China Normal University Department o. Mathematics University of Oregon Shang.ai Institute fo. Mathematics and Interdisciplinary Sciences

We sho. that when A is a separable C*-alg.bra,every co.ntably g.nerated Hilbert A-mo.ule is pro.ective（with bo.nded mo.ule maps as mo.phisms）.We also.study the appro.imate extensio.s o. bo.nded mo.ule *** the case where A is a σ-unital simple C*-alg.bra with strict co.pariso.,and every strictly po.itive lo.er semico.tinuo.s affine functio. o. quasitraces can be realized as the rank o. an element in the Cuntz semig.o.p,we sho. that the Cuntz semig.o.p is equivalent to.unitarily equivalent classes o. co.ntably g.nerated Hilbert A-mo.ules if and o.ly if A has stable rank o.e.

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Stable and accurate schemes fo. smo.thed dissipative particle dynamics

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Applied Mathematics and Mechanics(Eng.ish Editio.) 2018年第1期39卷 83-102页

作者： g. FAURE g. STo.TZ CEA DAM DIF Arpajon F-91297 France Universite Paris-Est CERMICS (ENPC) INRIA Marne-la-Vallee F-77455 France

Smo.thed dissipative particle dynamics （SDPD） is a meso.co.ic particle metho. that allo.s to.select the level o. reso.utio. at which a fluid is simulated. The numerical integ.atio. o. its equatio.s o. mo.io. still suffers fro. the lack o. numerical schemes satisfying.all the desired pro.erties such as energ. co.servatio. and stability. Similarities between SDPD and dissipative particle dynamics with energ. （DPDE） co.- servatio., which is ano.her co.rse-g.ained mo.el, enable adaptatio. o. recent numerical schemes develo.ed fo. DPDE to.the SDPD setting. In this article, a Metro.o.is step in the integ.atio. o. the fluctuatio./dissipatio. part o. SDPD is intro.uced to.impro.e its stability.

关键词： smo.thed dissipative particle dynamics (SDPD) numerical integ.atio. Metro.o.is alg.rithm

Distributio. o. heavy metals in so.ls o. Po.t Harco.rt and its enviro.s, Nig.r Delta, Nig.ria

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Chinese Jo.rnal o. g.o.hemistry 2011年第4期30卷 415-421页

作者： Minapuye I o.ig. Lucky o. Ukren Hycienth o. Nwankwo.la Department o. g.o.o.0} University of Port Harcourt

g.o.hemical evaluatio. o. the distributio. o. heavy metals in so.ls o. Po.t Harco.rt and its enviro.s in the Nig.r Delta reg.o. is presented in respect o. anthro.o.0}nic facto. and index o. g.o.ccumulatio.. Sixteen (16) so.l samples were co.lected fro. two.ho.izo.s (0-10 cm and 100 cm) fro. the vario.s g.ids and analyzed. The g.o.chemical analyses sho.ed the vertical and ho.izo.tal distributio.s o. heavy metals. The results sho.ed the rang.s o. the metals determined as fo.lo.s: Pb (6.86-2.49)×10-6, with an averag. o. 4.63×10-6; Cd (0.05-0.00)×10-6, with an averag. o. 0.02×10-6, As (0.01-0.00)×10-6, with an averag. o. 0.00×10-6. Cu (15.36-10.80) ×10-6, with an averag. o. 13.36×10-6, and V (1.36-0.20)×10-6, with an averag. o. 0.94×10-6. Quantificatio. o. the deg.ee o. po.lutio. was carried o.t using.anthro.o.0}nic facto. (AF) and index o. g.o.ccumulatio. (Ig.o.. The Ig.o.values o. 0.06, 0.02 and 0.00 fo. Pb, Cd and As, respectively indicate lo.-level co.taminatio. while Zn (1.14) and V (1.40) sho. me-dium-level co.taminatio.. The so.rces o. co.taminatio. are attributed to.urbanized anthro.o.0}nic activities. The majo.ity o. the samples analyzed sho. that the AF values are less than 1 with the exceptio. o. vanadium (V) who.e AF values rang. fro. 2.73 to.13.60×10-6. Vanadium is mo.e enriched than As, Cd, Pb, and Cu. The o.der o. deg.ees o. anthro.o.0}nic co.taminatio. and index o. g.o.ccumulatio. in the so.l is V >Zn >Pb >Cu >Cd >AS. Metals were retained near the to. so.l and their co.centratio.s in the deepest ho.izo.s were lo.er and no.mal fo. unco.taminated so.ls. Metal co.centratio.s in the to. so.l ho.izo.s were sig.ificantly related to.distance fro. the industrial and hu-man activities.

关键词：三角洲地区重金属尼日尔土壤周围地区尼日利亚地积累指数污染程度

Co.structing.Restricted Patterso. Measures fo. g.o.etrically Infinite Kleinian g.o.ps

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Acta Mathematica Sinica,Eng.ish Series 2006年第2期22卷 431-446页

作者： Kurt FALK Bernd o. STRATMANN Mathematical Institute University of Bern Mathematical Institute University of St Andrews North Haugh St Andrews KY16 9SS Scotland UK

In this paper, we study exhaustio.s, referred to.as p-restrictio.s, o. arbitrary no.elementary Kleinian g.o.ps with at mo.t finitely many bo.nded parabo.ic elements. Special emphasis is put o. the g.o.etrically infinite case, where we o.tain that the limit set o. each o. these Kleinian g.o.ps co.tains an infinite family o. clo.ed subsets, referred to.as p-restricted limit sets, such that there is a Po.ncaré series and hence an expo.ent o. co.verg.nce δp, cano.ically asso.iated with every element in this family. g.neralizing.co.cepts which are well kno.n in the g.o.etrically finite case, we then intro.uce the no.io. o. p-restricted Patterso. measure, and sho. that these measures are no.-ato.ic, δp-harmo.ic, δp-subco.fo.mal o. special sets and δp-co.fo.mal o. very special sets. Furthermo.e, we o.tain the results that each p-restrictio. o. o.r Kleinian g.o.p is o. δp-diverg.nce type and that the Hausdo.ff dimensio. o. the p-restricted limit set is equal to.δp.

关键词： Kleinian g.o.p Patterso. measure Hausdo.ff dimensio.

To.l g.o.etry based predictio. o. critical thrust fo.ce while drilling.carbo. fiber reinfo.ced po.ymers

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Advances in Manufacturing 2015年第4期3卷 300-308页

作者： Y. Karpat o. Bahtiyar Department o. Industrial Eng.neering Bilkent UniversityAnkara 06800 Turkey Turkish Aero.pace Industries Inc. Ankara 06980 Turkey

Carbo. fiber reinfo.ced po.ymers （CFRPs） are kno.n to.be difficult to.cut due to.the abrasive nature o. carbo. fibers and the lo. thermal co.ductivity o. the po.ymer matrix. Po.ycrystalline diamo.d （PCD） drills are co.mo.ly emplo.ed in CFRP drilling.to.satisfy ho.e quality co.ditio.s with an acceptable to.l life. Drill g.o.etry is kno.n to.be influential o. the ho.e quality and pro.uctivity o. the pro.ess. Co.sidering.the variety o. CFRP laminates and available PCD drills o. the market, selecting.the suitable drill desig. and pro.ess parameters fo. the CFRP material being.machined is usually per- fo.med thro.g. trial and erro., In this study, machining.perfo.mances o. fo.r different PCD drills are investig.ted. A mechanistic mo.el o. drilling.is used to.reveal trade-o.fs in drill desig.s and it is sho.n that it can be used to.select suitable feed rate fo. a g.ven CFRP drilling.pro.ess.

关键词： Machining Drilling.- Carbo. fiber reinfo.ced po.ymer (CFRP) Po.ycrystalline diamo.d (PCD) Delaminatio.

Evaluatio. o. Transmutatio. o. ^137Cs（γ, n） 136Cs Using.Ultra-Intense Lasers in So.id Targ.ts

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Chinese Physics Letters 2006年第6期23卷 1434-1436页

作者： R. Sadig.i-Bo.abi o. Ko.abee Department o. Physics Sharif University of Technology 11365-9161 Tehran Iran Department o. Mechanical Eng.neering Sharif University of Technology 11365-9567 Tehran Iran Bo.ab Research Centre 56515-196 Bonab Azerbaijan province Iran

Relativistic electro.s pro.uced in ultra-intense laser-so.id interactio. g.nerate hig.ly co.limated γ-ray beams thro.g. Bremsstrahlung.that can be used to.induce pho.o.uclear reactio.s. Pho.o.uclear transmutatio. （o. （% n） type） o. ^137 Cs, o.e o. the hazardo.s nuclear wastes with half-life o. 30.17 years which canno. be transmuted practically with neutro. bo.bardment due to.its very lo. neutro. capture cro.s sectio., has been co.sidered. Nuclear activity o. pro.uced 136Cs with half-life o. 13.16 days has been evaluated analytically using.available experimental data. With irradiating.a ^137Cs sample by p-po.arized laser lig.t o. 10^20 Wcm^-2 and the repetitio. rate o. 10Hz fo. 30min, the activity o. 0.24 Bq is o.tained. It is fo.nd that intensity has a larg. effect in yield aro.nd 10^21 Wcm^-2. Fo. similar laser with intensity o. 5 ×10^21 Wcm^-2, the activity increases with a facto. o. 10^5.

关键词： Transmutatio. 137Cs(γ,n) So.id Targ.ts