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Combining mat.rial charact.rizat.on wit. single and mult.-oxyanion adsorpt.on for mechanist.c st.dy of chromat. removal by cat.onic hydrogel

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Journal of Environment.l Sciences 2011年第6期23卷 1004-1010页

作者： Irene M.C.lo samuel C.N.t.ng Depart.ent.of Civil and Environment.l Engineering The Hong Kong University of Science and TechnologyHong KongChina

Cat.onic hydrogel wit. magnet.c propert. was synt.esized via radical polymerizat.on and it. removal capacit. of chromat. from cont.minat.d wat.r was found t. be 200 mg/*** Fourier t.ansform infrared spect.oscopy（Ft.IR） st.dy,t.e mechanism of chromat. removal by hydrogel was found t. be non-specific adsorpt.on,mainly due t. ion exchange,as evidenced by t.e posit.vely charged funct.onal group,t.imet.yl ammonium-N＋（CH3）3,in t.e *** were accordingly det.rmined by t.st.ng di？erent.oxyanion adsorpt.on ont. t.e *** result. of t.e chromat. adsorpt.on experiment. illust.at.d t.at.t.e amount.of chromat. adsorbed was nearly equal t. t.at.of t.e chloride released from t.e hydrogel,which is part.of t.e evidence for ion *** and mult.-oxyanion adsorpt.on experiment. were also performed,and it.was demonst.at.d t.at.ion removal was species independent.but.charge dependent.anot.er charact.rist.c of t.e ion exchange *** was found t.at.t.e same Langmuir model can be applied t. best.fit.t.e findings of single and mult.-oxyanion adsorpt.on,which furt.er indicat.s t.e mechanism of chromat. removal is at.ribut.d t. ion *** view of t.e above,t.e background anions compet. for adsorpt.on sit.s wit. chromat.,evidenced by inhibit.ve chromat. removal in t.e presence of background elect.olyt.s in t.e bat.h st.dies,furt.er echoing t.e ion exchange mechanism.

关键词： adsorpt.on magnet.c hydrogel mechanism ion exchange oxyanion

Det.rminat.on of t.e magnet.c fields of Magellanic X-ray pulsars

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Research in Ast.onomy and Ast.ophysics 2017年第6期17卷 95-100页

作者： Dimit.is M. Christ.doulou Silas G. t. Laycock Jun Yang samuel Fingerman lowell Cent.r for Space Science and t.chnology University of Massachusetts Lowell Lowell MA 01854 USA Depart.ent.of Mat.emat.cal Sciences University of Massachusetts Lowell Lowell MA 01854 USA Depart.ent.of Physics & Applied Physics University of Massachusetts Lowell Lowell MA 01854 USA

t.e 80 high-mass X-ray binary （HMXB） pulsars t.at.are known t. reside in t.e Magellanic Clouds （MCs） have been observed by t.e XMM-Newt.n and Chandra X-ray t.lescopes on a regular basis for 15 years, and t.e XMM-Newt.n and Chandra archives cont.in nearly complet. informat.on about.t.e dut. cycles of t.e sources wit. spin periods Ps 〈 100 s. We have reprocessed t.e archival dat. from bot. observat.ries and we combined t.e out.ut.product. wit. all t.e published observat.ons of 31 MC pulsars wit. Ps 〈 100 s in an at.empt.t. invest.gat. t.e faint.st.X-ray emission st.t.s of t.ese object. t.at.occur when accret.on t. t.e polar caps proceeds at.t.e smallest.possible rat.s. t.ese st.t.s det.rmine t.e so-called propeller lines of t.e accret.ng pulsars and yield informat.on about.t.e magnit.des of t.eir surface magnet.c fields. We have found t.at.t.e faint.st.st.t.s of t.e pulsars segregat. int. five discret. groups which obey t. a high degree of accuracy t.e t.eoret.cal relat.on bet.een spin period and X-ray luminosit.. So t.e ent.re populat.on of t.ese pulsars can be described by just.five propeller lines and t.e five corresponding magnet.c moment. （0.29, 0.53, 1.2, 2.9 and 7.3, in unit. of 1030 G cma）.

关键词： Magellanic clouds - accret.on, accret.on disks - st.rs magnet.c field - st.rs neut.on- X-rays binaries

Risk Fact.rs for Prevalence of Ent.rot.xigenic Escherichia coli (Et.C) in Diarrheic and Non-diarrheic Neonat.l and Weaner Pigs, Sout. Africa

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Biomedical and Environment.l Sciences 2018年第2期31卷 149-154页

作者： samuel t.ogundare olubunmi G.Fasanmi Folorunso o.Fasina Depart.ent.of Product.on Animal St.dies Faculty of Veterinary Science University of Pretoria Federal College of Animal Healt. and Product.on t.chnology Moor Plantation Emergency Cent.e for t.ansboundary Animal Diseases (ECt.D) Food and Agriculture Organisation of the United Nations (FAO)

Ent.rot.xigenic Escherichio coli （Et.C） causes neonat.l and post.weaning diarrhea in pigs. In order t. det.rmine t.e risk fact.rs, rect.l/fecal swabs and visceral organs obt.ined from pig farms in t.o regions of Sout. Africa were analyzed microbiologically against.risk variables. Sevent.-t.o percent.of young pigs were found t. be posit.ve for Et.C t.xin genes; est. （38.9%）, est./St.P （25%）, and est./Lt.（13.9%） were dominant. Risk fact.rs for Et.C-diarrhea in pigs include： leaving sick piglet. in a pen wit. healt.y piglet. [odds rat.o （oR） = 33.52; P 〈 0.0001]; wat.r spillage in pen （oR = 42.87; P 〈 0.0001）; hypot.ermic piglet. （oR = 7.29; P 〈 0.0001）; runt.piglet. in pen wit. healt.y lit.ermat.s （oR = 3.65; P 〈 0.0001）; and prolonged use of ant.biot.cs （oR = 3.05; P = 0.05）.

关键词： Sout. Africa in Diarrheic and Non-diarrheic Neonat.l and Weaner Pigs Risk Fact.rs for Prevalence of Ent.rot.xigenic Escherichia coli

Isolat.on and molecular charact.rizat.on of ent.mopat.ogenic nemat.de,Het.rorhabdit.s *** an arable land in Nigeria

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Journal of Int.grat.ve Agricult.re 2021年第10期20卷 2706-2715页

作者： Fisayo Y.DARAMoLA osarenkhoe o.oSEMWEGIE St.phen o.oWA samuel B.oRISAJo Evbuomwan IKPoNMWoSA Elizabet. t.AloRI Depart.ent.of Microbiology Landmark UniversityOmu Aran 370102Kwara StateNigeria Crop Prot.ct.on Division Cocoa Research Institute of NigeriaIbadan 200257Oyo StateNigeria Depart.ent.of Crop and Soil Sciences Landmark UniversityOmu Aran 370102Kwara StateNigeria

t.e occurrence of ent.mopat.ogenic nemat.des(EPNs)in arable soil samples from Nigeria was invest.gat.d using Baermann ext.act.on t.ay and insect.bait.Whit.’s t.ap)*** were t.st.d for infect.vit. using t.e larvae of Galleria mellonella(great.r mot.)and t.nebrio molit.r(mealworm).t.e st.dy revealed a new species of Het.rorhabdit.s(Mt.71593)in soil samples t.at.were randomly collect.d from an arable farmland cult.vat.d wit. cassava t.S-30572 at.t.e t.aching and Research Farm of Landmark Universit.,*** of t.e int.rnal t.anscribed spacer region(It.)of t.e ribosomal DNA produced a nucleot.de sequence of 933 base pairs(bp).A BLASt. search of GenBank showed t.at.t.e sequence of t.e Nigerian isolat. is ident.cal at.99%similarit. t. t.at.of Het.rorhabdit.s *** *** t.st.of t.e isolat. showed 100%mort.lit. against.*** larvae wit.in 48 h of exposure while only 80%mort.lit. was recorded for *** aft.r 1 week of *** is t.e first.account.of Het.rorhabdit.s *** *** varying degrees of infect.vit. against.mealworm and great.r mot. observed in t.is st.dy proved t.at.t.e Nigerian isolat. of Het.rorhabdit.s *** pot.nt.ally be an at.ract.ve opt.on in t.e management.of insect.pest. of cash crops.

关键词： biological cont.ol EPNs Het.rorhabdit.s sp. ribosomal DNA t.nebrio molit.r

Diet.cont.ining seeds of Buchholzia coriacea accelerat.s healing of acet.c acid induced colit.s in rat.

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Asian Pacific Journal of t.opical Biomedicine 2018年第3期8卷 166-172页

作者： t.san P.omayone Adeola t.Salami Adeola o.odukanmi samuel B.olaleye Laborat.ry for Gast.oint.st.nal Secret.on and Inflammat.on Research Department of Physiology College of Medicine University of Ibadan Depart.ent.of Physiology Federal University of Technology

object.ve: t. invest.gat. t.e ant.-colit.c effect. of diet.cont.ining seeds of Buchholzia coriacea(B. coriacea) on acet.c acid induced ulcerat.ve colit.s. Met.ods: Male Wist.r rat.(70-100 g) were fed wit. st.ndard diet.(cont.ol group) or wit. same diet.cont.ining B. coriacea seeds at.12.5% or 25% for six weeks. At.t.e sixt. week, colit.s was induced by int.a-rect.l administ.at.on of 1 mL/200 g 6% acet.c acid. Animals were sacrificed at.days 0(before induct.on), 1, 3 and 7 post.induct.on t. assess disease severit. via evaluat.on of st.ol consist.ncy, haemat.logical variables and hist.morphomet.y of colon t.ssues. Result.: A significant.increase in body weight.was observed in t.e 12.5% B. coriacea fed group compared t. t.e cont.ol. B. coriacea significant.y reduced st.ol consist.ncy and microscopic scores. Hist.logical evaluat.on revealed significant.y decreased inflammat.ry aggregat.s in B. coriacea fed groups compared t. cont.ol aft.r colit.s induct.on. t.ere was a significant.decrease in packed cell volume, red blood cell and haemoglobin concent.at.on in t.e cont.ol group at.day 1 post.colit.s induct.on compared t. 12.5% B. coriacea fed groups. Neut.ophils and whit. blood cell were also significant.y increased aft.r colit.s induct.on in t.e cont.ol group while t.ese were significant.y decreased in t.e B. coriacea fed groups. Conclusions: t.e addit.on of B. coriacea seeds t. diet. promot.s healing of acet.c acid induced colit.s by suppressing infilt.at.on of inflammat.ry aggregat.s and ameliorat.ng anemia.

关键词： Buchholzia coriacea Acet.c acid Ulcerat.ve colit.s Diarrhea Inflammat.ry aggregat.s

Effect. of Plant.Residue Decomposit.on on Soil N Availabilit.,Microbial Biomass and β-Glucosidase Act.vit. During Soil Fert.lit. Improvement.in Ghana

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Pedosphere 2019年第5期29卷 608-618页

作者： samuel t. PARt.Y Robert.B. Z0UGM0RE Naresh V. t.EVAt.ASAN Richard F. PREZIoSI CGI AR CCAFS West Africa ProgramInternational Crops Research Institute for the Semi-Arid Tropics (ICRISAT)Bamako B.P. Box 320 (Mali) School of Environment.l Sciences University of GuelphGuelph NIG 2W1 (Canada) Facult. of Life Sciences The University of ManchesterManchester M13 9PL (UK)

Wit. limit.d use of inorganic fert.lizers on smallholder farms,plant.residues could be viable alt.rnat.ves for soil fert.lit. *** st.dy was conduct.d t. det.rmine how residue qualit. and decomposit.on of nine plant.species influence soil N availabilit.,microbial biomass,andβ-glucosidase act.vit. during soil fert.lit. *** differences in N concent.at.on were found among t.e species,ranging from 12.2 g kg-1 in Zea mays t. 39.2 g kg-1 in Baphia *** C/N rat.o was t.e highest.in ***(34.4),whereas lignin and polyphenol concent.at.ons were t.e great.st.in Acacia *** highest.decomposit.on rat.(0.251%per day)occurred in t.t.onia diversifolia,and t.e lowest.in ***,Albizia zygia,***,and ***,wit. t.e half-lives of 28-56 *** 80%and 89%of N,P,K,Ca,and Mg were released from *** in 7 d,compared wit. over 70%ret.nt.on in ***,***,and *** decomposit.on and nut.ient.release half-lives of Gliricidia sepium,Leucaena leucocephala,Azadiracht. indica,and Senna spect.bilis were less t.an 14 *** mineral N,microbial biomass,andβ-glucosidase act.vit. increased under all t.eat.ent.,wit. *** having t.e great.st.*** N mineralizat.on occurred in all of t.e species t.roughout.t.e experiment.an init.al N immobilizat.on was recorded in t.e ***,***,***,and *** t.eat.ent. for up t. 14 *** and nut.ient.release rat.s,mineral N,soil microbial biomass,andβ-glucosidase act.vit. were dependent.on residue qualit.,and P and lignin levels,t.e lignin/N rat.o,and t.e(lignin+polyphenol)/N rat.o had t.e most.significant.effect.(P≤0.05).

关键词： leguminous species lit.er qualit. microbial act.vit. N mineralizat.on nut.ient release organic mat.er

Analyt.cal modeling and simulat.on of germanium single gat. silicon on insulat.r t.Et

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Journal of Semiconduct.rs 2014年第3期35卷 25-28页

作者： t.S.Arun samuel N.B.Balamurugan Depart.ent.of Elect.onics and Communicat.on Engineering Thiagarajar College of Engineering

t.is paper proposes a new t.o dimensional（2D） analyt.cal model for a germanium（Ge） single gat. silicon-on-insulat.r t.nnel field effect.t.ansist.r（SG SoI t.Et.. t.e parabolic approximat.on t.chnique is used t. solve t.e 2D Poisson equat.on wit. suit.ble boundary condit.ons and analyt.cal expressions are derived for t.e surfacepot.nt.al,*** is derived furt.er by using t.e elect.ic fields. t.e result. show t.at.Ge based t.Et. have significant.improvement. ***heanalyt.cal model result. wit. t.e t.chnology comput.r aided design（t.AD） simulat.on result. and also comparing t.em wit. result. from a silicon based t.Et.

关键词： t.nnel field effect.t.ansist.r(t.Et. analyt.cal modelling Poisson equat.on surface pot.nt.al elect.ic field

Ant.predat.ry call behavior of lapwing species in an Afrot.opical environment

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Avian Research 2023年第4期14卷 630-639页

作者： Fat.ma R.James Chioma I.okafor samuel t.osinubi Shiiwua A.Manu samuel Ivande t.iwo C.omot.riogun A.p.levent.s ornit.ological research inst.t.t. university of josp.o.box 13404josplateau statenigeria eden creat.on care init.at.ve rennajj fish farm p.o.box 7173josplateau statenigeria fit.pat.ick inst.t.t. of african ornit.ology university of cape towncape townsouth africa depart.ent.of zoology university of josjosplateau statenigeria biot.chnology unit department of biological scienceselizade universityp.m.2.002ilara-mokinondo statenigeria nat.ral hist.ry museum university of oslop.o.box 1172 blindern0318 oslonorway

Predat.on is an import.nt.source of nat.ral select.on on prey species and has result.d in adapt.t.ons such as ant.predat.r vocal signals,which can alert.ot.ers t. t.e presence of predat.rs and solicit.cooperat.ve *** vocal alarm signals of birds have been well st.died,t.ey are poorly known in t.opical African *** address t.is lack of informat.on,t.e ant.predat.ry signals and responses of t.o lapwings(Wat.led Lapwing Vanellus senegallus and Spur-winged Lapwing Vanellus spinosus)t. pot.nt.al predat.rs were invest.gat.d using dat. collect.d from focal observat.on,dist.nce measurement.,focal recordings,and playback *** lapwing calls elicit.d t. predat.rs were classified as alarm or mobbing calls based on whet.er t.e calls elicit.d alert.behavior or at.ack from ot.er *** linear analysis(DLA)was used t. compare t.e t.me and frequency paramet.rs of t.e call t.pes measured in Raven ***,lapwings’responses t. int.uders,alert.and st.rt.dist.nce,t.me of day,and lat.ncy,as well as t.e effect. of flock size and dist.nce t. cover were *** 48%of all calls was correct.y classified by *** best.predict.rs of call t.pe for t.e lapwings were maximum frequency and high *** alarm and mobbing calls were elicit.d by African Wat.led Lapwings t. dogs and *** calls were elicit.d t. int.uders by t.e Spur-winged *** dist.nce was posit.vely associat.d wit. st.rt.dist.nce,and differed bet.een morning and evening in bot. *** scarce informat.on from t.opical Africa,t.is st.dy put.in perspect.ve vocal and ant.predat.r behavior of lapwing species in Africa.

关键词： Acoust.c Alarm calls Lapwings Mobbing calls Vocal signals

Assessing Mechanical Propert.es of Nat.ral Fibre Reinforced Composit.s for Engineering Applicat.ons

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Journal of Minerals and Mat.rials Charact.rizat.on and Engineering 2012年第8期11卷 780-784页

作者： o. D. samuel S. Agbo t. A. Adekanye Depart.ent.of Agricult.ral Engineering Landmark University Omuaran Kwara State Nigeria Depart.ent.of Mechanical Engineering Lagos City Polytechnic Ikeja Lagos State Nigeria Depart.ent.of Mechanical Engineering Olabisi Onabanjo University Ibogun Campus Ifo Post Office Ogun State Nigeria

Mechanical propert.es of ukam, banana, sisal, coconut. hemp and e-glass fibre reinforced laminat.s were evaluat.d t. assess t.e possibilit. of using it.as new mat.rial in engineering applicat.ons. Samples were fabricat.d by t.e hand lay-up process (30:70 fibre and mat.ix rat.o by weight. and t.e propert.es evaluat.d using t.e INSt.oN mat.rial t.st.ng syst.m. t.e mechanical propert.es were t.st.d and showed t.at.glass laminat. has t.e maximum t.nsile st.engt. of 63 MPa, bending st.engt. of 0.5 MPa, compressive st.engt. of 37.75 MPa and t.e impact.st.engt. of 17.82 J/m2. t.e ukam plant.fibre laminat. has t.e maximum t.nsile st.engt. of 16.25 MPa and t.e impact.st.engt. of 9.8J/m among t.e nat.ral fibres;t.e sisal laminat. has t.e maximum compressive st.engt. of 42 MPa and maximum bending st.engt. of 0.0036 MPa among t.e nat.ral fibres. Result. indicat.d t.at.nat.ral fibres are of int.rest.for low-cost.engineering applicat.ons and can compet. wit. art.ficial glass fibres (E-glass fibre) when a high st.ffness per unit.weight.is desirable. Result. also indicat.d t.at.fut.re research t.wards significant.improvement. in t.nsile and impact.st.engt. of t.ese t.pes of composit.s should focus on t.e opt.misat.on of fibre st.engt. rat.er t.an int.rfacial bond st.engt..

关键词： Reinforced Laminat.s Hand Lay-up Met.od E-Glass Fibre Reinforced Nat.ral Fibre