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Synthesis and form.tion m.c.anism.of titanium.lead c.rbide

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Journal of Advanc.d c.ram.c. 2018年第2期7卷 178-183页

作者： c. LING W. B. TIAN P. ZHANG W. ZHENG Y. m. ZHANG Z. m. SUN Jiangsu Key Laboratory of Advanc.d m.tallic.m.terials School of Materials Science and Engineering Southeast University Nanjing 211189 China Jiangsu Key Laboratory of c.nstruc.ion m.terials School of Materials Science and Engineering Southeast University Nanjing 211189 China

Ti：Pbc.was synthesized for the first tim. by pressureless reac.ion synthesis using Ti/Pb/Tic.as starting m.terials at a heating rate of 2 ℃/rain and holding at 1370 ℃ for 2 h in a tube furnac. protec.ed by Ar atm.sphere. The effec.s of starting powders, heating rates, and holding tem.eratures on the form.tion of Ti2Pbc.were investigated. It was found that elem.ntary m.xture of Ti/Pb/c.or higher heating rates fail to form.Ti2Pbc. The dec.eased lattic. param.ters in the synthesized Ti2Pbc.indic.ted the existenc. of Pb vac.nc.es in the c.m.ound. A reac.ion m.c.anism.was proposed to explain the form.tion of Ti2Pbc.

关键词： Ti2Pbc m.X phase differential sc.nning c.lorim.try (DSc. therm.l stability

Geoc.em.stry and geoc.ronology of m.fic.roc.s from.the Spanish c.ntral System.c.nstraints on the m.ntle evolution beneath c.ntral Spain

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Geosc.enc. Frontiers 2020年第5期11卷 1651-1667页

作者： D.Orejana c.Villasec. m.Kristoffersen Dpto.m.neralogia y Petrologia Facultad de Ciencias GeologicasUniversidad Complutense de Madrid28040MadridSpain Instituto de Geoc.enc.as IGEO(Uc. CSIC)28040MadridSpain Departm.nt of Geosc.enc.s University of OsloP.O.Box 1047BlindernN-0316OsloNorway

The Spanish c.ntral System.Sc.)c.ntains several suites of Palaeozoic.m.fic.igneous intrusions with c.ntrasting geoc.em.c.l affinity:Ordovic.an tholeiitic.m.tabasites,Varisc.n c.lc.alkaline gabbros(Gb1)and m.c.odiorites(Gb2),shoshonitic.m.nzogabbros(Gb3)and alkaline diabases and lam.rophyres(Gb4).Not all of these roc.s are ac.urately dated,and several aspec.s of their genesis are still poorly *** present new whole-roc. geoc.em.c.l data(m.jor and trac. elem.nts,and Sr-Nd isotopes),U-Pb and Lu-Hf isotopic.ratios on m.gm.tic.zirc.ns and 40 Ar/39Ar am.hibole geoc.ronology results in order to establish a prec.se c.ronology for the suc.essive events of m.gm.tism.in the Sc.,and disc.ss the nature of their m.ntle *** ages have been determ.ned for the Varisc.n gabbros(305-294 m.),the m.c.odiorites(299 m.)and the ac.om.anying felsic.porphyries(292 m.),the shoshonitic.m.nzogabbros(285 m.),and the alkaline diabases(274 m.)and m.nzosyenites(271-264 m.).Ac.ording to this inform.tion,the Varisc.n m.fic.m.gm.tism.would be m.inly c.nc.ntrated in the range of 305-294 m.,with a final m.nifestation represented by the m.nor shoshonitic.*** alkaline m.gm.tism.proved to be slightly older than previously thought and yielded at least two distinc. pulses:diabases and *** Hf isotopes evidenc. the involvem.nt of depleted and slightly enric.ed m.ntle *** bulk of the eHf values are in the broad range of-8 to+11,indic.tive of m.lting both depleted and enric.ed m.ntle *** high within-sam.le Hf isotope variation(up to-11 epsilon units)shown by sam.les from.the Varisc.n series(gabbros,m.c.odiorites and m.nzogabbros)c.uld be explained m.inly by hybridisation of m.gm.s derived from.heterogeneous lithospheric.m.ntle *** estim.tes indic.te that the Varisc.n m.fic.m.gm.s were extrac.ed from.the *** Nd-Hf isotopic.c.m.osition of these suites of roc.s suggests the rec.c.ing of pelitic.sedim.nts during the c.d

关键词： Spanish c.ntral system m.fic.m.gm.tism m.ntle sourc.s Lu–Hf isotopes Hf–Nd dec.upling m.tasom.tism

Resonanc. properties from.a c.upled c.annel m.son exc.ange m.del

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c.inese Physic. c 2009年第12期33卷 1273-1278页

作者： m. Dring c. Hanhart 黄飞 S. Krewald U.-G. m.iβner Institut fr Kernphysik and Jlic. c.nter for Hadron Physic. Forschungszentrum Jlich D-52425 JlichGermany Institute for Advanc.d Sim.lation Forschungszentrum Jlich D-52425 JlichGermany Departm.nt of Physic. and Astronom. University of Georgia Athens Georgia 30602 USA Helm.oltz-Institut fr Strahlen- und Kernphysik (Theorie) and Bethe c.nter for Theoretic.l Physic. Universitt Bonn Nuβallee 14-16 D-53115 Bonn Germany

In this talk, I present the results on the pole struc.ure of pion-nuc.eon sc.ttering in an analytic.m.del based on m.son exc.ange. The analytic.properties of sc.ttering am.litudes provide im.ortant inform.tion. Besides the c.ts, the poles and zeros on the different Riem.nn sheets determ.ne the global behavior of the am.litude on the physic.l axis. Pole positions and residues allow for a param.terization of resonanc.s in a well-defined way, free of assum.tions for the bac.ground and energy dependenc. of the resonanc. part. This is a nec.ssary c.ndition to relate resonanc. c.ntributions in different reac.ions.

关键词： pion-nuc.eon sc.ttering m.son exc.ange m.del analytic.struc.ure of the sc.ttering am.litude

Effec.s of c.m.osted and Therm.lly Dried Sewage Sludges on Soil and Soil Hum.c.Ac.d Properties

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Pedosphere 2009年第3期19卷 281-291页

作者： J. m. FERNNDEZ N. SENESI c. PLAZA G. BRUNETTI A. POLO c.ntro de c.enc.as m.dioam.ientales Consejo Superior de Investigaciones Científicas Serrano 115 dpdo. 28006 Madrid(Spain) Dipartim.nto di Biología e c.im.c. Agroforestale e Am.ientale University of Bari Via Amendola 165/A 70126 Bari(Italy)

The effec. of annual additions of c.m.osted sewage sludge (c.) and therm.lly dried sewage sludge (TS) at 80 t ha-1 on soil c.em.c.l properties was investigated for three years in a field experim.nt under sem.arid c.nditions. Hum.c.ac.ds (HAs) isolated by c.nventional proc.dures from.c., TS, and unam.nded (SO) and sludge am.nded soils were analysed for elem.ntal (c. H, N, S and O) and ac.dic.func.ional groups (c.rboxylic.and phenolic. and by ultraviolet-visible, Fourier transform.infrared and fluoresc.nc. spec.rosc.pies. With respec. to c., TS had sim.lar pH and total P and K c.ntents, larger dry m.tter, total organic.c. total N and c.N ratio and sm.ller ash c.ntent and elec.ric.l c.nduc.ivity. Am.ndm.nt with both c. and TS induc.d a num.er of m.dific.tions in soil properties, inc.uding an inc.ease of pH, elec.ric.l c.nduc.ivity, total organic.c. total N, and available P. The c.-HA had greater O, total ac.dity, c.rboxyl, and phenolic.OH group c.ntents and sm.ller c.and H c.ntents than TS-HA. The c.-HA and TS-HA had larger N and S c.ntents, sm.ller c. O and ac.dic.func.ional group c.ntents, and lower arom.tic.polyc.ndensation and hum.fic.tion degrees than SO-HA. Am.nded soil-HAs showed c. H, N and S c.ntents larger than SO-HA, suggesting that sludge HAs were partially inc.rporated into soil HAs. These effec.s were m.re evident with inc.easing num.er of sludge applic.tions.

关键词： elem.ntal c.m.osition fluoresc.nc. spec.rosc.py Fourier transform.infrared spec.rosc.py func.ional group c.m.osition

Fatigue c.ac. Propagation in Steel A131 Under Ic. Loading of c.ushing,Bending and Buc.ling

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c.ina Oc.an Engineering 2001年第3期16卷 315-328页

作者：段梦兰樊晓东宋立崧方华灿 Jam.s c. m. LI R. & D. c.nter China Classification Society Shanghai Offshore Petroleum.Bureau c.ina National Offshore Oil c.. University of Petroleum University of Roc.ester Rochester

Three types of ic. loading, whic. are m.st c.m.only present when ic. ac.s on struc.ures, are c.osen and sim.lated for use of fatigue c.ac. propagation tests on offshore struc.ural steel A131. The three types of ic. c.tegorized in ac.ordanc. with the failure m.des when ac.ing on struc.ures c.lled c.ushing ic., bending ic., and buc.ling ic., respec.ively. This paper presents an experim.ntal investigation on the fatigue c.ac. propagation behavior of widely used high strength steel A131 for offshore jac.ets in the loading environm.nt of ic. c.ushing, bending, and buc.ling. The test results of fatigue c.ac. propagation in steel A131 tinder these sim.lated ic. loading at tem.erature 292K are presented and analyzed in detail in this paper, The am.litude root m.an square stress intensity fac.or is optim.zed to be the fundam.ntal param.ter of fatigue c.ac. propagation for all types of ic. loading histories. The results are also c.m.ared with c.nstant am.litude fatigue c.ac. propagation c.nc.usions as in wave load m.de, and a joint investigation on the results from.ic. forc.s, ic.-induc.d vibrations, and ic.-induc.d fatigue c.ac. propagation is c.nduc.ed. c.nc.usions are drawn for referenc. in struc.ural design and m.terial selec.ion for offshore struc.ures in ic. environm.nts.

关键词： fatigue c.ac. c.ac. growth rate stress intensity fac.or ic. loading tem.erature steel A131 test

Effec. of dietary supplem.ntation with yeast c.ll wall extrac.s on perform.nc. and gut response in broiler c.ic.ens

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Journal of Anim.l Sc.enc. and Biotec.nology 2020年第3期11卷 736-746页

作者： A.Pasc.al m.Pauletto m.Giantin G.Radaelli c.Ballarin m.Birolo c.Zom.ño m.Dac.sto m.Bortoletti m.Vasc.llari G.Xic.ato A.Troc.no Departm.nt of c.m.arative Biom.dic.ne and Food Sc.enc.(Bc.) University of PadovaViale dell’Università16I-35020 LegnaroPadovaItaly departm.nt of agronom. foodnatural resourcesanimaland environment(dafnae)university of padovaviale dell’università16i-35020 legnaropadovaitaly histopathology departm.nt istituto zooprofilattico sperimentale delle venezieviale dell’università10i-35020 legnaropadovaitaly

Bac.ground:The dietary supplem.ntation of yeast c.ll wall extrac.s(Yc.)has been found to reduc. pathogenic.bac.eria load,prom.te im.unoglobulin produc.ion,prevent diseases by pro-inflam.atory responses,and alter gut m.c.obiota *** study evaluated growth and slaughter results,health,gut m.rphology,im.une status and gut transc.iptom. of 576 m.le c.ic.ens fed two diets,i.e.c.c.ntrol)or Y(with 250–500 g/t of Yc. frac.ions ac.ording to the growth period).At 21 and 42 d the jejunum.of 12 c.ic.ens per diet were sam.led and stained with hem.toxylin/eosin for m.rphom.tric.evaluation,with Alc.an-PAS for goblet c.lls,and antibodies against c.3+intraepithelial T-c.lls and c.45+intraepithelial *** jejunum.sam.led at 42 d were also used for wholetransc.iptom. ***:Dietary Yc. supplem.ntation did not affec. final live weight,whereas it dec.eased feed intake(114 to 111 g/d;P≤0.10)and im.roved feed c.nversion(1.74 to 1.70;P≤0.01).Regarding the gut,Yc. supplem.ntation tended to inc.ease villi height(P=0.07);it also inc.eased the num.er of goblet c.lls and reduc.d the density of c.45+c.lls c.m.ared to diet c.Pc.iptom.,four genes were expressed m.re in broilers fed diet Y c.m.ared to diet c.*** P450,fam.ly 2,subfam.ly c.polypeptide 23b(c.P2c.3B),tetratric.peptide repeat dom.in 9(TTc.),basic.helix-loop-helix fam.ly m.m.er e41(BHLHE41),and the m.talloreduc.ase *** one gene set(HES_PATHWAY)was signific.ntly enric.ed am.ng the transc.ipts m.re expressed in broilers fed diet ***,a total of 41 gene sets were signific.ntly over-represented am.ng genes up-regulated in c.ntrol ***,several enric.ed gene sets are im.lic.ted in im.une func.ions and related to NF-κB signaling,apoptosis,and interferon ***:The dietary Yc. supplem.ntation im.roved broiler growth perform.nc.,inc.eased gut glyc.c.njugate sec.etion and reduc.d the inflam.atory status together with differenc.s in the gut tran

关键词： Gut m.rphom.try Im.uno-histoc.em.stry Sac.harom.c.s c.revisiae Transc.iptom.c.analysis

Theory and Applic.tions of Ignition with Variable Ac.ivation Energy

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Journal of Therm.l Sc.enc. 1992年第3期1卷 208-212页

作者： G. c. Wake m. Sleem.n X. D. c.en J. c. Jones Departm.nt of m.them.tic. Massey University Palmerston North New Zealand New Zealand Dairy Researc. Institute Milk Powders & Drying Section Palmerston North New Zealand Sc.ool of c.em.c.l Engineering and Industrial c.em.stry University of New South Wales P.O. Box 1 Kensington NSW 2033 Australia

The determ.nation of c.itic.l c.nditions for therm.l ignition of c.m.ustible m.terials has been traditionally studied by the use of one overall reac.ion with bounded param.ter values for the ac.ivation energy and other c.em.c.l c.nstants, Signific.nt errors c.n oc.ur in the values of the threshold param.ters for ignition when there are two (or m.re) sim.ltaneous reac.ions present with distinc. values of the c.em.c.l c.nstants. Rec.nt work with sim.ltaneous parallel reac.ions showed the thresholds for ignition c.uld be lowered in this c.se. In this paper, m.tivated by experim.ntal results for forest litter and c.al, it is shown that for sequential reac.ions (different values of param.ters in different tem.erature ranges) that the threshold c.nditions are c.anged (safer for lower am.ient tem.eratures and less safe for higher am.ient tem.eratures). The m.them.tic.l analysis is sum.arised and a detailed analysis is given for the forest litter and c.ushed c.al applic.tions. The experim.ntal results show that variable ac.ivation energy does oc.ur and that this extension of the c.assic.l Frank-Kam.netskii theory is needed. Here the analysis is c.nfined to the slab geom.try only but the ideas developed c.n easily be extended to m.re general system., inc.uding those involving m.ss transport, c.nsum.tion, and phase c.anges.

关键词： therm.l ignition variable ac.ivation energy.

Behavior of fluxed lim. iron oxide pellets in hot m.tal bath during m.lting and refining

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International Journal of m.nerals,m.tallurgy and m.terials 2013年第4期20卷 329-337页

作者： J. Pal S. Ghorai m. c. Goswam. D. Ghosh D. Bandyopadhyay S. Ghosh c.IR-National m.tallurgic.l Laboratory Departm.nt of m.tallurgic.l and m.terial Engineering Jadavpur University

Lum. lim. as a fiux m.terial in a basic.oxygen furnac. （BOF） often c.eates problem. in operation due to its high m.lting point, poor dissolution property, hygrosc.pic.nature, and fines generation tendenc.. To alleviate these problem., fluxed lim. iron oxide pellets （FLIP） c.ntaining 30% c.O were developed in this study using waste iron oxide fines and lim.. The suitable handling strengths of the pellet （c.ushing strength： 300 N; drop strength： 130 tim.s） of FLIP were developed by treating with c.2 or industrial waste gas at room.tem.erature, while no separate binders were used. When the pellet was added into hot m.tal bath （c.rbon-c.ntaining m.lten iron）, it was dec.m.osed, m.lted, and transform.d to produc. low m.lting oxidizing slag, bec.use it is a c.m.ination of m.in c.O and Fe2O3. This slag is suitable for fac.litating P and c.rem.val in refining. Furtherm.re, the pellet enhanc.s waste utilization and use of c.2 in waste gas. In this artic.e, em.hasis is given on studying the behavior of these pellets in hot m.tal bath during m.lting and refining along with therm.dynam.c. and kinetic. analysis. The observed behaviors of the pellet in hot m.tal bath c.nfirm.that it is suitable and benefic.al for use in BOF and replac.s lum. lim..

关键词： ore pellets lim. dissolution m.lting refining basic.oxygen c.nverters

Prostate Spec.fic.Antigen Sc.eening am.ng m.n in Abakaliki, South East Nigeria

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Open Journal of Urology 2017年第5期7卷 79-85页

作者： E. N. Afogu I. Sunday-Adeoye K. c. ekwedigwe m. E. Isikhuem.n S. c. Okenwa S. A. Popoola m. O. Eliboh I. c. Am.m.lo Urology Unit Department of Surgery Federal Teaching Hospital Abakaliki Nigeria National Obstetric.Fistula c.ntre Abakaliki Nigeria

Bac.ground: Prostate c.nc.r is the m.st c.m.on type of c.nc.r am.ng Nigerian m.n. Prostate spec.fic.antigen (PSA) is produc.d by the prostate gland and it is an im.ortant tum.r m.rker in the sc.eening and diagnosis of prostate c.nc.r bec.use the latter is often assoc.ated with elevated PSA levels. The aim.of this study was to evaluate the profile and PSA levels of m.n presenting for prostate c.nc.r sc.eening at the National Obstetric.Fistula c.ntre, Abakaliki, Nigeria. m.thods: This was a retrospec.ive study of 103 patients who were seen between January 2014 and Dec.m.er 2015 and sc.eened for prostate c.nc.r using PSA assay. Data was extrac.ed from.folders of patients using a proform. and analysed using the Statistic.l Pac.age for Soc.al Sc.enc.s (SPSS), version 21. Result: Out of the 103 c.ients studied, 67 (65%) were between the ages of 40 and 59 years. The m.an age was 54.38 ± 12.5 years. Eighty-one (78.6%) of the study population had PSA levels 4 ng/m. and below, 5 (4.9%) had PSA levels of 4.1 - 10 ng/m., while 17 (16.5%) had PSA levels > 10 ng/m.. The m.an PSA was 4.75 ± 8.2 ng/m.. None of the patients with fam.ly history of c.nc.r had PSA levels of >4 ng/m.. Those who were positive for HIV also had norm.l PSA results. c.nc.usion: The findings from.this study showed that the prevalenc. of m.n with raised PSA (>4 ng/m.) was high (21.4%) espec.ally in the 60 - 69 years age group. There is need to inc.ease prostate c.nc.r sc.eening using PSA in our setting. The use of other param.ters suc. as digital rec.al exam.nation, PSA density, PSA veloc.ty and free PSA will be helpful to determ.ne the need for histologic.l diagnosis in these patients.

关键词： Prostate c.nc.r PSA Sc.eening