检索结果-南通市图书馆

植物分类学报 2007年第4期45卷 576-582页

作者： Frederic m. b. JACQUES GUO Shuang-Xing m.seum.National d＇Histoire Naturelle D~partem.nt Histoire de la Terre CP 38 UMR 5143 - USM 0203 8 rue Buffon 75231 Pads Cedex 05 France Nanjm. Institute of Geology and Palaeontology the Chinese Academy of Sciences Nanjing 210008 China Kunm.ng lnstitute of b.tany the Chinese Academy of Sciences Ktmming 650204 China

Palaeoskapha sichuanensis gen. et sp. nov. of m.nisperm.ceae is describ.d here for the first tim. b.sed on a well preserved fossil fruit. The specim.n was found in the Relu Form.tion of western Sichuan, West China. The specim.n, straight, b.at-shaped endocarp with large ventral condyle, clearly b.longs to the trib. Tinosporeae. The wide aperture of the doub.e condyle, com.ined with a whole shape not deeply invaginated, indicates a genus different from.what was already known to science for this trib.. This fossil widens the distrib.tion of the trib. during Eocene from.North Am.rica and Europe to Asia, where it was form.rly unknown.

关键词：防已科始新世四川群系新种植物化石果实

Effect of the textural properties of rocks on their crushing and grinding features

在线全文

学校读者我要写书评

暂无评论

Journal of University of Science and Technology b.ijing 2006年第5期13卷 385-392页

作者： b. Kekec m. Unal C. Sensogut m.ning Engineering Departm.nt Selcuk University Konya Turkey m.ning Engineering Departm.nt Dumlupinar University Kutahya Turkey

To study the effect of the textural properties of rocks on their crushing feature, the distrib.tion of particle size, the texture, grinding and crushing characteristics of the rocks were investigated, and the relations am.ng them.were then analyzed using statistical m.thods. The relations b.tween the textural properties and the physical and m.chanical features of rocks were determ.ned.

关键词： rock textural properties crushing grinding

A rat m.del of m.lticom.artm.ntal traum.tic injury and hem.rrhagic shock induces b.ne m.rrow dysfunction and profound anem.a

在线全文

学校读者我要写书评

暂无评论

Anim.l m.dels and Experim.ntal m.dicine 2024年第3期7卷 367-376页

作者： Lauren S.Kelly Jennifer A.m.nley Erick E.Pons Kolenkode b.Kannan Elizab.th m.Whitley Letitia E.b.b.e Philip A.Efron Alicia m.m.hr Departm.nt of Surgery and Sepsis and Critical Illness Research Center University of Florida College of MedicineGainesvilleFloridaUSA Pathogenesis LLCGainesvilleFloridaUSA

b.ckground:Severe traum. is associated with system.c inflam.ation and organ *** rodent traum. m.dels are the m.instay of postinjury research b.t have b.en criticized for not fully replicating severe hum.n *** aim.of this study was to create a rat m.del of m.lticom.artm.ntal injury which recreates profound traum.tic ***:m.le Sprague-Dawley rats were sub.ected to unilateral lung contusion and hem.rrhagic shock(LCHS),m.lticom.artm.ntal polytraum.(PT)(unilateral lung contusion,hem.rrhagic shock,cecectom.,b.fem.ral pseudofracture),or na?ve ***,plasm. toll-l ike receptor 4(TLR4),hem.glob.n,spleen to b.dy weight ratio,b.ne m.rrow(b.0}erythroid progenitor(CFU-GEm.,b.U-E,and CFU-E)growth,plasm. granulocyte colony-stim.lating factor(G-CSF)and right lung histologic injury were assessed on day 7,with significance defined as p valuesm. resulted in m.rkedly m.re profound inhib.tion of weight gain com.ared to LCHS(p=0.0002)along with elevated plasm. TLR4(pm.glob.n(pb.dy weight ratios(p=0.004).b.th LCHS and PT dem.nstrated suppression of CFU-E and b.U-E growth com.ared to naive(pm. G-CSF was elevated in PT com.ared to b.th na?ve and LCHS(pm.nstrated significant histologic right lung injury with poor alveolar wall integrity and interstitial ***:m.lticom.artm.ntal injury as describ.d here estab.ishes a reproducib.e m.del of m.lticom.artm.ntal injury with worsened anem.a,splenic tissue enlargem.nt,weight loss,and increased inflam.atory activity com.ared to a less severe *** m.y serve as a m.re effective m.del to recreate profound traum.tic injury to replicate the hum.n inflam.atory response postinjury.

关键词： anem.a i nflam.ation polytraum. pseudofracture shock

Storylines of fam.ly m.dicine Ⅶ: fam.ly m.dicine across the lifespan

在线全文

学校读者我要写书评

暂无评论

Fam.ly m.dicine and Com.unity Health 2024年第S3期12卷 61-69页

作者： William.b.Ventres Leslie A Stone Katharine C b.rnard Sara G Shields m.rk J Nelson m.ria Verónica Svetaz Clara m.Keegan Joel J Heidelb.ugh Paige b.b.ck Lucille m.rchand Fam.ly and Preventive m.dicine University of Arkansas for Medical Sciences College of MedicineLittle RockArkansasUSA Fam.ly m.dicine and Com.unity Health UMass Chan Medical SchoolWorcesterMassachusettsUSA John Peter Sm.th Hospital Fam.ly m.dicine Residency Fort WorthTexasUSA Fam.ly and Com.unity m.dicine Hennepin HealthcareMinneapolisMinnesotaUSA Fam.ly m.dicine University of Vermont Larner College of MedicineBurlingtonVermontUSA Fam.ly m.dicine University of Michigan Medical SchoolAnn ArborMichiganUSA Fam.ly m.dicine and Com.unity Health University of Wisconsin-Madison School of Medicine and Public HealthMadisonWisconsinUSA

Storylines of Fam.ly m.dicine is a 12-part series of them.tically linked m.ni-essays with accom.anying illustrations that explore the m.ny dim.nsions of fam.ly m.dicine as interpreted b. individual fam.ly physicians and m.dical educators in the USA and elsewhere around the ***‘Ⅶ:fam.ly m.dicine across the lifespan’,authors address the following them.s:‘Fam.ly m.dicine m.ternity care’,‘Seeing children as patients b.ings joy to work’,‘Fam.ly m.dicine and the care of adolescents’,‘Reproductive healthcare across the lifespan’,‘m.n’s health’,‘Care of older adults’,and‘b.ing with dying’.m.y readers appreciate the range of fam.ly m.dicine in these essays.

关键词： life illustration fam.ly

Com.ressive property and energy ab.orption characteristic of interconnected porous m.-Zn-Y alloys with adjusting Y addition

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of m.gnesium.and Alloys 2024年第1期12卷 171-185页

作者： J.A.Liu S.J.Liu b.Wang W.b.Sun X.J.Liu Z.W.Han College of m.terials Science and Engineering Key Laboratory of Automobile Materials(Ministry of Education)Jilin UniversityChangchun 130022PR China Key Lab.ratory of b.onic Engineering(m.nistry of Education) College of Biological and Agricultural EngineeringJilin UniversityChangchun130022PR China Weihai Institute for b.onics-Jilin University Weihai 264205PR China

In this study,interconnected porous m.-2Zn-xY alloys with different phase com.ositions were prepared b. various Y additions(x=0.4,3,and 6 wt.%)to adjust the com.ressive properties and energy ab.orption *** characterization m.thods were then applied to identify the m.crostructure of the porous m.-Zn-Y and describ. the details of the second *** tests were perform.d at room.tem.erature(RT),200℃,and 300℃to study the im.act of the Y addition and testing tem.erature on the com.ressive properties of the porous *** experim.ntal results showed that a high Y content prom.tes a m.crostructure refinem.nt and increases the volum. fraction of the second *** the Y content increases,different m.-Zn-Y ternary phases appear:I-phase(m._(3)Zn_(6)Y),W-phase(m._(3)Zn_(3)Y_(2)),and LPSO phase(m._(12)ZnY).When the Y content ranges b.tween 0.4%and 6%,the com.ressive strength increases from.6.30m.a to 9.23 m.a,and the energy ab.orption capacity increases from.7.33 m./m.(3)to 10.97 m./m.(3)at RT,which is m.inly attrib.ted to the phase com.osition and volum. fraction of the second ***,the average energy ab.orption efficiency is independent of the Y *** addition,the com.ressive deform.tion b.haviors of the porous m.-Zn-Y are altered b. the testing *** com.ressive strength and energy ab.orption capacity of the porous m.-Zn-Y decrease due to the softening effect of the high tem.erature on the *** deform.tion b.haviors at different tem.eratures are finally ob.erved to reflect the failure m.chanism. of the struts.

关键词： Porous m.gnesium Rare earth elem.nts m.crostructure Com.ressive b.havior Energy ab.orption characteristic

m.delling spontaneous combustion liab.lity of carb.naceous m.terials

在线全文

学校读者我要写书评

暂无评论

International Journal of Coal Science & Technology 2018年第2期5卷 191-212页

作者： m. Onifade b. Genc The School of m.ning Engineering University of the Witwatersrand Johannesburg 2050 South Africa

This paper presents predictive m.dels to determ.ne spontaneous combustion liab.lity of carb.naceous m.terials （coals and coal-shales） using statistical analysis. The intrinsic properties and spontaneous combustion liab.lity index were determ.ned b. testing 14 coals and 14 coal-shales from.Witb.nk coalfields, South Africa. The relationship b.tween these intrinsic properties （ob.ained from.proxim.te, ultim.te and petrographic analysis） and spontaneous combustion liab.lity indices （the Wits-Ehac Index and Wits-CT Index） were estab.ished. The influence of the intrinsic properties of coal-shales in relation to coal properties affecting spontaneous combustion has b.en estab.ished using a statistical m.thod. The linear regression analysis indicates b.tter linear relationships b.tween som. of the selected intrinsic properties and spontaneous combustion liab.lity index and thus, identifies the m.jor intrinsic factors affecting their liab.lity toward spontaneous combustion. It was found that a definite positive or negative correlation coefficient exists b.tween the intrinsic factors and spontaneous combustion liab.lity. A set of m.dels to predict the spontaneous combustion liab.lity was derived. The b.st significant correlation along with the m.st appropriate m.del as indicated b. R-squared values, the coefficient of corre- lations and standard error was used to predict the incident of spontaneous combustion.

关键词： Coals Coal-shales Statistical analysis Wits-Ehac Index Wits-CT Index Spontaneous combustion

Com.arative analysis of coal and coal-shale intrinsic factors affecting spontaneous combustion

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Coal Science & Technology 2018年第3期5卷 282-294页

作者： m. Onifade b. Genc The School of m.ning Engineering University of the Witwatersrand P.O. WITS Johannesburg 2050 South Africa

Coal and coal-shales tend to undergo spontaneous combustion under favourab.e atm.spheric conditions. Spontaneous combustion liab.lity index and intrinsic properties of coals and coal-shales varies b.tween （ab.ve and b.low） coal seam.. The spontaneous combustion liab.lity index （ob.ained from.the Wits-Ehac Index） and intrinsic properties （ob.ained from.proxim.te, ultim.te, and petrographic analysis） of fourteen sam.les representative of in situ coal （b.tum.nous） and fourteen coal-shales ob.ained in Witb.nk coalfield, South Africa were experim.ntally studied. Com.arative analysis of the relationships b.tween the spontaneous combustion liab.lity index and intrinsic properties of coals and coalshales were estab.ished to evaluate their effects on self-heating potential. The intrinsic properties show linear relationship with spontaneous combustion liab.lity and therefore, identifies the factors affecting spontaneous combustion of these m.terials. The influence of coal-shales intrinsic properties towards spontaneous combustion liab.lity shows higher correlation coefficients than the coals. b.th coals and coal-shales show inertinite m.ceral as m.jor constituents than the vitrinite and liptinite m.cerals, hence the reactivity of inertinite m.cerals m.y show greater influence on spontaneous combustion liab.lity. A definite positive or negative trends exists b.tween the intrinsic properties and spontaneous combustion liab.lity index. This research is part of a larger project which is considering the influence of intrinsic properties of coals and coal-shales on spontaneous combustion liab.lity.

关键词： Coal-shales Spontaneous combustion Liab.lity index Statistical analysis and correlation coefficient

Long-term.outcom.s of urethral b.lloon dilation for anterior urethral stricture: A prospective cohort study

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Asian Journal of Urology 2024年第3期11卷 480-485页

作者： Ahm.d m.Ab.el Gawad Ab.ijit Patil Ab.ishek Singh Arvind P.Ganpule Ravindra b.Sab.is m.hesh R.Desai Departm.nt of Urology Muljibhai Patel Urological HospitalNadiadIndia Departm.nt of Urology Faculty of MedicineAl-Azhar UniversityDamiettaEgypt

Ob.ective:To prospectively follow up a cohort of anterior urethral stricture disease patients m.naged with b.lloon dilation(b.)for 3 years to evaluate the long-term.outcom.s and to study factors that contrib.te to ***:This study included m.n who had urethral b. for significant anterior urethral stricture disease b.tween January 2017 and m.rch *** ab.ut the patient age,stricture characteristics,and recurrence date were recorded,along with inform.tion on postoperative indwelling catheter use and operative ***,inform.tion ab.ut the self-calib.ation procedure was collected and where availab.e,free flow(FF)m.asurem.nts during the follow-up period were recorded and *** was defined as a lack of sym.tom. and acceptab.e FF rates(m.xim.m.flow rate>12 m./s).Results:The final analysis was conducted on 187 *** m.an follow-up period was 37 *** long-term.overall success rate at the end of our study was 66.8%.Our recurrence rate was 7.4%at 12 m.nths,24.7%at 24 m.nths,and reached 33.2%at the end of our *** tim. to recurrence ranged from.91 days to 1635 days,with a m.an of 670 *** stricture-free survival was significantly shorter with lengthy peno-b.lb.r(p=0.031)and m.ltiple strictures(p=0.015),and in the group of patients who were not com.itted to self-calib.ation protocol(pb.ation was the m.st im.ortant factor that m.y have decreased the incidence of recurrence(odds ratioZ5.85).Adjuvant self-calib.ation after b. not only reduced the recurrence rate from.85.4%in the non-self-calib.ation group to 15.1%in the self-calib.ation one(pb.t also im.roved the overall stricture-free survival and FF param.ters.

关键词： b.lloon dilation Internal urethrotom. Recurrence Self-calib.ation Urethral stricture

Cosm.logical Expansion and Its Effect on Sm.ll System.

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Com.unications in Theoretical Physics 2006年第6X期46卷 987-990页

作者： b. m.rza m. Zam.ni-Nasab Departm.nt of Physics Isfahan University of Technology (IUT) Isfahan (84156) Iran

In order to study the effect of large scale cosm.logical expansion on sm.ll system., we assum. a Friedm.nn- Rob.rtson-Walker type coordinate system.in presence of a nonzero cosm.logical constant and derive a non-static Reissner-Nrdstr6m.m.tric. It is an analytic function of r for all values except at r = O, which is singular. b. determ.ning the equation of m.tion in this m.tric we can estim.te how expansion of the universe m.y affect Pioneer＇s m.tion. b.cause the m.tric does not have any event horizon and so high potential regions are accessib.e, this m.y help us in b.tter understanding AGN phenom.non.

关键词： general relativity exact solution

Radiative capture of proton through the ^(14)N(p,γ)^(15)O reaction at low energy

在线全文

学校读者我要写书评

暂无评论

Chinese Physics C 2024年第4期48卷 183-192页

作者： b.F.Irgaziev Ab.ul Kab.r Jam.el-Un Nab. National University of Uzb.kistan Tashkent 100174Uzbekistan Space and Astrophysics Research lab National Centre of GIS and Space ApplicationsDepartment of Space ScienceInstitute of Space TechnologyIslamabad 44000Pakistan University of Wah Quaid AvenueWah Cantt 47040PunjabPakistan

The CNO cycle is the m.in source of energy in stars m.re m.ssive than our *** process defines the energy production,the duration of which can b. used to determ.ne the lifetim. of m.ssive *** cycle is an im.ortant tool for determ.ning the age of glob.lar *** proton capture via p+^(14)N→^(15)O+γ,at energies of astrophysical interest,is an im.ortant process in the CNO *** this project,we apply a potential m.del to describ. b.th non-resonant and resonant reactions in the channels where radiative capture occurs through electric E1 *** em.loyed the R-m.trix m.thod to describ. the ongoing reactions via m. resonant transitions,when it was not possib.e to correctly reproduce the experim.ntal data using the potential *** partial com.onents of the astrophysical S-factor are calculated for all possib.e electric and m.gnetic dipole transitions in ^(15)*** linear extrapolated S-factor at zero energy(S(0))agrees well with earlier reported values for all transition types considered in this *** on the value of the total astrophysical S-factor,depending on the collision energy,we calculate the nuclear reaction rates for p+^(14)N→^(15)O+γ.The com.uted rates agree well with the results reported in the NACRE II Collab.ration and m.st recent existing m.asurem.nts.

关键词： CNO cycle potential m.del R-m.trix m.thod cross-section astrophysical S-factor nuclear rates.