简介:HighlytexturedHeusleralloyMn46Ni42Sn11Sb1ribbonswerepreparedbymeltspinning.TheannealedhighMncontentMn46Ni42Sn11Sb1ribboncross-sectionmicrostructure,crystalstructure,martensitictransformation(MT),andmagnetoresistance(MR)propertieswereinvestigated.TheMRintheannealedribbonwasassessedbythemagneticfielddirectionperpendiculartotheribbonsurfacewiththemagneticfieldupto30kOe.Thelargenegativevalueof25%forMRwasobtainedat244K.Theexchangebias(EB)effectsoftheas-spunandannealedribbonswereinvestigated.Afterannealing,theEBeffectshavebeenimprovedbyabout25Oeatthetemperatureof50K.Themagnetizationshaveincreasedapproximatelyby10%morethantheas-spunribbon.
简介:Theadsorptiveremovalofarsenicbysynthetically-preparednanoFe-Mnbinaryoxides(FM)wasinvestigated.AnovelmethodusingpotassiumpermanganateandferricchlorideasrawmaterialswasusedtosynthesiseFM.ThemolarratioofFeandMninthesyntheticFe-Mnbinaryoxideswas4:3.TheFM-1andFM-2(preparedatdifferentactivationtemperatures)havinghighspecificsurfaceareas(358.87and128.58m2/g,respectively)wereamorphousandofnanoparticletypes.TheamountofarsenicadsorbedonFM-1washigherthanthatadsorbedonFM-2particles.AfteradsorptionbyFM-1,residualarsenicconcentrationdecreasedtolessthan10μg/L.Theadsorptionkineticsdatawereanalyzedusingdifferentkineticmodelsincludingpseudofirst-ordermodel,pseudosecond-ordermodel,Elovichmodelandintraparticlediffusionmodel.Pseudosecond-orderkineticmodelwasthemostappropriatemodeltodescribetheadsorptionkinetics.TheadsorptionpercentageofAs(Ⅲ)increasedinthepHrangeof2–3whileitdecreasedwiththeincreaseofpH(3
简介:Understandingtheeffectsoforganicacids(OA)onthetransformationofFeandMntosurfacewaterfromtheweatheringcoalgangueisofgreatbene?ttoriskassessmentandremediationstrategiesforcontaminatedwaterandsoil.BasedontheinvestigationonsurfacewaterinthecentralcoaldistrictsoftheGuizhouProvince,18watersampleswerecollectedforheavymetalanalysis.TheresultsindicatedthatthepHvalueofsurfacewaterislow(3.11–4.92),andFeconcentration(1.31–5.55mgL-1)andMnconcentration(1.90–5.71mgL-1)were,onaverage,10.86and34.33timesthelimitofSurfaceWaterQualityStandards,respectively.InordertoevaluatetheeffectsoftheOAonthedissolutionofFeandMnfromtheweatheringcoalgangue,columnelutionandbatchleachingexperimentswereconducted.Theresultsshowthatthelowmolecularweightoforganicacids(LMWOAs,i.e.,oxalic,tartaric,malicandcitricacids)andfulvicacidssigni?-cantlyacceleratedthedissolutionofFeandMn;inaddition,whentheconcentrationofOAreached25mmolL-1,theconcentrationsofFe,andMnwere1.14–67.08and1.11–2.32timesashighasthosein0.5mmolL-1OA,respectively.Furthermore,themigrationofFeandMnwassigni?cantlyin?uencedbythepHandEh,especiallyforFe;theionMnwasdissolvedfromtheganguemoreeasilythantheionFeinthecolumnleaching,whichwascontrarytotheresultsofbatchleaching.
简介:摘要目的了解温州地区献血者MN及P血型系统表型和基因频率分布。方法微量板法检测672名献血者红细胞上MN、P血型抗原,根据红细胞凝集与否判定被检者MN及P血型表型。结果MN表型332例,占49.40%,M表型195例,占29.02%,N表型145例,占21.58%,基因频率M为0.5372,N为0.4628;P1型235例,占34.97%,P2型437例,占65.03%,基因频率P1为0.1936,P2为0.8064。结论本地区MN血型的表型分布规律为MN﹥M﹥N,P血型中P2型分布频率明显高于P1型。MN、P血型表型的观察值与期望值差异均无统计学意义(P﹥0.05),观察值均符合Hardy-Weinberg平衡定律。
简介:摘要;本设计采用电感耦合等离子发射光谱法(ICP—OES)对岩石样品中的Cu,Pb,Zn,Mn,Ni进行了测定,样品用四酸()熔矿,不经分离杂质,即可直接测定。该方法选择Cu,Pb,Zn,Mn,Ni的测定分析波长分别为324.7nm,220.3nm,202.5nm,257.6nm,221.6nm分析了用HCl提取与用王水提取,样品首先经磨样机碎至200目,用去离子水湿润后,用四酸熔矿,再将坩埚放置恒温电热板上加热,最后分别用王水或盐酸提取再定容,对其中的Cu,Pb,Zn,Mn,Ni做探究实验。
简介:摘要目的探究急性胆管炎的治疗方法。方法选取我院急性胆管炎患者56例,根据患者的实际情况采用不同的诊疗方式,观察其疾病转归和并发症的发生。结果56例患者中,最终有50例(89.29%)成功治愈,死亡1例,因不能耐受手术而保守治疗无效放弃治疗的5例。在非手术治疗的30例患者中,有14例患者于病情缓解后选择了手术治疗,11例患者经保守治疗症状缓解或消失,治疗效果满意,5例患者保守治疗无效。26例手术治疗的患者中术后无严重并发症而痊愈的有22例,1例死亡,1例术后并发肺部感染,2例出现电解质紊乱和肾功能衰竭。结论对于急性胆管炎的患者应首先根据其病情进行轻重分型,尽早诊断,选择合适的处理方式。对于较严重的急性胆管炎,应尽快减压解除梗阻并引流。
简介:Wereportthestudyofalowtemperatureclusterglassstatein5%Mn-dopedUGa3heavyfermioncompound.Thiscompoundtransformsfromaparamagneticstatetoaspin-clusterglassstate,whichisconfirmedbymeasuringthedcsusceptibilityandmagnetization.Theacsusceptibilityexhibitsafrequency-dependentpeakaroundTf,whichprovidesdirectevidenceoftheclusterglassstate.Byanalyzingthefield-dependentmagnetizationandfrequency-dependentacsusceptibilityindetail,wededucethatthiscompoundformsaspin-clusterglassstatebelowTf.
简介:摘要目的探讨成人支原体肺炎的临床特点、诊断及治疗方案。方法对56例成人支原体肺炎的临床资料进行回顾性分析。结果56例成人支原体肺炎患者中年龄<60岁者39例(69.64%),女性多于男性;临床表现以发热、咳嗽为主,咳嗽主要表现为干咳(46例,82.14%),咯血、胸部阳性体征、合并肺外表现者少见。外周血白细胞计数可表现为正常、降低或升高。β内酰胺类联合喹诺酮类(左氧氟沙星或莫西沙星)组的疗效(热退时间、影像学吸收时间及抗生素使用时间)优于β-内酰胺类联合大环内酯类(阿奇霉素)组。结论支原体肺炎多发于年轻人,表现为干咳为主,可不表现为胸部阳性体征,外周血白细胞计数可表现为正常、降低或升高。β-内酰胺类联合喹诺酮类对成人支原体肺炎的疗效优于β-内酰胺类联合大环内酯类。
简介:目的探讨腹腔镜手术治疗宫外孕的临床疗效,为临床诊治提供参考。方法选择2011年5月至2014年5月实施腹腔镜手术治疗宫外孕患者56例,列为观察组,选取同期60例宫外孕患者列为普通组,实施传统开腹手术治疗,比较两组患者临床指标。结果观察组术中出血量(201.47±21.65)mL、平均手术时间(40.37±12.53)min、下床活动时间(9.16±4.32)h、平均住院时间(4.37±1.43)d、肛门排气时间(11.27±1.46)h,均短于普通组,对比差异有统计学意义(P〈0.05)。结论腹腔镜手术治疗宫外孕创伤小,恢复快,临床效果显著,临床值得推广应用。
简介:ThestrongadaptabilityofBroussonetiapapyrifera(L.)Vent.tolowphosphorus(P)conditionscanbeattributedtothelargeamountofroot-exudedorganicacidsandthehighef?ciencyofPextraction.However,microelementcontentsarein?uencedbylow-Pstress,andtheireffectsonthephotosyntheticcapabilityofB.papyriferaremainunknown.Inthisstudy,weinvestigatedtheeffectsoflow-Ptreatmentonnetphotosyntheticrate(P_N);chlorophylla?uorescence(ChlF)characteristics;andFe,Mn,Cu,andZncontentsofB.papyriferaandMorusalbaL.seedlings.ResultsshowthatB.papyriferaexhibitedbetterphotosyntheticcapabilityundermoderatePde?-ciency(0.125,0.063,and0.031mmol/LPtreatments),whereasthephotosyntheticcapabilityofM.albadecreasedundermoderateandseverePde?ciency(0.016and0mmol/LPtreatments).UndermoderatePde?ciency,thedecreaseinCuandZncontentsinB.papyriferawaslowerthanthatinM.alba.UnderseverePde?ciency,aconsiderabledecreaseofphotosyntheticcapabilityinB.papyriferaandM.albawasassociatedwithlowCuandZncontents.ThePNofthetwoMoraceaespeciesexhibitedabettercorrelationwithCuandZncontentsthanwithFeorMncontent.Pde?ciencycouldnotonlydecreasecyclicphotophorylationandphotosyntheticef?ciency,butcouldalsoaffectthestabilityofthylakoidmembranestructureandelectrontransportef?ciencybyin?uencingthecontentsofCuorZn,therebyaffectingphotosynthesis.
简介:Differentoxygenandnitrogencontainingfunctionalgroupswerecreatedonthesurfaceofthemultiwalledcarbonnanotubes.Themulti-walledcarbonnanotubesweretreatedinultrasonicbathwithsulfuricornitricacid.Furthermorethesurfacetexturewasmodifiedbyincreaseoftheroughness.Inparticularaftertreatmentwiththeoxidizingnitricacid,incomparisontotheH_2SO_4orultra-sonictreatedsamples,cratersandedgesaredominatingthesurfacestructures.Manganeseoxidewasdepositedonthemultiwalledcarbonnanotubesbyprecipitationmechanism.Variousmanganeseoxidesareformedduringthedepositionprocess.Thesampleswerecharacterizedbyelementalanalysis,microscopy,thermalanalysis,Ramanspectroscopy,andbythezetapotentialaswellasX-raydiffractionmeasurements.Itwasshownthatthedepositedmanganeseoxidesarestabilizedratherbysurfacetextureofthemulti-walledcarbonnanotubesthanbycreatedfunctionalgroups.
简介:摘要目的探讨腹腔镜对异位妊娠的诊断及治疗效果。方法回顾性分析2013年2月~2016年2月我院诊治的56例异位妊娠患者的临床资料,其中40例采用腹腔镜行保留输卵管手术,保留输卵管同时均行妊娠黄体剥除。16例切除输卵管手术(包括2例宫角切除)。结果异位妊娠位置分布输卵管壶腹部26例,峡部15例,伞部8例,间质部5例,宫角部2例。本组均顺利完成手术,无中转开腹病例。手术时间62.5~110min,平均为(78.6±18.2)min,术中出血量平均为(41.5±5.1)mL。拆线时间3~7d,术后血HCG恢复正常。随访3个月,超声提示均愈合良好。结论腹腔镜诊治异位妊娠具有确诊率高,疗效肯定,术后出血少,可广泛应用于临床。