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1.
YBa2 Cu3O7,so called 12 3compound ,isanim portanthighTc oxidesuperconductor[1] .Itscrystalstructureisquasiperovskite (Fig .1)witharegularstackingofBaandYlayersinthec direction .Itisorthorhombic ,belongingtothePmmmspacegroupwithoneformulaunitperprimitivecell .Theyttr… 相似文献
2.
CellcultureofTaxusspp .maybeviewedasapotentialalternativetowholeplantextrac tionasasourceoftheantineoplasticagenttax olandrelatedtaxanes ,currentlyinshortsup ply .Therefore ,howtoincreasetheproductivi tyoftaxolintheplantcellculturehasdrawnmuchattention .Eli… 相似文献
3.
RussellFinex公司开发出一种命名为Vibrasonic 2 0 0 0的超声波振动系统 ,Vibrasonic 2 0 0 0用于安装在普通圆形振动筛上 ,其工作时可产生超声波 ,能有效消除筛网堵塞 ,提高筛粉效率 ,延长筛网寿命 ,尤其是在筛一些难筛的粘或干燥的粉 ,例如粉末涂料、不锈钢粉、铁粉、碳化钨粉等时 ,效果更为显著。在大多数直径 15 0cm以下的普通圆形振动筛上都可安装这种超声波振动系统 ,这种系统产生超声波的时间长短和强度可根据工作需要进行调节 ,操作简便易学。RussellFinex公司的网址是Http :/ /… 相似文献
4.
Effect of La~(3+)on Activities of Antioxidant Enzymes in Wheat Seedlings under Mercury Stress 总被引:2,自引:0,他引:2
Since 1 970s ,REEs (rareearthelements)fertilizerhasbeenextensivelyresearchedonapplicationinagricultureandtheirphysiologi caleffects .Thereweremanyexperimentalda ta .SomeresearchersreportedthatREEscannotonlypromoteplantgrowth ,butalsoen hancethestresstolerance .… 相似文献
5.
Mutilayeredfilmsofstackingalternatelyferromagneticandnonmagneticmaterialshavebeenwidelystudied.Filmsexhibitferromagnetismwhenthethicknessofferromagneticlayersexceedsthecriticalvalue(~2-0nm),andtransformintoparamagneticwhenthethicknessislessthanthecr… 相似文献
6.
Thestacked/ packedbedisgenerallyusedforlargeparticles .Insuchabed ,gas solidreactionisrelativelyslow ,andparticlesshouldbeofgoodme chanicalproperties .So ,itsapplicationislimited .Therainingbedisoperatedwithlessentrainmentofparticles .Therearefewapplicationsi… 相似文献
7.
GdDTPA2-isawellestablishedcontrastagentinclinicaluseformagneticresonanceimagingduetoitshighmolarrelaxometry,highchemicalstabilityandlowtoxicity[1,2].However,itspassiveandnonspecificdistributioninvivolimitsitsutilityinfocallesiondetectionandmoreover… 相似文献
8.
Lanthanumchromite(LaCrO3)isparticularlysuitableforusingasaninterconnecterofsolidoxideelectrolytefuelcell(SOFC)becauseofitspropertiesofthehighelectronicconductivityinthefuelandoxidantatmospheres,thestabilityofoperatinginthefuelcellenvironment,andthe… 相似文献
9.
TransmissionElectronMicroscopyofStacking IrregularitiesinSynchisite-(Ce)YangZhuming(杨主明);ZhangPeishang(张培善);TaoKejie(陶克捷)(Ins... 相似文献
10.
longwiththewidespreadapplicationoftheREEinagriculture ,animalhusbandaryandmedicineofourcountry ,theincreasingconcernwiththeREEcallsforthextensivestudiesontheirmetabolicaccumulationandbi ologicaleffects .ThatsomecellscantakeinREEbymeansofphagocytosisorpi… 相似文献
11.
Forthepasttenyears,thespinelLiMn2O4hasbeenstudiedextensivelyasapositiveelectrodematerialsforrechargeablelithiumandlithiumioncells,becausetheyarecheaper,lesstoxicandmoreeasilypreparedthanothercandidatesLiCoO2andLiNiO2.Unfortunately,itspracticalapplication… 相似文献
12.
Structure and Luminescence Properties of Eu~(3+) Doped SiO_2 Glass Synthesized by Sol-Gel Process 总被引:2,自引:0,他引:2
Amonglanthanideions ,Eu3 + ionposs esesgoodluminescentcharacteristics ,highcolorpurityandhighquantumefficiency .Eu3 + isoneofthecentralionsfirstselectedforthepreparationofrareearthionsdopedlumi nescentmaterials .Dafinovaetal .[1] producedEu3 + andSO2 -4 dopedtungsta… 相似文献
13.
ThephotoacousticeffectwasfirstobservedaboutacenturyagobyBellAG .Itsapplica tionstogaseousanalysishavebeennumerous .Ausefullaboratoryinstrumentsuitablefortheinvestigationofspectralpropertiesofthermallythicksampleswas ,however ,onlydeviseddur ingthe 1 970′s .So… 相似文献
14.
EffectofRareEarthElementsontheInductionFrequencyoftheSomaticCellEmbryoinTheFruitofChineseWolfoerryYangHan-Min(杨汉民);DuLin(杜琳)(... 相似文献
15.
EffectsofSamariumChlorideonPorcineThyroidCellsinVitroZhouLi(周莉);NieYu-Xiu(聂毓秀);ChenYu-Lan(陈玉兰)(BasicMedicalCollegeofNormanBet... 相似文献
16.
《中国稀土学报(英文版)》1999,(2)
Application531LaserperformanceofLDpumpedNd∶Sr5(VO4)3Fcrystal,ShenDeyuanetal.,ActaOpticalSinica,1997,17(1),41.532Organicelect... 相似文献
17.
Intermetallicmolybdenumdisilicide(MoSi2 )isanattractivecandidatematerialforhightemperaturestructuralapplicationsbe causeofitshighmeltingpoint(2 0 3 0℃ ) ,low erdensity ,highthermalconductivityandele vatedoxidationresistanceandcorrosionresis tance .MoSi2 isdimorph… 相似文献
18.
StudyofBi_2O_3-basedRareEarthSolidElectrolyteUsedinFuelCell¥HeLanying;ChenGuangyu;LiuJiang;SuWenhui(DepartmentofPhysics,JilinU... 相似文献
19.
AsakindofHPC (highprotonconduc tor)materials ,POMs (polyoxometalates)havereceivedmuchattentionrecentlyforitshigherprotonconductivitiesatroomtemperatureandloweractivationenergy[1 ,2 ] .However ,thepropertyoflosingwatersatmoderatecondition(about 6 0℃ )limitsitsappl… 相似文献
20.
位于美国宾夕法尼亚州的P/MMarket有限公司建立了一个网上粉末冶金行业电子市场 ,这里设有拍卖场、粉末冶金行业新闻等栏目 ,他们宣称得到了http :/ /www .elcaminc .com、http :/ /www .autocells .com、http :/ /www .unionprocess .com等企业的支持 ,这个网站实行会员制 ,必须有密码才能得到他们的信息服务 ,他们的网址是 :http :/ /www .pmmarket.com粉末冶金行业电子市场@孙世杰 相似文献