简介:引进分次Armendariz环的概念,讨论了分次环R=n∈ZRn及由它导出的非分次环R,R0,及R[x]之间关于Armendariz环性质的关系,并推广了[8]的结论,得到在R=n∈ZRn是Z-型正分次环的前提下,若R是分次Armendariz,分次正规环,则R是P.P.环(Baer环)当且仅当R是分次P.P.环(分次Baer环).
简介:AsoilpotcultureexperimentwithfoursuppliedPlevels(i.e.P30,P50,P100,P200,representingsupplementalP30,50,100,200mg/kg,respectively)wasconductedtoinvestigateuptakeanduseabilitytoPandZninthericegenotypeswithdifferentP-efficiency,ofwhichricegenotypes508,99011,580,99112werelow-Ptolerantand99056,99012werelow-Psensitive.Low-Ptolerantrice580and99011absorbedmorePthantheothers,andricegenotype580hadstrongeruptakeabilityespeciallyatlow-PlevelsuchasP50andP30.508couldabsorbconsiderableP,andhadthelowestPpercentageofshoot,indicatingithadgoodperformanceinP-useefficiency.ThesethreericegenotypeshadlargerbiomassandlessresponsetochangedPlevelthanricegenotype99112,99056and99012.Ricegenotype99112showedLow-Ptolerancemainlybysacrificingbiomasstomaintainhighrelativegrainyield.TheleastamountofPabsorbedby99056showedithadthelowestPuptakeefficiency,andthehighestPpercentageinshootof99012meantithadthelowestPuseefficiency.Sotheytwoshowedlow-Psensitivity.ZncontentsinshootunderP200,P100andP50weresimilar,butP30increasedZncontentinshootsignificantly.TheZncontentsinshootof99112,99056and99012werehigherthanthoseof508,99011and580,especiallyattilleringstageandbootingstage.AsfortotalZncontentinshoot,Low-Ptolerantricegenotype580hadthelargestamountandfollowedby99011and508,low-Ptolerantricegenotype99012hadthesmallestamountatthethreesamplingstageandfollowedby99056.Furthermore,P/Zninshootof99012wasthehighest,andthatof99056wasthesmallestatthesamePlevel.
简介:摘要目的观察应用中医辨证治疗胃肠疾病的疗效。方法采用半夏泻心汤(法半夏、黄芩、黄连、干姜、党参、炙甘草、大枣)加减治疗胃肠疾病91例。结果有效率90.1%。结论中医药治疗胃肠疾病疗效显著。
简介:Arheo-diecastingprocess(RDC)wasinvestigatedforsemisolidprocessingofanAZ91Dmagnesiumalloy.TheresultsoftheRDCsamplesinas-caststateindicatethatthemicrostructureofprimaryα-Mgparticleshasafinesize,nearlysphericalmorphology,anduniformdistributionthroughoutthecomponents.Duetotheadvancedmicrostructureandreducedlevelofdefects,theRDCAZ91DMgalloyexhibitsanapparentimprovementinmechanicalproperties.Thequantitativemetallographicinvestigationsrevealthatincreasingtheintensityofforcedconvectionduringtheslurrypreparationresultsinapromotednucleationandreducedvolumefractionoftheprimaryphasesolidifiedintheslurrymaker.
简介:摘要目的探讨孕妇早产的原因,加强对早产的认识及寻找正确的处理方法,以降低围生儿死亡率。方法回顾性分析2011年9月~2012年2月来我院分娩的91例早产孕妇临床资料。结果胎膜早破是引起孕妇早产的主要原因,本组引起孕妇早产前5位因素分别为胎膜早破46例(50.5%)、不明原因11例(12.1%)、妊高症7例(7.7%)、多胎妊娠6例(6.6%)、前置胎盘5例(5.5%);不同孕周的早产对母亲的影响无显著差别(P>0.05),不同孕周对新生儿Apgar评分及低体重儿发生率有显著差异(P<0.01)。结论孕妇早产是由多种原因引起的,加强孕期宣教及定期产前检查,积极预防可能引起早产的相关因素,切实加强对高危妊娠的管理,并采取有效的干预措施,可降低孕妇早产的发生率和围产儿的死亡率。