简介:为了探讨连环蛋白P120(P120catenin,P120ctn)在非霍奇金淋巴瘤(NHL)中的表达及意义,采用免疫组织化学染色的方法对比分析了40例NHL和10例反应性增生(RH)淋巴结的外科活检石蜡包埋组织切片中P120ctn的表达情况.结果显示,在反应性增生淋巴结组织中未检测到P120ctn的表达;而在NHL中P120ctn的阳性检出率为55%(22/40),其中低度恶性及中高度恶性NHL组中的阳性检出率分别为16.7%(2/12)、71.4%(20/28),两组之间比较存在显著性差异(P<0.001).另外,在肿瘤血管内皮细胞上也发现了p120ctn的阳性表达.结论:P120ctn的表达与NHL的恶性程度密切相关,提示P120ctn在淋巴瘤的恶性增殖过程中可能发挥着重要作用,这对淋巴瘤的诊断和治疗可能具有一定的意义.
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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.