简介:In[1],ShenGuangyuconstructedseveralclassesofnewsimpleLiealgebrasofcharacteristic2,whicharecalledthevariationsofG2.Inthispaper,theauthorsinvestigatetheirderivationalgebras.ItisshownthatG2anditsvariationsallpossessuniquenondegenerateassociativeforms.TheauthorsalsofindsomenonsingularderivationsofViGfori=3,4,5,6,andtherebyconstructsomeleft-symmetricstructuresonViGfori=3,4,5,6.Someerrorsaboutthevariationsofsi(3,F)in[1]arecorrected.
简介:摘要目的应用液质联用(LC-MS/MS)技术,建立农产品中黄曲霉毒素B1、B2、G1、G2的定量检测方法,对市场中的农产品进行分析。方法样品粉碎后经乙腈水(84+16)提取,不经免疫亲和柱净化,氮吹浓缩定容后过0.22μm滤膜。滤液经反向C18柱分离,以0.1%甲酸水-甲醇作流动相梯度洗脱分离4种黄曲霉毒素。质谱采用电喷雾离子化源(ESI),正离子模式扫描。结果4种毒素在各自的定量范围内均呈良好的线性关系,r>0.990,回收率>80%,且与经免疫亲和柱净化相比,具有较高的回收率。结论该方法具有简便、快速、经济、灵敏、准确等优点,适用于多种农产品中黄曲霉毒素的检测。
简介:Glioblastoma(GBM)isoneofthedeadliesttumorsandhasamediansurvivalof3monthsifleftuntreated.Despiteadvancesinrationallytargetedpharmacologicalapproaches,theclinicalcareofGBMremainspalliativeinintent.Sincethemajorityofalteredsignalingcascadesinvolvedincancerestablishmentandprogressioneventuallyaffectcellcycleprogression,analternativeapproachforcancertherapyistodevelopinnovativecompoundsthatblocktheactivityofcrucialmoleculesneededbytumorcellstocompletecelldivision.Inthiscontext,wereviewpromisingongoingandfuturestrategiesforGBMtherapeuticsaimedtowardsG2/Minhibitionsuchasanti-microtubuleagentsandtargetedtherapyagainstG2/Mregulatorslikecyclin-dependentkinases,Aurorainhibitors,PLK1,BUB,1,andBUBR1,andsurvivin.Moreover,wealsoincludeinvestigationalagentsinthepreclinicalandearlyclinicalsettings.Althoughseveraldrugswereshowntobegliotoxic,mostofthemhavenotyetenteredtherapeutictrials.TheuseofeithersingleexposureoracombinationwithnovelcompoundsmayleadtotreatmentalternativesforGBMpatientsinthenearfuture.
简介:ItisknownthatthereexistsanisogenysortofChevalleygroupsG(∑,F)associatedtoanyindecomposablerootsystem∑andanyfieldF.InthispapertheauthordeterminesallnontfivialhomomorphismsfromG(∑,k)toG(∑,K)whentherootsystem∑isoftypeCnorG2,andthefieldskandKarefinitefieldsofcharacteristiep.
简介:摘要目的对多重实时定量PCR(real-time quantitative PCR,qPCR)进行反应体系筛选和方法探索,使其用于G1—G4型轮状病毒VP7基因的快速分型和定量分析。方法设计G1—G4型轮状病毒VP7基因特异性引物和探针,以特异性体外转录RNA为模板,筛选多重qPCR反应体系,建立多重qPCR方法。采用单因素方差分析和配对样本t检验对多重与单重qPCR检测结果进行比较。结果经筛选,得到6组三重qPCR反应体系和1组四重qPCR反应体系。所建立的三重和四重qPCR中,除四重qPCR的G1型参数〔标准曲线决定系数(R2)为0.982、扩增效率为89.221%〕略低于要求外,其余标准曲线R2均>0.99,扩增效率均在90%至110%之间;检测灵敏度达102拷贝/μl。多重与单重qPCR检测同一样本的相关性较好(R2>0.95)。三重与单重qPCR(t值为1.420~25.786)、四重与单重qPCR(t值为2.505~4.851)检测结果间的差异均无统计学意义(P值均>0.05)。结论建立的多重qPCR可同时对3种以上目的基因进行分型和定量检测,为未来多价轮状病毒疫苗及混合病毒样本中毒株的快速分型和定量检测方法的建立提供了借鉴。