为建立一种基于微滴式数字PCR(droplet digital PCR,dd PCR)的高特异性、高灵敏度,且可绝对定量检测流产衣原体(Chlamydia abortus,C.abortus)的方法,针对流产衣原体ompA基因设计特异性引物和探针,建立并优化ddPCR反应条件,并对该方法...为建立一种基于微滴式数字PCR(droplet digital PCR,dd PCR)的高特异性、高灵敏度,且可绝对定量检测流产衣原体(Chlamydia abortus,C.abortus)的方法,针对流产衣原体ompA基因设计特异性引物和探针,建立并优化ddPCR反应条件,并对该方法的特异性、灵敏度以及重复性进行评估。结果显示,所建立ddPCR方法的最低检测限为1.76 copies/μL,灵敏度高;与贝氏柯克斯体、牛分枝杆菌、动物布鲁氏菌、李氏杆菌、金黄色葡萄球菌、鹦鹉热衣原体均无交叉反应,特异性强;组内和组间重复试验变异系数均小于10%,重复性好。用建立的ddPCR方法检测20份疑似感染临床样品,发现其检出率高于荧光PCR方法。结果表明,本研究建立的ddPCR方法特异性强、灵敏度高、重复性好,为流产衣原体感染的快速诊断和精准防控提供了有效手段,具有广泛的应用前景。展开更多
A zinc sulfate open framework matrix,[Zn(SO_4)(DMSO)](1),was synthesized by solvothermal evaporationusing dimethyl sulfoxide(DMSO)as the solvent.A compositeP@1,which exhibits fluorescence and room tempera-ture phospho...A zinc sulfate open framework matrix,[Zn(SO_4)(DMSO)](1),was synthesized by solvothermal evaporationusing dimethyl sulfoxide(DMSO)as the solvent.A compositeP@1,which exhibits fluorescence and room tempera-ture phosphorescence(RTP)properties,was prepared by doping 2,6-naphthalic acid(P)into matrix1at a low con-centration.P@1emitted a green RTP that was visible to the naked eye and lasted for approximately 2 s.P@1exhib-ited selective phosphorescence enhancement response towards Pb^(2+),with a detection limit of 2.52μmol·L^(-1).Themain detection mechanism is the Pb—O coordination-induced phosphorescence enhancement in the system.Inter-estingly,P@1also functioned as a dual-channel probe for the rapid detection of Fe^(3+)ions through fluorescencequenching with a detection limit of 0.038μmol·L^(-1).The recognition mechanism may be attributed to the competi-tive energy absorption betweenP@1and Fe^(3+)ions.CCDC:2388502,1.展开更多
文摘A zinc sulfate open framework matrix,[Zn(SO_4)(DMSO)](1),was synthesized by solvothermal evaporationusing dimethyl sulfoxide(DMSO)as the solvent.A compositeP@1,which exhibits fluorescence and room tempera-ture phosphorescence(RTP)properties,was prepared by doping 2,6-naphthalic acid(P)into matrix1at a low con-centration.P@1emitted a green RTP that was visible to the naked eye and lasted for approximately 2 s.P@1exhib-ited selective phosphorescence enhancement response towards Pb^(2+),with a detection limit of 2.52μmol·L^(-1).Themain detection mechanism is the Pb—O coordination-induced phosphorescence enhancement in the system.Inter-estingly,P@1also functioned as a dual-channel probe for the rapid detection of Fe^(3+)ions through fluorescencequenching with a detection limit of 0.038μmol·L^(-1).The recognition mechanism may be attributed to the competi-tive energy absorption betweenP@1and Fe^(3+)ions.CCDC:2388502,1.
