目的采用超高效液相色谱-四极杆/静电场轨道阱高分辨质谱(ultra-high performance liquid chromatography-quadrupole/electrostatic field orbitrap high resolution mass spectrometry,UPLC-Q/Orbitrap HRMS)技术建立全血中60种天然...目的采用超高效液相色谱-四极杆/静电场轨道阱高分辨质谱(ultra-high performance liquid chromatography-quadrupole/electrostatic field orbitrap high resolution mass spectrometry,UPLC-Q/Orbitrap HRMS)技术建立全血中60种天然毒素的快速筛查方法。方法分析并记录60种天然毒素标准品的色谱和质谱信息,构建筛查数据库。全血用蛋白沉淀法配合超声辅助分散进行前处理,使用Hypersil GOLD^(TM)C_(18)色谱柱,以5 mmol/L甲酸铵水溶液(含0.1%甲酸)和乙腈为流动相进行梯度洗脱,在电喷雾电离正离子模式和全扫描/数据依赖二级扫描(Full MS/dd-MS^(2))模式下检测。基于构建的筛查数据库,采用TraceFinder软件实现全血中60种天然毒素的快速筛查。结果建立的全血中60种天然毒素的UPLC-Q/Orbitrap HRMS筛查方法,除氧化苦参碱(LOD为20ng/mL)和毒毛旋花子苷元(LOD为40ng/mL)外,其余58种天然毒素的LOD范围为0.05~5 ng/mL。结论该方法前处理简单、高效,可以实现对全血中60种天然毒素的快速筛查。展开更多
利用Vector NTI Advance 11软件分析了NCBI数据库中大菱鲆的12428条EST序列,筛出候选SNP位点;应用高分辨率熔解曲线(HRM)对大菱鲆不同性状群体进行基因分型。结果表明,522个重叠群中共筛出160多个候选SNP位点;设计56对引物用于实验,能...利用Vector NTI Advance 11软件分析了NCBI数据库中大菱鲆的12428条EST序列,筛出候选SNP位点;应用高分辨率熔解曲线(HRM)对大菱鲆不同性状群体进行基因分型。结果表明,522个重叠群中共筛出160多个候选SNP位点;设计56对引物用于实验,能扩增出目的片段的引物有37条,合45个位点,成功率为66.1%;设计探针,能与候选SNP位点杂交的探针有13条,杂交率为28.9%。本实验中能成功进行基因分型的位点共有8个,占杂交位点的61.5%,其中有6个为碱基替换型位点,即G-A和C-T各占3个,2个为碱基颠换型位点,即T-G和A-T各占1个。展开更多
A rapid pretreatment method of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) in soil and analysis by high resolution gas chromatograph-high resolution mass spectrometry was present.The extraction and a...A rapid pretreatment method of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) in soil and analysis by high resolution gas chromatograph-high resolution mass spectrometry was present.The extraction and alumina clean up of PCDD/Fs in soil was achieved by accelerated solvent extractor.Then the multi-layer silica-gel column was used for further clean up.The whole method has been evaluated on certified reference soil and farm soil.Accuracy and precision of this method was tested with satisfactory results.展开更多
文摘利用Vector NTI Advance 11软件分析了NCBI数据库中大菱鲆的12428条EST序列,筛出候选SNP位点;应用高分辨率熔解曲线(HRM)对大菱鲆不同性状群体进行基因分型。结果表明,522个重叠群中共筛出160多个候选SNP位点;设计56对引物用于实验,能扩增出目的片段的引物有37条,合45个位点,成功率为66.1%;设计探针,能与候选SNP位点杂交的探针有13条,杂交率为28.9%。本实验中能成功进行基因分型的位点共有8个,占杂交位点的61.5%,其中有6个为碱基替换型位点,即G-A和C-T各占3个,2个为碱基颠换型位点,即T-G和A-T各占1个。
文摘A rapid pretreatment method of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) in soil and analysis by high resolution gas chromatograph-high resolution mass spectrometry was present.The extraction and alumina clean up of PCDD/Fs in soil was achieved by accelerated solvent extractor.Then the multi-layer silica-gel column was used for further clean up.The whole method has been evaluated on certified reference soil and farm soil.Accuracy and precision of this method was tested with satisfactory results.
