气相色谱-质谱法分析乳腺癌大鼠尿液中的代谢物

来源 :分析科学学报 | 被引量 : 0次 | 上传用户:djlmail
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
基于气相色谱-质谱法,建立了乳腺癌大鼠尿液中代谢物的分析方法.构建了乳腺癌大鼠模型.分别收集乳腺癌组、未成瘤组和健康对照组大鼠尿液样本,经脲酶处理后,用甲醇∶乙腈=2∶1(V/V)进行提取,硅烷化试剂N,O-双甲氧基三氟乙酰胺+1%三甲基氯硅烷(BSTFA+ 1% TMCS)衍生,然后采用气相色谱-质谱法分析尿液样本的代谢谱,并用随机森林(RF)算法对实验结果进行分析.结果 表明,三组实验数据被成功分类,并发现甲基丙二酸、3-羟基丁酸、苏糖酸、对羟基苯乙酸、D-麦芽糖等组分在乳腺癌组和健康对照组中具有显著差异.
其他文献
The regulation of memory effect that the residual charges generated during and after discharge act on the initiation and development of subsequent discharge is explored by adjusting the pulse parameters,which have an influence on the discharge characteris
Titanium dioxide (TiO2) nanopowder (P-25;Degussa AG) was treated using dielectric barrier discharge (DBD) in a rotary electrode DBD (RE-DBD) reactor.Its electrical and optical characteristics were investigated during RE-DBD generation.The treated TiO2 nan
以褐铁矿、菱铁矿、赤铁矿和磁铁矿为原料,在600 ℃下氢气焙烧制备零价铁(ZVI).采用X射线衍射仪、X射线荧光光谱仪、比表面积和孔结构分析仪、扫描电镜、X射线光电子能谱、红外光谱表征了富铁矿石矿物组成及制备产物ZVI的形貌、比表面积和孔结构特征,考察了接触时间、初始磷浓度和pH值对磷富集的影响,并分析了pH值为3和5时,富铁矿石中Pb(Ⅱ)、Cu(Ⅱ)、Hg(Ⅱ)的释放情况,探讨了零价铁对磷的富集性能及作用机制.结果 表明,磁铁矿制备的ZVI中铁含量较高(Fe2O387.4%)、杂质较少、拥有大量的微纳
以我国7个不同气候带下的森林土壤为研究对象,从不同温度及降水对森林土壤的影响方面入手,通过野外取样和室内分析相结合的方法,测定其阳离子交换量、土壤颗粒组成、化学组成特征情况,进行选择性溶解分析,并使用X射线衍射分析方法,分析不同森林土壤粘粒矿物XRD物相特征,深入探讨在不同气候带下、受不同温度及降水影响的森林土壤的粘粒矿物的组成特点及含量变化。结果表明,7种供试森林土壤除雾灵山外,其他森林土壤粘粒
To increase the thrust-weight ratio in next-generation military aeroengines,a new integrated afterburner was designed in this study.The integrated structure of a combined strut-cavity-injector was applied to the afterburner.To improve ignition characteris
建立了一种高效液相色谱-串联质谱(LC-MS/MS)同时测定猪肉中氢氯噻嗪、氯噻嗪、氨苯喋啶、丙磺舒、氯噻酮、乙酰唑胺、呋塞米、精磺胺、螺内酯、坎利酮10种利尿剂残留的新方法.样品均质后,加入2 g KH2PO4和10 mL乙腈提取,提取液经分散固相萃取方法净化,高效液相色谱-串联质谱法检测,外标法定量.结果 表明,氢氯噻嗪、氯噻嗪、氨苯喋啶、丙磺舒、氯噻酮在5~100 μg/L范围内呈现良好的线性关系,相关系数均大于0.998,方法检出限为2.00 μg/kg;乙酰唑胺、呋塞米、精磺胺、螺内酯、坎利酮在
Gyrokinetic theory is arguably the most important tool for numerical studies of trarnsport physics in magnetized plasmas.However,exact local energy-momentum conservation laws for the electromagnetic gyrokinetic system have not been found despite continuou
以合成针铁矿为原料,通过煅烧法获得比表面积分别为85.74和22.65 m2/g的多孔纳米赤铁矿和磁赤铁矿,通过静态实验探究了针铁矿和煅烧产物的Sb(Ⅲ)吸附性能.结果 表明,Sb(Ⅲ)吸附效率为赤铁矿>磁赤铁矿>针铁矿,其前二者效率显著高于针铁矿.Sb(Ⅲ)在3种矿物表面的吸附均为快速的化学吸附,吸附在2h内即可接近平衡,符合准二级动力学反应和Freundlich等温吸附模型,为自发进行的吸热反应,升高温度有利于反应的进行.在45 ℃、pH=7的条件下,针铁矿、赤铁矿和磁赤铁矿的最大吸附量分别可达16.
To improve the utilization rate of plasma active species,in this study,a closed non-uniform air gap is formed by a flowing water film electrode and a sawtooth insulating dielectric layer to realize the diffuse glow discharge in the atmosphere.Firstly,the
In agriculture production,plant health is threatened by pathogens parasitic on seeds;hence,it is necessary to disinfect harvested seeds before germination.In this study,a technique of gliding arc plasma treatment was proposed and investigated.The experime