搜索结果: 1-8 共查到“理学 ESI-MS/MS”相关记录8条 . 查询时间(0.109 秒)
Development of a UPLC-ESI-MS/MS Assay for 20(S)-Protopanaxadiol and Pharmacokinetic Application of Its Two Formulations in Rats
Pharmacokinetic Application Two Formulations Rats
2010/9/14
An ultra-performance liquid chromatography-electrospray tandem mass spectrometry (UPLC-ESI-MS/MS) method was developed to investigate 20(S)-protopanaxadiol (PPD) pharmacokinetics in rats. Rat plasma s...
ESI-MS/MS法鉴别环肽非对映异构体和碎裂机理的研究
ESI mass spectrometry cyclic peptides diastereomer distinguishing diastereomer
2010/3/30
The discrimination of four pairs of cyclic peptide diastereomers were successfully achieved by ESI-MS. The ratio of ions’ abundance ratios between A and B isomers in MS/MS spectra was defined as a par...
The isoflavonoids from Iris tectorum were analyzed by electrospray ionization tandem mass spectrometry(ESI-MS/MS). Based on the information of pseudo molecular ions and daughter ions were obtained by ...
利用片断合成法合成了具有DNA切割能力的六聚吡咯/丝组缀合物, 检测了该化合物的1H、13C NMR 和ESI-MS/ MS 图谱, 确证了该化合物的结构, 通过1H-1H COSY, HSQC，HMBC等2D NMR 技术对其1H 和13C NMR 数据进行了归属和解析, 并探讨了其ESI-MS/ MS 质谱裂解规律.
HPLC-ESI-MS/MS识别蓝莓提取物中的花青素和黄酮醇
花青素 黄酮醇 蓝莓 高效液相色谱-质谱联用 电喷雾离子化/串联质谱
2009/10/15
用高效液相色谱-电喷雾离子化串联质谱联用技术(HPLC-ESI-MS/MS)对蓝莓提取物中的黄酮类物质进行了分析, 可以快速地鉴定其主要成分为花青素和黄酮醇. 结构上的不同导致花青素和黄酮醇在紫外-可见光谱吸收、离子化以及裂解方式上都存在差异. 尽管花青素和黄酮醇在270 nm处都有吸收, 但两者分别在530和372 nm附近有特征吸收. 负离子模式下, 黄酮醇可以生成负离子和自由基负离子, 而正...
ESI-MS MS方法检测拟南芥膜脂分子对机械伤害的响应
机械伤害 脂类分子 脂类组学
2009/5/27
利用一种灵敏的、基于ESI-MSMS ( electrospray ionization tandem mass spectrometry) 的脂类组学方法,测定了机械伤害诱导的拟南芥6 种磷 (phospholipids) 、2 种糖脂(glycolipids) 、3 种溶血磷脂( lysophospholipids)和约120 种脂类分子的变化, 探索了膜脂响应机械伤害的...
小蜡树中苯乙醇苷类化合物的ESI-MS/MS研究
fragmentation behavior phenylethanoid glycosides ESI-MS/MS negative ion mode
2009/4/7
The fragmentation behavior of phenylethanoid glycosides from Fraxinus sieboldiana were investigated
systematically by using ESI-MS/MS in negative ion mode. The fragmentation reaction of these compoun...