This paper reports for the first time an experiment designed in which synthesized α cyano ferulic acid used as a new matrix for the analysis of cytochrome c, trypsin, bovine serum albumin, β cyclodextrin, dextrans a...This paper reports for the first time an experiment designed in which synthesized α cyano ferulic acid used as a new matrix for the analysis of cytochrome c, trypsin, bovine serum albumin, β cyclodextrin, dextrans and DNA d(T) 18 . The results demonstrated that α cyano ferulic acid used as a new matrix could effectively desorb and ionize different kinds of samples, such as proteins and peptides, oligosaccharides, polysaccharides and oligonucleotides. In analysis of dextrans the new matrix gave better results when comparing with the normally used DHB. In analysis of DNA d(T) 18 , the sample could be desorbed and ionized more efficiently even without sample purification, which is normally needed when using 3 HPA as a matrix.展开更多
近年来,为了克服基体辅助激光解吸/电离质谱(m atrix-assisted laser desorption/ion ization m ass spectro-m etry,MALD I-MS)测定小相对分子质量物质(sm all relative molecu larm ass compounds,SMC)(<1 500 u)所存在的问题,采...近年来,为了克服基体辅助激光解吸/电离质谱(m atrix-assisted laser desorption/ion ization m ass spectro-m etry,MALD I-MS)测定小相对分子质量物质(sm all relative molecu larm ass compounds,SMC)(<1 500 u)所存在的问题,采取了许多行之有效的方法。这些方法的使用进一步促进了MALD I-MS对SMC的定性、定量分析。本文对这些方法的优缺点及在MALD I-MS分析SMC中的应用进行了综述。展开更多
Matrix-assisted laser desorption/ionization time-of-flight mass spectrometry was used successfully to determine three kinds of bisphthalazinone phenyl ether aromatic polymers with 1,8,9-trihydroxyanthranene as matrix....Matrix-assisted laser desorption/ionization time-of-flight mass spectrometry was used successfully to determine three kinds of bisphthalazinone phenyl ether aromatic polymers with 1,8,9-trihydroxyanthranene as matrix. The polymerization degree of the polymers were determined to be 1 to 17. The influence of deflection value used in MALDI-TOF MS method was discussed.展开更多
The molecular weight of bovine brain CaM, intracellular CaM and extracellularCaM of cauliflower have been determined for the first time by Matrix-Assisted Larer Desorp tion Ionization Time of Flight Mass Spectrometry(...The molecular weight of bovine brain CaM, intracellular CaM and extracellularCaM of cauliflower have been determined for the first time by Matrix-Assisted Larer Desorp tion Ionization Time of Flight Mass Spectrometry(MALDI-TOF-MS). The molecular weightof bovine brain CaM, 16 699. 9 Da determined by MALDI-TOF-MS, is closely ideatical with16 700 Da, calculated from its primary sequence, showing the high accuracy of MALDITOF-MS and the conf1rmation of previously determined sequence. Furthermore, the molecular weight of intracellular CaM and extracellular CaM determined by MAlDI-TOF-MS, 17025 Da and 15 582 Da, are in agreement with 17 500 Da and 15 000 Da determined by SDSPAGE-This agreement shows the high accuracy of MALDI-TOF-MS. In addition, themolecular weight of CaMs with this technique can be determined rapidly(less than 10 min)and sensitively.展开更多
文摘This paper reports for the first time an experiment designed in which synthesized α cyano ferulic acid used as a new matrix for the analysis of cytochrome c, trypsin, bovine serum albumin, β cyclodextrin, dextrans and DNA d(T) 18 . The results demonstrated that α cyano ferulic acid used as a new matrix could effectively desorb and ionize different kinds of samples, such as proteins and peptides, oligosaccharides, polysaccharides and oligonucleotides. In analysis of dextrans the new matrix gave better results when comparing with the normally used DHB. In analysis of DNA d(T) 18 , the sample could be desorbed and ionized more efficiently even without sample purification, which is normally needed when using 3 HPA as a matrix.
文摘近年来,为了克服基体辅助激光解吸/电离质谱(m atrix-assisted laser desorption/ion ization m ass spectro-m etry,MALD I-MS)测定小相对分子质量物质(sm all relative molecu larm ass compounds,SMC)(<1 500 u)所存在的问题,采取了许多行之有效的方法。这些方法的使用进一步促进了MALD I-MS对SMC的定性、定量分析。本文对这些方法的优缺点及在MALD I-MS分析SMC中的应用进行了综述。
文摘Matrix-assisted laser desorption/ionization time-of-flight mass spectrometry was used successfully to determine three kinds of bisphthalazinone phenyl ether aromatic polymers with 1,8,9-trihydroxyanthranene as matrix. The polymerization degree of the polymers were determined to be 1 to 17. The influence of deflection value used in MALDI-TOF MS method was discussed.
文摘The molecular weight of bovine brain CaM, intracellular CaM and extracellularCaM of cauliflower have been determined for the first time by Matrix-Assisted Larer Desorp tion Ionization Time of Flight Mass Spectrometry(MALDI-TOF-MS). The molecular weightof bovine brain CaM, 16 699. 9 Da determined by MALDI-TOF-MS, is closely ideatical with16 700 Da, calculated from its primary sequence, showing the high accuracy of MALDITOF-MS and the conf1rmation of previously determined sequence. Furthermore, the molecular weight of intracellular CaM and extracellular CaM determined by MAlDI-TOF-MS, 17025 Da and 15 582 Da, are in agreement with 17 500 Da and 15 000 Da determined by SDSPAGE-This agreement shows the high accuracy of MALDI-TOF-MS. In addition, themolecular weight of CaMs with this technique can be determined rapidly(less than 10 min)and sensitively.
