Electrospray ionization mass spectral characteristics and fragmentation mechanisms of novel photoinduced DNA-cleaving agents formed as conjugates of haloarenes and polyamides containingN-methylimidazole

2004 ◽  
Vol 18 (22) ◽  
pp. 2770-2772 ◽  
Author(s):  
Dan Liu ◽  
Jiang Zhou ◽  
Gu Yuan
Keyword(s):  
Electrospray Ionization ◽  
Spectral Characteristics ◽  
Ionization Mass ◽  
Mass Spectral ◽  
Dna Cleaving ◽  
Fragmentation Mechanisms

Electrospray Ionization Mass Spectral Characteristics and Fragmentation Mechanisms of Tanshinones in Radix Salvia miltiorrhiza

2013 ◽  
Vol 781-784 ◽  
pp. 1027-1031
Author(s):  
Tao Liu ◽  
Gui Feng Zhang ◽  
Hui Yin ◽  
Xiao Bao Jin ◽  
Jia Yong Zhu
Keyword(s):  
Electrospray Ionization ◽  
High Performance ◽  
Collision Energy ◽  
Salvia Miltiorrhiza ◽  
Spectral Characteristics ◽  
Tanshinone Iia ◽  
Pharmacokinetic Analysis ◽  
Ionization Mass ◽  
Mass Spectral ◽  
Radix Salvia Miltiorrhiza

Cryptotanshinone, tanshinone I, and tanshinone IIA were analyzed by High-performance liquid chromatography /electrospray ionization-mass spectrometry. MSn spectra were obtained and optimized by energy collision induced dissociation (CID) from [M+H]+ ions, the effect of collision energy on production of fragmental ions were studied and optimal signals were achieved. With the collision energy of 35%, tanshinones have optimal signals of fragmental ions and maximal amounts of product fragment ions respectively. The fragmentation pathways for the compounds were studied, and this information would be helpful for the quantitative and pharmacokinetic analysis of tanshinones.

Electrospray Ionization Mass Spectral Characteristics of Polyamide Containing 1,4,7,10-Tetraazacyclododecane

2006 ◽  
Vol 24 (7) ◽  
pp. 923-928 ◽  
Author(s):  
Ren-Zhong Qiao ◽  
Zhen Zhang ◽  
Yong Ju ◽  
Chuan-Qin Xia ◽  
Xiao-Qi Yu ◽  
...  
Keyword(s):  
Electrospray Ionization ◽  
Spectral Characteristics ◽  
Ionization Mass ◽  
Mass Spectral

scholarly journals Mass Spectrometric Characterization of Epoxidized Vegetable Oils

Polymers ◽  
2019 ◽  
Vol 11 (3) ◽  
pp. 394
Author(s):  
Ákos Kuki ◽  
Tibor Nagy ◽  
Mahir Hashimov ◽  
Stella File ◽  
Miklós Nagy ◽  
...  
Keyword(s):  
Raw Materials ◽  
Ionization Mass ◽  
Mass Spectral Peak ◽  
Mass Spectral ◽  
Natural Systems ◽  
Data Mining Approach ◽  
Novel Approach ◽  
Fragmentation Mechanisms ◽  
Fatty Acid Compositions

Matrix-assisted laser desorption ionization and electrospray ionization mass spectrometry (MALDI-MS and ESI-MS) were used for the characterization of epoxidized soybean and linseed oils, which are important raw materials in the biopolymer production. The recently invented data mining approach, mass-remainder analysis (MARA), was implemented for the analysis of these types of complex natural systems. Different epoxidized triglyceride mass spectral peak series were identified, and the number of carbon atoms and epoxide groups was determined. The fragmentation mechanisms of the epoxidized triglyceride (ETG) adducts formed with different cations (such as H+, Na+, Li+, and NH4+) were explored. As a novel approach, the evaluation of the clear fragmentation pathways of the sodiated ETG adducts enabled the estimation of the epoxidized fatty acid compositions of these types of oils by MS/MS.

Electrospray Ionization Mass Spectral Characterization of Transient Iron Species of Bioinorganic Relevance

1996 ◽  
Vol 35 (8) ◽  
pp. 2369-2372 ◽  
Author(s):  
Jinheung Kim ◽  
Yanhong Dong ◽  
Edmund Larka ◽  
Lawrence Que
Keyword(s):  
Electrospray Ionization ◽  
Spectral Characterization ◽  
Ionization Mass ◽  
Iron Species ◽  
Mass Spectral
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