scholarly journals FT-ICR-MS Characterization of Intermediates in the Biosynthesis of the α-Methylbutyrate Side Chain of Lovastatin by the 277 kDa Polyketide Synthase LovF

Biochemistry ◽  
2011 ◽  
Vol 50 (2) ◽  
pp. 287-299 ◽  
Author(s):  
Michael J. Meehan ◽  
Xinkai Xie ◽  
Xiling Zhao ◽  
Wei Xu ◽  
Yi Tang ◽  
...  
Keyword(s):  
Polyketide Synthase ◽  
Side Chain ◽  
Ft Icr Ms ◽  
Ft Icr

Molecular characterization of size-segregated organic aerosols in the urban boundary layer in wintertime Beijing by FT-ICR MS

2021 ◽  
Author(s):  
Qiaorong Xie ◽  
Sihui Su ◽  
Shuang Chen ◽  
Qiang Zhang ◽  
Siyao Yue ◽  
...  
Keyword(s):  
Boundary Layer ◽  
Size Distribution ◽  
Molecular Characterization ◽  
Organic Aerosols ◽  
Urban Boundary Layer ◽  
Vertical Profiles ◽  
Unique Information ◽  
Ft Icr Ms ◽  
Ft Icr

Our study provides unique information on the vertical profiles and size distribution of urban organic aerosols by FT-ICR MS.

scholarly journals Characterization of Heavy Oil by FT-ICR MS Coupled with Various Ionization Techniques

2009 ◽  
Vol 52 (4) ◽  
pp. 159-171 ◽  
Author(s):  
Keiko Miyabayashi ◽  
Yasuhide Naito ◽  
Mikio Miyake
Keyword(s):  
Heavy Oil ◽  
Ft Icr Ms ◽  
Ft Icr

scholarly journals Molecular characterization of aldehydes and ketones in particle phase of mainstream and sidestream cigarette smoke

2019 ◽  
Vol 6 (2) ◽  
pp. 181832
Author(s):  
Xiu Chen ◽  
Quan Shi ◽  
Xibin Zhou ◽  
Xuezheng Liu
Keyword(s):  
Mass Spectrometry ◽  
Cigarette Smoke ◽  
Gas Chromatography Mass Spectrometry ◽  
Ion Cyclotron Resonance ◽  
Particle Phase ◽  
Orbitrap Mass Spectrometry ◽  
Aldehydes And Ketones ◽  
Ft Icr Ms ◽  
Ft Icr

Aldehydes and ketones (AKs) in cigarette smoke are risk to humans and environment. Due to the complexity of itself and the interference of the smoke tar matrix, the aldehydes and ketones in particle phase (AKPs) of mainstream smoke (MSS) and sidestream smoke (SSS) have not been well investigated. In this study, the AKPs of MSS and SSS were derivatized into polar products by reaction with Girard T reagent. The derivatives were isolated rapidly by column chromatography and analysed by Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS). Fifteen species of aldehydes and ketones were detected by positive ion electrospray ionization (ESI) FT-ICR MS: O 1–6 , N 1 O 1–4 , N 2 O 1–3 and N 3 O 2–3 . The total number of AKPs obtained by ESI FT-ICR MS in MSS and SSS is about 1100 and 970, respectively. After hydrolysis, the original AKPs were obtained and 63 carbonyls were identified and quantified by gas chromatography–mass spectrometry (GCMS). The nitrogen-containing and high-oxygen AKPs were further characterized by Orbitrap mass spectrometry. Structures of compounds with high relative abundance in the mass spectrum were speculated (e.g. a series of degradants of cembrenediol) by comparison with the results of GCMS.

Characterization of petroleum acids using combined FT-IR, FT-ICR–MS and GC–MS: Implications for the origin of high acidity oils in the Muglad Basin, Sudan

2010 ◽  
Vol 41 (9) ◽  
pp. 959-965 ◽  
Author(s):  
Maowen Li ◽  
Dingsheng Cheng ◽  
Xiaohua Pan ◽  
Lirong Dou ◽  
Dujie Hou ◽  
...  
Keyword(s):  
High Acidity ◽  
Ft Ir ◽  
Ft Icr Ms ◽  
Ft Icr

Emerging Technologies for Identification of Disinfection Byproducts:  GC/FT−ICR MS Characterization of Solvent Artifacts

2007 ◽  
Vol 41 (15) ◽  
pp. 5419-5425 ◽  
Author(s):  
Caleb Heffner ◽  
Indira Silwal ◽  
John M. Peckenham ◽  
Touradj Solouki
Keyword(s):  
Emerging Technologies ◽  
Disinfection Byproducts ◽  
Ft Icr Ms ◽  
Ft Icr

scholarly journals Characterization of Vanadium and Sulfur Containing Compounds of Kazakhstan Petroleum Vacuum Residuum

2021 ◽  
Author(s):  
Yerdos Ongarbayev ◽  
Shynar Oteuli ◽  
Yerbol Tileuberdi ◽  
Yahe Zhang ◽  
Fang Zheng ◽  
...  
Keyword(s):  
Cyclotron Resonance ◽  
Bulk Property ◽  
Ion Cyclotron Resonance ◽  
Molecular Weights ◽  
Ft Icr Ms ◽  
Positive Ion ◽  
Sulfur Containing ◽  
Sulfur Containing Compounds ◽  
Ft Icr

In the paper, bulk property and chemical composition of Kazakhstan vacuum residuum were characterized. Sulfides and thiophenes were selectively isolated from the residuum and characterized by Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS). Molecular weights of the sulfur compounds were varied from 150 to 800 Da and S1 , S2 , O1S1 , O2S1 , N1S1 class species were assigned in the heavy oil derived methylsulfonium. Vanadyl porphyrins characterized by positive-ion electrospray ionization and FT-ICR MS, which showed that etioporphyrins (ETIO) (CnH2n-28N4V1O1 , corresponding to DBE = 17) and deoxophylloerythroetioporphyrins (DPEP) (CnH2n-30N4V1O1, corresponding to DBE = 18). It should be noted that the vanadyl porphyrins were most abundant.

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