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848 Newest Publications in rapid communications in mass spectrometry
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Transmission mode direct analysis in real time mass spectrometry for fast untargeted metabolic fingerprinting
07-05-2013 | Christina M. Jones, Facundo M. Fernández, Rapid Communications in Mass Spectrometry, 2013
RATIONALE Untargeted metabolic fingerprinting is a discovery tool to better understand biochemical processes involved in detecting and characterizing disease states and responses to environmental stressors. Although current mass spectrometric (MS) methods are very powerful, there is a ...
Octacoordinate metal carbonyls of scandium and yttrium: theoretical calculations and experimental observation
07-05-2013 | Xiaopeng Xing, Jie Wang, Hua Xie, Zhiling Liu, Zhengbo Qin, Lijuan Zhao, Zichao Tang, Rapid Communications in Mass Spectrometry, 2013
RATIONALE The transition metal carbonyls are among the most important complexes in coordination chemistry. The maximum coordination number in these complexes is seven. Because the cations Sc+ and Y+ have empty second outermost d orbital subshells, they can possibly bond eight CO ligands, ...
Comparative metabolism and stability of andrographolide in liver microsomes from humans, dogs and rats using ultra‐performance liquid chromatography coupled with triple‐quadrupole and Fourier transform ion cyclotron resonance mass spectrometry
07-05-2013 | Hai‐Yu Zhao, Hao Hu, Yi‐Tao Wang, Rapid Communications in Mass Spectrometry, 2013
RATIONALE Andrographolide (AP) is a major active anti‐inflammatory compound extracted from Andrographis paniculata Nees. The metabolism stability of AP is one of the key factors for its further development as a new drug candidate. In order to clarify the biotransformation of AP among ...
Comparison of high‐performance liquid chromatography/tandem mass spectrometry and high‐performance liquid chromatography/photo‐diode array detection for the quantitation of carotenoids, retinyl esters, α‐tocopherol and phylloquinone in chylomicron‐rich fractions of human plasma
07-05-2013 | Rachel E. Kopec, Ralf M. Schweiggert, Ken M. Riedl, Reinhold Carle, Steven J. Schwartz, Rapid Communications in Mass Spectrometry, 2013
RATIONALE Bioavailability of essential lipophilic micronutrients and carotenoids is of utmost interest for human health, as the consumption of these compounds may help alleviate major nutritional deficiencies, cardiovascular disease, and cancer. High‐performance liquid ...
Online methodology for determining compound‐specific hydrogen stable isotope ratios of trichloroethene and 1,2‐cis‐dichloroethene by continuous‐flow isotope ratio mass spectrometry
07-05-2013 | Orfan Shouakar‐Stash, Robert J. Drimmie, Rapid Communications in Mass Spectrometry, 2013
RATIONALE Carbon and chlorine compound‐specific isotope analysis (CSIA) is utilized in chlorinated solvent contamination studies of soil and groundwater contaminated sites. However, in field studies, hydrogen CSIA has been used only in non‐chlorinated volatile organic compound (VOC) ...
Continuous‐flow liquid microjunction surface sampling probe connected on‐line with high‐performance liquid chromatography/mass spectrometry for spatially resolved analysis of small molecules and proteins
07-05-2013 | Gary J. Van Berkel, Vilmos Kertesz, Rapid Communications in Mass Spectrometry, 2013
RATIONALE A continuous‐flow liquid microjunction surface sampling probe extracts soluble material from surfaces for direct ionization and detection by mass spectrometry. Demonstrated here is the on‐line coupling of such a probe with high‐performance liquid chromatography/mass spectrometry ...
The use of a xylosylated plant glycoprotein as an internal standard accounting for N‐linked glycan cleavage and sample preparation variability
07-05-2013 | S. Hunter Walker, Amber D. Taylor, David C. Muddiman, Rapid Communications in Mass Spectrometry, 2013
RATIONALE Traditionally, free oligosaccharide internal standards are used to account for variability in glycan relative quantification experiments by mass spectrometry. However, a more suitable internal standard would be a glycoprotein, which could also control for enzymatic cleavage ...
Measurement of apo(a) kinetics in human subjects using a microfluidic device with tandem mass spectrometry
07-05-2013 | Haihong Zhou, Jose Castro‐Perez, Michael E. Lassman, Tiffany Thomas, Wenyu Li, Theresa McLaughlin, Xie Dan, Patricia ..., Rapid Communications in Mass Spectrometry, 2013
RATIONALE Apolipoprotein(a) [apo(a)] is the defining protein component of lipoprotein(a) [Lp(a)], an independent risk factor for cardiovascular disease. The regulation of Lp(a) levels in blood is poorly understood in part due to technical challenges in measuring Lp(a) kinetics. ...
Metabolite profiling using liquid chromatography/quadrupole time‐of‐flight mass spectrometry for the identification of a suitable marker and target matrix of griseofulvin use in bovines
07-05-2013 | J. A. Tarbin, R. J. Fussell, Rapid Communications in Mass Spectrometry, 2013
RATIONALE Griseofulvin is an antifungal agent with potential for misuse in food‐producing animals. Little is known about its metabolism in ruminants and hence what are suitable marker residues and target matrices for monitoring purposes. METHODS Tissues harvested from cattle ...
Structural elucidation of a new sildenafil analogue using high‐resolution Orbitrap mass spectrometry
07-05-2013 | Chee‐Leong Kee, Xiaowei Ge, Min‐Yong Low, Hwee‐Ling Koh, Rapid Communications in Mass Spectrometry, 2013
RATIONALE One new phosphodiesterase type 5 (PDE‐V) inhibitor, propoxyphenyl homohydroxysildenafil (PP‐HHS), has been isolated from one health supplement, and analyzed using high‐resolution Orbitrap mass spectrometry. High‐resolution mass spectrometry (HRMS) is useful to elucidate unknown ...
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