Results 321 to 330 of about 441,409 (379)

Beta2‐adrenergic agonist salbutamol exhibits enantioselective disposition in skeletal muscle of lean young men following oral administration

Drug Testing and Analysis, EarlyView.
Oral administration of salbutamol shows enantioselective disposition in human skeletal muscle, favoring the (S)‐enantiomer with higher relative partitioning of the pharmacologically active (R)‐enantiomer in muscle. This is concerning from an anti‐doping point of view because the anabolic properties demonstrated for salbutamol can potentially be ...
Morten Hostrup, Glenn A. Jacobson, Kasper Eibye, Christian K. Narkowicz, David S. Nichols, Søren Jessen   +5 more
wiley   +1 more source

Human phase‐I metabolism of three synthetic cannabinoids bearing a cumyl moiety and a cyclobutyl methyl or norbornyl methyl tail: Cumyl‐CBMEGACLONE, Cumyl‐NBMEGACLONE, and Cumyl‐NBMINACA

Drug Testing and Analysis, EarlyView.
The human phase‐I metabolism of three SCRAs bearing a cumyl moiety and a CBM or NBM tail, based on LC‐qToF‐MS data of authentic urine specimens. Abstract Synthetic cannabinoid receptor agonists (SCRAs) continue to show high prevalence on the new psychoactive substances drug market.
Arianna Giorgetti, Pietro Brunetti, Belal Haschimi, Benedikt Pulver, Jennifer Paola Pascali, Jan Riedel, Volker Auwärter   +6 more
wiley   +1 more source

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Electrospray ionization mass spectrometry of ginsenosides

Journal of Mass Spectrometry, 2002
AbstractGinsenosides Rb1, Rb2, Rc, Rd, Re, Rf, Rg1, Rg2 and F11 were studied systematically by electrospray ionization mass spectrometry in positive‐ and negative‐ion modes with a mobile‐phase additive, ammonium acetate. In general, ion sensitivities for the ginsenosides were greater in the negative‐ion mode, but more structural information on the ...
Chris D. Metcalfe, Raymond E. March, Xiu-Sheng Miao, Chunyan Hao   +3 more
openaire   +3 more sources

Electrospray Ionization Ion Mobility Mass Spectrometry

Critical Reviews in Analytical Chemistry, 2021
Electrospray ionization ion mobility mass spectrometry (ESI-IMS-MS) is a rapidly progressing analytical technique for the examination of complex compounds in the gas phase. ESI-IMS-MS separates isomers, provides structural information, and quantitatively identifies peptides, lipids, carbohydrates, polymers, and metabolites in biological samples.
Katie M. Kohoutek, Peter de B. Harrington   +1 more
openaire   +2 more sources

Electrospray Ionization Mass Spectrometry of Oligonucleotides

Current Protocols in Nucleic Acid Chemistry, 2008
AbstractBecause of the high molecular weights and thermal lability of biomolecules such as nucleic acids and protein, they can be difficult to analyze by mass spectrometry. Such analyses require a “soft” ionization method that is capable of generating intact molecular ions.
Colette M. Castleberry, Patrick A. Limbach, Lenore P. Rodicio   +2 more
openaire   +3 more sources

Electrospray ionization mass spectrometry of metalloporphyrins

Journal of Mass Spectrometry, 1998
The magnesium, nickel, copper, zinc and vanadium metalloporphyrins from octaethylporphyrin, etioporphyrin I and tetraphenylporphyrin were characterized using electrospray ionization mass spectrometry (ESI-MS). The ion abundance of each of the porphyrins present in binary mixtures was monitored as a function of the porphyrin concentration and is ...
Patrick A. Limbach, Victor E. Vandell
openaire   +3 more sources

[21] Electrospray ionization mass spectrometry

1996
Publisher Summary An electrospray ionization source operating at atmospheric pressure was first interfaced to a mass spectrometer in Fenn's laboratory at Yale University (New Haven, CT), with inspiration taken from earlier ion-stopping potential studies, using electrospray ionization conducted by Mack et al .
Banks Jf, Whitehouse Cm
openaire   +3 more sources

Miniaturization of Electrospray Ionization Mass Spectrometry

Applied Spectroscopy Reviews, 2003
1. Abstract The development of electrospray ionization (ESI) has proved an enormous breakthrough in structural biology because it provides a means for transferring large biological molecules into the gas-phase as intact charged ions. In the post-genomics era, increased attention has been focused on mass spectrometry techniques capable of providing ...
Paul M. Bigwarfe, Marie A. Moy, Anthony R. Dolan, Thomas P. White, Troy D. Wood, Daniel J. Higbee, Douglas R. Smith   +6 more
openaire   +2 more sources

Arc-Induced Electrospray Ionization Mass Spectrometry

Analytical Chemistry, 2023
Arc-induced electrospray ionization mass spectrometry (AESI-MS) was developed during which alternating current electrospray is simply achieved through the arc plasma. The AESI source exploits the arc's temperature and charge properties to generate aerosols consisting of charged microdroplets.
Kaineng Huang, Hui Zeng, Xingyue Li, Xiaoting Li, Yuanjiang Pan, Yuanji Gao   +5 more
openaire   +2 more sources

[22] Electrospray ionization mass spectrometry

1990
Publisher Summary This chapter discusses electrospray ionization mass spectrometry. Electrospray ionization (ESI) occurs during the electrostatic nebulization of a solution of charged analyte ions by a large electrostatic field gradient (approximately 3 kV/cm). Highly charged droplets are formed in a dry bath gas, at near atmospheric pressure.
Charles G. Edmonds, Richard D. Smith
openaire   +3 more sources