Results 21 to 30 of about 682,349 (297)

Estudo por espectrometria de massas de soluções de hidróxi(tosilóxi)iodobenzeno: propostas para mecanismos de desproporção

Química Nova, 2012
Solutions of [hydroxy(tosyloxy)iodo]benzene (HTIB or Koser's reagent) in acetonitrile were analyzed using high resolution electrospray ionization mass spectrometry (ESI-MS) and electrospray ionization tandem mass spectrometry (ESI-MS/MS) under different ...
Ramon S. Vasconcelos, Luiz F. Silva Jr, Norberto P. Lopes   +2 more
doaj   +1 more source

Comparison of Plasma Ionization- and Secondary Electrospray Ionization- High-resolution Mass Spectrometry for Real-time Breath Analysis

CHIMIA, 2022
Real-time breath analysis by high-resolution mass spectrometry (HRMS) is a promising method to noninvasively retrieve relevant biochemical information.
Jiafa Zeng, Alexandra Christen, Kapil Dev Singh, Urs Frey, Pablo Sinues   +4 more
doaj   +1 more source

An extractive electrospray ionization time-of-flight mass spectrometer (EESI-TOF) for online measurement of atmospheric aerosol particles

Atmospheric Measurement Techniques, 2019
. Real-time, online measurements of atmospheric organic aerosol (OA) composition are an essential tool for determining the emissions sources and physicochemical processes governing aerosol effects on climate and health.
F. Lopez‐Hilfiker, V. Pospisilova, Wei Huang, M. Kalberer, C. Mohr, Giulia Stefenelli, J. Thornton, U. Baltensperger, A. Prévôt, J. Slowik   +9 more
semanticscholar   +1 more source

High-frequency gaseous and particulate chemical characterization using extractive electrospray ionization mass spectrometry (Dual-Phase-EESI-TOF) [PDF]

Atmospheric Measurement Techniques, 2022
To elucidate the sources and chemical reaction pathways of organic vapors and particulate matter in the ambient atmosphere, real-time detection of both the gas and particle phase is needed.
C. P. Lee, M. Surdu, D. M. Bell, J. Dommen, M. Xiao, X. Zhou, A. Baccarini, A. Baccarini, S. Giannoukos, S. Giannoukos, G. Wehrle, P. A. Schneider, A. S. H. Prevot, J. G. Slowik, H. Lamkaddam, D. Wang, U. Baltensperger, I. El Haddad   +17 more
doaj   +1 more source

Electrospray ionization of copper—glycine solutions [PDF]

Journal of the American Society for Mass Spectrometry, 1996
We have characterized the electrospray ionization (ESI) spectra of mixtures of the 3d transition metal ion Cu(2+) with both a model amino acid (glycine) and a simple peptide system (glycylglycine). We found what appear to be two major classes of ions.
Xu, Yaodong, Zhang, Xin, Yergey, Alfred L.   +2 more
openaire   +2 more sources

Nanobubbles in Electrospray Ionization Mass Spectrometry. [PDF]

Anal Chem
Nanobubbles (NBs) are very small gas-filled cavities in solvents, and when their sizes reach diameters around 200 nm, they remain in solution for extended periods of time, featuring special chemical and physical properties. Here, we investigate the application of NBs in electrospray ionization.
Joseph G, Binny B, Venter AR.
europepmc   +3 more sources

Detection of Plasmodium vivax in a child returning from India by use of broad-range PCR and electrospray ionization mass spectrometry

Emerging Microbes and Infections, 2012
Plasmodium vivax is a common cause of imported malaria in the USA, second only to P. falciparum. We present a case of P. vivax malaria in a child returning from India. P.
Megan A Rounds, Christopher D Crowder, Charles W Stratton, David J Ecker, Mark W Eshoo, Yi-Wei Tang   +5 more
doaj   +1 more source

Desorption Electrospray Ionization Mass Spectrometry Imaging of Proteins Directly from Biological Tissue Sections

Analytical Chemistry, 2018
Analysis of large biomolecules including proteins has proven challenging using ambient ionization mass spectrometry imaging techniques. Here, we have successfully optimized desorption electrospray ionization mass spectrometry (DESI-MS) to detect intact ...
Kyana Y. Garza, Clara L. Feider, Dustin R. Klein, Jake Rosenberg, J. Brodbelt, L. Eberlin   +5 more
semanticscholar   +1 more source

A tutorial in small molecule identification via electrospray ionization‐mass spectrometry: The practical art of structural elucidation

Mass spectrometry reviews (Print), 2017
The identification of unknown molecules has been one of the cornerstone applications of mass spectrometry for decades. This tutorial reviews the basics of the interpretation of electrospray ionization‐based MS and MS/MS spectra in order to identify small‐
Thomas de Vijlder, D. Valkenborg, F. Lemière, E. Romijn, K. Laukens, Filip Cuyckens   +5 more
semanticscholar   +1 more source

Fabricating an Electrospray Ionization Chip Based on Induced Polarization and Liquid Splitting

Micromachines, 2021
The coupling of the microfluidic chip to mass spectrometry (MS) has attracted considerable attention in the area of chemical and biological analysis.
Lvhan Zhou, Qian Zhang, Xiangchun Xu, Xinming Huo, Qian Zhou, Xiaohao Wang, Quan Yu   +6 more
doaj   +1 more source