Results 201 to 210 of about 376,084 (233)
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Journal of Mass Spectrometry, 2011
Branched polyethylenimines (PEIs) with lower average molecular weights (600, 1200 and 1800 Da) have been studied by Electrospray Ionization (ESI) and Matrix‐Assisted Laser Desorption/Ionization (MALDI) mass spectrometry. In both, ESI and MALDI mass spectra, the main distribution arises from protonated PEI oligomers with NH2 end groups, [PEI + H ...
Edgardo, Rivera-Tirado +1 more
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Branched polyethylenimines (PEIs) with lower average molecular weights (600, 1200 and 1800 Da) have been studied by Electrospray Ionization (ESI) and Matrix‐Assisted Laser Desorption/Ionization (MALDI) mass spectrometry. In both, ESI and MALDI mass spectra, the main distribution arises from protonated PEI oligomers with NH2 end groups, [PEI + H ...
Edgardo, Rivera-Tirado +1 more
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Delayed Desorption Improves Protein Analysis by Desorption Electrospray Ionization Mass Spectrometry
Journal of the American Society for Mass Spectrometry, 2020Protein analysis by desorption electrospray ionization mass spectrometry (DESI-MS) is limited and often accompanied by a mass-dependent loss in sensitivity as protein molecular weight increases. Previously, incomplete dissolution was identified as a potential contributing factor to this limitation for larger proteins.
Tara L. Maser +2 more
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Electrospray Laser Desorption Ionization
2019Electrospray laser desorption ionization (ELDI) combines the features of both electrospray ionization and laser desorption. It allows direct, sensitive, and rapid analyses of chemical compounds on the sample surfaces. Chemical and biological compounds dissolved in polar and nonpolar solvents can also be characterized directly by ELDI-mass spectrometry (
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The Analyst, 2010
Electrospray-assisted laser desorption ionization (ELDI) is a technique which combines laser desorption with subsequent electrospray ionization. It is useful for directly detecting small and large molecules in solid or liquid samples under ambient conditions.
Min-Zong, Huang +4 more
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Electrospray-assisted laser desorption ionization (ELDI) is a technique which combines laser desorption with subsequent electrospray ionization. It is useful for directly detecting small and large molecules in solid or liquid samples under ambient conditions.
Min-Zong, Huang +4 more
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European Journal of Mass Spectrometry, 2012
This review reports the results of some studies carried out by us on the role of pneumatic aspects in electrospray and desorption electrospray surface ionization, with the aim of proposing some relevant aspects of the mechanisms involved in these ionization methods.
Seraglia R, Molin L, Isak I, Traldi P
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This review reports the results of some studies carried out by us on the role of pneumatic aspects in electrospray and desorption electrospray surface ionization, with the aim of proposing some relevant aspects of the mechanisms involved in these ionization methods.
Seraglia R, Molin L, Isak I, Traldi P
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Analytical Biochemistry, 2008
Desorption electrospray ionization (DESI) was utilized to monitor the presence of targeted central carbon metabolites within bacterial cell extracts and the quench supernatant of Escherichia coli. The targeted metabolites were identified through tandem mass spectrometry (MS/MS) product ion scans using collision-induced dissociation in the negative ion ...
Ayanna U, Jackson +6 more
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Desorption electrospray ionization (DESI) was utilized to monitor the presence of targeted central carbon metabolites within bacterial cell extracts and the quench supernatant of Escherichia coli. The targeted metabolites were identified through tandem mass spectrometry (MS/MS) product ion scans using collision-induced dissociation in the negative ion ...
Ayanna U, Jackson +6 more
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Electrospray Laser Desorption Ionization Mass Spectrometry
2014Electrospray laser desorption ionization mass spectrometry (ELDI/MS), an ambient mass spectrometric technique that combines laser desorption with postionization via electrospray, was developed to rapidly characterize analytes ranging from small organic to large biomolecules. The technique requires essentially no sample pretreatment.
Min-Zong Huang +5 more
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Analytical Chemistry, 2008
Desorption electrospray ionization (DESI) mass spectrometry is used for the rapid (
Ismael, Cotte-Rodríguez +3 more
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Desorption electrospray ionization (DESI) mass spectrometry is used for the rapid (
Ismael, Cotte-Rodríguez +3 more
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The Analyst, 2010
Mass spectrometry allows rapid chemical analysis of untreated samples in the ambient environment. This is a result of recent rapid progress in ambient ionization techniques. The most widely studied of these new methods, desorption electrospray ionization (DESI), uses fast-moving solvent droplets to extract analytes from surfaces and propel the ...
Demian R, Ifa +3 more
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Mass spectrometry allows rapid chemical analysis of untreated samples in the ambient environment. This is a result of recent rapid progress in ambient ionization techniques. The most widely studied of these new methods, desorption electrospray ionization (DESI), uses fast-moving solvent droplets to extract analytes from surfaces and propel the ...
Demian R, Ifa +3 more
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Ambient molecular imaging by desorption electrospray ionization mass spectrometry
Nature Protocols, 2008Desorption electrospray ionization (DESI) allows the direct analysis of ordinary objects or pre-processed samples under ambient conditions. Among other applications, DESI is used to identify and record spatial distributions of lipids and drug molecules in biological tissue sections.
Justin M, Wiseman +3 more
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