Results 211 to 220 of about 195,229 (259)

Electrospray Ionization for Mass Spectrometry of Large Biomolecules

Science, 1989
Electrospray ionization has recently emerged as a powerful technique for producing intact ions in vacuo from large and complex species in solution. To an extent greater than has previously been possible with the more familiar "soft" ionization methods, this technique makes the power and elegance of mass spectrometric analysis applicable to the large ...
J B, Fenn, M, Mann, C K, Meng, S F, Wong, C M, Whitehouse   +4 more
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Electrospray ionization mass spectrometry fingerprinting of propolis

The Analyst, 2004
Crude ethanolic extracts of propolis, a natural resin, have been directly analysed using electrospray ionization mass (ESI-MS) and tandem mass spectrometry (ESI-MS/MS) in the negative ion mode. European, North American and African samples have been analyzed, but emphasis has been given to Brazilian propolis which displays diverse and region-dependent ...
Alexandra C H F, Sawaya, Daniela M, Tomazela, Ildenize B S, Cunha, Vassya S, Bankova, Maria C, Marcucci, Angela R, Custodio, Marcos N, Eberlin   +6 more
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Electrospray ionization mass spectrometry fingerprinting of beer

The Analyst, 2005
After just simple degassing, dilution, pH adjustment and direct flow injection, characteristic fingerprint spectra of beer samples have been obtained by fast (few seconds) electrospray ionization mass spectrometry (ESI-MS) analysis in both the negative and positive ion modes.
Alexssander S, Araújo, Lilian L, da Rocha, Daniela M, Tomazela, Alexandra C H F, Sawaya, Reinaldo R, Almeida, Rodrigo R, Catharino, Marcos N, Eberlin   +6 more
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Ion suppression effect in desorption electrospray ionization and electrospray ionization mass spectrometry

Rapid Communications in Mass Spectrometry, 2017
Rationale Although it is claimed that desorption electrospray ionization (DESI) causes less ion suppression effects than electrospray ionization (ESI), a related investigation with quantification measurement of ion suppression effects is absent.
Zheng Wang, Haijing Zhu, Guangming Huang
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Equilibration for Electrospray Ionization Mass Spectrometry in Quantitative Analysis

Journal of the American Society for Mass Spectrometry, 2022
Electrospray ionization mass spectrometry (ESI-MS) is widely used in drug development, therapeutic drug monitoring, and other fields. However, unstable mass spectral signals, especially during the initial stages of instrument operation, plague analysts.
Fulin Jiang, Zihan Lu, Chang Zhang, Jingyu Liu, Janshon Zhu, Min Huang, Guoping Zhong   +6 more
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Conformational effects in protein electrospray‐ionization mass spectrometry

Mass Spectrometry Reviews, 2015
Electrospray‐ionization mass spectrometry (ESI‐MS) is a key tool of structural biology, complementing the information delivered by conventional biochemical and biophysical methods. Yet, the mechanism behind the conformational effects in protein ESI‐MS is an object of debate.
Li, J, SANTAMBROGIO, CARLO, BROCCA, STEFANIA, Rossetti, G, Carloni, P, GRANDORI, RITA   +5 more
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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 ...
Troy D. Wood, Marie A. Moy, Anthony R. Dolan, Paul M. Bigwarfe, Thomas P. White, Douglas R. Smith, Daniel J. Higbee   +6 more
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Electrode‐assisted desorption electrospray ionization mass spectrometry

Journal of Mass Spectrometry, 2010
AbstractA new ion source has been developed for rapid, noncontact analysis of materials at ambient conditions. The method provides desorption of analytes under ambient conditions directly from different surfaces with little or no sample preparation. The new method, termed electrode‐assisted desorption electrospray ionization (EADESI), is on the basis ...
Özdemir A, Chen CH.
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Monitoring Glycation of Lysozyme by Electrospray Ionization Mass Spectrometry

Journal of Agricultural and Food Chemistry, 2000
Electrospray ionization mass spectrometry (ESI-MS) was used to study the glycation of lysozyme by D-glucose (LZM-G) and by D-fructose (LZM-F) under dry heating conditions in the presence and in the absence of oxygen. ESI-MS proved to be a precise method for monitoring protein glycation with respect to following the extent of glycation and changes in ...
Yeboah, Faustinus K., Alli, Inteaz, Yaylayan, Varoujan A., Konishi, Yasuo, Stefanowicz, Piotr   +4 more
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Analysis of metal species by using electrospray ionization mass spectrometry and capillary electrophoresis–electrospray ionization mass spectrometry

Journal of Chromatography A, 1998
Metal speciation was carried out by on-line hyphenation of capillary electrophoresis (CE) with mass spectrometry (MS) via an electrospray ionization (ESI) interface. The commercially available interface was hardly able to produce stable electrospray conditions over an extended period of time, mainly caused by an insufficient positioning of the CE ...
O. Schramel, B. Michalke, A. Kettrup
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