Results 241 to 250 of about 3,438,712 (289)

Determination of micelle mass by electrospray ionization mass spectrometry

Journal of Mass Spectrometry, 2005
AbstractBy electrospray ionization (ESI) mass spectrometry, micelle solutions of sodium cholate were investigated in detail in the presence and absence of ethanol. The average aggregation number could be evaluated from the spectra acquired under conditions where soft collisions adequate to measure the micelle solution were induced, and the value agreed
Daisuke, Nohara, Takatomo, Kajiura, Koji, Takeda   +2 more
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Electrospray ionization tandem mass spectrometry of chaetoglobosins

Rapid Communications in Mass Spectrometry, 2012
RATIONALE Chaetoglobosins are a family of macrocyclic polyketide alkaloids. They possess many similar isomers and exhibit a wide range of biological activities.
Guo-Bo, Xu, Li-Mei, Li, Dong-Mei, Fang, Guo-You, Li, Guo-Lin, Zhang, Zhi-Jun, Wu   +5 more
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Surfactants Usable for Electrospray Ionization Mass Spectrometry

Analytical Biochemistry, 2000
Surfactants suppress the electrospray ionization (ESI) of various compounds. Here we demonstrate that fluorinated surfactants such as perfluorooctanoic acid (PFOA) and perfluorooctanesulfonic acid (PFOSA) could be employed for ESI-MS without a significant decrease in sensitivity.
Y, Ishihama, H, Katayama, N, Asakawa
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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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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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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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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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New developments in biochemical mass spectrometry: electrospray ionization

Analytical Chemistry, 1990
The principles, development, and recent application of electrospray ionization-mass spectrometry (ESI-MS) to biological compounds are reviewed. ESI-MS methods now allow determination of accurate molecular weights for proteins extending to over 50,000, and in some cases well over 100,000.
R D, Smith, J A, Loo, C G, Edmonds, C J, Barinaga, H R, Udseth   +4 more
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