Results 321 to 330 of about 544,006 (376)

Fragmentation pathways and structural characterization of organophosphorus compounds related to the Chemical Weapons Convention by electron ionization and electrospray ionization tandem mass spectrometry.

Rapid Communications in Mass Spectrometry, 2016
RATIONALE For unambiguous identification of Chemical Weapons Convention (CWC)-related chemicals in environmental samples, the availability of mass spectra, interpretation skills and rapid microsynthesis of suspected chemicals are essential requirements ...
S. E. Hosseini, H. Saeidian, Ali Amozadeh, M. Naseri, Mehran Babri   +4 more
semanticscholar   +1 more source

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
openaire   +3 more sources

Imaging of Proteins in Tissue Samples Using Nanospray Desorption Electrospray Ionization Mass Spectrometry.

Analytical Chemistry, 2015
Chemical maps of tissue samples provide important information on biological processes therein. Recently, advances in tissue imaging have been achieved using ambient ionization techniques, such as desorption electrospray ionization mass spectrometry (DESI-
Cheng-Chih Hsu, P. Chou, R. Zare
semanticscholar   +1 more source

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.
openaire   +4 more sources

Sample Preparation for Probe Electrospray Ionization Mass Spectrometry

Journal of Visualized Experiments, 2020
Mass spectrometry (MS) is a powerful tool in analytical chemistry because it provides very accurate information about molecules, such as mass-to-charge ratios (m/z), which are useful to deduce molecular weights and structures. While it is essentially a destructive analytical method, recent advancements in the ambient ionization technique have enabled ...
Hiroshi Tanihata, Sen Takeda, Kentaro Yoshimura   +2 more
openaire   +3 more sources

Lipidomics: analysis of the lipid composition of cells and subcellular organelles by electrospray ionization mass spectrometry.

Annual Review of Biochemistry, 2014
Lipidomics aims to quantitatively define lipid classes, including their molecular species, in biological systems. Lipidomics has experienced rapid progress, mainly because of continuous technical advances in instrumentation that are now enabling ...
B. Brügger
semanticscholar   +1 more source

Ion suppression effect in desorption electrospray ionization and electrospray ionization mass spectrometry

Rapid Communications in Mass Spectrometry, 2017
RationaleAlthough 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. Herein, a comparative analysis of ion suppression effects between DESI and ESI was conducted, with the aiming
Zheng Wang, Haijing Zhu, Guangming Huang
openaire   +3 more sources

Electrospray ionization mass spectrometry of some β‐agonists

Rapid Communications in Mass Spectrometry, 1992
AbstractPositive‐ion electrospray spectra of some β‐agonists have been acquired under various ion acceleration conditions. Collisional activation of β‐agonists allows control of their mass spectral patterns, i.e., the molecular ion or several characteristic fragmentations can be favored by changing the energy of the ions extracted into the vacuum ...
Debrauwer, Laurent, Bories, G.
openaire   +3 more sources

Electrospray ionization mass spectrometry of biomolecules

Nature, 1990
The novel ionization technique of electrospray now allows the convenient mass spectrometric analysis of proteins and other biological molecules directly from liquids The molecular weights of protein can be determined to better than 0.01 per cent mass accuracy.
openaire   +2 more sources

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, A. Kettrup, B. Michalke
openaire   +2 more sources