Results 261 to 270 of about 18,266,081 (302)

Mass Spectrometry and High Resolution Mass Spectrometry: An Overview

2017
In this chapter, a brief overview of fundamentals in mass spectrometry and some applications are presented. The main concepts in ionization techniques, classical techniques and ambient mass spectrometry are followed by an overview on analyzers.
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High-resolution laser mass spectrometry

International Journal of Mass Spectrometry and Ion Processes, 1984
Abstract Multi-photon absorption within the small focus of an intense pulsed laser beam leads to an efficient ionization of the absorbing molecules. The point-like ionization region and the peculiar multi-photon excitation mechanism make for an ideal ion source for a mass spectrometer.
H.J. Neusser, U. Boesl, R. Weinkauf, E.W. Schlag   +3 more
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High resolution mass spectrometry of trimethylamine

Organic Mass Spectrometry, 1970
AbstractHigh resolution shows that the four principal fragment peaks of trimethylamine are singlets. Close studies of the metastable transitions in the spectrum have established the origin of almost all fragment peaks.
Georg Hvistendahl, Kjell Undheim
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Choosing between high-resolution mass spectrometry and mass spectrometry/mass spectrometry environmental applications

Environmental Science & Technology, 1990
Selectivity in environmental analyses requires the use of fractionation techniques and HRMS or MS/MS to eliminate specific and nonspecific interferences. In the analysis of TCDDs and TCDFs, HRMS is the method of choice when specific interferences arising from compounds with molecular or fragment ions can be separated from TCDD and TCDF ions at a ...
M. Judith Charles, Yves Tondeur
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Proteotyping of the Parainfluenza Virus with High-Resolution Mass Spectrometry

Analytical Chemistry, 2013
Parainfluenza viruses (PIVs) are one of the most common causes of respiratory tract infections in children and can be life-threatening when the airway becomes obstructed. Infection results in a spectrum of respiratory disease symptoms that makes diagnosis difficult.
An P, Nguyen, Kevin M, Downard
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Yeast Expression Proteomics by High-Resolution Mass Spectrometry

2010
Comprehensive analysis of yeast as a model system requires to reliably determine its composition. Systematic approaches to globally determine the abundance of RNAs have existed for more than a decade and measurements of mRNAs are widely used as proxies for detecting changes in protein abundance.
Walther, Tobias C, Olsen, Jesper Velgaard, Mann, Matthias   +2 more
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Tissue Analysis with High-Resolution Imaging Mass Spectrometry

2009
Molecular mass spectrometric images of tissue sections facilitate precise location of biomolecules, drugs, their metabolites and the biomolecular aberrations they target. Technological developments are rapidly expanding the capabilities of imaging mass spectrometers.
Altelaar, A.F.M., Heeren, R.M.A.
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High-resolution mass spectrometry for thymosins detection and characterization

Expert Opinion on Biological Therapy, 2015
The aim of this study was to characterize β and α thymosins and their proteoforms in various tissues and bodily fluids by mass spectrometry and to look at their association with a wide variety of pathologies.A top-down proteomic platform based on high-performance liquid chromatography (HPLC) coupled to high-resolution LTQ-Orbitrap mass spectrometry (MS)
CABRAS, TIZIANA, Iavarone, Federica, Martelli, Claudia, Delfino, Daniela, Rossetti, Diana Valeria, Inserra, Ilaria, MANCONI, BARBARA, Desiderio, Claudia, MESSANA, IRENE, Hannappel, Ewald, FAA, GAVINO, Castagnola, Massimo   +11 more
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Signal Detection in High-Resolution Mass Spectrometry Data

Journal of Proteome Research, 2008
Mass spectrometry data from high-resolution time-of-flight instruments often contain a vast number of noninformative background-ion peaks whose signal is similar to that of peptide peaks. Consequently, seeking peptide signal in these spectra based on a signal-to-noise ratio will remove signal peaks as well as noise.
Dale F, McLerran, Ziding, Feng, O John, Semmes, Lisa, Cazares, Timothy W, Randolph   +4 more
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The role of direct high-resolution mass spectrometry in foodomics

Analytical and Bioanalytical Chemistry, 2015
Foodomics has been defined as a global discipline in which advanced analytical techniques and bioinformatics are combined to address different questions in food science and nutrition. There is a growing number of works on the development and application of non-targeted omics methods in foodomics, which reflects that this emerging discipline is already ...
Ibáñez, Clara, Simó, Carolina, García-Cañas, Virginia, Santos Acunha, Tanize dos, Cifuentes, Alejandro   +4 more
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