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Showing 1 to 20 of 170 for “"MASS SPECTRA"”.
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Algorithms for Peptide Identification from Mixture Tandem Mass Spectra
The large amount of data collected in an mass spectrometry experiment requires effective computational approaches for the automated analysis of those data. Though extensive research has been conducted for such purpose by the proteomics community, there are still remaining challenges, among which, …
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Peak intensity prediction in mass spectra using machine learning methods
Massenspektrometrie ist heutzutage unersetzlich, um Proteine und Peptide in komplexen biologischen Proben schnell zu untersuchen. Das Hauptproblem bei der quantitativen Analyse mit Methoden der Massenspektrometrie ist dabei die Tatsache, dass die Empfindlichkeit von Massenspektrometern …
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Milk protein adulteration detection via mass spectra and infrared spectroscopy
… (2-DE), liquid chromatography tandem mass spectrometry, and infrared spectroscopy to detect foreign protein spiked in milk, especially hydrolyzed plant proteins. Here are the major results: (1) According to the protein spots highlighted on the polyacrylamide gel of adulterated milk, …
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Machine Learning Methods for Discovering Metabolite Structures from Mass Spectra
… cancer biology, and various other processes. Mass spectrometry is often used as an analytical technique to investigate the small molecules present in a sample, measuring both their masses and fragmentation spectra. However, the complexity and high dimensionality of spectral data makes it …
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Advance metabolite identification from tandem mass spectra using deep generative models
Tandem mass spectrometry (MS/MS) is a modern technique for measuring metabolites. MS/MS spectra represent molecules by the fragment patterns of compounds that contain structural features of the precursor molecules. The database-searching strategy is the most popular for metabolite identification …
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Analysis of SELDI mass spectra for biomarker discovery and cancer classification
… laser desorption/ionisation time-of-flight mass spectrometry (SELDI-TOF MS) for biomarker discovery and cancer classification. It investigated quantitative measures of reproducibility and found that SELDI protein profiles are affected by sample storage and processing procedure. Two new peak …
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Determination of High Mass, Low Intensity and Transient Mass Spectra by Computer
… high molecular weight for field desorption (FD) mass spectrometry earlier led to the proposal of hexakis(multifluoroalkoxy)cyclotriphosphazenes as standards. The phosphazenes tend to give only molecular ions in the FI/FD mode. Their peaks' negative mass defects rarely interfere with sample peaks …
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The mass spectra and correlations with structure for some 1-(5-ethyl-2-thienyl)-1-thiaalkanes
The mass spectra of fifteen members of the 1-(5-ethyl-2-thienyl)-1-thiaalkanes have been obtained. Fragmentation paths, rearrangement mechanisms supported by low ionization voltage data have been discussed. The parent peaks are moderately strong. The rearrangement ion at m/e 144 is prominent for …
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The structural significance of doubly charged ions found in the mass spectra of some organic molecules.
Massachusetts Institute of Technology. Dept. of Chemistry. Thesis. 1965. Ph.D.
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Studies on the Chemical Synthesis and Mass Spectra of Higher Branched Chain Saturated, Unsaturated, and Dicarboxylic Acids
Made available in DSpace on 2015-05-12T21:43:24Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 7013273.PDF: 6240394 bytes, checksum: eead811ffbc9e605556fcb27e57a78fa (MD5) Previous issue date: 1969
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SEARCH FOR ELECTROWEAK PRODUCTION OF SUPERSYMMETRIC PARTICLES IN COMPRESSED MASS SPECTRA WITH THE ATLAS DETECTOR AT THE LHC
… Queste ricerche sono effettuate in spettri di massa compressi, dove la differenza di massa tra la particella subito più pesante di quella più leggera e quella più leggera è relativamente piccola. Queste ricerche usano dati provenienti dalle collisioni protoni-protoni raccolti con un'energia …
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Increased confidence of metabolite identification in high-resolution mass spectra using prior biological and chemical knowledge-based approaches
Mass spectrometry-based metabolomics aims to study endogenous, low molecular weight metabolites and can be used to examine a variety of biological systems. To substantially increase the accuracy of metabolite identification and increase coverage of the metabolome detected by high-resolution (HR) …
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The Development of the ATLAS SCT as a Luminometer and the Search for SUSY Decays with Compressed Mass Spectra
… particles at increasingly high center-of-mass energies and luminosities, the LHC at CERN being the latest to continue this legacy. This thesis covers both the enhancement of luminosity measurements of pp collisions at ATLAS, underpinning the accuracy of all measurements made by the …
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Weighted two-band target entropy minimization for the reconstruction of pure component mass spectra: Simulation studies and the application to real system
… suitable for reconstructing discrete pure spectra (such as MS) from mixture systems was developed. It used 1) Peaksa?? Height instead of their derivatives in objective function. 2) Weighting VT vectors to lower the effect of noise on systems. 3) A two-peak targeting method to deal with …
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Mass-Spectra of the Neutral F-Meson and Neutral A2-Meson in the Reactions(-)pion-Proton Goes to (neutron,(+)pion,(-)pion and (-)pion-Proton Goes to (neutron,rho-Meson,pion) at 4.5 Gev/c
Made available in DSpace on 2015-05-12T22:38:53Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 7317268.PDF: 2596660 bytes, checksum: 4e6796aadb69a0214347cad6dfdf93af (MD5) Previous issue date: 1972
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Mass Spectra of the f-Zero and A2-Zero Mesons in the Reactions Pi-Minus Proton Goes to Neutron Pi-Plus Pi-Minus and Pi-Minus Proton Goes to Neutron Rho Pi at 4.5 GeV/C
Submitted by Jesse Garrison (jagarris@illinois.edu) on 2012-01-10T20:17:01Z No. of bitstreams: 1 1972_jordan.pdf: 2876320 bytes, checksum: ead736ab74c5a4d9de6a69fe3d44d6bc (MD5)
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Understanding the chemistry of atmospheric particles using single particle mass spectrometry
… thesis explores ways in which single particle mass spectrometry can be extended, whether through hardware improvements, or through the use of advanced data processing techniques to provide new kinds of aerosol chemistry measurements. Most of this work has been carried out using the Particle …
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Part One: Stereoselective Effects in Reactions of Cobalt Complexes Containing the Asymmetric Ligand, Phenylethylenediamine. Part Two: The Mass-Spectra of N,n'-Bis(salicylidene)phenyl-Ethylenediamine and Its Coordination Complexes With Cobalt(ii), Nickel(ii) and Copper(ii)
Made available in DSpace on 2014-12-10T23:01:31Z (GMT). No. of bitstreams: 1 7317253.pdf: 9300150 bytes, checksum: 9c1d736096e4dc5e99772bfac3c7fbf2 (MD5) Previous issue date: 1972
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Thermal degradation of organophosphorus compounds.
… infrared, 1H nuclear magnetic resonance spectra and mass spectra of 1,3,5-triazine and phosphorus compounds of relevance to the topic is briefly discussed. The behaviour of heated samples of menazon on paper (one and two dimensional) and thin layer (analytical and preparative) …
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Signal variation in single particle aerosol mass spectrometry
… One approach to such detection, bioaerosol mass spectrometry (BAMS), is currently under development at Lawrence Livermore National Laboratory. BAMS is a type of single particle aerosol mass spectrometry that rapidly records dual-polarity mass spectra of aerosolized micro-particles. However, …
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