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Showing 1 to 20 of 32 for “"Mass Analysis"”.
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Air mass analysis : a graphical means of identifying air masses
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Meteorology, 1930.
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Mass Analysis and Raw Material Sourcing as Metrics of Poverty Point's Socio-Political Organization
… to the site’s construction and continued use. Mass analysis and raw material sourcing of the North Three excavation units offer an enhanced examination of the lithic activities of the Poverty Point site. These analyses provide new insight into how the site may have been utilized by those …
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Searching Through Debris: A Mass Analysis From The Carter Robinson Mound Site In Lee County, Virginia
… understand the people living at this site a mass analysis was conducted to examine the lithic debris left behind by the people living there. The purpose of this thesis is to identify the degree of tool production at Carter Robinson and to identify areas of tool production, in order to better …
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Laser Electrospray Mass Spectrometry: Mechanistic Insights and Classification of Inorganic-Based Explosives and Tissue Phenotypes Using Multivariate Statistics
… and electrospray ionization for capture and mass analysis of the gas phase ions. The internal energy deposition from nonresonant vaporization with femtosecond laser pulses was measured using dried and liquid samples of p-substituted benzylpyridinium ions and peptides. In the comparison of the …
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Novel methods for manipulating ion types in the solution and gas phases for the structural analysis of biomolecules using Mass Spectrometry
<p>Mass Spectrometry has become a valuable tool for the analysis of a variety of molecules, making it applicable to many fields. The advent of nanoelectrospray ionization (nESI) as a soft/low energy ionization technique has enabled the analysis of large, intact biomolecules. Most mass spectrometry …
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Molecular characterization of the lipidome by mass spectrometry
… methodology for automated and quantitative analysis of molecular lipid species based on mass spectrometry. From this work a novel high-throughput methodology for lipidome analysis emerged. The main assets of the methodology were the structure-specific mass analysis by powerful hybrid mass …
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Furanic Molecules: Multiplexed Synchrotron Photoionization Investigations and Aerosol Studies
… carried out using synchrotron photoionization mass spectrometry (SPIMS) with an orthogonal time-of-flight spectrometer used for mass analysis at the Advanced Light Source of Lawrence Berkeley National Laboratory. CBS-QB3 calculated adiabatic ionization energies (AIE) agree well with the …
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An investigation of the response of a 1/5-scale model of the Titan III launch vehicle to longitudinal excitation
… response; one represents a simple lumped-mass analysis and the other a more refined interpretation which considers axisymmetric shell, fluid, and mass components of the structure. Longitudinal vibration mode shapes and frequencies computed from the component model show better correlation …
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Fundamental Investigations of the Quadrupole Ion Storage trap Operating in Novel Modes
… on very similar principles to the Quadrupole Mass Filter, but has not been developed to the same extent. <br/><br/>This thesis presents a novel approach to the construction, operation and use of a Quistor as a mass spectrometer. It is felt that the method used offers significant advantages …
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Modelling and performance evaluation of coupled micro resonator array for artificial nose
… readout. The CMRA working principle is based on mass loading frequency response effect; the frequency response of the coupled resonators is a signature for the multiple sensors. The key research outputs are balanced effective mass of the coupled resonators for measurable response and broke the …
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Electrospray ionization mass spectrometry for the analysis of proteins and small molecules
In this document methods for the analysis of proteins and small molecules by Electrospray Ionization Mass Spectrometry (ESI-MS) are discussed. Section I contains an introduction to ESI-MS, including a brief history of mass spectrometry, a discussion of the current theories developed to explain the …
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Mass spectrometric investigation of the OH induced oxidation of isoprene using 0 2 + as a chemical ionization reagent
… NOx concentrations. An ion-trap time of flight mass spectrometer was used for analysis. It consisted of a source chamber and a flight tube. Main portion of the source chamber contained a quadrupole ion-trap where chemical ionization and ion storage took place. 02 + ions were used as chemical …
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The crystal chemistry of titanite
… rare earths substitute for Ca. Ion microprobe mass analysis indicate that Pb, U, and Th are present in all but two specimens examined, both of which are from pegmatites. Trace level concentrations of elements not previously reported in natural titanites including Ru, Pd, Ag, and Te were …
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An Improved Method for the Fracture Cleavage Testing of Adhesively-Bonded Wood
… application of an established and powerful data analysis using a corrected compliance method from beam theory. Three studies were conducted using various wood adhesives and DCB specimens were fabricated from yellowpoplar (Liriodendron tulipifera) sapwood. The sensitivity of this methodology …
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Development of a quadrupole ion trap / time-of-flight mass spectrometer for mass resolution and ion photophysics
Development of a tandem mass spectrometer, consisting of a quadrupole ion trap (QIT) and a time-of-flight, is described for ion mass resolution and photophysics. Ions are generated externally by electrospray ionization and trapped in the quadrupole ion trap before extraction to the time-of-flight …
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The Development of a Novel Peptide-Drug Conjugate for Treating Triple-Negative Breast Cancer
… HPLC and characterized by MALDI-TOF mass analysis. Its stability was studied in different conditions including aqueous-organic solvent mixture, human serum and mouse serum. The PDC was stable in aqueous-organic condition up to 10 days. In addition, its half-life in human serum was …
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The isolation and characterization of heat shock protein Hsp12 in Lipomyces starkeyi
… all the species investigated. MALDI-TOF peptide mass analysis after tryptic digestion of the L. starkeyi 12 kDa protein showed that a close sequence similarity existed to that of S. cerevisiae Hsp 12 and none to rest of the 12 kDa proteins isolated from all the other species investigated. In …
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Autocatalytic mechanism and functional consequences of covalent heme attachment in CYP4B1
… was identified as Glu310 in the I-helix, via mass analysis of heme-containing tryptic peptides, sequence alignments, and site-directed mutagenesis. Two-dimensional NMR and chromatographic analysis of base-hydrolyzed hemes revealed that native CYP4B1 heme was modified solely at the C-5 methyl, …
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Investigations of biological interactions by hydrogen deuterium exchange Fourier transform ion cyclotron mass spectrometry: novel methods, automated analysis and data reduction
… by Fourier transform ion cyclotron resonance mass spectrometry (FTICR MS). For the first time, a series of oligonucleotides of varying length are interrogated by negative mode gas phase H/D exchange. Data presented describes the reactivity of these oligonucleotides and correlates reactivity to …
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