Dissertations / Theses on the topic 'NMR spectrometers'
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Chaudhry, Humayun Iqbal. "An evaluation of the performance and mechanistic action of the costabiliser N-phenyl-3-acetyl pyrrolidine-2,4-dione and its derivatives in poly(vinyl chloride)." Thesis, Manchester Metropolitan University, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.311051.
Full textCUNHA, TATIANA F. da. "Aplicação do poli(epsilon-caprolactona) com estrutura estrelada para obtenção de microesferas biorreabsorvíveis." reponame:Repositório Institucional do IPEN, 2012. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10544.
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Dissertação (Mestrado)
IPEN/D
Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP
Ariando, David Joseph. "A Portable Low-Cost NMR Spectrometer." Case Western Reserve University School of Graduate Studies / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=case1515170982121573.
Full textDigby, Megan Elizabeth. "Broadband DC SQUID NMR spectrometry on metals." Thesis, Royal Holloway, University of London, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.322702.
Full textHughes, Leslie Peter. "Maximum entropy methods applied to NMR and mass spectrometry." Thesis, Durham University, 2001. http://etheses.dur.ac.uk/3785/.
Full textMcGill, Colin Adam. "Studies of low-field nuclear magnetic resonance and Raman spectrometries for process analytical chemistry." Thesis, University of Strathclyde, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.248282.
Full textBarlow, G. K. "Development and application of some techniques for proton and sodium NMR." Thesis, University of York, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.383846.
Full textGädke, Achim, Markus Rosenstihl, Christopher Schmitt, Holger Stork, and Nikolaus Nestle. "DAMARIS – a flexible and open software platform for NMR spectrometer control." Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-194317.
Full textPagnano, Marco Aurelio de Oliveira. "Automação de um espectrômetro por ressonância magnética nuclear pulsada." Universidade de São Paulo, 1993. http://www.teses.usp.br/teses/disponiveis/54/54132/tde-19082014-101639/.
Full textThis work describes the Project developped to automatize the pulsed nuclear magnetic resonance spectrometer housed in the laboratory of the professors José Pedro Donoso e Cláudio José Magon. To satisfy our needs we have improved their old equipment, at the level of hardware and software. Were built and programmed the parallel interface between the microcomputer and a pulse programmer made by Tecmag Inc. and with a fast digitizer (10 ns) Nicolet 430. The pulse programmer can control 75 independent output channels during 2048 time intervals. The software we developped allow us to control the whole pulse sequence on a very efficient and practical way. It was written in C-language, and provides the timing signals necessary to generate sofisticated pulse seqüencies, the data acquisition and data transfer to the host computer
Gipson, Geoffrey T. Sokhansanj Bahrad. "Discovery Of discriminative LC-MS and 1H NMR metabolomics markers /." Philadelphia, Pa. : Drexel University, 2008. http://hdl.handle.net/1860/2766.
Full textGouilleux, Boris. "Gradient-based methodson a benchtop spectrometer : new perspectives for low-field NMR spectroscopy." Thesis, Nantes, 2017. http://www.theses.fr/2017NANT4036/document.
Full textHigh-field NMR based on superconducting magnets involves an expensive and bulky equipment, which has hampered the use of NMR in harsh environments. A new generation of benchtop NMR spectrometers, compact and cryogen free, has brought NMR spectroscopy under the chemist’s fume-hood and as close as possible to production sites. The driving force of this PhD project is to improve the analytical performance of these benchtop NMR systems. We report here the first implementation of Ultrafast (UF) 2D NMR- a method yielding 2D NMR spectra in a single scan- as well as modern gradient-based solvent suppression methods on a 43 MHz benchtop spectrometer, including a B0-gradient coil. Substantial optimizations have led to UF experiments at low-field (LF) with a reasonable performance while the acquisition duration is reduced by one order of magnitude. Then, the presence of non-deuterated solvents –commonly used in LF NMR– has been tackled by the development of suppression methods both in static and flowing conditions. This methodological effort has opened new opportunities for benchtop NMR applications. Several on- and in-line real-time monitorings have been performed on different types of chemical reactions: Heck-Matsuda coupling reaction, oxidative neutralization of mustard-gas simulants or even the synthesis of a natural product in flow-chemistry. Besides applications to process monitoring, UF 2D NMR at 43 MHz has been successfully applied to discriminate the botanical origins of a panel of edible oils. This fast 2D approach has provided a better classification than standard 1D experiments while remaining compatible with high-throughput analysis
Li, Jian. "Using cadmium-113 NMR spectrometry to study metal complexation by natural organic matter." Diss., Georgia Institute of Technology, 2000. http://hdl.handle.net/1853/25720.
Full textPetry, David P. "Silicalite Clear Sol Precursors Studied by NMR, Mass Spectrometry and Dynamic Light Scattering." Thesis, University of Manchester, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.525295.
Full textKindahl, Lill. "Structural studies of saccharides and glycopeptides in aqueous solution by ¹H NMR spectroscopy /." Uppsala : Dept. of Chemistry, Swedish Univ. of Agricultural Sciences, 2003. http://epsilon.slu.se/a377.pdf.
Full textWeekes, Anna L. "Design and construction of an ultrasonic probe for use in a Cryo-Magnet NMR Spectrometer." Thesis, Aston University, 1998. http://publications.aston.ac.uk/9612/.
Full textPuschmann, Robert. "Analysis and Quantification of Inositol Poly- and Pyrophosphates by NMR Spectroscopy and Mass Spectrometry." Doctoral thesis, Humboldt-Universität zu Berlin, 2020. http://dx.doi.org/10.18452/21044.
Full textInositol pyrophosphates (PP-InsPs) are a well conserved group of second messengers that are involved in a plethora of cellular processes including phosphate homeostasis, insulin signaling, and apoptosis. Despite much effort, it is still mostly unknown how PP-InsPs exert their diverse functions. In order to decipher the mechanisms, researchers have relied either on metabolic labeling with radioactive inositol or on electrophoretic separation on polyacrylamide gels but these methods either lack ease of use or sensitivity. Therefore, two new analytical tools, based on nuclear magnetic resonance (NMR) spectroscopy, and liquid chromatography coupled mass spectrometry (LCMS), were developed. To overcome the limited sensitivity provided by NMR spectroscopy, a high yielding synthesis of NMR-active 13C-labeled inositol was designed and optimized. Furthermore, a chemoenzymatic synthesis of all mammalian PP-InsPs isomers was developed that relied on a scalable purification strategy utilizing precipitation with Mg2+ ions. Human cells were metabolically labeled with 13C-inositol and the prepared PP-InsPs were used as standards to identify peaks in the NMRspectra. These fingerprint signals enabled the quantification of the corresponding molecules. The LCMS-based method was based on the derivatization of the highly charged inositol pyrophosphates to their corresponding methyl esters by trimethylsilyldiazomethane. The permethylated InsPs and PP-InsPs were suitable for LC separation and MS measurement, and provide a sensitivity unmatched by NMR spectroscopy. The method was established using inositol hexakisphosphate, a simpler analog of PP-InsPs, and methylated InsP6 could be detected at quantities as low as 10 femtomole. However, the adaptation of the derivatization for PP-InsPs proved challenging as the reaction caused degradation of the analyte but strategies to circumvent the decay by changing the derivatization agent to diazomethane were promising.
Chen, Ling. "Improvements in excitation selectivity and spectral precision in Fourier transform NMR and mass spectrometry /." The Ohio State University, 1987. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487330761219982.
Full textShah, Siddharth Prakashchandra. "LIPID COMPOSITIONS OF MICROBIAL ORGANISMS ISOLATED FROM EXTREME ENVIRONMENTS AND THEIR IMPLICATION IN THERMO STABILITY OF BACTERIAL CELL MEMBRANE STRUCTURE." Diss., Temple University Libraries, 2016. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/419298.
Full textPh.D.
Microorganisms with an ability to thrive in harsh environments are referred as “extremophiles”. With advances in biotechnology, interest has grown in the extremophile research because of their unique macromolecules’ characteristics due to their growth environments. Over last decade, researchers have isolated many extremophiles from environments like volcano, salt lakes, hydrothermal vents, deep oceans, Antarctica glaciers etc. Macromolecules of these extremophiles are responsible for their survival in extreme environments. In this research work we have isolated lipid molecules from three different microorganisms. 1) GWE1 strain, a thermophilic bacterium, isolated from dark crusty material from sterilization ovens. 2) 7L strain, a thermophilic bacterium, isolated from Chilean Copahue Volcano. 3) I1P strain, a facultative anaerobe of the family Enterobacteriaceae, recently isolated from Antarctica. Complex lipid arrangement and/or type in the cell membrane are known to affect thermostability of microorganisms and efforts were made to understand the chemical nature of the polar lipids of membrane. In this work, we extracted total lipids from cell membrane, separated them by TLC into various fractions and characterize the lipid structures of fractions with analytical tools such as 1H, 13C, 31P and 2D NMR spectroscopy, ATR-FTIR spectroscopy and MSn spectrometry. In GWE1 strain, we were able to identify glycerophosphoethanolamine, glycerophosphate, glycerophosphoglycerol and cardiolipin lipid classes and an unknown glycerophospholipid class with novel MS/MS spectra pattern. We have also noticed the presence of saturated iso-branched fatty acids with NMR spectra in individual lipid classes. In case of I1P strain, we have identified glycerophosphoglycerol, glycerophosphoethanolamine, glycerophosphate, and acyl glycerophosphoglycerol lipid classes with unsaturated fatty acids in their structure, which could be one of the many reasons for survivability at lower temperatures. In case of 7L strain, we were able to identify glycerophosphoglycerol, cardiolipin, glycerophosphoethanolamine and glycerophosphate lipid classes with saturated iso branched fatty acids. FAME analysis revealed iso-15:0 (52.29 %) and iso-17:0 (18.64 %) as major fatty acyl chains. We did not observe major difference in polar head group composition of lipid classes between thermophiles (GWE1 and 7L) compare to psychrophiles (I1P). Major difference among these three strains was in fatty acid composition of lipid molecule. Both thermophiles showed presence of lipids with long chain saturated fatty acids while I1P showed presence of lipid molecule with unsaturated fatty acid chain. Lipids made of unsaturated fatty acids have lower melting points and they introduce kink in the cell membrane structure. At lower temperatures, these effects allow membrane to maintain fluidity and its functionality, which in turn allows the microorganism to grow at lower temperature. Lipids made with saturated iso branched fatty acid chain have higher melting points and they pack together densely in cell membrane. At high temperature because of higher melting point and dense packing, membrane fluidity is not affected and this effect allows microorganism to grow at the higher temperature. We believe that change in fatty acid composition is one of the many reasons for these microorganisms to survive the extreme condition. Thermostability of the other macromolecules (DNA, enzyme) of these extremophiles is not studied in this dissertation.
Temple University--Theses
Dag, Semiha. "Structural studies of some bacterial lipopolysaccharides and extracellular polysaccharides using NMR spectroscopy and mass spectrometry /." Uppsala : Dept. of Chemistry, Swedish University of Agricultural Sciences, 2005. http://epsilon.slu.se/200545.pdf.
Full textPersson, Josef. "Measurement of Reduction Efficiency in Green Liquor Using a NIR Spectrometer." Thesis, Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-318.
Full textTolonen, A. (Ari). "Analysis of secondary metabolites in plant and cell culture tissue of Hypericum perforatum L and Rhodiola rosea L." Doctoral thesis, University of Oulu, 2003. http://urn.fi/urn:isbn:9514271610.
Full textSrivastava, Abhishek. "Metabolism and bioactivation of nevirapine in humans and rats : Integrated application of NMR and mass spectrometry." Thesis, University of Liverpool, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.526804.
Full textSanh, Alan Dominique. "Peptide-RNA recognition : investigation of non-covalent interactions using ESI-mass spectrometry and proton NMR spectroscopy." Thesis, Heriot-Watt University, 2004. http://hdl.handle.net/10399/352.
Full textOriola, Folch Marta. "Non-destructive condition assessment of painting canvases using NIR spectrometry." Doctoral thesis, Universitat de Barcelona, 2012. http://hdl.handle.net/10803/663091.
Full textSamino, Gené Sara. "Mass spectrometry and nuclear magnetic resonance based metabolomics applied to the study of polycystic ovary syndrome." Doctoral thesis, Universitat Rovira i Virgili, 2013. http://hdl.handle.net/10803/128209.
Full textObjetivos: El presente trabajo tiene dos objetivos generalizables que han sido estudiados con más detalle en la presente tesis doctoral. El primero de ellos es mejorar aspectos metodológicos en el ámbito de la metabolómica y el segundo ha sido la aplicación de la metabolómica en el estudio del síndrome del ovario poliquístico (PCOS). Resultados: Del primer objetivo se han realizado dos trabajos: en el primero, la optimización de un método de extracción común para analizar muestras biológicas en dos plataformas analíticas complementarias utilizadas en metabolómica como son la resonancia magnética nuclear y la espectrometría de masas. Del segundo trabajo realizado se han obtenido unas pautas para abordar los retos que surgen del análisis de datos de metabolómica en espectrometría de masas. Del segundo objetivo también han sido realizados dos trabajos: en ambos se ha utilizado la metabolómica no dirigida para abordar el estudio del PCOS. En el primer trabajo, se ha utilizado la metabolómica para conocer el impacto que ejerce la obesidad en los trastornos metabólicos asociados al PCOS. En el segundo trabajo, se ha utilizado la metabolómica no dirigida para evaluar como afecta la aplicación de una politerapia con medicamentos al metabolismo de pacientes con PCOS. Conclusión: La metabolómica puede ser utilizada como una nueva herramienta para estudiar los trastornos metabólicos.
Paudel, Liladhar. "High Field 1H Nuclear Magnetic Resonance (NMR) Spectroscopy Based Metabolomics and Complex Mixture Analysis by Multidimensional NMR and Liquid Chromatography-Mass Spectrometry (LC-MS)." University of Akron / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=akron1343403647.
Full textForshed, Jenny. "Processing and analysis of NMR data : Impurity determination and metabolic profiling." Doctoral thesis, Stockholm : Dept. of analytical chemistry, Stockholm university, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-712.
Full textVilenius, Esa. "On the analysis of near-infrared point spectrometer data for the investigation of lunar surface mineralogy." [Katlenburg-Lindau] Copernicus Publ.***5004719, 2009. http://d-nb.info/996869182/04.
Full textAjimo, Jacob. "A UV-Visible-NIR, Time-Resolved Fluorescence Spectrometer for High-Pressure Biological Studies." Miami University / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=miami1134160375.
Full textO'Kennedy, Sean James. "A kinetic and thermodynamic study of procyanidin oligomer conformation by 1H NMR and DFT." Thesis, Stellenbosch : Stellenbosch University, 2015. http://hdl.handle.net/10019.1/98054.
Full textChen, Yanyi. "Dissecting Key Determinants for Calcium and Calmodulin Regulation of GAP Junction and Viral Protein." Digital Archive @ GSU, 2012. http://digitalarchive.gsu.edu/chemistry_diss/64.
Full textRigau, Roca Laura. "Identification of protein-ligand interactions by mass spectrometry and NMR, case studies: LFA-1, Bcl-xl and Bcl-2." Thesis, University of Bristol, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.492546.
Full textAbdullah, Sewa Faraj. "Proteomics approaches to polyketide synthases interfaces by mass spectrometry and NMR spectroscopy and the application of chemometrics to metabolomics." Thesis, University of Bristol, 2014. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.682232.
Full textGädke, Achim, Markus Rosenstihl, Christopher Schmitt, Holger Stork, and Nikolaus Nestle. "DAMARIS – a flexible and open software platform for NMR spectrometer control: DAMARIS – a flexible and open software platform for NMRspectrometer control." Diffusion fundamentals 5 (2007) 6, S. 1-9, 2007. https://ul.qucosa.de/id/qucosa%3A14270.
Full textMa, Cunxian. "Tentative Identification of Hydroxylated 2,2',3,5',6-pentachlorobiphenyl Metabolites in Whole Poplar Plants by a Combination of Chromatographic and Spectrometry Techniques." Thesis, University of Iowa, 2014. https://ir.uiowa.edu/etd/4691.
Full textJoubert, Valentin. "Analyse isotopique positionnelle pour les sciences forensiques : développement et utilisation de la spectrométrie RMN quantitative 13C and 15N NMR spectrometry." Thesis, Nantes, 2018. http://www.theses.fr/2018NANT4078/document.
Full textIn the battle against the illicit drugs market, this is drug profiling which is currently used as a tool to track drugs trafficking routes. Profiling methods can rely on synthetic impurities, residual solvents, etc. In the ANR project FRIIME, the same objective will be pursued but using the intrinsic marker of the isotopic content of the target molecules. So far, only overall isotopic content has been exploited and measured by isotope ratio mass spectrometry (irm-MS). By using innovative methods employing nuclear magnetic resonance (NMR), the study of the position-specific isotopic distribution of the targeted products is now obtained. This work was based on the optimization of a multi-pulse sequence (INEPT) enabling to improve significantly NMR 13C sensitivity in order to ensure full isotopic tracing on large molecules. This new tool will be tested on real samples of drug for which the cutting agents will be analyzed to have an isotopic profile marker of their origin. Then new information on networks will be obtained. For the first time, this knowledge will be transposed to 15N position-specific isotopic analysis by quantiative NMR as contribution for explosives analyses as 2,4,6-trinitrotoluene (TNT)
Kew, William. "Tested to destruction : advanced spectroscopic, spectrometric, and chemometric analysis of Scotch whisky." Thesis, University of Edinburgh, 2018. http://hdl.handle.net/1842/33189.
Full textYOSHIMURA, Etsuro, Mariko AKASHI, Tomonari UMEMURA, and Kin-ichi TSUNODA. "Identification of Al(III) Species in a Solution Containing Equimolar Concentrations of Al(III) and Citric Acid Using Varying-Temperature Al NMR Spectrometry." 日本分析化学会, 2000. http://hdl.handle.net/2237/8749.
Full textZoppi, Ugo. "Isobar suppression in accelerator mass spectrometry /." [S.l.] : [s.n.], 1993. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=10373.
Full textAtadana, Frederick Williams. "Catalytic Pyrolysis of Cellulose, Hemicellulose and Lignin Model Compounds." Thesis, Virginia Tech, 2010. http://hdl.handle.net/10919/31251.
Full textThe effect of HZSM-5 catalyst and NaOH pretreatment on the product distribution and bio oil properties from pyrolysis of cellulose, hemicellulose and lignin model compounds was investigated at 450 °C. NaOH pretreated and untreated cellulose was pyrolyzed on sand and the HZSM-5 catalysts; VPISU001 HZSM-5, BASF HZSM-5, and Sud-Chemie HZSM-5. The pyrolysis of cellulose on BASF and Sud-Chemie HZSM-5 catalysts increased the yields of the organic liquid fraction, total liquid and char while decreasing the gas yields. However the catalyst decreased the organic and char yields while increasing the water yields but there was no change in gas yields. The NaOH treatment caused a decrease in the organic and total oil yields relative to the control but the char yield increased. The change in gas yields was not significant. The characterization of the oils using FTIR and 13Câ nmr showed that, the VPISU001 HZSM-5 with and without NaOH pretreatment caused elimination of the levoglucosan fraction while increasing the aromatic fraction. The NaOH pretreated cellulose pyrolyzed on sand reduced the levoglucosan groups while increasing the aromatic fraction of the bio oil. In the hemicellulose studies, birchwood xylan and NaOH treated xylan samples were pyrolyzed on sand and VPISU001 HZSM-5 catalyst. The organic liquid yields were very low and ranged from 3.3 wt% to 7.2 wt%, the water yields ranged from 17.8-25.7 wt%, the char yield were 17.8-25 wt% and gas yield were 40.9-49.6 wt%. The HZSM-5 catalysts increased the water and gas yields and produced the lowest char yield. NaOH pretreatment produced the lowest water yield while the char yield was the highest. The combined effect of NaOH pretreatment and HZSM-5 produced the lowest organic yield and highest char yield. The FTIR and 13C-nmr analyses of the organic liquids showed that the HZSM-5 catalyst promoted the formation of aromatic products, while the NaOH pretreatment promoted the formation of aliphatic hydrocarbons. The combined effect of NaOH pretreatment and HZSM-5 catalyst seem to promote the formation of anhydrosugars. The main gases evolved were CO, CO2 and low molecular weight hydrocarbons. The HZSM-5 catalyst promoted CO formation while NaOH pretreatment promoted CO2. The HZSM-5 catalyst produced the highest yield of low molecular weight hydrocarbon gases. The lignin and model compounds studies involved using low molecular weight kraft lignin, guaiacol, and syringol which were pyrolyzed on sand and VPISU001 HZSM-5 catalyst at 450 °C. The kraft lignin pyrolysis produced low liquid and gas yields and high char yields. The HZSM-5 catalysts increased the water yield and decreased the organic liquid yield. NaOH pretreatment increased the char yield and decreased the liquid products. NaOH and the HZSM-5 catalyst together decreased the char and increased the gas yields. The 13C-nmr and FTIR analysis showed that NaOH pretreatment promoted the formation of mainly guaiacol while the HZSM-5 catalyst formed different aromatic components. NaOH pretreatment promoted the formation of more CO2 than CO whilst HZSM-5 catalyst promoted the formation of more CO than CO2. Methane formation was enhanced by NaOH pretreatment. Other hydrocarbon gases were however enhanced by the HZSM-5 catalysts. Pyrolysis of the model compounds on the HSZM-5 catalyst showed an increase in pyrolytic water. The HZSM-5 catalyst promoted demethylation in syringol pyrolysis as compared to guaiacol.
Master of Science
Bajwa, Tejbir Singh. "Development of a software tool to perform qualitative analysis on spectral data obtained from a NIR-MOEMS spectrometer." abstract and full text PDF (UNR users only), 2009. http://0-gateway.proquest.com.innopac.library.unr.edu/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:1464416.
Full textWilson, Peter Stanley. "Rediscovering Arsenoacetic Acid." The University of Waikato, 2009. http://hdl.handle.net/10289/2778.
Full textMarin, Córdoba Roberto. "Chromium carcinogenesis characterization of DNA damaging intermediates by EPR ³¹P NMR, HPLC, ESI-MS and magnetic susceptibility /." Ohio : Ohio University, 2010. http://www.ohiolink.edu/etd/view.cgi?ohiou1261417590.
Full textChen, Kan. "Applications of Mass Spectrometry to Analysis of Prodiginines, Bioactivated Methylenedianiline Intermediates, and Hypoxia Induced Changes in the Zebrafish Skeletal Muscle Proteome." ScholarWorks@UNO, 2008. http://scholarworks.uno.edu/td/899.
Full textBrodbeck, Roland. "Balloon-borne far-infrared Fabry-Perot spectrometer for astrophysical observations /." [S.l.] : [s.n.], 1997. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=12510.
Full textPuschmann, Robert [Verfasser], Dorothea [Gutachter] Fiedler, Christian P. R. [Gutachter] Hackenberger, and Michael [Gutachter] Hothorn. "Analysis and Quantification of Inositol Poly- and Pyrophosphates by NMR Spectroscopy and Mass Spectrometry / Robert Puschmann ; Gutachter: Dorothea Fiedler, Christian P. R. Hackenberger, Michael Hothorn." Berlin : Humboldt-Universität zu Berlin, 2020. http://d-nb.info/1203624190/34.
Full textPiecuch, Scott. "A Fast NIR Spectrometer for Examining Explosive Events: Emission of PETN Based Explosives and H₂O Absorption Method Feasibility." [Milwaukee, Wis.] : e-Publications@Marquette, 2009. http://epublications.marquette.edu/theses_open/13.
Full textMarchand, Jérémy. "Combining NMR and MS fingerprinting for fine characterization of lipid profiles. : Application to a chemical food safety issue." Thesis, Nantes, Ecole nationale vétérinaire, 2018. http://www.theses.fr/2018ONIR120F/document.
Full textLn order to ensure safe food products for the consumer, the use of growth promoters in livestock farming has been prohibited in European Union since the end of the 80s. Although efficient, the conventional targeted control methods face new challenges to which alternative strategies (untargeted), aiming at identifying metabolic biomarkers characteristic of the effects induced by such practices, provide innovative solutions. In particular, the lipidome is an area of interest to investigate the effects associated with repartition agents. Mass Spectrometry (MS) and Nuclear Magnetic Resonance (NMR) are then classically used independently. This PhD work intends to evaluate their combination benefiting from the different levels of associated information and the consequences in terms of enhanced prediction or biomarker identification. As a study model, blood samples from animals treated with a repartition agent known to disrupt lipid profiles were characterized. The investigation of the serum lipidome with MS involved three distinct platforms providing different outlooks in order ta generate extended coverage; the study of their consistency and complementarity constituting one of the objectives of this PhD. In parallel, the analysis with NMR prompted the development of a complete workflow, from the optimization of the sample preparation conditions to acquisition parameters -including recent fast 2D NMR approaches. Finally, the challenge associated with the analysis of data from multiple sources allowed ta evaluate innovative statistical approaches such as multiblock analysis
Roos, Felix Franz. "Algorithms for peptide identification by tandem mass spectrometry /." Zürich : ETH, 2006. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=16844.
Full textSierk, Bernd. "Solar spectrometry for determination of tropospheric water vapor /." Zürich, 2000. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=13850.
Full text