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Dissertations / Theses on the topic 'MS/MS fragmentation'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Wright, Patricia Ann. "Understanding MS/MS fragmentation pathways of small molecular weight molecules." Thesis, University of Greenwich, 2015. http://gala.gre.ac.uk/18134/.

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Fragmentation of molecules by collision-induced dissociation (CID) is not well-understood, making interpretation of MS/MS spectra difficult and limiting the effectiveness of software tools intended to aid mass spectral interpretation. An approach is required which is tailored to each individual molecule and improves the ‘chemical sense’ of the software. It was hypothesised that the bonds which break during CID of protonated molecules are the bonds which are elongated, and hence weakened, as a result of conformational changes induced by protonation. Bond length changes for a test set of molecul

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2

Li, Wenzhou. "Protein Identification Algorithms Developed from Statistical Analysis of MS/MS Fragmentation Patterns." Diss., The University of Arizona, 2012. http://hdl.handle.net/10150/242432.

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Tandem mass spectrometry is widely used in proteomic studies because of its ability to identify large numbers of peptides from complex mixtures. In a typical LC-MS/MS experiment, thousands of tandem mass spectra will be collected and peptide identification algorithms are of great importance to translate them into peptide sequences. Though these spectra contain both m/z and intensity values, most popular protein identification algorithms primarily use predicted fragment m/z values to assign peptide sequences to fragmentation spectra. The intensity information is often undervalued, because it is

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3

BURE, Corinne. "FRAGMENTATION DANS UNE SOURCE A ÉLECTRONÉBULISATION." Phd thesis, Université d'Orléans, 2005. http://tel.archives-ouvertes.fr/tel-00010600.

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La thèse a porté sur l'étude de peptides et d'oligonucléotides par fragmentation dans la source électrospray d'un Quattro II (Micromass). L'instrument a d'abord été évalué en mode positif avec des peptides thioester modèles puis en mode négatif avec des oligodésoxynucléotides bromés dont la fragmentation de la base modifiée permet sa localisation dans la séquence. La fragmentation de peptides acétal et diol (aldéhyde hydraté) conduit à un même ion final cyclique. L'hydratation de peptides aldéhyde a été étudiée en solution par RMN et en phase gazeuse par fragmentation dans la source. Les infor

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4

Zhang, Wujuan. "Synthesis and Fragmentation Reactions of Linoleic Acid-Derived Hydroperoxides." Case Western Reserve University School of Graduate Studies / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=case1189133862.

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5

Myers, Tanya R. "New Techniques for the Qualitative and Quantitative Measurement of Naturally-Ocurring Gonadotropin-Releasing Hormone Analogues by Mass Spectrometry." Digital Archive @ GSU, 2007. http://digitalarchive.gsu.edu/chemistry_diss/12.

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GnRH peptides have been discovered in a wide variety of vertebrate and invertebrate organisms, and work is ongoing to characterize additional unique isoforms. This dissertation describes the investigation of reversed-phase chromatographic and mass spectrometric behavior of GnRH peptides, the development and application of an LC-MS/MS method for qualitative identification of GnRH peptides, and the comprehensive validation of an LC-MS/MS method for simultaneous, quantitative measurement of hydroxyproline9GnRH (Hyp9GnRH) and mammalian GnRH (mGnRH) in rat brain tissues. Chromatographic and mass s

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6

Huang, Yingying. "DATA MINING OF PEPTIDE MS/MS SPECTRA TO ELUCIDATE GAS-PHASE PEPTIDE DISSOCIATION MECHANISMS AND IMPROVE PROTEIN IDENTIFICATION." Diss., Tucson, Arizona : University of Arizona, 2005. http://etd.library.arizona.edu/etd/GetFileServlet?file=file:///data1/pdf/etd/azu%5Fetd%5F1133%5F1%5Fm.pdf&type=application/pdf.

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7

Zins, Emilie-Laure. "Etude théorique et expérimentale par ESI/MS/MS de complexes cationisés de bases nucléiques, et de la fragmentation d'ions benzylpyridinium." Paris 6, 2009. http://www.theses.fr/2009PA066239.

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Les sources electrospray sont souvent utilisées en couplage avec la spectrométrie de masse, pour étudier des complexes non covalents d’intérêt biologique. On considère que les complexes caractérisés par des intensités importantes sont le reflet de structures stables formées en solution, mais ce point n’a jamais été démontré. Les résultats que nous avons obtenus, à la fois expérimentalement et théoriquement, dans le cas de la formation de complexes de bases nucléiques autour de cations, montrent que les complexes se forment très probablement lors de l’électronébulisation de la solution. L’énerg

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8

Ballade, Tosco Armelle. "Identification et caractérisation par spectrométrie de masse de substances à activités biologiques produites par des souches de BacillusS." Thesis, Bordeaux 1, 2011. http://www.theses.fr/2011BOR14240.

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Les substances synthétisées par les bactéries du genre Bacillus présentent un grand intérêt en raison de leurs nombreuses activités antimicrobiennes. L’objectif de ce travail a consisté à mettre au point un protocole analytique fiable pour extraire ces substances, et les caractériser par spectrométrie de masse et par leurs activités biologiques. Une première approche par spectrométrie de masse MALDI-ToF ne nous a pas donné de résultats satisfaisants en raison d’un phénomène de suppression spectrale. Une seconde stratégie d’étude combinant deux techniques analytiques a alors été envisagée. Les

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9

Bush, David Roy. "The LC/MS/MS Analysis of Pyridinoline and Desmosines in Hypertensive Mouse Aorta, Elucidation of Arginine and Proline Fragmentation for the Analysis of Arginine Metabolism in Mosquitoes by LC/MS/MS, and Mudpit Identification of B. Pseudomallei Proteins in Urine." Diss., The University of Arizona, 2013. http://hdl.handle.net/10150/293615.

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This dissertation presents an investigation into the application of mass spectrometry to the detection and quantitation of proteins and amino acids in complex biological samples. This is accomplished by two dimensional chromatography (strong cation exchange / reverse phase) coupled to tandem mass spectrometry followed by peptide spectrum matching for the detection of Burkholderia pseudomallei proteins in infected patient urine samples and reverse phase liquid chromatography coupled to a triple quadrupole and quadrupole time of flight mass spectrometers for the quantitation of cross-linked or

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10

Schuhmann, Imelda. "Aufbau einer HPLC-UV-ESI-MS-MS-Datenbank und ihre Anwendung im Screening arktischer und antarktischer Meeresbakterien." Doctoral thesis, [S.l.] : [s.n.], 2005. http://deposit.ddb.de/cgi-bin/dokserv?idn=977037568.

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11

Rivera-Tirado, Edgardo. "Association and Fragmentation Characteristics of Biomolecules and Polymers Studied by Mass Spectrometry." University of Akron / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=akron1196728741.

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12

Gonçalves, Maiara Cristina [UNESP]. "Beneficiamento primário de Passiflora Incarnata L., para obtenção de vitexina por cromatografia líquida de ultra eficiência em Botucatu (SP)." Universidade Estadual Paulista (UNESP), 2017. http://hdl.handle.net/11449/152082.

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Submitted by Maiara Cristina Gonçalves null (maiara.sp@hotmail.com) on 2017-10-31T22:26:38Z No. of bitstreams: 1 Maiara_C_Gonçalves_Dissertaçãof.pdf: 10457679 bytes, checksum: a5a48ce58f99b4fe8a29392db8f2e4f5 (MD5)<br>Approved for entry into archive by LUIZA DE MENEZES ROMANETTO (luizamenezes@reitoria.unesp.br) on 2017-11-13T13:01:38Z (GMT) No. of bitstreams: 1 goncalves_mc_me_bot.pdf: 10457679 bytes, checksum: a5a48ce58f99b4fe8a29392db8f2e4f5 (MD5)<br>Made available in DSpace on 2017-11-13T13:01:38Z (GMT). No. of bitstreams: 1 goncalves_mc_me_bot.pdf: 10457679 bytes, checksum: a5a48ce58f9

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13

VanAernum, Zachary L. "Novel Native Mass Spectrometry-based Fragmentation and Separation Approaches for the Interrogation of Protein Complexes." The Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu1587645820537897.

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14

Weske, Sebastian. "From Copper to Gold: Identification and Characterization of Coinage-Metal Ate Complexes by ESI Mass Spectrometry and Gas-Phase Fragmentation Experiments." Doctoral thesis, Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2019. http://hdl.handle.net/21.11130/00-1735-0000-0005-12EA-F.

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15

Madalinski, Geoffrey. "Désorption / ionisations en spectrométrie de masse appliquées à l' étude structurale de composés liposaccharidiques pour la mise en évidence de biomarqueurs de bactéries." Paris 6, 2005. http://www.theses.fr/2005PA066437.

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16

Waiczies, Sonia. "Modulation of human antigen-specific T-cell response therapeutic implications for multiple sclerosis /." Doctoral thesis, [S.l.] : [s.n.], 2003. http://deposit.ddb.de/cgi-bin/dokserv?idn=969681844.

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17

Wu, Jia-Hau, and 吳家豪. "Elucidation of CID and ETD based MS/MS Fragmentation for Analysis of Cyclic Peptides." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/36605916615873499983.

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碩士<br>國立中興大學<br>分子生物學研究所<br>101<br>The cyclic peptide is one kind of cyclic compounds which combine of the protein and non-protein amino acids, many of kinds has more different functions, such as antibodies, toxic substances, anti-immune substances, ion transfer regulators, protein binding inhibitor or enzyme inhibitors. The application of the cyclic peptide is quite diverse, and gradually attracted the attention of scholars. The research strategy of this experiment is based on electron-spray ionization tandem mass spectrometry (ESI-MS/MS) combine with collision induced dissociation (CID) and

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18

Ko, Han-Chih, and 柯涵智. "Comparison of CID versus ETD based MS/MS fragmentation for the analysis of aminoglycosides." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/13493193735547756537.

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碩士<br>國立中興大學<br>分子生物學研究所<br>105<br>The aminoglycosides are kind of antibiotics that inhibit protein synthesis and contain as a portion of an amino-modified glycoside. It displays bacterial activity against gram-negative and can be used in veterinary medicine and animal feeding to against bacterial infection. Because their overuse and misuse lead to drug resistance in pathogens, identification and detection of these antibiotics in drug, food and human samples is important. Electrospray ionization coupled with collision-induced dissociation (CID) is a commonly used technique to analyze the chemi

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19

Hashemi, Sara. "ESI/MS studies of fragmentation of metallated phthalocyanines /." 2007. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pqdiss&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&rft_dat=xri:pqdiss:MR38780.

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Thesis (M.Sc.)--York University, 2007. Graduate Programme in Chemistry.<br>Typescript. Includes bibliographical references (leaves 71-75). Also available on the Internet. MODE OF ACCESS via web browser by entering the following URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pqdiss&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&rft_dat=xri:pqdiss:MR38780

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20

Ruan, Sin-Ping, and 阮馨平. "Simultaneous Qualitative and Quantitative Analysis of Cyclic Peptides by CID and ETD Based MS/MS Fragmentation." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/14226760103151014995.

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碩士<br>國立中興大學<br>分子生物學研究所<br>103<br>The cyclic peptide is one kind of cyclic compounds which combine of the protein and non-protein amino acids, and the carboxyl function at the C-terminus of a peptide forms a peptide bond with the N-terminal amine group a cyclic peptide is formed. A wide variety of cyclic peptides, and all has different biological functions, such as antibodies, anti-bacterial, anti-cancer, anti-immune substances, toxic substances, ion transfer regulators or protein binding inhibitor. The application of the cyclic peptide is quite diverse, for example: animal feed additive, bio

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21

Kmiec, Kevin. "Factors Affecting the Fragmentation of Peptide Ions: Metal Cationization and Fragmentation Timescale." Thesis, 2012. http://hdl.handle.net/1969.1/ETD-TAMU-2012-08-11243.

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The factors affecting peptide fragmentation have been extensively studied in the literature in order to better predict the fragment ion spectra of peptides and proteins. While there are countless influences to consider, metal cation binding in the gas-phase is particularly interesting. Herein, a comparison of fragmentation patterns of a model peptide series with various charge carriers (H+, Li+, Na+, K+, and Cu+) will assist in determining the location of the preferred binding site of the metal cation and in assessing differences in the fragmentation pattern as a result of this binding site.

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22

Li, I.-Che, and 李逸哲. "Tunable Ionization and Fragmentation by Nanoparticle-assisted MALDI-TOF MS for Structural Determination of Isomeric Oligosaccharides." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/66194001917163051134.

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碩士<br>國立臺灣大學<br>化學研究所<br>99<br>Before advances in tandem MALDI MS had been developed for unambiguous structure determination, MALDI-TOF MS has traditionally been used only for the molecular weight determination of biomolecules. However, analysis of low molecular weight analytes in MALDI-TOF MS is limited due to the severe interference by matrix signals. Recent progresses on the functionalized nanomaterials have impacted the background-free analysis of small molecule. By using matrix functionalized nanoparticles for background-free measurement, we reported a tunable ionization/fragmentation str

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23

Vlk, Mikuláš. "Studium využití derivatizačních reakcí pro ESI-MS analýzu obtížně ionizovatelných aryl chlorokomplexů rhenia." Master's thesis, 2020. http://www.nusl.cz/ntk/nusl-434110.

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Mass spectrometry with electrospray ionization is an excellent method for structural analysis of coordination compounds with outstanding sensitivity and selectivity. However, it fails to detect some low-polar rhenium complexes. This master thesis describes derivatization method of non-ionizable rhenium complexes with 1,2-dihydroxybenzene and 2,3- dihydroxytoluenene. Fragmentation mechanisms and structure of prepared complexes was studied using high resolution mass spectrometry and collision-induced dissociation (CID). Furthermore, density functional theory (DFT) computational method was used f

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24

She, Tzu-Fang, and 佘慈芳. "Subject 1：Comparison of CID versus ETD based MS/MS fragmentation for the analysis of doubly derivatized steroidsSubject 2：Proteomic and bioinformatic analysis of rice leaf in TNG 67 and its aromatic mutant SA0420." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/09512036543943944027.

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碩士<br>國立中興大學<br>分子生物學研究所<br>98<br>1. Steroids are essential hormones of human and significant drugs in treatment of inflammation. There are many diseases which related to concentration of steroids in human body. Because most content of endogenous and Anabolic steroids have similar structural characterization with slightly change of functional groups, the method of qualitative and quantitative analysis should be particular about sensitivity and precision. There are developed techniques of steroid analysis which include enzyme-linked immunosorbent assay (ELISA), GC-MS, and LC-MS. Among these tec

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