Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 6 of 6 for “"fragmentation pathway"”.
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Mass Spectral Studies to Investigate Butylbenzene Fragmentation Pathway and Pyrolysis Products.
… products are presented. In the first study, fragmentation pathways of n-butylbenzene in quadrupole ion trap have been investigated. At low energy, product ion corresponding to m/z 92 and m/z 91 are formed via competitive parallel dissociation. Studies have also shown that at higher energy m/z …
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Ion mobility and mass spectrometric investigations of organophosphates related to chemical warfare agents and pesticides
… The ITMS was used to perform isolation and fragmentation of the CWA simulants ions produced in the IMS. For the organophosphates dimethyl methylphosphonate, diethyl methylphosphonate and diisopropyl methylphosphonate, two ion mobility peaks were observed, which are shown to be the ammoniated …
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Top-Down Interrogation And Characterization Of Biological Macromolecules
… first part of the thesis deals with gas phase fragmentation behavior of chemically modified oligonucleotides. Factors, such as the observation time-scale, the ion type and the energy deposition method, are explored using a quadrupole/time-of-flight mass spectrometer. Novel fragmentation pathway …
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Gas Phase Studies of Molecular Clusters Containing Metal Cations, and the Ion Mobility of Styrene Oligomers
… the mechanism of formation and the observed fragmentation pathway of the growing dimers and trimers in the gas phase are presentedIn Part II the solvation of a variety of metal cations by benzene clusters have been studied using laser vaporization, cluster beam and time-of-flight mass …
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Design of smart linkers and their applications in controlled-release drug delivery systems
… Finally, we have exploited the use of the Grob fragmentation to design ‘self-immolative’ linkers for controlled drug release. Altough the reaction mechanism is well know and presents several synthethic application, no biological application has been described to date. The screening of different …
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Interaction of the potential DNA-radiosensitizer 8-bromoadenine with free and plasmonically generated electrons
… crossed electron-molecular beam setup. The main fragmentation pathway was revealed as the cleavage of the C-Br bond. The formation of a stable parent anion was observed for electron energies around 0 eV. Furthermore, DNA origami nanostructures were used as platformed to determine electron induced …