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Physical Sciences and Mathematics

University of Massachusetts Amherst

2018

Mass Spectrometry

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Novel Mass Spectrometry Methods For The Analysis Of Covalent And Non-Covalent Protein Structures And Their Influence On The Functions Of Therapeutic Proteins, Jake Pawlowski Jul 2018

Novel Mass Spectrometry Methods For The Analysis Of Covalent And Non-Covalent Protein Structures And Their Influence On The Functions Of Therapeutic Proteins, Jake Pawlowski

Doctoral Dissertations

Biotherapeutics consist of biopolymers (proteins, polysaccharides, DNA, and RNA) that are used to treat a wide range of conditions from cancer to autoimmune disease to enzyme replacement. In recent years biotherapeutics have experience tremendous growth due to advances in technology and our understanding of human biology. They are very important to modern medicine due to their ability to treat diseases which are unable to be treated with small molecule-based drugs. Unlike small molecule drugs which are synthetically produced, biotherapeutics are expressed inside cells. Produced biotherapeutics are not made up of a single homogenous population but instead a population of highly …


Photofragment Imaging Fast Ion Beams, Michael D. Johnston Jr. Jul 2018

Photofragment Imaging Fast Ion Beams, Michael D. Johnston Jr.

Doctoral Dissertations

Metal-containing ions have been the subject of much research due to their roles in catalytic activation and small cluster chemistries. However, they can be difficult to study both experimentally and theoretically, and new approaches are needed. The goal of the research described here is to characterize the electronic structures and thermodynamics of metal-containing ions using gas-phase spectroscopy experiments performed on a powerful new instrument. Presented in the following chapters are the details of a recently built velocity map imaging mass spectrometer that is capable of imaging the photofragments of trap-cooled (≥7K) ions produced in a versatile ion source. This instrument …