Academic literature on the topic 'Isotope kinetic effect'

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Dissertations / Theses on the topic "Isotope kinetic effect"

1

Lu, Siran. "Single molecule kinetic isotope effect." Thesis, University of Oxford, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.526483.

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2

Kopec-Harding, Kamilla Rosa. "Computational studies of the kinetic isotope effect inmethylamine dehydrogenase." Thesis, University of Manchester, 2012. https://www.research.manchester.ac.uk/portal/en/theses/computational-studies-of-the-kinetic-isotope-effect-inmethylamine-dehydrogenase(b6883173-40ea-4a35-948b-c966105230cd).html.

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There is currently experimental evidence of hydrogen tunnelling in over 20 different enzymes include yeast alcohol dehydrogenase (YADH), morphinone reductase (MR) and methylamine dehydrogenase (MADH). Various models have been used to describe hydrogen tunnelling in enzymes including the static barrier model, the vibrationally enhanced ground state tunnelling model (VEGST) and the environmentally coupled tunnelling model (ECT). Despite some differences in these models, there is a general consensus that a temperature dependent kinetic isotope effect (KIE) is indicative of tunnelling dominated by
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3

Burke, Erin E. "Heavy atom and hydrogen kinetic isotope effect studies on recombinant, mammalian sialyltransferases." [Gainesville, Fla.] : University of Florida, 2005. http://purl.fcla.edu/fcla/etd/UFE0011586.

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4

Ingle, Shakti Singh. "RNA structure investigation: a deuterium kinetic isotope effect/hydroxyl radical cleavage experiment." Thesis, Boston University, 2013. https://hdl.handle.net/2144/12787.

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Thesis (Ph.D.)--Boston University PLEASE NOTE: Boston University Libraries did not receive an Authorization To Manage form for this thesis or dissertation. It is therefore not openly accessible, though it may be available by request. If you are the author or principal advisor of this work and would like to request open access for it, please contact us at open-help@bu.edu. Thank you.<br>The hydroxyl radical is widely used as a high-resolution footprinting agent for DNA and RNA. The hydroxyl radical abstracts a hydrogen atom from the sugar- phosphate backbone of a nucleic acid molecule, creatin
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Yousefi-Shivyari, Niloofar. "Isotope ratios in source determination of formaldehyde emissions." Thesis, Virginia Tech, 2020. http://hdl.handle.net/10919/99308.

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Formaldehyde emissions from non-structural wood composites are regulated and the regulation target is urea-formaldehyde (UF) resin. UF resins are hydrolytically unstable and constantly emit formaldehyde as a function of temperature and relative humidity. When heated, wood also generates formaldehyde, but this was of little concern until 2010 when formaldehyde regulations became much more demanding. This regulation motivated the industry to account for all formaldehyde sources, synthetic as from resin, and biogenic as from wood. This effort represents first steps towards quantifying biogenic an
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MacMillar, Susanna. "Isotopes as Mechanism Spies : Nucleophilic Bimolecular Substitution and Monoamine Oxidase B Catalysed Amine Oxidation Probed with Heavy Atom Kinetic Isotope Effects." Doctoral thesis, Uppsala : Acta Universitatis Upsaliensis (AUU), 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-7441.

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7

Pagano, Philip Lee Jr. "Investigating fast dynamics at the tunneling ready state in formate dehydrogenase." Diss., University of Iowa, 2017. https://ir.uiowa.edu/etd/5592.

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Enzyme dynamics occur on a wide range of length and timescales. This work is focused on understanding enzyme dynamic at the fs-ps timescale as this is the dynamic range at which bonds are typically made and broken during chemical reactions. Our work focuses on enzymes that catalyze hydride transfer between two carbon atoms - a fundamental reaction in biology. Primary kinetic isotope effects and their temperature dependence have implied that fast dynamics of the enzyme are important in facilitating hydride transfer, however these experiments do not measure any such motions directly. We make use
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8

Indurugalla, Deepani. "A kinetic isotope effect study on the acid-catalyzed hydrolysis of methyl xylopyranosides and methyl 5-thioxylopyranosides." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape10/PQDD_0021/NQ37716.pdf.

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9

Lorenzini, Leonardo. "Effects of T3 and 3-iodothyronamine (T1AM) on cellular metabolism, and influence of serum proteins on T1AM assay." Doctoral thesis, Università di Siena, 2018. http://hdl.handle.net/11365/1046523.

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Thyroxine (T4) is the predominant form of thyroid hormone (TH). In target tissues, T4 is enzymatically deiodinated to 3,5,3′-triiodothyronine (T3), a high-affinity ligand for the nuclear TH receptors TRα and Trβ. T3 modulates genes transcription via activation of TRα and TRβ. Non-genomic effects have also been described. In 2004 the research groups of professors Scanlan Grandy and Zucchi discovered an endogenous thyroid hormone derivative called 3-iodothyronamine (T1AM). They proved that at nanomolar concentrations it can activate trace amine associated receptors 1 (TAARs)[1] and it may also
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Richan, Teisha. "Conservative Tryptophan Mutations in Protein Tyrosine Phosphatase PTP1B and its Effect on Catalytic Rate and Chemical Reaction." DigitalCommons@USU, 2017. https://digitalcommons.usu.edu/etd/5584.

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Protein-tyrosine phosphatases (PTPs) catalyze the hydrolysis of phosphorylated tyrosines by a 2-step mechanism involving nucleophilic attack by cysteine and general acid catalysis by aspartic acid. In most PTPs the aspartic acid resides on a flexible protein loop, consisting of about a dozen residues, called the WPD loop. PTP catalysis rates span several orders of magnitude, and differences in WPD loop dynamics have recently been show to correlate with the rate of enzymatic catalysis. The rate of WPD loop motion could possibly be related to a widely conserved tryptophan residue on the WPD loop
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