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 20 of 167 for “"Deuterated"”.
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Characterization of deuterated stilbene: an organic scintillator for neutron spectroscopy
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2022-04-06 without embargo terms
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Study of CYTOP and deuterated polyethylene coatings for ultracold neutron storage
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2022-04-06 without embargo terms
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A search for muon-catalysed dd fusion in a deuterated organic crystal
… a Vesman-type mechanism in an organic crystal of deuterated anthracene is considered. In order to test this possibility the production of muons by 200 Me V protons incident on a 1mm Pb target is investigated. Two experiments to search for evidence of muon-catalysed fusion in a cylindrical …
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Order and membrane organization in chlorhexidine-lipid mixtures /
… using ^H NMR spectroscopy on a chain-deuterated lipid analog. Lipid-chlorhexidine formulation is known to release the drug into an aqueous medium slowly, maintaining a comparable concentration of the drug for up to four times longer than a direct aqueous solution. The NMR data does not …
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Penetration depth measurements of organic superconductors
… has been measured in single crystals of fully deuterated κ-(ET)2Cu[N(CN)2]Br. This material separates into superconducting (SC) and antiferromagnetic (AFI) phases. The relative amounts of SC and AFI phases has been shown to depend on the cooling rate of these materials in the vicinity of 80 K. …
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AN INVESTIGATION OF THE FEASIBILITY OF BIOMETHYLATION FOR GROUP IV METALS AND COMPOUNDS
… of tin in the environment. From incubations of deuterated trimethyltin species in a number of sediment samples only fully deuterated tetramethyltin species were detected by ms, suggesting that tetramethyltin can only be produced from dismutation of bis-trimethyltin sulphide. Computer simulation …
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Infrared Studies of Rhodopsin, and Its Low Temperature Photoproducts, Bathorhodopsin and Isorhodopsin (Ftir, Vision)
… vibrational modes, experiments were performed on deuterated and hydrated films of native rod outer segments and rod outer segments regenerated with either retinal containing ('13)C at carbon-15 or 15-deuterioretinal, or hydrated films of rod outer segments regenerated with retinal containing …
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Infrared studies of rhodopsin and its low temperature photoproducts, bathorhodopsin and isorhodopsin
… vibrational modes, experiments were performed on deuterated and hydrated films of native rod outer segments and rod outer segments regenerated with either retinal containing 13c at carbon-15 or 15-deuterioretinal, or hydrated films of rod outer segments regenerated with retinal containing 13c at …
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Reactions of energetic carbon atoms produced by ¹²C(p,pn)¹¹C in alkanes and alkyl chlorides: moderator effects and deuterium isotope effects
… reaction ¹²C(p,pn)¹¹C in some specifically-deuterated ethanes and propanes were investigated.
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Chemical Methods for Studying the Biosynthesis of Lantibiotics and Prostaglandins
… to be a pentadienyl radical. Site-specifically deuterated AAs can contribute to corroboration of the proposed structure, as their reaction with the enzyme should lead to predictable changes in the hyperfine pattern observed in the EPR spectrum. We therefore designed syntheses for and prepared …
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Vibrational and thermodynamic properties of ferrocene
… of the S7Fe resonance of crystalline Fc and deuterated Fc has been measured from 4 to 300K. Anharmonic effects are found to be important in crystalline Fe, and a model is presented to account for these effects. Fc undergoes a structural phase transition (T l63.9K for Fc, T = 203.7K for …
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Short-time interdiffusion at polymer interfaces: A probe to study polymer motion
… (HDH), wherein the central half of the chain was deuterated, was interdiffused into a thin layer of similar polymer (DHD), wherein the labeling was reversed, i.e., the two end fractions were deuterated. Since, the total deuteration was equal in both the polymers, initially, the concentration of H …
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Approaches to intermolecular structure elucidation utilizing NMR and DNP parameters
… power needed to achieve saturation using deuterated and nondeuterated 2,4,6-tri-tert-butylphenoxy and galvinoxyl radicals, and ¹⁴N labelled, nondeuterated and ¹⁴N labelled, deuterated 4-hydroxy-TEMPO radicals. Also, selective ¹H DNP enhancements for taxol in solid-liquid intermolecular …
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Part I. A Novel Vitamin B(12) Catalyzed Carbon-Carbon Bond Forming Reaction: Mechanistic Investigations and Aryl Alkene Cyclization. Part II. Mechanistic Investigation of Prostaglandin H Synthase Through the Synthesis of Site Specifically Substituted Arachidonic Acids
Finally, the syntheses of site-specifically deuterated arachidonic acids containing a remote tritium label are reported. These radiolabeled substrates would allow the characterization of the initial radical intermediate for PGHS under aerobic conditions and enzyme turnover. The substrates could …
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Flow 1H Dynamic Nuclear Polarization Studies in Normal Liquids and Supercritical Fluid Carbon Dioxide
… conducted in normal liquids (i.e. neat benzene, deuterated benzene, chloroform) and supercritical fluid CO₂. Initial data collected on the 14N NMR line width of acetonitrile in normal liquids and SF CO₂ resulted in a 2-6 factor increase in the molecular motion of the molecule in the SF--the …
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The neutron-deutron breakup cross section between 8 and 22 MeV
… the energy distributions of breakup protons in a deuterated scintillator. The breakup protons were separated from the recoil deuterons by pulse shape discrimination. A comparison of these measurements with recent calculations favours those performed with local potentials.
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A Convenient Synthesis of Pyrrolnitrin and Related Halogenated Phenylpyrroles
… in good yields. We also prepared brominated and deuterated arylpyrroles 4.27 and 4.28, respectively, for future use in mechanistic studies of the pyrrolnitrin biosynthetic enzymes, PrnB, Prn C and PrnD. This required preparation of the corresponding brominated and deuterated pyrrole …
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Determination of the Site of Ultrasonic Absorption in Suspensions of Large Unilamellar Vesicles
… was also studied by replacing DPPC with per-deuterated DPPC (DPPC whose fatty acyl chains were deuterated), which resulted in a change of $\alpha\lambda\sb{\rm max}$ as a function of frequency. As perturbation of the membrane-aqueous interface and the polar headgroup region do not affect …
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