Written in English
Thesis (Ph.D.), Dept. of Physics, University of Toronto.
|Contributions||Armstrong, R. L. (supervisor)|
|The Physical Object|
|Number of Pages||107|
Proton spin—lattice relaxation times (T 1) and proton relaxation times along the rf field (T 1ρ) have been measured for polycrystalline (NH 4) 2 SO 4. T 1 versus temperature (T) has two minima, and may be interpreted as due to the two inequivalent NH 4 + tetrahedra reorienting at different frequencies and coupled to each other via dipole—dipole interaction. Cited by: PROTON AND DEUTERON RELAXATION OF MUSCLE WATER OVER WIDE RANGES OF RESONANCE FREQUENCIES B. , DepartmentofChemistry, UniversityofOklahoma, Norman, Oklahoma ABSTRACT Thespin-lattice relaxation time (T,) ofwater protons in mouse muscle was studied from to Hz at several temperatures, and the deuteron T, of musclewater wasstudied . The spin-lattice relaxation rates of protonated and deuterated n-dodecane are measured neat and in various solutions of benzene, carbon tetrachloride and carbon isotopic dilution technique together with an automatic data acquisition system provide a means for evaluating the inter- and intramolecular relaxation of protonated by: A nuclear magnetic resonance spin-lattice relaxation dispersion study of the relaxation of several magnetization components in both natural and deuterated lysozyme solutions was undertaken at 20°C. Proton and deuteron resonances were employed. The two-dimensional time evolution of the magnetization and the spin-spin relaxation were analyzed.
The reactions4Hep →pp+X,3Hep →pp+X and4Hep →ddp have been investigated and the correlation function has been measured for protons and deuterons with small relative momenta. Strong positive correlation has been observed for protons related mainly to the final state interactions in1S0 state. The root mean square radius of the proton source calculated from the correlation function has been. Proton and deuteron field-cycling NMR relaxometry was applied to deuterated and undeuterated bulk polyethyleneoxide and polybutadiene melts and mixtures thereof with molecular weights above the critical value. Spin-lattice relaxation data due to intrasegment (quadrupolar) couplings and intra- and interchain (dipolar) interactions were evaluated. Dimitropoulos and Lalowicz observed shallow maximums in the deuteron relaxation rate below 20 K in 10% deuterated polycrystalline ammonium hexachlorostannate at the resonance frequencies and MHz. Such features are not observed in the data of Fig. 1 for the 5% deuterated crystal. The maximums of the former study are reinterpreted here in terms of the tunnelling of the three protons. The matrix R H (T 2 H, T 1 D) for the well-resolved hydrogen deuteride doublet is mainly determined by the transverse relaxation of the deuteron (i.e., spin-rotation, quadrupolar, dipolar relaxation) and slightly by the longitudinal relaxation of the proton (i.e., dipolar relaxation and spin-rotation).
Deuteron spin-lattice relaxation and spectra were studied in partially and fully deuterated (NH 4) 2 PdCl 6 in the temperature range 5– K. The relaxation rate maximum was observed at 45 K in (ND 4) 2 PdCl value is reduced due to limited jumps by about 33% relative to the theoretical value expected for threefold reorientations. However, the nuclear spin lattice relaxation times of both the triton and deuteron were too short by 2–3 orders of magnitude, as a result of the creation of rotationally excited hydrogen (J=1 T. Warming up for the 'KidsChemistry Coloring BOOK' to publish soon "Nuclear Quark Balloons" Protons fuse to make NEW-trons (called a Deuteron or Deuterium when it . Proton exchange reactions in aqueous solutions of VO2+-oxalic acid, -malonic acid systems. Inorganica Chimica Acta , 61, DOI: /S(00)