Resonance measurements

Caruso F, Jory M J, Bradberry G W, Sambies J R and Furiong D N 1998 Acousto-optic surface-piasmon resonance measurements of thin fiims on goid J. AppL Rhys. 83 1023-8... 

Hyperfine stmcture measurements of 75 strong lines at 4020—6200 mm were made by means of interferometer spectrograms. Doublet stmctures occurred in 30 lines with separations of 0.034—0.180 cm ( )- Nuclear spins for Pu and for Pu have been estabUshed to be / = 1/2 and 1 = 5/2, respectively. The spins were based on paramagnetic resonance measurements on a RbPu02(N02)3 crystal (77). 

Cyanuric acid is a titrable weak acid (pffai — 6.88, pifa2 — H-40, pffas — 13.5) (10). The pH of a saturated aqueous solution of pure CA at room temperature is - 4.8. Thermodynamic properties of CA are given ia Table 1. Spectroscopic data are available (1 3). Proton nmr is of limited usefulness because of proton exchange and CA s symmetry and low solubiUty. Nuclear quadmpole resonance measurements ( " N) have been reported (12). 

Nuclear magnetic resonance measurements have led to the conclu-sion that 2-pyridones have about 35% of the aromaticity of benzene and that the formally related l,2-dihydro-2-methylenepy-ridine is not aromatic. A substantial contribution by such resonance is indicated by the electronic spectrum of 2-quinolone, which is... 

Thermal analyses of the sodium salts of several sulphuroxyacids, including some non-isothermal kinetic data, have been reported [813], Evidence for the formation of SOi radicals during such reactions has been obtained [348] by electron spin resonance measurements. 

To the solution is added 900 ml. of water, and the resulting mixture is washed with four 500-ml. portions of ether. The ether layers are combined and washed with 200 ml. of aqueous 10% potassium carbonate and then twice with 200-ml. portions of water (Note 9). The ether layer is dried for 1 hour over 200 g. of anhydrous calcium chloride (Note 10) and the solvent is removed on a rotary evaporator at room temperature to give 145-158 g. of crude product (Note 11). Distillation under reduced pressure through a Vigreux column gives 115-128 g. of a fraction, b.p. 83-86° (54 mm.), w22 d 1.4620-1.4640, containing 95% of l-bromo-3-methyl-2-butanone as established by proton magnetic resonance measurements (Note 11). 

J. D. Seymour, B. Manz, P. T. Callaghan 1999, (Pulsed gradient spin echo nuclear magnetic resonance measurements of... 

Busche S., Kasper M., Beige G., Dieterle F. and Gauglitz G., Quantification of binary mixtures of the freones R22 and R134a by surface plasmon resonance, Measurement Science and Technology, 2004 15 (3) 540. 

Zdzislaw, S. Gordon, T., Optical anisotropy in lipid bilayer membranes Coupled plasmon waveguide resonance measurements of molecular orientation, polarizability, and shape, Biophys. J. 2001, 80, 1557 1567... 

CLASSES OF MAGNETIC RESONANCE MEASUREMENTS ADAPTED FROM EADS (1999)... 

E. Haas, G. T. Montelione, C. A. McWherter, and H. A. Scheraga, Local structure in a tryptic fragment of performic acid oxidized ribonuclease A corresponding to a proposed polypeptide chain-folding initiation site detected by tyrosine fluorescence lifetime and proton magnetic resonance measurements, Biochemistry 26, 1672-1683 (1987). 

Glemser and Rieck (317) demonstrated by infrared spectroscopy that most of the aluminum oxides intermediate between the hydroxides and ot-AlaOg contain hydroxyl groups which may be removed reversibly by heating. This result was confirmed by proton magnetic resonance measurements (318). 

The outer and core radii were determined from optical resonance measurements using Mie theory solutions (Aden and Kerker, 1951 Bohren and Huffman, 1983) for concentric spheres to interpret the resonance spectra. Figure 36 presents some of the data of Ray et al. for a pure component glycerol droplet and for a coated droplet having an initial coating thickness given by yo = 0-321. Here y is a reduced thickness defined by y = (a - aj/a. 

Allen et a/. (1991) performed these computations for 1-octadecene droplets, and they measured the evaporation rate of the droplets as a function of laser power. To determine the absolute irradiance /, of the laser beam, they also measured the force on the particle exerted by the laser beam using the techniques discussed above. The photon pressure force is given by Eq. (87), which involves the complex refractive index. The real component of the refractive index n was determined from optical resonance measurements, and the imaginary component was obtained iteratively. That is, they assumed a... 

Nuclear magnetic resonance measurements of methane adsorbed to various coverages on titanium dioxide have been made by Fuschillo and Renton 16). At a coverage of 0.95 monolayer and at 20.4°K, the X-point for solid bulk methane, these authors observed an abrupt change in the proton resonance line width, presumably due to translational and rotational diffusion of methane molecules. For pure, bulk methane no change has been observed in the line width at the X-point. 

A number of cases have been reported in the literature where the exchange between pairs of ions in a lattice is piedominant, i.e., ions aie exchange coupled in pairs because of their proximity. An example of this is copper acetate 168), where the copper ions occur in pairs which are relatively close, so that the spins of pairs of copper ions are coupled together to form a singlet state (paired spins) and a triplet state (unpaired spins). Resonance measurements 158) permit determination of the magnitude and sign of J. 

Changes In nuclear magnetic resonance measurements of an extensive suite of Australian coals on heating and exposure to pyridine are used to elucidate the molecular conformation of coal macerals Two types of fusible material are Identified In these coals One Is associated with llptlnltes of all ranks and Is typified by fusion commencing at temperatures below 475 K. The other Is associated with vltrlnltes and some Inertlnltes of bituminous coals only and Is characterized by a sharp onset of fusion at temperatures above 625 K. The temperature of onset of fusion Increases with rank for both types The effect of pyridine on the molecular stability of bituminous coals at ambient conditions Is strongly dependent on maceral composition at 86% C and on rank at higher carbon contents ... 

J. Prud homme Through the use of an off-resonance measurement. The methyl signals appeared as two juxtaposed quartets in the middle of which we could see a methyl ene resonance. 

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