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Analysis of amlodipine in human plasma by gas chromatography 总被引:3,自引:0,他引:3
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R. L. Lichti K. H. Chow D. W. Cooke S. F. J. Cox E. A. Davis R. C. DuVarney T. L. Estle B. Hitti S. R. Kreitzman R. Macrae C. Schwab A. Singh 《Hyperfine Interactions》1994,86(1):711-716
Longitudinal-field muon-spin depolarization rates in high-purityGe and semiinsulatingGaAs are reported and compared to similar data for intrinsicSi. Depolarization onset temperatures provide a comparison of charge carrier concentrations leading to rapid charge exchange and a shift in the onset, for n-typeGaAs verifies anelectron process. The temperature dependence of the low-field rate constants imply more complicated dynamics inGe than observed earlier inSi. Features near 750K inGaAsTe appear consistent with dissociation of aMu-Te pair.This work was supported by the US National Science Foundation (DMR-8917639 [TLE, BH]), the Science and Engineering Research Council of the UK (EAD, AS, SFJC), the Robert A. Welch Foundation (D-1053 [RLL], and C-1048 [TLE]), and a NATO Collaborative Research Grant (RLL, SFJC, RCD, CS). We wish to thank D.A. Vanderwater of Hewlett Packard for providing theGaAsTe sample. 相似文献
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RITVA LINDBERG GORAN SUNDHOLM JOHAN SJö BLOM PETRI AHONEN ESKO I. KAUPPINEN 《Journal of Dispersion Science and Technology》2013,34(1-2):715-722
The zeta-potentials of silica, copper, platinum and gold particles have been measured as a function of pH. The isoelectric points were found to be at pH 3.0, 5.8, 3.0 and 3.5, respectively. In the pH range 3.0 to 5.8 copper and silica particles are oppositely charged and accordingly the coating of silica with copper particles could be demonstrated. In the case of gold and platinum the sign of the charge is such that direct adhesion to silica particles cannot be expected and this was also demonstrated in the case of platinum. 相似文献
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van Enk SJ 《Physical review letters》2000,84(4):789; author reply 790
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The uniaxial pressure dependence of the muonium hyperfine tensor was measured at 80 K. Uniaxial pressures (0 and 0.2 GPa)
were applied along the a‐axis of quartz, and the hyperfine tensor was measured by applying various transverse fields between
0 and 7 G. The structure appears to be the result of the three chemically equivalent sites in quartz. When pressure is applied
perpendicular to the crystallographic c‐axis of quartz, the symmetry of these sites is broken such that two chemically inequivalent
sites are observed. The resulting hyperfine structure is discussed and qualitative explanations are proposed.
This revised version was published online in August 2006 with corrections to the Cover Date. 相似文献
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Muonium spin relaxation measurements of the \alpha‐, \beta‐, and \gamma‐tridymite phases of quartz have been carried out over
a temperature range from 300 to 1250 K. Anomalous relaxation rate increases are observed which may result either from resonance
coupling between the other impurity ions and defects in the lattice and the diffusing muonium, or may result from phonon interactions
with the muonium quadrupole moment.
This revised version was published online in August 2006 with corrections to the Cover Date. 相似文献
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