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Volume 55 (2006)
- Issue 6 Pages 369-
- Issue 5 Pages 295-
- Issue 4 Pages 239-
- Issue 3 Pages 157-
- Issue 2 Pages 89-
- Issue 1 Pages 1-
Volume 55, Issue 3
Displaying 1-10 of 10 articles from this issue
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2006 Volume 55 Issue 3 Pages 157-160
Published: June 15, 2006
Released on J-STAGE: July 21, 2010
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Kohei IMURA, Hiromi OKAMOTO2006 Volume 55 Issue 3 Pages 161-172
Published: June 15, 2006
Released on J-STAGE: July 21, 2010
JOURNAL FREE ACCESSWe studied the spatial characteristics of plasmon modes in single noble metal nanoparticles (gold nanorods and others) by linear and non-linear optical methods combined with near-field optical microscopy. Near-field images of the nanoparticles obtained show peculiar spatial patterns, and are attributed to spatial characteristics of plasmon modes (wavefunctions) excited. The images are strongly dependent on observed wavelength, and from the dependence we obtained dispersion relation of the plasmon. We also studied ultrafast dynamics of single gold nanorods by near-field time-resolved technique. We found that energy dissipation processes are strongly dependent on the internal position of the nanoparticle.View full abstractDownload PDF (14551K) -
Taiichi SAKAMOTO2006 Volume 55 Issue 3 Pages 173-181
Published: June 15, 2006
Released on J-STAGE: July 21, 2010
JOURNAL FREE ACCESSRecently, it has become clear that RNA molecules have important or essential biological functions. In this review, the purpose for the analysis of the RNA structure by using NMR spectroscopy, the basis for the folding of RNA structure, and the methodology for the determination of the structure of RNA were described. Furthermore, our ideas and attempts for further technical developments were described. NMR investigation of RNA molecules will provide the basis of biological functions for many RNA molecules.View full abstractDownload PDF (10741K) -
Kohsuke SUMA2006 Volume 55 Issue 3 Pages 182-190
Published: June 15, 2006
Released on J-STAGE: July 21, 2010
JOURNAL FREE ACCESSThe composition of the Earth's atmosphere has been changed by human activities, and some of these changes are harmful to human health and ecosystems. Accurate knowledge on chemical reactions in atmosphere and predictions based on this knowledge are indispensable to solve these problems. However, simulation results based on the present chemical reaction scheme do not agree well with the actual atmospheric phenomena. This fact indicates that unknown chemical reactions may be working efficiently in atmosphere. In this paper, microwave spectroscopic studies of oxygen bearing transient species, which may affect on the atmospheric reactions involving the OH and HO2 radicals, are reviewed.View full abstractDownload PDF (11225K) -
Baozhong CHEN, Mikio KUZUYA, Tkahiro YASUDA2006 Volume 55 Issue 3 Pages 191-196
Published: June 15, 2006
Released on J-STAGE: July 21, 2010
JOURNAL FREE ACCESSA quantitative analysis of trace heavy metals (lead, cadmium, mercury, and chromium) in plastics was carried out with laser-induced plasma spectroscopy (LIPS). A Q-switched Nd: YAG laser beam (pulse energy, 90 mJ; pulse width, 10 ns; repetition rate, 10 Hz) was focused on plastic samples in an argon atmosphere at a pressure of 10 Torr, and the emission spectra of the laser-induced plasma were measured using time-resolved spectroscopy. The experimental results showed that time-resolved measurement of a spectrum with a delay time of 0.4 μs after the laser pulse was effective for reducing the effect of the spectral interference with matrix as well as the background. Under the above conditions, the standard plastic samples (polyethylene and polyvinyl chloride) were analyzed for trace elements of lead, cadmium, mercury, and chromium, and the linear calibration curves with a slope of unity were obtained. The detection limits are plastic material and element-dependent, but are on the order of 10 ppm.View full abstractDownload PDF (805K) -
[in Japanese]2006 Volume 55 Issue 3 Pages 197-198
Published: June 15, 2006
Released on J-STAGE: July 21, 2010
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[in Japanese]2006 Volume 55 Issue 3 Pages 199-201
Published: June 15, 2006
Released on J-STAGE: July 21, 2010
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[in Japanese]2006 Volume 55 Issue 3 Pages 202-203
Published: June 15, 2006
Released on J-STAGE: July 21, 2010
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[in Japanese]2006 Volume 55 Issue 3 Pages 204
Published: June 15, 2006
Released on J-STAGE: July 21, 2010
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Hideo TAKAHASHI2006 Volume 55 Issue 3 Pages 205-220
Published: June 15, 2006
Released on J-STAGE: July 21, 2010
JOURNAL FREE ACCESSNuclear spin relaxation is one of the fundamental aspects of Nuclear Magnetic Resonance (NMR). Transverse relaxation rate governs the linewidth of the resonance, and longitudinal relaxton rate affects the determination of the recycle delay for each acquisition. On the other hand, cross-relaxation causes the nuclear Overhauser effect (NOE) which gives us distance information used for the 3D structure determination of molecules. Recently, crosscorrelated relaxation has been effectively utilized to develop novel NMR mesaurements. In this review, semi-classical treatment of relaxation theory is briefly intuoduced, and by utilizing the derived double commutator operation, various aspects of nuclear spin relaxation are investigated in terms of molecular motions.View full abstractDownload PDF (16005K)
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