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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 6
Displaying 1-9 of 9 articles from this issue
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Tatsuhisa KATO2006 Volume 55 Issue 6 Pages 369-378
Published: December 15, 2006
Released on J-STAGE: July 21, 2010
JOURNAL FREE ACCESSHigh field-high frequency electron spin resonance (esr) spectroscopy is applied to the determination of spin parameters for metallofullerenes. The esr measurements combined with multi-frequency microwave are in-dispensable for unambiguous determination of the parameters. The magnetic field independent terms in the spin Hamiltonian can be easily distinguished from the dependent ones by using the multi-frequency esr measurements. The orientation-dependent g-tensor of La@C82 can be determined by W-band measurements. The fine structures in the high spin system of Eu@C82 are clearly analyzed by the combination of W-band spectroscopy with X-band one. In Gd@C82 there are two spin sites within a molecule, the high spin site on the Gd3+ ion and the other radical site on the fullerene cage. The exchange interaction is valued by the temperature dependent W-band measure-ments. The large hyperfine interaction due to La2 dimer nuclei within C80 is investigated for La2@C80 anion.View full abstractDownload PDF (17972K) -
Yasuo NODA, Satoshi IIMURA, Shin-ichi SEGAWA2006 Volume 55 Issue 6 Pages 379-387
Published: December 15, 2006
Released on J-STAGE: July 21, 2010
JOURNAL FREE ACCESSThe NMR structure determination method is well established as a powerful tool in protein research, but an amide hydrogen-exchange NMR is also a unique approach, providing important information on structural fluctua-tions in protein at the resolution of an individual residue. Here we survey hydrogen-deuterium (H-D) exchange NMR studies on protein dynamics and folding. The purpose of this article is to explain what the H-D exchange NMR method is, and to demonstrate how to obtain information about protein dynamics from such experiments. H-D exchange NMR experiments for lysozyme variants lacking some of the disulfide bridges are reviewed as an ex-ample of studies. In addition, recent developments in H-D exchange NMR methods are surveyed with concern about pulsed hydrogen-exchange labeling to detect kinetic folding intermediates. Finally, we describe our challenge to study structurally blocked hydrogens in lysozyme variants in the non-native state by using the H-D exchange NMR method.View full abstractDownload PDF (14830K) -
Daisuke ISHII, Norio YOSHIMURA, Masao TAKAYANAGI2006 Volume 55 Issue 6 Pages 388-393
Published: December 15, 2006
Released on J-STAGE: July 21, 2010
JOURNAL FREE ACCESSDiffuse-reflection near-infrared absorption spectra of water adsorbed on various fabrics (cotton, linen, rayon, silk, wool, polyester, nylon, and polyacrylonitrile) were obtained by calculating difference spectra of the fabrics before and after drying with a thermostatic hot-air oven. Peak wavenumbers, widths, shapes, and intensities of the bands due to the water were found to depend on the kind of fabric. The dependence is presumably caused by the difference of the amount of water and of the interaction between the water and fiber molecules. Linear regres-sion lines were obtained for the relations between the amount of water measured as the weight and the peak intensity of the water band around 5140 cm-1. Quantitative analysis of water content of fabrics was found to be possible.View full abstractDownload PDF (898K) -
[in Japanese], [in Japanese], [in Japanese]2006 Volume 55 Issue 6 Pages 394-396
Published: December 15, 2006
Released on J-STAGE: July 21, 2010
JOURNAL FREE ACCESSDownload PDF (197K) -
[in Japanese], [in Japanese]2006 Volume 55 Issue 6 Pages 397-399
Published: December 15, 2006
Released on J-STAGE: July 21, 2010
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[in Japanese]2006 Volume 55 Issue 6 Pages 400-401
Published: December 15, 2006
Released on J-STAGE: July 21, 2010
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[in Japanese], [in Japanese]2006 Volume 55 Issue 6 Pages 402-406
Published: December 15, 2006
Released on J-STAGE: July 01, 2011
JOURNAL FREE ACCESSDownload PDF (6331K) -
[in Japanese]2006 Volume 55 Issue 6 Pages 407
Published: December 15, 2006
Released on J-STAGE: July 21, 2010
JOURNAL FREE ACCESSDownload PDF (2061K) -
VI. Magnetic Resonance ImagingHidehiro WATANABE2006 Volume 55 Issue 6 Pages 408-419
Published: December 15, 2006
Released on J-STAGE: July 21, 2010
JOURNAL FREE ACCESSMagnetic resonance imaging (MRI) method gives us images of subjects with good quality non-invasively. Nowadays, this is an indispensable method especially in clinical fields. In a 2 dimensional imaging method, ampli-tude of magnetization in each pixel on a slice of a subject is controlled using T1, T2, diffusion constant and etc. This differentiation of magnetization amplitude generates imaging contrast. The controlled magnetization in each pixel is measured using gradient pulses which transform position to frequency. It means that position is treated as frequency in MRI during application of gradients. As a result, images with good contrast to noise ratio can be ob-tained. These important two techniques of imaging using gradients and contrast generation are described. In im-aging section, a slice, a frequency encoding and phase encoding techniques are described in detail. In contrast generation section, T1 and T2 weighted imaging methods are described.View full abstractDownload PDF (22609K)
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