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203 citations found for Kimura,

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Acta Cryst. (2014). A70, C1136
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A three dimensionally magnetically oriented microcrystal array (3D-MOMA) is attractive to determination of a crystal structure as well as a molecular structure because it does not require a single crystal with sufficient size and quality for diffraction studies. We have developed a novel method to fabricate 3D-MOMA and determined several crystal structures using the 3D-MOMAs[1],[2]. However, the structure determination through MOMA requires a solidification treatment with UV curable monomer prior to X-ray diffraction experiment. We have developed a new X-ray diffractometer equipped with a magnetic field generator, which makes it possible to collect diffraction data without the solidification treatment. In this poster, we describe X-ray diffraction analyses of a magnetically oriented microcrystal suspension (MOMS) of L-alanine without the solidification treatment. A suspension of L-alanine microcrystals was poured in a glass capillary and rotated at a constant speed in a magnetic circuit attached in the X-ray diffractometer. Then, diffraction images were collected every 60 seconds. In the initial phase, the diffraction pattern showed a broad shape similar to that from a powder sample. As time goes on, diffraction patterns have gradually changed to single-crystal like patterns. After 2 hours, the shape of diffraction spots became as sharp as that of a single crystal. This observation shows that the microcrystals are oriented in the same direction. Owing to the improvement of the magnetic circuit and X-ray diffractometer, the quality of the diffraction has been greatly improved compared to that reported previously[3]. Further details of the analyses will be shown in the poster.

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Acta Cryst. (2014). A70, C1136
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A three dimensionally magnetically oriented microcrystal array (3D-MOMA) is attractive to determination of a crystal structure as well as a molecular structure because it does not require a single crystal with sufficient size and quality for diffraction studies. We have developed a novel method to fabricate 3D-MOMA and determined several crystal structures using the 3D-MOMAs[1],[2]. However, the structure determination through MOMA requires a solidification treatment with UV curable monomer prior to X-ray diffraction experiment. We have developed a new X-ray diffractometer equipped with a magnetic field generator, which makes it possible to collect diffraction data without the solidification treatment. In this poster, we describe X-ray diffraction analyses of a magnetically oriented microcrystal suspension (MOMS) of L-alanine without the solidification treatment. A suspension of L-alanine microcrystals was poured in a glass capillary and rotated at a constant speed in a magnetic circuit attached in the X-ray diffractometer. Then, diffraction images were collected every 60 seconds. In the initial phase, the diffraction pattern showed a broad shape similar to that from a powder sample. As time goes on, diffraction patterns have gradually changed to single-crystal like patterns. After 2 hours, the shape of diffraction spots became as sharp as that of a single crystal. This observation shows that the microcrystals are oriented in the same direction. Owing to the improvement of the magnetic circuit and X-ray diffractometer, the quality of the diffraction has been greatly improved compared to that reported previously[3]. Further details of the analyses will be shown in the poster.

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Acta Cryst. (2008). A64, C503
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Reverse Monte Carlo software to analyze the atomic arrangements of perovskite oxide ultrathin films from the crystal truncation rod intensity is developed on the basis of Bayesian inference.

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Acta Cryst. (1993). A49, c392
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The present situation of the XAFS database in Japan and a proposal for the construction of an international collaboration XAFS database are presented.

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Acta Cryst. (2011). A67, C777-C778
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A program and methodology are proposed to study X-ray absorption fine structure of potential reference samples across XAS beamlines and synchrotron facilities, to enable each beamline to cross-calibrate, provide representative benchmarks and to enable more productive collaborative cross-facility activities.

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The crystal structure of P. malariae plasmepsin 4 (PmPM4) complexed with the allophenylnorstatine-based inhibitor, KNI-764, is reported. The inhibitor is shown to be bound to PmPM4 in an unexpected orientation with allophenylnorstatine occupying the S1' pocket.

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Acta Cryst. (2008). A64, C464
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Crystals of KNI-272, a highly selective HIV protease inhibitor, were grown in three different solvent systems. The local conformations around the hydroxymethylcarbonyl moiety were similar in all three forms with a remarkable similarity in the C-terminal region. Their conformational characteristics of the uncomplexed forms resembled those of the inhibitor within the KNI-272-HIV protease complex. This suggests that the structure of the C-terminal region of KNI-272 is rigid or very stable.

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Poly-[gamma]-glutamate hydrolase from bacteriophage [Phi]NIT1 was crystallized by the sitting-drop vapour-diffusion method and the crystals diffracted to beyond 2.4 Å resolution.

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A new bending-magnet beamline with a 2.5 m normal-incidence monochromator mainly dedicated to photoluminescence measurements of solids has been constructed at the UVSOR-III.

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Acta Cryst. (2008). A64, C527
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A single-beam optical-trap sample holder for X-ray diffraction measurement of a single nanometre-sized particle was developed. The measurement for a single particle makes it possible to investigate the one-to-one relation between crystal structure and crystallite size of a particle.

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SPring-8 is constructing most of its beamlines by combination of standardized components according to the light-source characteristics. Specifications of components as well as a unified method of assembly and alignment are described.

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An azimuthal-rotation sample holder, with improvements in the rotation-angle accuracy and rotation-axes displacement during azimuthal rotation, was developed for molecular-orientation analysis using scanning transmission X-ray microscopy.

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