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104 citations found for Okada,

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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. (2014). A70, C195
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Endohedral lithium fullerene Li+@C60 can have a dielectric polarization by the off-centered location of the Li+ cation inside the C60 cage. The x-ray structure analysis of the PF6- salt [Li@C60](PF6) revealed that the Li+ cation occupies two off-centered equivalent positions at 20 K and hence the crystal is non-polar [1]. The disordered structure at low temperature is explained by a static orientation disorder of polar Li+@C60 cations and/or a dynamic tunneling of the Li+ cation inside the C60 cage. The Li+ tunneling would be suppressed by an intermolecular interaction at lower temperature and a dielectric phase transition might be induced. We reveal the dielectric property and crystal structure of [Li@C60](PF6) below 20 K in this study. The temperature dependence of the dielectric permittivity was measured for the single crystal down to 9 K. The dielectric permittivity increases with decreasing temperature according to the Curie-Weiss law. Such a behavior was also observed in H2O@C60 crystal but not in empty C60 crystal [2]. No dielectric phase transition was observed in H2O@C60 down to 8 K. In contrast, a dielectric anomaly suggesting a phase transition was observed in [Li@C60](PF6) around 18 K. The single-crystal x-ray diffraction experiment below 20 K was also performed at SPring-8 BL02B1. The crystal has a cubic structure at 20 K [1]. The temperature dependence of the cubic lattice constant shows no anomaly around 18 K. However, diffraction peaks that are forbidden for the given structure appear below 18 K. Thus the crystal symmetry is lowered by the dielectric phase transition. We present the result of the crystal structure analysis of the newly discovered low-temperature phase.

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Crystal structures of CN--, NO- and hydroxylamine-bound forms of A. ramosus peroxidase at 1.3 Å resolution show the coordination geometries of the ligands to the haem iron.

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The crystal structure of the 2'-5' RNA ligase PH0099 from P. horikoshii OT3 was solved at 1.94 Å resolution. The molecule has a bilobal [alpha]+[beta] arrangement with two antiparallel [beta]-sheets constituting a V-shaped active-site cleft, as found in other members of the 2H phosphoesterase superfamily.

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Most of the SPring-8 insertion devices are in-vacuum undulators except for the soft X-ray devices and one elliptical wiggler. The standard-type SPring-8 in-vacuum undulator has a period of 32 mm and a minimum gap of 8 mm. The fundamental radiation energy ranges from 5.2 to 18.5 keV. Three standard in-vacuum undulators are already installed in the ring and are operating without any problems. The magnetic field correction, the vacuum system and the commissioning of the in-vacuum undulators are described in this paper.

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Acta Cryst. (1987). A43, C25
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A two-dimensional photon-counting detector based on a micro-pixel gas chamber has demonstrated a dynamic range of >105 and a counting rate of up to 5 MHz.

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BpeB, which is a major multidrug-efflux transporter in Burkholderia cenocepacia, has a C-terminal region that extends beyond those of other homologous resistance-nodulation-cell division transporters such as AcrB and MexB. Comparative modeling helped to identify truncation variants that could aid the crystallization of BpeB without eliminating its molecular functions.

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The putative sensor histidine kinase domain of the cytoplasmic protein HksP4 from the hyperthermophilic bacterium A. aeolicus VF5 was expressed, purified and crystallized by the sitting-drop vapour-diffusion method. Crystals were obtained in the presence of ATP and AMPPNP; they were found to belong to the same space group P212121 and diffracted X-rays to 3.1 and 2.9 Å resolution, respectively.

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Crystals of the Rho-binding domain of Rho-kinase were obtained in both native and selenomethionyl forms. The crystals belong to the space group C2 [a = 148.0 (2), b = 26.1 (1), c = 39.6 (1) Å, [beta] = 90.3 (1)°] and diffract to a resolution beyond 1.5 Å.

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The archaeosine tRNA-guanine transglycosylase from the hyperthermophilic archaeon P. horikoshii was crystallized and data were collected to 2.2 Å. Selenomethionine-labelled protein crystals were prepared, with the aim of solving the structure using a MAD phasing method.

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Acta Cryst. (2005). A61, c258-c259
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A data acquisition system for X-ray free-electron laser experiments has been developed at SACLA. The system was designed for reliable shot-to-shot data storage with a high data stream greater than 4 Gbps and massive data analysis.

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The crystal structure of the ligand-binding domain of rat VDR in complex with a nonsecosteroidal vitamin D3 analogue YR301 has been determined at 2.0 Å resolution.


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Dichloro­(4,4'-dipentyl-2,2'-bipyridine-[kappa]2N,N')platinum(II), [PtCl2(C20H28N2)], adopts a discrete [pi]-[pi] stacking structure, where the alkyl chains are located in a random manner. In contrast, dichloro­(4,4'-diheptyl-2,2'-bipyridine-[kappa]2N,N')platinum(II), [PtCl2(C24H36N2)], forms a layer structure comprised of alkyl chain layers and paired coordination sites, as observed for analogous complexes with longer alkyl chains.

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Acta Cryst. (2002). A58, c284
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