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116 citations found for Kitamura,

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A diffractometer for powder samples of very small amount has been developed to collect high-quality diffraction patterns under extreme conditions. Performance, examples of application and practicability are presented.

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In the the title compound, the planes of the two nitro groups make dihedral angles of 54.77 (8) and 55.60 (3)° with the anthra­quinone ring system, which is essentially planar. In the crystal, mol­ecules are linked by short inter­molecular O...O contacts, leading to a three-dimensional network structure.

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In an attempt to brominate 1,4-diprop­oxy-9,10-anthra­quinone, a mixture of products, including the title compound, C14H7BrO4, was obtained. The mol­ecule is essentially planar (r.m.s. deviation = 0.029 Å) and two intra­molecular O-H...O hydrogen bonds occur. In the crystal, the mol­ecules are linked by weak C-H...O hydrogen bonds, Br...O contacts [3.240 (5) Å], and [pi]-[pi] stacking inter­actions [shortest centroid-centroid separation = 3.562 (4) Å], generating a three-dimensional network.

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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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Before the commissioning of SPring-8, the in-vacuum hybrid undulator developed at SPring-8 had been brought to the ESRF for the first beam test in the summer of 1996. The purpose of this test was to investigate the influence of the in-vacuum undulator on the beam and check its vacuum system. However, heating by the resistive wall impedance turned out to be a critical issue for the in-vacuum undulators.

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There are several ways of producing circularly polarized light, such as using asymmetric devices, crossed undulators etc. The SPring-8 helical undulator introduces a simple way of producing both horizontal and vertical fields in one undulator. All the magnet arrays are arranged above and below the plane of the electron orbit, so there is no limitation of access from the sides of the undulator. For the SPring-8 BL25SU, two helical undulators will be installed in tandem, and the helicity of the polarization can be switched at up to 10 Hz using five kicker magnets.


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The neutron diffraction study at 20 K on a single crystal of cyclodecaamylose·27.18H2O permitted the characterization of the hydrogen-bond network in the novel structural motifs band-flip and kink which occur in larger [alpha]-(1[rightwards arrow]4)-D-glucoside oligosaccharides with 10 or more glucoside units.


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1,3-Propanediol dehydrogenase (Aq_1145) from A. aeolicus VF5 has been overexpressed, purified and crystallized. The crystals diffracted to 2.4 Å resolution.

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Acta Cryst. (1996). A52, C18
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The glucose dehydrogenase (GDH) protein from T. thermophilus HB8 was cloned, expressed, purified and crystallized. GDH crystals belong to space group P21 and diffract to 1.9 Å resolution.

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The molybdopterin synthase from T. thermophilus HB8 was cloned, expressed, purified and crystallized. The crystals belong to space group P21 and diffracted to a resolution of 1.64 Å.


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Class II release factor 3 (RF3) from the sulfate-reducing bacterium D. vulgaris Miyazaki F has been overexpressed, purified and crystallized in complex with GDP.

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Acta Cryst. (2011). A67, C174
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