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30 citations found for Takayama,

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Acta Cryst. (2019). A75, e335
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A compact racetrack-type 700 MeV storage ring (HiSOR) has been constructed at Hiroshima Synchrotron Radiation Center (HSRC). As the ring was planned for synchrotron radiation research on science and technology using VUV to X-rays up to 5 keV with limited size and cost, the ring was designed (i) to realize a high magnetic field (2.7 T) using conventional dipole magnets for higher critical energy, and (ii) to include two straight sections for insertion devices. A linear undulator (25-300 eV) and a new-type helical/linear undulator were installed at the two straight sections. The latter undulator consists of upper and lower jaws, as in a planar undulator; each jaw consists of one fixed magnet array at the centre and two magnet arrays on both sides. By longitudinal displacement of the side magnet arrays, the phase between the vertical and horizontal magnetic fields, and therefore the polarization (right- or left-circular, elliptical, linear) can be selected. The helical/linear undulator gives almost perfect circular polarization at 4-40 eV in the helical configuration without changing the phase of the magnet arrays, as well as linearly polarized light at 3-300 eV in the linear configuration.

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Crystals of an antigen-binding fragment of the mouse anti-human Fas monoclonal antibody HFE7A have been obtained. Fast optimization to produce single crystals suitable for X-ray analysis was achieved by the streak-seeding technique.

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The horizontal beam property in the phase space of undulator radiation was derived using a tandem-double-slit optical system. The net effective beam emittance was extracted by deconvoluting the Fraunhofer diffraction produced by the upstream slit in the phase space.

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A novel type of zone plate, i.e. an inverse-phase composite zone plate, is proposed and examined with the aim of achieving deeper focus with little reduction in spatial resolution.

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In many cases, complexes of platinum and other metals have a symmetrical structure. In contrast, in the platinum(II) complex with pyridine and N-(9-anthracenylmeth­yl)-1,2-ethanedi­amine as ligands, the molecular structure is asymmetric. Only one of the two pyridine rings is π-stacked with the anthracene ligand enhancing the asymmetry.

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The crystal structure of tridecane-1,13-diol, C13H28O2, a model for liquid crystals, has been determined by X-ray diffraction. The molecules form a layer structure along the a axis as in a smectic A liquid crystal. The skeleton of the molecule has an all-trans conformation. One of the terminal hydroxyl groups is in a gauche conformation, while the other is trans.

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Acta Cryst. (1996). A52, C273
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A perchlorate salt of the hydroxo-bridged cis-diammineplatinum(II) dimer has been shown to possess a bent structure in which two Pt coordination planes within the dinuclear cation are tilted at an angle of 151.7 (1)° to one another.

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The crystal structures of high-molecular-weight cytochrome c (HMC) from Desulfovibrio vulgaris Hildenborough in the transient and reduced states have been determined at 2.8 Å resolution. An absorption spectrum measured with microspectrophotometor indicated that about 86% of the hemes were reduced after 45 min irradiation of the X-ray beam. Further exposure for 90 min did not significantly change the spectrum. These results suggest that HMC in the crystalline state is easily reduced by illumination of the X-ray beam from synchrotron radiation.

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To control a diffractometer and to perform data processing, two software suites with user-friendly graphical user interfaces have been developed to efficiently perform cryogenic coherent X-ray diffraction imaging experiments on non-crystalline particles using an X-ray free-electron laser.

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The software suite SITENNO is developed for processing diffraction data collected in coherent X-ray diffraction imaging experiments of non-crystalline particles using an X-ray free-electron laser.

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