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28 citations found for Matsunaga,

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In the crystal structure of the title compound, [Zn(H2O)6](C6H2N3O7)2·3H2O, the zinc cation complexes and picrate anions are stacked separately, extending along the b axis. No picrate species ligate to the metal cation. This lack of picrate coordination is atypical among metal picrate salts. We speculate that the size of the metal-aqua complex as related to the inter­molecular distance of the picrate anions in the [pi] stack can be a measure of the formation of such separated stacks in the crystal structures of divalent metal complexes with picrate anions. Picrate ions are linked to each other with short inter­molecular C...C contacts of 3.223 (6) and 3.194 (6) Å in the stack.

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In the crystal structure of the title compound, [Fe(H2O)6](C6H2N3O7)2·2H2O, the centrosymmetric cationic iron com­plexes and picrate anions form separate stacks extending along the b axis. No picrate species ligate to the metal cation. Picrate ions are linked to one another in the stack via short intermolecular C...C contacts of 3.083 (4) and 3.055 (4) Å. Variable-temperature X-ray diffraction measurements per­formed between room temperature and 93 K showed a linear decrease of the lattice parameters, suggesting that there is no phase transition.

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It was clarified biochemically that only one of the two homologues of glutamyl-tRNA synthetase (GluRS) functions as a nondiscriminating (ND) GluRS in Thermotoga maritima. Furthermore, the crystal structure of the T. maritima ND-GluRS in complex with a Glu-AMP analog was determined at 2.0 Å resolution.

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Crystallization of a sputtered Sb8Te3 film was investigated by powder X-ray diffraction.

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The crystal structures of Sb-Te compounds that are materials currently used for DVDs were investigated by powder X-ray diffraction using synchrotron radiation. Each structure is fundamentally a simple stacking structure, but the stacking period changes regularly with composition and becomes extremely long.


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Crystallization and preliminary crystallographic study of cytochrome P450 from B. subtilis, which catalyzes hydroxylation of long-chain fatty acids at the [alpha] and [beta] positions using H2O2 as an oxidant, is reported.

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The putative GTPase PH0525 from P. horikoshii OT3 was crystallized using the microbatch method. Crystals were formed under two different conditions, providing two distinct crystal forms. Diffraction data from the two forms were measured to resolution limits of 2.30 and 2.40 Å and processed in space groups P21 and C2221, respectively.

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The GeSb6Te10 and GeBi6Te10 intermetallic compounds have 51-layered cubic close-packed stacking structures in common. In these structures the Ge/Sb (Ge/Bi) and Te layers are stacked alternately; Te atoms exclusively occupy their own specific layers, whereas Ge and Sb (Bi) atoms are randomly located at the other layers, causing a partially disordered atomic occupation in these layers.

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Crystal structures of stable and metastable Ge2Sb2Te5, which is a material for phase-change memory, were investigated in detail by powder X-ray diffraction using SPring-8, a synchrotron radiation facility.

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On heating, amorphous Ag3.1In3.7Sb76.4Te16.5 crystallizes at 416 K in an A7 structure type with atomic sites randomly occupied by the four constituent elements. At 545 K the compound decomposes into two crystalline phases: AgInTe2 is stable up to the melting point, while Sb89Te11 has a modulated layer structure with a temperature-dependent layer period.

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Ge2Bi2Te5 in the GeTe-Bi2Te3 pseudobinary system has two single-crystalline phases: a metastable phase with an NaCl-type structure and a stable phase with a nine-layer trigonal structure. These two crystalline phases in Ge2Bi2Te5 have atomic configurations identical to those found in the two corresponding phases of Ge2Sb2Te5.

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A putative member of the Lrp/AsnC family of transcriptional regulators, ST1022 from S. tokodaii strain 7, has been purified and crystallized in the absence and presence of the effector L-glutamine. A molecular-replacement solution was found using the FL11 transcriptional regulator from Pyrococcus sp. OT3 as a model and structural refinement is under way.

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