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104 citations found for Huang, L
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Bovine ubiquinol cytochrome c oxidoreductase has been crystallized in a new form. The space group is C2221 with unit-cell parameters a = 384, b = 118 and c = 177 Å.
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The diamagnetic levitation technique can aid in obtaining high-quality protein crystals. Comparison of the results obtained using three containerless conditions indicated that the diamagnetic levitation technique exhibited the greatest improvement in crystal quality, followed by that using agarose gel.
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In the title complex, [Eu(C14H15N2O2)3(C18H15OP)2], the EuIII ion is surrounded by eight O atoms, six from the β-diketonate ligands and two from the triphenylphosphine oxides, with a distorted triangular dodecahedral coordination.
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The crystal structure of the title compound, C18H16ClN3O2, shows a strong intramolecular O—H
N hydrogen bond.
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The title compound, C18H16N4O4, has been synthesized by condensation of 5-nitrosalicylaldehyde and 4-aminoantipyrine. There are two molecules in the asymmetric unit. The crystal structure shows a strong intramolecular O—H
N hydrogen bond, which leads to the existence of a phenol–imine tautomer.
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The title compound, C10H10N6OS, was synthesized by the reaction of 1H-1,2,4-triazol-3-ylhydrazine with phenyl isocyanate in benzene. The molecule is non-planar, the dihedral angle between the two aromatic rings being 62.07 (7)°. N—H
O, N—H
N and N—H
S hydrogen bonds are observed.
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The crystal structure of the title compound, C18H15Cl2N3O2, shows a strong intramolecular O—H
N hydrogen bond [N
O = 2.598 (3) Å, O—H = 0.81 (3) Å, H
N = 1.86 (3) Å and O—H
N = 152 (3)°], which leads to the existence of a phenol–imine tautomer.
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The title compound, C11H10N2O4, was synthesized from benzimidazole and chloroacetic acid. In the crystal structure, O—H
O hydrogen bonds lead to the formation of extended one-dimensional chains along the [101] direction.
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The crystal structure of the title compound, [Zn(C9H6NO)2(H2O)2], has been redetermined with better R factors (R1 = 0.0471) and higher accuracy than in previous publications. The molecule is centrosymmetric.
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The first structure of a bacterioferritin from a photosynthetic organism (R. capsulatus) was solved by the MIR method at 2.6 Å resolution in the I422 space group and compared with that from E. coli solved in the P21 and P42212 space groups. The new crystals reveal for the first time the presence of the non-symmetric heme molecule on a twofold crystallographic axis. It is concluded that in the crystal each heme site contains a symmetrical mixture of heme in two orientations.
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A high-performance double-crystal-monochromator soft X-ray (DCMSX) beamline has been constructed at the Synchrotron Radiation Research Center (SRRC). This beamline delivers monochromatic photon beams with energies from 1 to 9 keV and a resolving power (E/ΔE) of up to 7000. This beamline provides users with an opportunity to study many important materials, such as high-Tc superconductors, magnetic materials, catalysts, super-alloy compounds etc. Excellent EXAFS and NEXFS spectra have been routinely obtained from this beamline. Several interesting research projects are currently being conducted at this beamline. All the results show that this beamline has been constructed to meet its design goals.
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In the crystal structure of the title compound, C10H9N5O2, intermolecular N—H
N [H
N = 2.13 (2) Å] and N—H
O [H
O = 2.016 (18) and 2.05 (2) Å] hydrogen bonds link molecules into a two-dimensional framework.
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A high-flux and high-resolution VUV beamline (4-40 eV) has been designed and is under construction at SRRC. This beamline, which collects 50 mrad of horizontal radiation, uses a 6 m cylindrical-grating monochromator with an incident angle of 70° instead of the conventional normal-incidence-monochromator (NIM) design. Special features, such as movable entrance slit, bendable vertical focusing mirror and movable curved exit slit, are employed to enhance greatly the beamline performance. With both slit openings set at 10 µm, the energy-resolving power can reach as high as 70000. Photon fluxes of 1 × 1013 and 1 × 1010 photons s-1 are calculated for energy-resolving powers of 1000 and 40000, respectively. The best image size at the sample position is smaller than 0.45 × 0.2 mm.
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Details of the design and operational status of the silicon-nitride-based entrance slit installed in the Taiwan Photon Source 45A beamline are given.
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In the title compound, C22H20O5, the substituted benzene rings are twisted away from the furan ring, making dihedral angles of 54.91 (14) and 20.96 (15)° with the furan ring. The dihedral angle between the two benzene rings is 46.89 (13)°. One ethyl group of one ethoxycarbonyl unit is disordered over two sets of sites with occupancies of 0.56 (12) and 0.44 (12). In the crystal, weak intramolecular C—H
O hydrogen bonds link the molecules into chains along the c axis.
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