Materials Literature
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Electric field-driven fiber formation (electrospinning) is developing into a practical means for preparing novel porous filament with unusual structures and affordable mechanical properties. Polycaprolactone (PCL) was dissolved in solvent mixtures of methylene chloride/N,N-dimethyl formamide with ratios of 100/0, 75/2…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTConducting Metal Dithiolene Complexes: Structural and Electronic PropertiesReizo KatoView Author Information Condensed Molecular Materials Laboratory, RIKEN (The Institute of Physical and Chemical Research), 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan Cite this: Chem. Re…
We prepared ZnO nanostructures using chemical and thermal evaporation methods. The properties of the fabricated nanostructures were studied using scanning electron microscopy, x-ray diffraction, photoluminescence, and electron paramagnetic resonance (EPR) spectroscopy. It was found that the luminescence in the visible…
The high catalytic activity of gold clusters on oxides has been attributed to structural effects (including particle thickness and shape and metal oxidation state), as well as to support effects. We have created well-ordered gold mono-layers and bilayers that completely wet (cover) the oxide support, thus eliminating…
the new CCP14 PDRA, replacing Lachlan Cranswick, who left in March 2003 to take up a permanent position at NRC, Chalk River.The CCP14 is continuing in its efforts to provide freely available crystallographic resources and workshops to academics.Presented here is a snapshot of the continually expanding catalogue of
Bacterial DsbC proteins are involved in rearranging or reducing mismatched disulfide bonds folding within the periplasm. The X-ray structure of the enzyme from Haemophilus influenzae has been solved and compared with the known structure of the Escherichia coli protein. The proteins act as V-shaped dimers with a large…
A laser assisted zone melting process has been used to texture large Bi-2212 planar polycrystalline samples with approximate dimensions 100 mm × 10 mm × 1 mm using a high power diode laser. In this technique, the temperature of the support strongly affects the microstructure and the superconducting properties of the t…
For more than forty years, the experimental determination and analysis of electron densities have played a fundamental role in advances in the chemical bond concept. The present paper illustrates the application of this approach to the field of molecular magnetism with examples that recently appeared in the literature…
The nucleation and growth of $\mathrm{Ag}$ nanocrystals, embedded in an initially homogeneous and supersaturated $\mathrm{Ag}$-doped sodium borate glass, were studied by in situ small-angle x-ray scattering (SAXS) during isothermal annealing at different temperatures, from 813 up to 843 K. The SAXS results correspondi…
Abstract Poly( L ‐lactic acid) (PLLA: M w = 19.4 × 10 4 )/poly(ethylene glycol) (PEG: M w = 400) blend films were formed by use of a solvent‐cast technique. The properties and structures of these blend films were investigated. The Young's modulus of the PLLA decreased from 1220 to 417 MPa with the addition of PEG 5 wt…
Accurate low-order Fourier coefficients of the crystal potential of SrTiO(3) are measured by quantitative convergent-beam electron diffraction. The accuracy in the corresponding derived X-ray structure factors is about 0.1% for the strong low-order reflections (sin theta/lambda < 0.3 A(-1)). This accuracy is better th…
Abstract Two new adsorbents [β‐cyclodextrin–chitosan (β‐CD–CTS) and β‐cyclodextrin‐6–chitosan (β‐CD‐6‐CTS)] were synthesized by the reaction of β‐cyclodextrin (β‐CD) with epoxy‐activated chitosan (CTS) and the sulfonation of the C‐6 hydroxyl group of β‐cyclodextrin with CTS, respectively. Their structures were confirm…
APRV (Automatic Processing, Refinement and Visualization) is a new program that enables high-throughput batch processing of crystallographic data. The program combines processing of raw diffraction images, initial structure refinement and visual inspection of resulting electron density into a seamless one-step procedu…
The crystal structure of serine acetyltransferase (SAT) from Haemophilus influenzae Rd determined at 2.7 A resolution is presented. SAT is a member of a family of hexapeptide-containing transferases that contain six-residue tandem repeats (LIV)-G-X(4) that have been shown to form left-handed parallel beta-helices. In…
A topic of current interest is engineering surface mutations in order to improve the success rate of protein crystallization. This report explores the possibility of using metal-ion-mediated crystal-packing interactions to facilitate rational design. Escherichia coli apo acyl carrier protein was chosen as a test case…
The metal NMR parameters of the complexes [(NC)(5)Pt-Tl(CN)(n)](n -) (n = 0-3, I-IV) and [(NC)(5)Pt-Tl-Pt(CN)(5)](3-) (V), as well as [{Pt(NO(3))(NH(3))(2)L(2)}Tl(NO(3))(2)(MeOH)] (VI) and [{Pt(NO(3))(NH(3))(2)L(2)}(2)Tl](+) (VII) with L = NHCO(t)Bu, were computationally investigated by relativistic density functional…
Rasvumite, KFe 2 S 3 , belongs to a group of rare iron bearing alkali sulphide minerals together with erdite, bartonite, djerfisherite and others occurring in mafic alkaline rocks on the Kola peninsula (Russia) or Coyote Peak in California (USA) [1]. KFe 2 S 3 has been synthesized hydrothermally in microcrystalline ap…
The shadowing of the primary beam and of reflections from a powder crystal sample enclosed in a diamond-anvil high-pressure cell (DAC) is described for unrestricted data-collection procedures. The corrections account for the shadowing of the data measured with point- or area-detector diffractometers and can be applied…
Abstract PA1010/TPU blends were prepared by melt blending. The melting, crystallization behavior, and isothermal crystallization kinetics were investigated using differential scanning calorimetry (DSC). The results showed that the DSC thermograms of blend samples exhibit double melting peaks. With increasing the TPU c…
Carbon nanotubes were synthesized in an atmospheric chamber by irradiating a metal-catalyst containing graphite target with a 2 kW continuous wave CO2 laser and capturing the soot in flowing distilled water to facilitate continuous, rapid production. The ablation products, swept away by an argon flow and collected in…