Materials Literature
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In the previous paper [2], we studied the effect of a hybrid tail on the S*c phase range of a three-ring core mesogen. It is concluded that the ether tail has a small number of contorted, but energetically favored conformers. The hybrid tail has a slightly contorted minimum energy conformation but the fluorine substit…
Measurement of the room temperature Trp triplet state lifetime in proteins by time-resolved phosphorescence can provide valuable information on the structure and dynamics of proteins in solution. Our time-resolved absorption measurements on the long-lived states resulting from electronic excitation of the chromophore…
Abstract The hydrothermal synthesis of Mg-beidellite in which limited amounts of Ga and Cr are clearly shown to be incorporated into nonexchangeable positions in the clay layer framework is reported for the first time. Elemental analyses indicate that, up to at least 15 mole percent, Ga can replace Al virtually comple…
115 mm shaped charges were fired at a constant built-in standoffs of 3 caliber against on both sides with steel plate covered glass targets from 0° to 60° NATO angles. The residual jet tip velocities and the disturbed jet regions have been analyzed from double flash X-ray pictures of the residual jet behind the target…
A new chiral hemicarboxonium salt, (ephem)(BF 4 ), was synthesized by action of α-1-((methylamino)ethyl)benzyl alcohol, (−)-ephedrine, on a carboxonium tetrafluoroborate salt. The compound crystallizes in monoclinic space group P 2 1 . a = 11.153(1) Å, b = 8.187(1) Å, c = 16.104(1) Å, β = 91.26(1)°, Z = 2. The molecul…
The thermal conductivity λ(x=0,0.15,0.3,0.6;T=2–200 K) and electrical resistivity ρ(0⩽x⩽0.5;T=6–300 K) of layered crystals Nb1−xSnxSe2 are measured in the ab plane. The metal– semiconductor transition is observed at x≈0.5. The magnitude of the resistivity anomaly observed at 33 K and associated with a transition to th…
The Ca2+-transporting ATPase has been labeled with N-cyclohexyl-N'-(4-dimethyl-amino-alpha-naphthyl)carbodiimide (NCD-4), a fluorescent carbodiimide which reacts with carboxyl groups of acidic residues. It has been reported that NCD-4 labels a transmembrane portion of the protein at the high-affinity calcium-binding s…
Promoted by the European Steel Industry under the sponsorship of ECSC, the multinational megaproject on “Scrap recycling for high quality products” aims particularly at a clear quantitative assessment of the effects of the tramp elements on the steel properties. The most relevant results gained at the two thirds of th…
Article Crystal structure of the clathrates Rb8Ga8Sn38, Rb8Ga8Ge38 and Rb8Ga8Si38 was published on April 1, 1998 in the journal Zeitschrift für Kristallographie - New Crystal Structures (volume 213, issue 1-4).
Abstract Biomaterials may be defined as artificial materials which fulfill the mechanical requirements and interact with the biosystem they are in contact with in same way as a natural material would react in the same place. While the requirements of mechanical properties can be reached by suitable organo‐polymeric an…
Abstract : Composite materials are found to lose mechanical on exposure to aircraft operating environments. This is mainly due to absorption of moisture from humid air by the matrix material. Composite materials are extensively used by the RAAF for both major structural components on the F/A-18 and for bonded repairs…
Using 58 keV (0.214 Å) synchrotron radiation we have obtained virtually extinction-free data on Al 2 O 3 . Refinement of a multipole model against these data produced deformation densities of high quality, which compare well with theoretical maps.
Article Crystal structure of tris(2,2'-bipyridine)iron(II) bis(hexafluorophosphate), (C10H8N2)3Fe(PF6)2 was published on April 1, 1998 in the journal Zeitschrift für Kristallographie - New Crystal Structures (volume 213, issue 1-4).
Core and valence band XPS spectra were obtained from a lead metal foil. The XPS data were collected with a VSW HA150 spectrometer equipped with a monochromatic Al Kα x-ray source and multichannel detector. The sample is a high purity lead foil (99.99%) that was cleaned prior to data collection by Ar-ion sputtering. Th…
Anthropometric data for the purpose of spectacle frame design are scarce in the literature. Definitions of facial features to be measured with existing systems of facial measurement are often not specific enough for frame design and manufacturing. Currently, for individual frame design, experienced personnel collect d…
Abstract Luminous properties of a red phosphor, Eu–Y2O3 (Eu-doped Y2O3) have been studied by 89Y (nuclear spin 1/2)-static NMR. Pure Y2O3 showed an anisotropic pattern with the peak centered at 299 ppm assigned to the Y atom in the site, where none of the 12 nearest neighbouring Y atoms are substituted by an Eu atom.…
Abstract Extruded thermoplastic sheet is widely used in the production of thin‐gauge tubs and containers for the food and beverage industry using the thermoforming process. The production of high quality thermoformed parts is critically dependent on the standard of extruded sheet feedstock used. The extrusion process…
Abstract A comparative study of NO and N2O decomposition over Cu/ZSM-5 and Cu/Y zeolites with various Cu loading levels has been carried out at 523—823 K. The Arrenhius plot of NO decomposition tended to level off above 773 K, as reported in the literature, while that of N2O decomposition was linear. It was noted that…
The structure and formation mechanisms of low-angle grain boundaries (LAGB) in chlorite have been investigated using HRTEM to resolve each cation sheet in chlorite. The LAGB are abundant in two hydrothermally formed ferromagnesian chlorite specimens. Abundant LAGB, which are almost parallel to (001), divide chlorite g…
The mesogenic 4,4′-bis[4-(n-octyloxy)benzoyloxy]azobenzene (HL) ligand reacts with [(PhCN)2PdCl2] to give the dinuclear cyclometalated complex [(μ-Cl)(L)Pd]2 (1), from which the mononuclear half-sandwich [(η5-C5H5)(L)Pd] (2) species has been obtained by reaction with Tl(C5H5). The PtII analogue of 2, [(η5-C5H5)(L)Pt]…