Materials Literature
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Packende Verbindungen! Zwei Monomere eines bZIP-Proteins wurden an den basischen Bereichen über eine photoempfindliche Azobenzoleinheit zu einem Homodimer verknüpft. Dieses Dimer kann nach Bestrahlung mit Licht geeigneter Wellenlänge isomerisiert werden, wobei die beiden Isomere mit einer geringen (trans) oder hohen A…
Low concentrations of short chain aliphatic alcohols and organic acids and bases suppress single-bubble sonoluminescence (SBSL) in water. The degree of SL quenching increases with the length of the aliphatic end of the alcohol, and is related to the concentration of the alcohol at the bubble/water interface. The light…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation J. J. Feng, G. Sgalari, L. G. Leal; A theory for flowing nematic polymers with orientational dist…
Neutron Diffraction Studies of Pb(ZrxTi1-x)O3 Ceramics, Johannes Frantti, Johannes Frantti, Jyrki Lappalainen, Jyrki Lappalainen, Sten Eriksson, Sten Eriksson, Vilho Lantto, Vilho Lantto, Shigeru Nishio, Shigeru Nishio, Masato Kakihana, Masato Kakihana, Sergey Ivanov, Sergey Ivanov, Håkan Rundlöf, Håkan Rundlöf
The interaction of dioxygen with various tetrahedral aluminum alkyls, (tBu)3Al.OEt2 (1), tBu2Al(mu-OtBu)2AltBu2 (6), (tBu)2Al(mesal) (2) [mesal=methyl salicylate anion], R2Al(mu-pz)2AlR2 [pz=deprotonated pyrazole, R= Me (3a), Et (3b), and tBu (3c)], R2Al(mu-3,5-Me2pz)2AIR2[3,5-Me2pz = deprotonated 3,5-dimethylpyrazole…
We present explicit calculations of the dependence of the inelastic electron mean free path on spin direction and energy, for propagation in the bulk of the ferromagnetic metals Fe and Ni. The substrate electrons are modeled within the framework of an empirical tight-binding description of the $3d,$ $4s,$ and $4p$ ban…
A new model for analysing the temperature evolution of anisotropic displacement parameters (ADP's) is presented. It allows for a separation of temperature-dependent from temperature-independent contributions to ADP's and provides a fairly detailed description of the temperature-dependent large-amplitude molecular moti…
The gasochromic mechanism in amorphous tungsten oxide films has been investigated using Raman scattering measurements. The Raman spectra of as-deposited films show two strong peaks at 770 and 950 cm−1 due to vibrations of the O–W6+–O and W6+=O bonds, respectively. When the Pd/a-WO3 films are gasochromically colored by…
Crystalline polygermyne—a new compound consisting of H-terminated germanium double layers (see Figure) stacked to form a three-dimensional crystal—is reported to have been produced by the topochemical transformation of epitaxial thin CaGe2 films at –30 °C. Polygermyne is found to exhibit strong near-infrared photolumi…
The generation of stress in magnetron-sputtered undoped and aluminum-doped zinc-oxide (ZnO:Al) films has been measured by an in situ technique. Radio-frequency magnetron sputtering from ceramic targets in an argon atmosphere was used for film deposition. The stress was measured by optically detecting the deflection of…
Ecoregional differences in geology and hydrology may affect physical and chemical conditions in streams and, consequently, the species composition of algal assemblages. Stresses resulting from human disturbance, however, may constrain species membership in algal assemblages and reduce regional diversity. We expected t…
A new strategy for the simultaneous modeling of molecular weight distribution (MWD) and degree of branching distribution (DBD) for such branched polymers as bimodal low-density polyethylene is presented, based on the Galerkin h−p finite element package P redici, a commercial code. The key problem of how to address a b…
The nucleation of calcium phosphate crystals from a weakly supersaturated calcium phosphate solution on the surface of polyelectrolyte multilayers was investigated in dependence on the chemical nature of the outermost layer. Scanning angle reflectometry was used to follow in situ the initial stages of the nucleation k…
A series of azobenzene-containing side chain liquid crystalline polymers with various spacer lengths ( p X MAN, where X, the number of methylene units, varies from 4 to 12) have been synthesized and characterized. Phases and aggregation have been studied by UV−visible spectroscopy as a function of temperature. Polariz…
Male 5-week old ICR mice were examined for the effect of feeding silk protein, sericin on colon carcinogenesis. In experiment 1, mice were fed the diets supplemented with 1.5% or 3% sericin for five weeks, and given weekly injections of 1,2-dimethylhydrazine (DMH) for the initial three weeks. Supplemental sericin caus…
Static and molecular dynamics simulations have been used with different types of interatomic potentials to investigate the structure, properties and stability of self-interstitial atom (SIA) clusters produced during irradiation. In α-iron (Fe), faulted clusters of <110> dumbbells are unstable for all the potentials. T…
Proline residues are known to perturb the structure of helices by introducing a kink between the segments preceding and following the proline residue. The distortion of the helical structure results from the avoided steric clash between the ring of the proline at position (i) and the backbone carbonyl at position (i -…
X-ray radiation damage of a lysozyme single crystal by an intense monochromatic beam from a third-generation radiation source at the Advanced Photon Source has been studied. The results show that primary radiation damage is linearly dependent on the X-ray dose even when the crystal is at cryogenic temperatures. The ex…
Diamond is an exceptionally radiation-hard material, but the main mechanisms by which lattice damage results from irradiation of high-energy particles and photons are not well understood. Models of radiation damage in diamond have been built up for both electron and gamma irradiation using Monte Carlo computer simulat…
The electronic structure of carbon nitride $({\mathrm{CN}}_{x})$ film produced by low-energy ion implantation has been studied by N 1s near-edge x-ray-absorption fine structure (NEXAFS). The NEXAFS spectra of ${\mathrm{CN}}_{x}$ film have shown three sharp ${\mathrm{\ensuremath{\pi}}}^{\mathrm{*}}$ and one broad ${\ma…