Materials Literature
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Abstract Linearly-polarized-light-induced optical anisotropy of a thin film of polymethacrylate with p-cyanoazobenzenes side chains is enhanced at elevated temperatures to display anomalously high stability toward heat and light.
Abstract— Fluorescence emission from merocyanine 540 (MC540) dimers was observed in dipalmitoylphosphatidylcholine (DPPC) vesicles. This unusual behavior was observed only for vesicles in the gel‐phase state. No dimer fluorescence was observed either in monopalmitoylphosphati‐dylcholine (C 16 PC) micelles or in liquid…
Calculations of atmospheric showers initiated by cosmic rays were carried out using the FLUKA Monte Carlo code. The fluences of various secondary particles, scored at different heights in the atmosphere and at different geomagnetic latitudes, have been converted to effective dose and ambient dose equivalent by means o…
Experimental solubilities are reported for diphenyl sulfone dissolved in 8 alkane, 10 alcohol, and in aqueous solvent media at 25°C. Results of these measurements are used to test the predictive ability of the general solvation model log C A,org sat /C A,aq sat = c + rR 2 + sπ 2 H + aΣα 2 H + bΣβ 2 H + vV x where C A,…
Threshold stress in constant load tests and critical stress in constant strain tests for sulfide stress corrosion cracking (SCC) of seven tubular steels were measured. Percent reduction in area loss caused by SCC of four tubular steels also were measured. Results showed there was no interrelationship among the three p…
book review: Selden, P.A. (Hrsg.): Porceedings of the 17th European Colloquium of Arachnology. Edinburgh 1997
This paper considers the objective evaluation of seam puckering on three-dimensional garments. In order to simulate garment surfaces in three dimensions, seamed samples are supported on five different surfaces: plane (both with and without tilt) and curved (both convex and concave). A set of five samples having seams…
The evolution of the brilliance of synchrotron radiation sources has allowed combined functionalities of beamline optics for simultaneous high intensity, rapid tunability and narrow wavelength bandpass. This then combines the chance to measure protein crystal diffraction data at multiple wavelengths for optimized anom…
Three types of tetraazamacrocycles (1,4,8,11-tetraazacyclotetradecane, 1,4,8,12-tetraazacyclopentadecane, and 1,4,8,11-tetraazacyclotetradecane-5,7-dione) are grafted on the surface of phosphorus-containing dendrimers possessing P(S)Cl2 end groups (for generations 1 and 3: this corresponds to three and twelve macrocyc…
Oxygen diffusion is treated in a dense electronically conducting cobaltate pellet blocked ionically on one surface, electronically on the other, and sealed on its cylindrical periphery. A procedure is developed for extracting the chemical diffusion and surface exchange coefficients for oxygen by use of the asymptotic…
The generation of double kinks in sessile screw dislocation cores is a highly nonlinear process but is the rate-controlling step for plasticity at low temperatures. In this work, double-kink generation in threefold screw dislocations in bcc crystals is studied within the framework of the Peierls-Nabarro (P-N) model in…
The synthesis together with mechanical property and rheological characterization of novel star–block copolymers comprising multiple polystyrene (PSt)-b-polyisobutylene (PIB) arms emanating from polydivinylbenzene (PDVB) cores are described. The synthesis strategy involved the preparation of PSt-b-PIB-Clt (i.e., dibloc…
Methacrylate-based copolymers with 2-hydroxyethyl methacrylate and 2,3-epoxypropyl methacrylate, respectively, were synthesised and investigated as costabilisers for PVC. It was found that these polymers are capable of improving the induction time of PVC dehydrochlorination. This costabilising effect is dependent on t…
The impedance response of poly( o ‐toluidine) (POT) electrochemically grown films was investigated in sulfuric acid 3.7 M, in the temperature range 218 to 293 K. The Nyquist diagrams as a function of temperature show that the transition potential from the nonconductive to the conductive state shifts in the positive po…
The introduction of rare-earth permanent magnets based on samarium-cobalt in about 1970, and neodymium-iron-boron magnets in the mid-nineteen eighties, has ushered in a new era in hard magnetic materials. This has resulted in a dramatic improvement in permanent magnet performance, with neodymium-iron-boron (Nd 2 Fe 14…
The crystal growth, structure and Raman spectra of the PrxY1−xAl3(BO3)4 (PYAB) single crystals are introduced. The experiments show that the characteristic lattice vibrational spectrum of the PYAB arises mainly from the internal vibrations of the BO3 and AlO6 groups, and that the rigidity of the lattice is mainly ascr…
We have used atomistic molecular-dynamics simulations to model the detailed molecular configuration of 5CB (4-n-pentyl-4'-cyanobiphenyl) molecules in the form of a nanoscopic liquid crystal droplet in a vacuum microgravity environment. We find the equilibrium state of droplets consisting of as few as 26 or 50 molecule…
Plates of polyethylene with ultrahigh molecular weight (PEUHMW) were treated by radiofrequency capacitive CF4 plasma discharge in order to incorporate fluorinated functional groups. The consequences of subsequent heating treatments after fluorination were investigated by the combined use of angle-resolved XPS characte…
The tetragonality of small zirconia particles has been established by accurately measuring the tetragonality ratio ( c/a ) of decomposed zirconyl hydroxide, which was then calcined over a range of temperatures to produce a range of average‐sized zirconia crystallite particles. The zirconia initially crystallized as a…
Abstract Remarkable luminescence of neodymium ion (Nd(III)) complexed with 8-quinolinol derivatives containing halogen atoms was successfully observed in organic solution under visible light irradiation via photosensitization. Introduction of halogen atoms in the ligands led to enhancement of the luminescence.