Materials Literature
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The response of archaea to changes in external NaCl is reviewed and compared to what is known about osmoadaptation and osmoregulation in bacteria and eukaryotes. Cells placed in altered external NaCl exhibit short term and long term responses. The earliest events are likely to be water movement through aquaporin-like…
The paper presents recent work on ferromagnetic NiMnGa films sputter deposited on silicon cantilever substrates. The films are partially crystalline if the substrate is held at room temperature (RT) during the deposition. They become fully crystalline after annealing at 400°C. The internal friction (IF) of the RT depo…
The synthesis, X-ray crystal structures and magnetic properties of the 1-D polymeric coordination compound MnII(NITpPy)4[N(CN)2]2 (NITpPy = 2-(4-pyridyl)-4,4,5,5-tetramethylimidazoline-1-oxyl 3-oxide) are reported. In the crystal structure the [MnII(NITpPy)2]2+ units are linked by N(CN)2− μ-bridging ligands to form on…
Recent works on perpendicular recording media were reviewed, Co-Cr alloy films are still under improvment and show a recording ability of 20 Gbit/in/sup 2/ and beyond. New perpendicular recording media that have high perpendicular anisotropy have been developed. These would be candidate media for ultrahigh density rec…
In crystals of [FeII(N3)2(pyz)]n (pyz = pyrazine), two adjacent Fe2+ ions are bridged via two μ-1,1-N3− ligands along the c axis to afford ferromagnetically coupled linear chains, which are bridged via μ-pyrazine ligands along the b axis to afford 2-D antiferromagnetically coupled layers; these competitive magnetic co…
Mesostructured films deposited on glass substrates by spin coating are studied by X-ray diffraction, small angle X-ray scattering using grazing incidence (GISAXS) and high resolution electron microscopy. The films generally present a gradient of ordering from the air/sol interface to the interior of the film, with a 3…
We report the latest release (version 1.6) of the CATH protein domains database (http://www.biochem.ucl. ac.uk/bsm/cath ). This is a hierarchical classification of 18 577 domains into evolutionary families and structural groupings. We have identified 1028 homo-logous superfamilies in which the proteins have both struc…
We propose a theory for the phase transitions in materials made from natural fibers. At heating, the theory predicts structural phase transitions of the first order. The normalized thermodynamical characteristics show the universal behavior of a scaling law, which is unusual for first order phase transitions The scali…
In the recent decade, the most useful drug for the therapy of colon cancer is 5-Fluorouracil(5-FU). It has been reported to have considerable toxicity administered by intravenous injections or via alimentary treat. Though many materials have developed for drug carrier of 5-FU, there was no clinically acceptable carrie…
Measurements of hysteresis loops, initial magnetization curve and families of differential permeability curves were made on a series of 0.05 and 0.1 wt.% C Fe-C samples subjected to fatigue under load control. Preisach-like functions were calculated using the permeability data. Based on these functions a new parameter…
This article reports on an investigation into how the morphology of four commercially available ethylene propylene diene monomer (EPDM) elastomers was affected by exposure to a brake fluid. The sorption and diffusion coefficients as a function of carbon-black content as well as the EPDM type were determined at 23°C, 6…
It is well known that the difference in the coefficient of thermal expansion of the components of titanium matrix composites with the SCS-6 SiC-fiber gives rise to substantial residual stresses. Due to the fact that the fiber/matrix bond strength is low (as long as there is still a substantial thick carbon protection…
The reaction between iron oxides and iron‐carbon melts was studied in the temperature range 1523–1973 K. Pellets made from three different sources of iron oxides were added onto the melt surface, and the reaction time was measured through the constant volume pressure increase (CVPI) method. The effects of reaction tem…
Oxynitride deep-ultraviolet antireflective coating (DARC) of Si wafers is used to get better lithography at 248 nm. The thickness and the optical parameters of these films have to be optimized to get good and reproducible results. In this context, DARC layers with different N2O flows have been processed and characteri…
The application of surfactants in daily life increases due to a large number of useful applications in industries and pharmaceuticals. The synthesized copper soaps and their urea and benzothiazole complexes have been confirmed by IR, NMR spectral analysis. The antifungal activities of copper soaps derived from mustard…
The electronic structure of PbWO4 crystal is studied with the relativistic self-consistent discrete variational embedded cluster method in the framework of density functional theory. The results show that the valence band is mainly made up of O2p with a certain amount of W5d component, and the conduction band is mainl…
Core-extended perylenetetracarboxylic bisimides were prepared by Diels-Alder reaction followed by reduction, or by nitration followed by cyclisation. Highly fluorescent dyes were obtained with absorption regions from the visible to the NIR. Applications for solar energy harvesting, and quantum counters were suggested.
Air was gradually supplied through a small vertical hole to form a single bubble on the upper surface of a horizontal flat plate of poor wettability. The bubble grew with an increase in the supplied air volume. The growing behavior of the bubble was observed with a CCD camera. The shape and size of the bubble on the u…
Wilhelmy technique was used to measure the single fiber advancing contact angle of AKD and ASA sized pulp fibers. When sizing performance was fully developed, the advancing contact angle of AKD sized pulp fiber was 85°, while the ASA sized pulp fiber was 95°. Waterdrop absorption measurement also indicated that ASA wa…
NdFeB sintered magnets with the addition of Ag were prepared by blending hydrogen decrepitated NdFeB powder with Ag powder during ball milling. It was found that small additions of Ag powder increases the coercivity of the magnets without reducing the remanence. A microstructure study showed that oxygen content in the…