Materials Literature
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Calcification limits the long-term durability of xenograft glutaraldehyde (GA)-crosslinked heart valves. Previously, a study in rats showed that epoxy-crosslinked heart valves reduced lymphocyte reactions to the same extent as the GA-crosslinked control and induced a similar foreign-body response and calcification rea…
An array of 10 µm sized microlenses was fabricated from the adhesion of a silicasol on a polysilane film patterned by UV-light irradiation. This was achieved by increase in wettability to the aqueous sol–gel solution induced by the UV-photodecomposition of polysilane. By simply soaking the UV-patterned polysilane film…
Research Article| January 01, 2001 Simulating the Crystal Structures and Properties of Ionic Materials From Interatomic Potentials Julian D. Gale Julian D. Gale Department of Chemistry, Imperial College of Science, Technology and Medicine, South Kensington, London, SW7 2AY, U.K. Search for other works by this author o…
The influence of the surface topography of aluminum alloy (Al) on the heterogeneous nucleation of isotactic polypropylene (iPP) at the iPP/Al interface has been investigated using a polarized optical microscope (POM) with a hot stage. Different textures of the Al surface were prepared by electrochemical processes, inc…
The simple salt CuCl2·2H2O, and the new Cu-substituted polyoxometalate (POM), Na7[CuCoW11O39]·5H2O 1 are highly efficient catalysts for the oxidation of ascorbic acid by peroxynitrite.
A single crystal of a Ti–51Ni (at%) alloy was grown by floating zone method, and Ti3Ni4 precipitates of a single variant were formed coherently to the matrix by aging treatment under a compressive stress applied along the [111] direction. By using this single crystal, two-way (all-round) shape memory property was inve…
Two new compounds, 3-O-beta-D-glucopyranosyl-3 beta, 15 alpha-dihydroxypregn-5-en-20-one (1) and (-)-secoisolariciresinol-O-alpha-L-rhamnopyranoside (2), along with six known compounds (3-8), have been isolated from the aerial parts of Rubus amabilis Focke. The structures of the new compounds were elucidated mainly by…
Nylon 6.6 microfibres are now commonly produced. During dyeing, these microfibres appear to be more accessible to both acid and disperse dyes, than thicker fibres. This phenomenon is enhanced with the use of small dye molecules. In this paper, the mechanism of fixation of disperse dyes is shown to be due to adsorption…
In the field of chemical engineering separation processes, such as extraction or distillation of heteroazeotropes, severe problems exist in phase separation of oil/water dispersions containing very small droplets. This is expecially true if the bulk phases contain surfactants stabilizing the interface and thus inhibit…
Surface reactivity toward H2 and CO using a pulse method was investigated for Al2O3, In2O3–Al2O3 and Ga2O3–Al2O3. It was found that reduction by either CO or H2 and reoxidation by O2 occurred reversibly on In2O3–Al2O3. Although the surface of Ga2O3–Al2O3 was hardly reduced by H2, CO consumption and CO2 formation was o…
The dynamics and kinetics of growth-induced bending of gypsum crystals grown from solution have been studied. Crystallization was performed by the method of chemical reaction under the conditions of component counterdiffusion. It is established that autodeformation bending occurs in the [001] direction at the growth f…
In the comparison of the solidification characteristics of supercooling directional solidification (SDS) with constrained directional solidification (DS) and with the consideration of the inheritance of supercooled melt, the SDS technique established with the combination of melt supercooling and traditional DS was pro…
This study presents a viable method for the scouring and dyeing of polyester fibers (polyethylene terephthalate, PET) by using supercritical carbon dioxide as a mdeium. Scouring of the PET fibers was carried out at pressures ranging from 96 to 350 bar and at temperatures ranging from 313 to 393 K. The overall oil remo…
Voltage offset and built-in polarization were investigated in in-situ reactively sputter deposited PZT thin films on Pt, as a function of composition, doping and cooling conditions. The voltage offset increases with increasing Ti content. Hot-poling treatments show that the voltage offset originates from non-mobile de…
We have prepared novel tetraazacyclotetradecane derivatives, functionalised at nitrogen with a pendant thiophene or oligothiophene group, for electropolymerisation. Square planar Ni(II) complexes of these ligands, [Ni(L)](ClO4)2, have been prepared, and their electropolymerisation has been examined. The terthiophene-b…
We have studied the wide-range dielectric spectra of BaTiO3_δ single crystals and traced the evolution of the electronic structure of BaTiO3 with a very low oxygen vacancy concentration δ An extremely small δ can destroy the band edge and the Urbachian temperature dependence, and a so-called mid-infrared (ir) absorpti…
This title discusses direct hit technology in conjunction with a class of warheads coined near miss or direct hit warhead technology. These warheads utilize most of their entire volume and mass as damage mechanisms generating 10 to 30 times more mass deployed in the target's direction when compared to today's warheads…
Department of Electronics and computer science, Dr.B.A.M. University, Aurangabad-431004(M.S.), India(Received February 20, 2001) . aniline-dimethylsulphoxide(DMSO) aniline-dimethylformamide(DMF) dielectric rel-axation 10 MHz-10 GHZ TimeDomain Reflectometry(TDR) ! !# . dielectric parameter ( %&'…
Bulk mechanical alloying was successfully applied to solid-state synthesis of Mg2Ni, which is a promising hydrogen storage alloy. Through XRD, TEM and PCT measurement, the synthesized product was characterized to be a single-phase Mg2Ni, excluding co-synthesized MgNi2 or residuals of nickel or magnesium as in conventi…
This article provides an overview of biopolymers, classed according to their chemical structures, function and occurrence, the principles of biosynthesis and metabolism in organisms. It will then focus on polyhydroxyalkanoates (PHA) for which technical applications in several areas are currently considered. PHAs repre…