Materials Literature
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The crystal structure of the perovskite Sr 2 FeTaO 6 has been refined by simultaneous analysis of X-ray and neutron powder diffraction data collected at 280 K; space group Pbnm, a=5.6204(3), b=5.6161(3), c=7.9266(3) Å. The structure is of the GdFeO 3 type, with a disordered distribution of Fe and Ta over the six-coord…
The effect of a tramp element Cu on the hot workability of steels was investigated in this paper. The number of surface cracks occurring in the specimens which were tensile-deformed after oxidized was measured to assess the effect of small amounts of Cu (0.3 %) and Ni (0.15 %) on hot workability. The microstructure of…
Образование Рё СЂРѕСЃС‚ углеродных наноструктур — фуллеренов, наночастиц, нанотрубок Рё РєРѕРЅСѓСЃРѕРІ, Лозовик Р®.Р•., РџРѕРїРѕРІ Рђ.Рњ.
1. Magnetostatic phenomena 2. Magnetic measurements 3. Atomic magnetic moments 4. Macroscopic experimental techniques 5. Magnetic disorder 6. Ferromagnetism 7. Antiferromagnetism and ferrimagnetism 8. Magnetism of metals and alloys 9. Magnetism of ferromagnetic oxides 10. Magnetism of compounds 11. Magnetism of amorph…
The title polymers 1 and 2 are synthesised via precursor polymers assembled by organometallic couplings using a Diels–Alder adduct of 2,6-dibromoanthracene.
Acetobacter xylinum produces both cellulase and bacterial cellulose, but some report believed that this cellulase activity does not decrease the degree of polymerization (DP) of bacterial cellulose during cultivation. A. xylinum subsp. sucrofermentans BPR2001 produces two enzymes that hydrolyze CM-cellulose and cellot…
Organic compounds in aqueous solution submitted to an ultrasonic irradiation behave differently according to their physical and chemical properties. In this work, degradation rate of phenol and carbon tetrachloride, has been studied at different frequencies, 20 kHz, 200 kHz, 500 kHz and 800 kHz. Whatever the frequency…
The {001}<210> texture, which is preferable for good magnetic properties in non-oriented electrical steel, is enhanced by the two-stage cold rolling method in which the intermediate annealing temperature is 640°C. The mechanism of {001}<210> texture development by two-stage cold rolling method was investigated by the…
Simulated ozone decomposition profiles in “pure” water were made using two analytical kinetic ozone decomposition models and contrasted with experimental and literature data. Fundamental and applied applications of ozone consumption models are presented, demonstrating the importance of both direct and indirect oxidati…
Strontium barium niobate, Sr0.6Ba0.4Nb2O6 (SBN40) ceramics were prepared by the mixed oxide route; specimens sintered at 1300 °C–1450 °C for 2–4 h had densities of ∼95% theoretical. The use of “conventional’’ conditions (1300 °C; ∼200 °C below the melting temperature) gave rise to a duplex structure comprising a mixtu…
New dendritic metallophthalocyanines are prepared on the basis of Newkome’s divergent-growth approach; the number of generations within the dendrimer is found to affect the aggregation behaviour of the zinc(II) phthalocyanine moiety which forms the interior core of the dendrimers.
New hydrotalcite-like anionic clays containing Zr4+ in the brucite-like layers are synthesised by a simple coprecipitation technique; these materials show very interesting properties as catalysts for liquid-phase hydroxylation of phenol with H2O2.
The effect of melting behaviour on upward flame spread of thermoplastic materials when subjected to small ignition sources and considered to suffer no external flux was studied using large-scale tests. For moderate fire conditions the cone calorimeter was utilized, with the sample set in a vertical orientation to stud…
Layered double hydroxides (LDHs) containing Mg 2+, Al 3+, and Y 3+ in the brucite-like layers and with carbonate as counteranion have been prepared following the coprecipitation method at constant pH. The Al/Y ratio depends on the concentrations in the starting solutions. The crystallinity of the layered materials dec…
Various methods of characterizing insulating materials by their ability to take up charge, retain it, and release it, are reviewed critically in search of measurable quantities that could be used to predict material behavior under stress up to failure conditions. Space charge characterization data on different types o…
We used the mouse air pouch model of inflammation to study the interaction between cytokines, prostaglandin E(2) (PGE(2)) and cell migration during the various phases of acute local inflammation induced by carrageenan. In serum, the levels of interleukin 1 (IL-1), interleukin 6 (IL-6), tumour necrosis factor (TNF), se…
Colloidal gold nanoparticles in toluene solution, synthesised using a two-phase liquid/liquid system, display second harmonic generation, wavelength analysis of which indicates the narrow frequency band of the gold surface plasmon for nanoparticles present at the air/toluene interface.
Diffuse reflectance Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, scanning Auger microscopy, elemental analyses, BET surface area, and thermogravimetric analyses have been used to study metals and adsorbed organics on the surface of metal-loaded activated carbon materials. Metals such as c…
The SAE Fatigue Design Handbook covers, in a single source, current technologies and procedures on all of the major elements of fatigue design. Intended as a handbook for industrial use, this book describes the major elements of the fatigue design process and how those elements must be tied together in a comprehensive…
The attachment of high‐quality amorphous diamond (a‐D) coatings has been studied with respect to the hardness of the underlying layer. A novel intermediate‐layer technique is reported that enables thick a‐D coatings to be deposited successfully on all solids at room temperature. The Figure shows an a‐D film, on a 1.2…