Materials Literature
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True stress (σ)–true strain (ε) curves were calculated by using the Kocks–Mecking (KM) model for the ferrite–cementite steels with various ferrite grain sizes between 0.47 and 13.6 μm. In the KM model, the effect of ferrite grain size on flow stress is described by the athermal stress component that follows the Hall–P…
最初に，ステンレス鋼の不働態皮膜の厚さ，組成，伝導形式，バンドギャップ，インピーダンス軌跡などに関する最近の成果を通覧し，皮膜の状態の電位による変化を明らかにする．ついで，不働態皮膜の厚さと組成を模擬した人工不働態皮膜の電気化学的性質について紹介し，この皮膜の電気化学的性質に基づいて不働態皮膜の塩化物孔食に対する防食能力について考察する．最後に，不働態皮膜を更に良く理解するために，幾つかの将来の課題を提案する．
Rayon fiber (RN) and pine wood fiber (PW) filled polypropylene (PP) compounds, PP/RN (90/05 and 75/25 wt%) and PP/PW (90/05, 75/25 and 50/50 wt%), are investigated for their interfacial adhesion, rheological properties, morphology, nucleation and mechanical properties. The interfacial adhesion of the RN-filled PP comp…
Three sets of data covering the 2004-2007 period are examined: two beryllium-7 series and ozone measured in ground level air. The measuring sites are at three different locations in Belgrade, Serbia. The temporal evolution of beryllium-7 and ozone is presented, as well as their mutual correlations. Beryllium-7 data fo…
The problem of re∞ection and transmission of plane electromagnetic waves in a periodic multilayered structure containing double-negative (DNG) media is analyzed using a matrix formalism. A Lorentz model with a single resonance is used to describe the dispersion of the DNG medium. It is shown that the introduction of l…
We have investigated the potential of the dithiolane ring to anchor organic compounds on the surface of CdSe–ZnS core–shell quantum dots. In particular, we have synthesized three monomeric ligands, incorporating an azobenzene chromophore and a single dithiolane anchor in their molecular skeleton, as well as a polymeri…
We describe a straight forward procedure that allows an easy purification, an efficient solubilisation and, if desired, a controlled cutting of carbon nanotubes. The method uses aqueous solutions of phosphomolybdic acid combined with ultrasound, leading to the adsorption of phosphomolybdate on the nanotubes. This gene…
Abstract Simple phenylthiourea compounds are known for their high solubility in alkaline medium and for good corrosion control. The monomer N ‐(4‐hydroxy‐3‐methoxybenzal)‐ N ′‐(4′‐hydroxyphenyl) thiourea was condensed with pimeloylchloride and azeloylchloride through inter‐facial polycondensation method to synthesize…
This paper reports on the hairiness reduction of polyester yarns at winding using air-nozzles. Three yarns of the same count were spun each from fibres of 1.0, 1.2 and 1.4 deniers respectively. Using a CFD (computational fluid dynamics) model, airflow inside the nozzles is simulated to explain the role of nozzle param…
Using first-principles calculations, we have studied successive adsorption of hydrogen atoms on a sp2-bonded boron nitride graphitic sheet. Our calculations show that clustering proceeds through the creation of contiguous H-H orthodimer structures stabilizing the H adsorbate cluster on the BN(0001) surface, leading ev…
A commercial alumina nanopowder has been applied to prepare high density alumina ceramic specimens using a simple slip casting method. Slurry preparation process is one of important steps to enhance density and optical property of alumina specimens to be fabricated. In this work, the effect of the amount of ammonium s…
A despolimerização do poli (tereftalato de etileno) - PET pós-consumo, em solução aquosa 7,5 mol.L-1 de hidróxido de sódio foi testado a 100 °C e a 1 atm, com objetivo de obter o ácido tereftálico. O efeito de tensoativos e da concentração da solução sobre o rendimento da despolimerização foi estudado quantitativament…
film phosphors have potential applications as red components in flat display and lighting devices. In this study, we investigated the parameters affecting the internal extraction efficiency and thickness of film phosphors with a view to optimizing their brightness. film phosphors were grown on both quartz and sapphire…
From leather science, a deeper understanding of the theoretical basis of the tanning mechanism has unified the inorganic and organic chemistries of leather making processes. The 'link-lock' mechanism provides an explanation of present reactions and a tool for future developments. The question now posed is: where does…
A conceptual design study for a pyroprocesing facility, has been carried out in this study, which is available for the recovery of uranium and transuranic elemental group(TRU), that is, reusable as a nuclear fuel especially in a next generation-type reactor. The scale of this facility has been chosen as 20 kg HM/batch…
Partitioning and/or transmutation (PT) technology affects the disposal concept of high-level radioactive waste (HLW). We studied how cooling in the predisposal storage period may affect the design of the emplacement area in a repository for radioactive wastes produced by a light-water-reactor nuclear system that uses…
International audience
Diverse carbaporphyrinoid systems have been synthesized using ‘3 + 1’ MacDonald condensations, LindseyRothemund reactions and other strategies. In common with the N-confused porphyrins (NCPs), these compounds have a CNNN core that can facilitate the generation of organometallic derivatives. Benzocarbaporphyrins and tr…
The seismic isolation effectiveness,such as displacement,equivalent horizontal stiffness,max-restoring force,dissipation per loop and equivalent damping ratio of the SMA strands-composite bearing is analyzed and compared with laminate rubber bearing,through the results of the shaking table test on them.Thus the author…
Leather processing is associated with the employment of many kinds of chemicals which may be used to excess. As a result, a part of the chemicals inevitably remain in the tannery wastewater and form major pollutants. Biological treatment plays a significant role in removing these chemicals from wastewater and biodegra…