Materials Literature
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Effect of discharging frequency of low voltage pulsed magnetic field (LVPMF) on the morphology and size of eutectic Si in eutectic Al–Si (Al–12Si) alloys has been investigated, and some characteristic parameters the characterised the microstructure of the eutectic Si phase were obtained. Dry sliding wear behaviour of…
通过甲苯-2,4-二异氰酸酯(TDI)的连接作用, 利用接枝共聚法将具有储热功能的长链脂肪醇[如十八醇(C 18 OH)、 十六醇(C 16 OH)和十四醇(C 14 OH)]接枝到聚乙烯醇(PVA)主链上, 制备出储热能力不同的聚乙烯醇-g-TDI-脂肪醇[PVA-g-TDI-C( n )]梳状接枝共聚物. 通过傅里叶变换红外光谱(FTIR)、 差示扫描量热分析(DSC)、 热重分析(TGA)和X射线衍射(XRD)等方法研究了PVA-g-TDI-C( n )共聚物的热行为和结晶结构. 结果表明, PVA-g-TDI-C( n )共聚物具有良好的储热能力, 储热能力随侧链碳原子数目和侧链接枝度的增加而增大, 但明显低于长链脂肪醇的…
The solid state heats of formation (HOF) for 14 designed compounds are calculated using the Politzer approach. The gas phase HOF are predicted with the density functional theory (DFT) B3PW91/6-31 G(d, p) method by means of designed isodemic reactions. All the designed compounds possess solid state HOF above 830 kJ/mol…
Dielectric CaF2layers were introduced into Nd-Fe-Co-Ga-B green compacts which were subsequently sintered into internally segmented anisotropic magnets. Layers with the nominal area density of 0.2-0.3 mg CaF2per mm2were found to increase the electrical resistivity by two orders of magnitude while still allowing the mag…
The pyrimidine reductive catabolic pathway is important for the utilization of uracil and thymine as sources of nitrogen and carbon. The pathway is controlled by three enzymes: dihydropyrimidine dehydrogenase (DPD), dihydropyrimidinase and β-alanine synthase. The putative DPD genes, pydX and pydA, are tandemly arrange…
Abstract The effect of pro‐degradant distribution in polyethylene (PE)/starch blends on ultraviolet (UV) photo‐oxidative degradation was investigated. Two kinds of pro‐degradants, Fe and Co‐based, were used in this study. The distribution of pro‐degradants in the different phases was varied by a dual step process usin…
Hydroxyapatite (HA) coatings have been used to improve biological and mechanical fixation of metallic prosthesis. Because of extraordinary features of carbon nanotubes (CNTs), they have a lot of facilities, such as extremely strong nanoreinforcement materials for composites. HA powders were synthesized and mixed with…
Precipitation in a Mg-rich Al–Mg–Si–Ge–Cu alloy was investigated using aberration-corrected high-angle annular dark-field scanning transmission electron microscopy. The precipitates were needle or lath shaped with the longest dimension parallel to ⟨001⟩Al. The precipitates had no repeating unit cell when viewed along…
Structural and electrical properties of semicrystalline P3HT cast films onto Si/SiO(2) surface are studied during the solidification under applied electric field in lateral OFET geometry. During evaporation of the solvent, the formation of P3HT crystallites is monitored simultaneously by time-resolved X-ray diffractio…
In this study, an artificial neural network (ANN) model is presented in order to predict the tenacity and hairiness of carded cotton yarns. Fiber measurement values generated by using a high-volume instrument (HVI) and an advanced fiber information system (AFIS) were used in the ANN model as input parameters. The radi…
A current limit avoidance (CLA) system has been proposed to avoid current saturation in the poloidal field (PF) coils of the Joint European Torus tokamak when the eXtreme Shape Controller is used to control the plasma shape. CLA uses the redundancy of the PF coil system to automatically obtain almost the same plasma s…
The famous Swiss-born, Norwegian geologist and geochemist Victor Goldschmidt suggested that anorthosite could be used as a source of aluminium replacing bauxite, and acid leaching of the anorthosite was his innovative idea. Anorthosite is a rock type consisting of more than 90% plagioclase which is an acid-soluble, al…
This article reports the synthesis and characterisation of Barium titanate (BaTiO3) nanocomposite and its application as opto-electronic humidity sensor. Titanium tetrachloride and barium hydroxide were mixed in molar ratio 1 : 1 in deionised water under continuous stirring at room temperature. Later, sodium hydroxide…
An all-optical switch composed of two interacting nanoparticles in front of an optical dielectric slab waveguide is proposed. An incident optical signal is coupled to the optical waveguide after scattering by the two nanoparticles. The scattered fields interfere constructively or destructively depending on the degree…
Within this study we analyzed the degradation resistance of Chitlac both in solution and as a coating film in aqueous media upon exposure to the enzymatic attack of lysozyme or to the oxidant effect of H2O2. Possible coating degradation in such conditions was evaluated by measuring the amount of both polysaccharide an…
Six amylose-2-acetyl-3,6-bis(phenylcarbamate) (AAPC) samples ranging in weight-average molar mass M(w) from 1.8 × 10(4) g mol(-1) to 1.1 × 10(6) g mol(-1) have been prepared from enzymatically synthesized amylose samples. Static light scattering, small-angle X-ray scattering, sedimentation equilibrium, and viscosity m…
We review the major radioactive isotopes formed in nuclear reactors and consider how these were released and dispersed in the days following the Fukushima-Daiichi accident. The risk of contamination from uranium and plutonium isotopes at semiconductor manufacturing sites in Japan is discussed, and the first report of…
Lumazine synthase catalyzes the penultimate step in the biosynthesis of riboflavin, while riboflavin synthase catalyzes the last step. O-Nucleoside, S-nucleoside, and N-nucleoside analogues of hypothetical lumazine biosynthetic intermediates have been synthesized in order to obtain structure and mechanism probes of th…
The paper presents an organic-based photodiode coupled to a CsI(Tl) scintillator to realize an X-ray detector. A suitable blend of an indolic squaraine derivative and of fullerene derivative has been used for the photodiode, thus allowing external quantum efficiency in excess of 10% at a wavelength of 570 nm, well mat…
2-Phenyl-1-benzopyrylium (flavylium) and 2-styryl-1-benzopyrylium (styrylflavylium) cations establish in aqueous solution a series of equilibria defining chemical reaction networks responsive to several stimuli (pH, light, redox potential). Control over the mole fraction distribution of species by applying the appropi…