Materials Literature
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Abstract A novel diphosphoheptadecatungstate complex, [(P2O7)W17O51]4− was prepared from a 200 mM (M = mol dm−3) W(VI)–10 mM P2O74−–0.6 M HCl–40% (v/v) CH3CN system, and characterized by IR, UV–vis, 31P NMR, and 183W NMR spectroscopy, and voltammetry. Single-crystal X-ray analysis was made on [(C2H5)4N]4[(P2O7)W17O51]…
A facile synthesis of 1H-isoindole-1,3(2H)-diones (3a-h) has been developed by the reaction of the corresponding anhydrides (1a-h) with potassium cyanate (4a) or sodium thiocyanate (4b).The reactions were carried out in neutral media under reflux or under microwave irradiation without use of catalyst.Good to excellent…
Rheology studies, on aqueous gelatin gels, were performed below gelation temperature (T g ≈ 28°C) in the temperature range, T= 5-25°C as a function of NaCl concentration (0.01-0.1M). In the low frequency domain and at a given temperature, both the storage (G') and loss (G) modulii exhibited power-law frequency depende…
This paper estimates the radioactive graphite dispersion on the land surface (forest litter and soil) as a result of the Chernobyl Nuclear Power Plant (NPP) release. Graphite mass was calculated using an estimated average concentration of 2.5 × 10 7 Bq/kgC (carbon). The sample collection method, sample origin and its…
Hardness of coke texture and elemental structure including coke matrix and pore was measured by micro Vickers test and Brinel test respectively. Vickers hardness of coke depends only on coke texture. Isotropic and Mosaic texture, which are derived from reactive of low rank coal, have largest hardness and Leaflet textu…
The swelling behavior of a softening coal particle during carbonization was numerically analyzed. In this study, since the swelling of a coal particle was caused by the growth of bubbles in the coal particle, the bubble growth due to the inflow of volatile matters to the bubbles was calculated involving nucleation, co…
硅藻转换函数的研究为湖泊环境指标的定量重建提供了有效途径．在长江中下游45个湖泊水质和表层沉积硅藻调查的基础上,利用典型对应分析方法开展了表层硅藻与营养态指环的关系研究.15个水质指标中总磷解释了硅藻数据的最大变率,是影响硅藻种群分布的最重要最显著的环境变量．通过对不同加权平均回归方法的比较,选择了反向还原加权平均回归与校正方法建立了研究区硅藻-总磷转换函数模型．依据刀割法统计检验,该模型提供了较低的推导误差(RMSEP<sub>jack</sub>=0.157)．在删除异常样品后,该硅藻-总磷转换函数的推导能力明显增强,实测值与推导值的回归相关系数大大提高(R<sup>2</sup><sub>jack</sub>=0.82),推…
Clothing comfort involves three potential independent factors,i.e.,thermal moisture comfort,tactile comfort and pressure comfort.Being a component of the entire comfort of clothing,pressure comfort plays a positive effect. From the medicinal viewpoint,it is obvious that excessive clothing pressure will be harmful to h…
Twenty-three woolen, mixed and worsted woven fabrics made of wool, polyester/ wool, polyester/cellulosic and waste fibers underwent four different finishing treatments. The effect of the finishing on gray goods was studied by comparing the structural parameters and the results obtained by compressive and cyclic multia…
This paper proposes a reference frame transformation method which applies appropriate rotational operators to the block diagram representation of a converter space vector model to transform it from one reference frame to another. Unlike reference frame transformation using matrices, it can easily be applied to convert…
IT IS AN HONOR TO REVIEW AND UPDATE THIS chapter on thermal properties, originally written in 1965 by L. J. Mitchell, a supervisory engineer with the Bureau of Reclamation, Denver, Colorado, and later updated by J. A. Rhodes, who retired in 1980 as chief of the Concrete Branch, Office Chief of Engineers. John Scanlon…
Producing continuous, conductive diamond film on titanium is critical to using this metal for electrochemical electrodes, bipolar current collector plates in fuel cells, and prosthetic implants. A common problem with coating polycrystalline diamond on titanium is the stress-cracking that results from the difference of…
This article describes the inelastic scattering effect in surface electron spectroscopies such as XPS and AES. In order to improve the accuracy of quantitative surface analysis, it is very important to describe the attenuation rate of the electron signal due to inelastic scattering events in a solid. For this, “attenu…
Abstract Surface enhanced Raman spectroscopy (SERS) of NO on cold‐deposited Cu yields only bands of the dissociation products of NO, but not the stretching bands of NO. In contrast, infrared reflection‐absorption spectroscopy (IRRAS) on similarly prepared samples displays strong NO stretching bands and only a very wea…
The effect of ambient inlet air pressure variations on the compressor performance in a direct fired solid oxide fuel cell gas turbine hybrid power system has been studied using the Hybrid Performance (Hyper) project hardware simulation facility at the U.S. Department of Energy, National Energy Technology Laboratory (N…
The mechanism of membrane interaction by beta-sheet peptides is important to understand fundamental principles of folding of beta-barrel proteins and various beta-amyloid proteins. Here, we examined the conformational characteristics of a porin-like channel forming (xSxG)(6) peptide in solution and membrane-mimicking…
This investigation describes the synthesis and formation of the second phase of high-density arrays of vertically aligned ZnO:Ga nanowires on ZnO/glass substrates at 600°C. As the concentration of the Ga is increased, the nanowire became shorter without any change in its diameter. The formation of the second phase, Zn…
The so far unknown lead tricyanomethanide, Pb[C(CN) 3 ] 2 , was obtained from a saturated aqueous solution of PbCl 2 and solid AgC(CN) 3 . Its IR spectrum and thermal behaviour are described. The crystal structure was determined by single-crystal X-ray diffraction (trigonal, P31m, Z = 3, a = 1414.4(5), c = 409.02(6) p…
Quantitative structure property relationships were proposed to calculate the binary interaction terms of the Jouyban-Acree model using coefficients of Abraham solvational models. The applicability of the proposed methods for reproducing solubility data of anthracene in binary solvents has been evaluated using 56 solub…
Compounds of the formula Na8[Si(6 +y)Be(y)Al(6 - 2y)O24]X2, with X = Cl and Br, and y = 1, 2 and 3 have been synthesised and structurally characterised by combined powder X-ray and neutron diffraction profile analysis. These materials adopt the sodalite framework (SOD) with the tetrahedral species, BeO4, AlO4 and SiO4…