Materials Literature
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The loculate ("chambered") valve structure of centric diatoms like Triceratium favus Ehrenberg has been mentioned time and again in the nanostructure literature. Here we draw attention to the fundamentally different alternative sandwich model nature developed in the genus Pleurosigma, where it is nonloculate. This has…
The Zintl phase, Yb8Ge3Sb5 exhibits a complex lattice response and an abrupt negative thermal expansion below 15 K - subtle structural changes before and after the transition are consistent with temperature-induced electron transfer from (to) Yb 4f bands to (from) Sb 5p and Ge 4p bands.
Hydrogen peroxide in high yields can be generated with high efficiency at mild conditions (25 degrees C and atmospheric pressure) with the formation of only environment-friendly by-products (N2 and H2O) by a reduction of O2 by hydrazine from its hydrate/salt with its complete conversion in a short reaction period (<or…
The authors have been developing a newly-designed totally-implantable artificial myocardium using a covalent shape-memory alloy fibre (Biometal®, Toki Corporation), which is attached onto the ventricular wall and is also capable of supporting the natural ventricular contraction. This mechanical system consists of…
A simple fracture testing method, combined with acoustic-emission (AE) monitoring was developed in order to investigate the mechanical performance of solid oxide fuel cells (SOFCs) under simulated environment. The fracture testing method was applied to ceria electrolyte-supported single cells. The fracture damage proc…
A composite Ni-Y doped ZrO 2 ͑YSZ͒ composite was prepared by depositing a 1-50 m thick coating of YSZ particles from a colloidal suspension ͑initial YSZ particle size ϳ100 nm͒ onto a sapphire substrate followed by impregnation by Ni polymer precursors into the coating and annealing at 800°C.The electrical conductivity…
To develop biodegradable polymers with favorable physicochemical and biological properties, we have synthesized a series of poly(terephthalate-co-phosphate)s using a two-step poly-condensation. The diol 1,4-bis(2-hydroxyethyl) terephthalate was first reacted with ethylphosphorodichloridate (EOP), and then chain-extend…
Abstract The hydrated ammonium hemizinc dihydrogen diphosphate (NH 4 ) 2 Zn(H 2 P 2 O 7 ) 2 · 2 H 2 O was synthesized. It crystallizes in the triclinic system, space group P -1, Z = 1, with the following unit-cell-parameters: a = 7.0026(2) Å, b = 7.3297(2) Å, c = 7.7885(3) Å, α = 81.229(1)°, β = 71.064(1)°, γ = 88.172…
The influence of the temperature and concentration of NaOH on the formation of porous was investigated. The porous was obtained only after a immersion in NaOH at . The X-ray diffraction pattern indicated that the porous layer consisted of a mixture of anatase and rutile types of . During immersion in the NaOH solution…
The combination of x-ray absorption spectroscopy (XAS) with UV-Vis and Raman spectroscopies or with Differential Scanning Calorimetry (DSC) has been recently carried out on the D44 beamline of DCI-LURE. The different set-ups used to perform such combinations are described and examples of combined investigations belong…
Abstract β‐(Perfluoroalkyl)tetraarylporphyrin radicals, generated by the reaction of I(CF 2 ) n X ( n = 2−5; X = I, Cl) with porphyrins in the presence of Na 2 S 2 O 4 /NaHCO 3 in DMSO/CH 2 Cl 2 or DMSO, undergo cyclizations at the ortho position of a neighbouring phenyl ring and/or adjacent pyrrolic unit to give five…
This paper presents an optimization based method for simulation of forming processes of woven fabric reinforced composites. Two approaches are proposed for the simulation of the forming of woven fabric: geometrical and mechanical. The geometrical approach is based on a fishnet model. It is well adapted to pre-dimensio…
A selection of donor–acceptor chromophores containing the redox-active dithiafulvene unit about acetylenic and aryl scaffolds has been synthesised. The molecules were studied for their optical, redox and structural properties. Moreover, third-order non-linear optical properties were investigated as a function of molec…
In this work, Ti matrix composite reinforced with dispersed Ti5Si3 particles was synthesized via spark plasma sintering starting with Ti and SiO2. Because reports on the equilibrium phase diagram show that there is a two phase region with O dissolved Ti, Ti(O), and Ti5Si3, Ti and small amount of SiO2 transform into Ti…
A new and simple procedure for determination of leakage reactance and analysis of electromagnetic forces that acting upon the transformer coils is presented in this paper. Before manufacturing and within the design process, it is required that we model the transformer and analyze the transformer condition using this m…
The microstructure of the high-temperature quenched oxides of the (1 − x) Y0.15Zr0.85O1.93 – x Y0.75Nb0.25O1.75 (0 ≤ x ≤ 1) system has been investigated by selected area electron diffraction and high resolution transmission electron microscopy. We have found three types of fluorite structure: the x = 0 end member of t…
The temperature dependence of electrical conduction current in additive-free poly-L-lactic acid was measured from 20 °C to 90 °C under application of dc 2.5 kV. Although the current obeys the Arrhenius formula, a hump appears in some conditions, depending on whether the temperature is being ascended or descended, and…
Infrared spectra for the O-H stretching vibration, , region were studied for Sc- and Y-doped and Y-doped ceramics. For Sc-doped and Y-doped , two intense bands at and were observed for the low doping level. With increasing doping level, two bands at and appeared in addition to the bands at and and increased their inte…
We present confocal microscopy studies of novel particle-stabilized emulsions. The novelty arises because the immiscible fluids have an accessible upper critical solution temperature. The emulsions have been created by beginning with particles dispersed in the single-fluid phase. On cooling, regions of the minority ph…
The evolution of fragipans in the Great Lakes region is poorly understood despite the common occurrence of fragipans in the region. To help resolve this problem, three soils with fragipans in northern Michigan were studied to evaluate the pedogenic pathways for fragipan evolution, and the results extended to soils for…