Materials Literature
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Abstract— Darwin glass formed by impact melting, probably during excavation of the 1.2 km diameter Darwin crater, Tasmania, Australia. The glass was ejected up to 20 km from the source crater and forms a strewn field of >400 km2. There is at least 11,250 m3of glass in the strewn field and relative to the size of the c…
A technique is developed for the far field pattern analysis of reflectarrays, which is called 'element-in-array pattern' analysis technique. The technique rigorously takes the effects of mutual coupling between elements and the surrounding array environment into account by extracting the scattered fields of the elemen…
To expand the application of a drug in orally disintegrating tablets, the potential use of beta-cyclodextrin (beta-CyD) and 2-hydroxypropyl-beta-cyclodextrin (HP-beta-CyD) as excipients for the tablets containing dl-alpha-tocopheryl acetate (VE), an oily drug, was evaluated. HP-beta-CyD, not beta-CyD, solubilized VE i…
An array of microplasmas with sizes ranging from a millimeter to a micrometer, has potential for novel and promising electromagnetic-wave media, especially when the wave frequency is below the electron plasma frequency. Photonic crystals or band-gap materials composed of microplasmas have unique properties arising fro…
Pyrometallurgical reprocessing technology is currently being focused in many countries for closing actinide fuel cycle because of its favorable economic potential and an intrinsic proliferation-resistant feature due to the inherent difficulty of extracting weapons-usable plutonium. The feasibility of pyrometallurgical…
Abstract This paper describes the dynamic covalent assembly of three mono‐, bi‐ and trimacrocycles by utilizing hydrogen bonding‐driven zigzag anthranilamides as "leading" components. The monomacrocycle, a tetraamino molecule, was prepared from the [2+2] coupling reaction of a "U"‐shaped dialdehyde and a porphyrin dia…
We calculate the intrinsic Hall conductivity of conductions electrons coupled to a pyrochlore lattice of localized moments. In the presence of anisotropy the localized moments may order in a non-coplanar chiral structure, which can be at the origin of an intrinsic Hall effect. The sign and the value of the Hall conduc…
Using a pyridine amide ligand 4-methyl-2-{N-(2-pyridyl)carbamoyl}pyridine (HL), in its deprotonated form, binuclear mixed-valence homonuclear bimetallic complexes [CoIII,II2(L)3(X)]X·S [X = Cl (1); X = Br, S = CH3OH (2)] and heteronuclear bimetallic complex [CoIIIZnII(L)3(Cl)]Cl·CH3OH·5H2O (3) have been synthesized. S…
The dependence of the oxygen reduction reaction (ORR) activity of Pt/C catalysts used in actual polymer electrolyte fuel cell membrane electrode assemblies (PEFC MEAs) on cell temperature, O2 partial pressure and catalyst loading has been investigated. Based on physical chemistry and electrochemistry points of view, t…
The tetraethylammonium tetramethylammonium tetrabromocuprate(II), (hereafter, [(TEA)(TMA)CuBr 4 ]) [(C 2 H 5 ) 4 N][(CH 3 ) 4 N][CuBr 4 ], complex was synthesized and characterized by spectroscopic (IR), structural (XRD) and electron paramagnetic resonance (EPR) technique. The compound contains four isolated and discr…
Calix[4]pyrroles bearing appended pyrenyl groups at the meso-positions on one side of the calix[4]pyrrole have been synthesised and characterised. These species act as hosts that exhibit a selective increase in their fluorescence intensity upon the addition of Pb2 + or Cu2 + . When excess chloride anion is added after…
Investigation of the phase formation during mechanical alloying (MA) was systematically performed in the Ti-O system. Powder mixtures of Ti and TiO 2 with various compositions and single-phase Ti 2 O, α-TiO and α-Ti 2 O 3 powders were respectively subjected to planetary ball milling. According to X-ray diffractometry,…
The incorporation of micro-agglomerated cork in structural and impact applications is studied. A numerical study on cellular materials commonly used in energy absorption applications is presented. The mechanical behaviour under impact loading of polyurethane foam, IMPAXX™ 300, aluminium foam and micro-agglomerated cor…
Eutectic Freeze Crystallization (EFC) is a novel separation technique that can recover salt and ice by operating the crystallizer at eutectic conditions. It has the potential to treat South African hypersaline brines and produce a number of pure salts and pure ice. However, a significant problem arises when two salts…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation Matthias Troyer, Philipp Werner; Quantum Monte Carlo Simulations. AIP Conf. Proc. 20 August 2009;…
The studies on crack‐tip plastic zones are of fundamental importance in describing the process of failure and in formulating various fracture criteria. The material fracture by opening mode (mode I) is not solely responsible for fracture propagation. Many industrial examples show the presence of mode II and mixed mode…
Objective To know the status of the production,collection and treatment of different types of garbage in the rural areas in China.Methods The investigated sites were selected by random sampling and the questionnaires were answered by village leaders during 2006-2007.SAS8.2 statistical analysis software was used to ana…
Pure phase monoclinic bismuth vanadate powders of a nanosized diameter were synthesized by the hydrothermal method and characterized using XRD, TEM, DRS, Raman and FTIR techniques. The results revealed that the hydrothermal conditions (16 h at 140–240 °C) are favourable for the formation of monoclinic bismuth vanadate…
The chemical components of Paxillus involutus were isolated from the freshly collected fruit bodies.Mainly on the basis of the NMR and ESI-MS data, the structures of the unknown pigments were determined as 4-(3,4dihydroxyphenyl)-2-(4-hydroxyphenyl)-2-(2-pyrrolidon-5-yl)-4-cyclopentene-1,3-dione and (4Z)-5-hydroxy-2-(3…
By means of computer simulations, we study how droplets of hard, rodlike particles optimize their shape and internal structure under the influence of the osmotic compression caused by the presence of spherical particles that act as depletion agents. At sufficiently high osmotic pressures, the rods that make up the dro…