Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Low stress mechanical properties of cotton /polyester yams representing random fiber disposition and core-sheath construction are compared to determine the influence of fiber distribution on yam properties. The yams are converted into plain weave fabrics under identical conditions, and fabric properties are compared t…
Abstract Composites based on polypropylene (PP) (homopolymer and impact modified copolymer) and surface modified aluminium hydroxide (Al(OH) 3 ) have been studied using differential scanning calorimetry (DSC) and X‐ray diffraction (XRD). Filler surface modifiers used included 2‐dodecen‐1‐yl succinic anhydride (DDSA) a…
A survey will be given on recent advances in the investigation of semiconductor epilayers, heterostructures and superlattices using reciprocal space mapping techniques based on triple-axis diffractometry. It is shown that X-ray reciprocal space mapping yields quantitative information on strain, strain relaxation, as w…
Rare earth perchlorate complexes with the Schiff base 4-N-(4′-antipyrylmethylidene)aminoantipyrine (AA) of the types [Ln(AA)2ClO4](ClO4)2 (where Ln = La, Pr, Nd, Sm and Eu) and [Ln(AA)3](ClO4)3 (where Ln = Gd, Dy, Ho, Er and Y) have been synthesised and characterised. In these complexes AA acts as a terdentate ligand.…
Balsamorhiza sagittata, a species of ethnopharmacological interest in British Columbia, is reported to have antibacterial and antifungal properties. An antibacterial compound isolated from this species was identified as 7,10-epithio-7,9-tridecadiene-3,5,11-triyne-1,2-diol based on the HMQC and HMBC experiments.
The oxidation characteristics of Al and Al–Ta alloy films (500 Å) deposited as a passivation layer on Cu have been examined by depth profiling using Auger electron spectroscopy and X-ray photoelectron spectroscopy. Although alloying between Al and Cu takes place, the Al films prevent the oxidation of Cu up to the oxid…
Mutation of Arg-15, Glu-19, Arg-22, and Thr-27 of porcine liver fructose-1,6-bisphosphatase was carried out by site-directed mutagenesis. These residues are conserved in all known primary sequences of mammalian fructose-1,6-bisphosphatase. On the basis of the crystal structure of the enzyme, Arg-15, Glu-19, and Arg-22…
When a ZnO powder compact is sintered at 1450°C in air, the grains at the surface region of the specimen are observed to grow abnormally. Such abnormal grain growth does not occur when the specimen is sealed in a small cylindrical quartz tube and sintered at the same temperature. The higher rate of densification at th…
The photocontrolled millimeter-wave (MMW) antenna is an alternative approach to the phased array. It offers a high potential to decrease fabrication cost. We describe a new MMW scanning antenna controlled by light. The basic antenna element is a semiconductor plate containing a photoinduced plasma grating (PIPG). By c…
Abstract Mit einer neuen Darstellungsmethode für ternäre Natriumoxometallate gelang die Synthese von vorher unbekanntem Na 10 Zn 4 O 9 . Aktives ZnO wird dabei mit Na 2 O umgesetzt, das in situ aus NaN 3 und NaNO 2 erzeugt wird. Die Verbindung ist aus ZnO 4 ‐Tetraedern aufgebaut, die miteinander über Ecken und Kanten…
Other| February 01, 1996 Naturally occurring ferric iron sanidine from the Leucite Hills lamproite Scott M. Kuehner; Scott M. Kuehner University of Washington, Department of Geological Sciences, Seattle, WA, United States Search for other works by this author on: GSW Google Scholar Dave J. Joswiak Dave J. Joswiak Sear…
The present study provides results of the corrosion behaviour in Hank's physiological solution and some other properties of three Ti-Ni alloys with 18, 25 and 28.4 wt% Ni, respectively. Results indicate that alpha-titanium and Ti2Ni were the two major phases in all three Ti-Ni alloys. The relative amount of the Ti2Ni…
Magnesium aluminate whiskers were synthesized by an oxidation—reduction reaction between MgO, C, and Al in a CO and CO 2 atmosphere. The oxygen partial pressure suitable for MgAl 2 O 4 whisker growth ranged from 10 −12.1 to 10 −11.5 MPa. The average whisker diameter and length formed at 1500°C for 8 h were ∼3.1 μm and…
The substrate specificity of the NADP-dependent isocitrate dehydrogenase of Escherichia coli was investigated by combining site-directed mutagenesis and utilization of alternative substrates. A comparison of the kinetics of the wild-type enzyme with 2R-malate reveals that the gamma-carboxylate of 2R,3S-isocitrate cont…
An exploratory examination has been made of three different kinds of hardpans found in humus podzols (Humods and Aquods) of the coastal lowlands of southern Queensland, by means of slaking tests, a reactive aluminium test, acid oxalate and pyrophosphate extractions and electron microscopy. Samples from three indurated…
The exceptional properties of a new class of linear polymeric hydrocarbons, obtained by the polymerization of α-olefins, are described. The high melting points, the high degree of crystallinity, the low solubility, and the special mechanical properties of these polymers are attributed to a particular regularity of str…
Alumina granules charged with P were used as an amendment to improve the ability of a soilless medium to retain P and provide it to plants. Commercially available alumina was acidified, saturated with P, and evenly distributed in a medium of peat, vermiculite, and sand to grow potted marigolds ( Tagetes spp.) to a com…
The melt flow behavior of natural rubber composites containing untreated, acetylated and gamma ray irradiated coir fibers was studied using an Instron Capillary Rheometer. Coir fibers of length 10 mm were used at different loading, viz., 5, 10, 20 and 30 phr. The dependence of melt viscosity, flow behavior index (n′)…
Other| February 01, 1996 Ordering of the stacking sequence in cookeite with increasing pressure; an HRTEM study Michel Jullien; Michel Jullien Ecole Normale Superieure, Laboratorie de Geologie, Paris, France Search for other works by this author on: GSW Google Scholar Alain Baronnet; Alain Baronnet Search for other wo…
For almost a century now the phenomenon of stress corrosion cracking (SCC) has intrigued many but still continues to excite scientific controversy. This process can cause catastrophic failure in normally ductile alloys and is of serious engineering concern. Of particular importance is the case of transgranular (T) SCC…