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。
Original gatherings of a number of freshwater or brackish naviculoid taxa were identified and examined primarily from collections held in the Natural History Museum, London. Morphological descriptions are provided for each, and type slides have been designated. Because original material of Navicula ambigua Ehrenberg d…
The electric, dielectric, and thermoelectric properties have been studied for a series of ZnxMg0.8–xNi0.2Fe2O4 ferrite samples (with x = 0, 0.2, 0.4, 0.6, and 0.8) prepared using the usual ceramic technique. The experimental results indicated that the real dielectric constant ε′ and dielectric loss factor tan δ decrea…
Keywords: THRACE UNIVERSITY THESSALONIKI , GREECE MINISTRY OF PUBLIC WORKS SKIDS , RESISTANCE , PREDICTION , MEASUREMENT , TEXTURE , ROADS , SURFACES , TYRES , PAVEMENTS , WATER , FILM , EQUATIONS , REGRESSION , MODELLING , MATHEMATICAL , MODELS , FRICTION , INTERACTION , CORRELATION , REDUCTION , WET , WEAR , RESEARC…
Abstract A dialkylsilicon porphyrin Si(TPP)(CH2CH3)2 (1) (TPP=5,10,15,20-tetraphenylporphinato) reacted with dioxygen in the dark to give a bis(ethylperoxide) complex (5), from which a dihydroxysilicon porphyrin (Si(TPP)(OH)2, (6) was obtained upon reduction and hydrolysis. In contrast with the phosphorous analogue [P…
Several real-space indices and temperature factors are compared with respect to their correlation with atomic positional error and their ability to indicate atoms and residues with the worst of subtle errors. The best index, rED, is a correlation coefficient between model and map electron densities, similar to one pro…
Carbon deposition (also called coking or fouling) is of major concern in a range of industries in which process gases are carbon bearing. It can limit support catalyst lifetimes and can affect seriously the thermal hydraulic performance and/or mechanical integrity of plant structural components. This general overview…
Crystals of alcohol dehydrogenase from Sulfolobus solfataricus were grown in the Advanced Protein Crystallization Facility during the Life and Microgravity Sciences Spacelab mission on the US Space Shuttle. Large diffracting crystals were obtained by dialysis, whereas only poor-quality crystals were obtained by vapour…
The magnetic and electric hyperfine interaction and the relative fractions of dilute ${}^{57}\mathrm{Fe}$ nuclei on the four Co sites of ${\mathrm{Y}}_{1\ensuremath{-}s}{\mathrm{Co}}_{5+2s}$ have been investigated by M\"ossbauer spectroscopy as a function of the relative number $s$ of Y atoms substituted by Co dumbbel…
We have developed a 15‐inch TFT driven anti‐ferroelectric LCD with XGA resolution for monitor applications; this LCD is the largest of its type and has the highest resolution reported so far. Even in the case of XGA resolution, higher contrast ratio than 100:1 has been achieved by applying novel quasi‐DC driving schem…
The friction and wear behaviour of a series of new Si 3 N 4 -SiC-based ceramic composites, intended for face seal applications, has been investigated with cylinder-on-disc equipment. In particular, the influence of water and vapour on the friction, wear and tribo-film formation has been studied. The ceramics consisted…
The role of localized defect centers and continuous gap states distribution in photoluminescence, photoconductivity, and photoresponse time dependence of diamond films have been analyzed for different film morphology and grain orientations. Sharp spectroscopic features related to impurity centers or broad components a…
Abstract Laboratory coats which had been subjected to contact with a yellow polyester/cotton polo shirt and were subsequently sent to an external laundry service. Surface debris tapings were taken from the items on return, and these were searched for fibers originating from the target garment. Additionally, a mock ass…
The formation process of field induced smectic C* layer structures known as 'horizontal chevrons' has been investigated as a function of external parameters. Characteristic dimensions of field induced domains, as well as the dynamics of their formation process are reported for a variation of cell gap, applied electric…
Single crystals of the uniform n-alkane C294H590 were grown from dilute solution in toluene in the temperature range 75°C to 85°C; the subsequent dissolution behavior during reheating was determined using calorimetry. Two crystal forms were recorded corresponding to once-and twice-folded chains. During isothermal crys…
Three novel triaromatic diepoxides, 1,4-phenylene bis(4-(2,3-epoxypropoxy)benzoate) (1), methyl-1,4-phenylene bis(4-(2,3-epoxypropoxy)benzoate) (2), and chloro-1,4-phenylene bis(4-(2,3-epoxypropoxy)benzoate) (3), were synthesized and their mesogenic properties studied. 1 and 2 were reacted with 4,4′-diaminobiphenyl (4…
La présente étude a permis de déterminer la flore diatomifère de quatre sources thermales situées au Canada (Îles de la Reine-Charlotte en Colombie Britannique et Takhini au Yukon), au sud-ouest de l'Islande et au Japon (mont Hakone). La composition en espèces des assemblages de chaque échantillon est décrite et appuy…
All articles of this category Treatment of unprotected pentitols and hexitols with RhH(PPh 3 ) 4 -benzalacetone system leads exclusively to glycono-1,4-lactones in 60-96% yield. unprotected itols - oxidation - T.C.H - RhH(PPh 3 ) 4 -benzalacetone - glyconolactones
States that computer simulations of seam pucker were executed. The simulations were based on the computer program which predicts the shape of virtual fabric with an assumption that the relationship between stress and strain of the virtual fabric is linear. The simulations predicted the shape of fabric with the conditi…
This paper reports the fabrication and evaluation of Mo/Al and Mo/Si multilayer films (MLs) for a wavelength of 18.5 nm. Calculated reflectivities of Mo/Al MLs at an incident angle of 10 degrees were about 7% higher than those of Mo/Si MLs. MLs were fabricated using an RF-magnetron sputtering deposition system. The me…
Deformation of a spunbonded nonwoven fabric specimen is extremely nonuniform during a uniaxial tensile test. Complex stress/strain fields are generated in the specimen due to the effect of the jaws, the nonlinear nature of deformation, and the low shear stiffness of the fabric, causing "necking" to take place in the u…