Materials Literature
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This paper gives information about the external morphology, distribution and ecology of Diadesmis confervacea (Grunow) Hustedt, based on material collected in freshwater environments from the Coastal Plain of southern Brazil. The species was found solitary and colony-forming within the plankton and metaphyton of lakes…
O in proper proportions. A 2M solutions of NaOH was prepared as a precipitant. In order to achieve high pH value for simultaneous precipitation of all the hydroxides, the starting solution (pH value about 3.5) was added to the alkali solution and a suspension (pH = 10.5) containing dark green intermediate precipitates…
Zinc oxide (ZnO) thin films were prepared on glass substrate by sol-gel dip-coating method. The structural properties were investigated by x-ray diffraction (XRD) method and atomic force microscope (AFM). The optical properties were measured by UV-Vis spectrophotometer. The XRD patterns showed that the films formed pr…
在现在的研究，一种湖泊的壳(Hyriopsis cumingii ) 的微观结构被使用扫描电子显微镜学，和壳珠母贝的机械行为实验观察并且测量被使用弯曲和张力的测试执行。它的微观结构上的壳珠母贝的机械性质的依赖被使用一个修改砍落后模型，和全面压力紧张关系分析被获得。试验性的结果表明壳珠母贝的机械性质强烈取决于湖泊的壳的水内容。干燥珠母贝显示出易碎的行为，而弄湿珠母贝显示强壮的韧性。比作张力的测试，弯曲测试过高估计力量并且低估幼仔的模量。修改砍落后模型能有效地描绘珠母贝的变丑特征。
The effects of hydrogen and pre-strain on tensile properties of JIS-STPG 370 carbon steel pipe for hydrogen pipelines were investigated. In order to pre-charge hydrogen, the specimens were immersed in a 20 mass% aqueous solution of ammonium thiocyanate at 313 K for 48 h. The hydrogen content increased with increasing…
Fabrication of silver nanoparticle (AgP) - polyion alternate films were successful by using layer-by-layer technique. Alternate films of AgPs and polyion were fabricated as follows. First, a quartz glass substrate or an indium-tin-oxide (ITO) substrate was poured into the solution of polyethyleneimine (PEI) and then p…
In this investigation, the influences of two kinds of agricultural residues (Wheat and Barely straws) mixed with aspen particle were studied for use as insulation boards. the manufacturing parameters were: a kind of straw(Wheat and Barely straw), different percentage of straws ( 0/100, 10/90, 20/80 and 30/70 weight of…
High-C SiOC glasses have been synthesised starting from linear and cyclic SiH-containing polysiloxanes through sililisation. The amount of C has been increased by using divinylbenzene as a crosslinking agent. SiOC glasses have been obtained by pyrolysis in inert atmosphere at temperatures ranging from 1000 to 1400°C.…
Uniaxial tensile tests of ethylene tetra fluoro ethylene(ETFE) foils are described in this paper.Three kinds of ETFE foils with different thicknesses are used in the tests and the specimens are cut from foils along the machine direction(MD) and the transverse direction(TD).The tensile strength,the tensile strain at br…
The structure of borosilicate glass was analyzed by infrared spectra, the thermal expansion coefficient and expansion sof- tening temperature were measured by dilatometer, the phase separation of glass was investigated by scanning electron microscope and the component of silicon-rich phase was analyzed by X-ray energy…
Chemical and phase composition for new high-rhenium single crystal Ni-base superalloy is computer designed. The microstructure, liquation coefficients and misfit-factor of alloy single crystals as cast condition and after thermal treatment are studied. High-temperature creep tests within the temperature range of 900-1…
We have performed systematic ultrahigh-resolution photoemission spectroscopy on the iron-based superconductor LaFeAsO 1- x F x ( x =0-14%) to elucidate the evolution of electronic states with doping. We found that the density of states (DOS) around the Fermi level of the superconducting sample is markedly smaller than…
The high performance of advanced ceramics, fuel cells, and also precision devices for semiconductor systems have been limited by the problem of thermal stresses induced by the thermal expansion between different materials. To avoid this problem, one of the choices is to develop a low or zero-level thermal expansion ma…
The paper presents a method of usable properties of surface layers improvement of cast carbon steel 200–450, by put directly in foundingprocess a composite surface layer on the basis of Fe-Cr-C alloy. Technology of composite surface layer guarantee mainly increase inhardness and aberasive wear resistance of cast steel…
The aim of the research was to reveal the features of electrical charging and dissipation of charges in the polyester fabric containing metal fibres. The woven fabrics for protective clothing to avoid incendiary discharges were manufactured in Lithuanian Textile Institute for the study. Warp threads of the fabrics wer…
This paper compares the diversity and structure of the benthic diatom assemblages on boulder and cobble substrata and examines the influence of site and seasonal factors on diatom diversity in the River Deel, Co. Limerick. One hundred and ten diatom species were identified from the River Deel, with 85 species found on…
The gold-containing titanium peroxo-complex AuCl4(NH4)7[Ti4(O2)4(Hcit)2(cit)2].12H2O 1 allows an easy reproducible access to pure Au/TiO2 composites.
Stable radicals 2-(6-uradinyl)-4,4,5,5-tetramethyl-4,5-dihydro-1H-imidazole-1-oxyl (Ur6IN) and 4-(p-tert-butylaminoxylphenyl)-2,6-di(propylamido)pyridine (DAPPN) form heterospin radical pair complexes due to complementary multi-point hydrogen-bonds.
In this work, deuterium exchange was used as a chemical marker to monitor moisture uptake in ash-damaged, low- spin-on and chemical vapor deposited SiOCH films. Fourier transform infrared spectroscopy was performed to detect differences in deuterium adsorption. A broad-band in the range and peaks at approximately 1350…
Deformation characteristics of a recycled AZ91 Mg alloy, obtained from machined chips by solid state recycling, were investigated by conducting tensile tests between room temperature and 773 K in the strain rate range of 3.3×10−2–3.3×10−4 s−1. Tensile properties of the recycled specimen were compared with those of a r…