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。
One of the most obvious disadvantages with a reciprocating Active Magnetic Regenerative (AMR) refrigerator is the production of large unbalanced forces. Typical reciprocating AMR geometries use a single super-conducting solenoid with two AMR beds moving along the solenoid axis and spaced some distance apart. In this c…
It is expected that in the new century, to cope with developments of new high temperature technologies, a new generation of high performance refractory ceramics will emerge and flourish which should include the following (1) oxide and nonoxide composites characterized by a unique combination of high hot strength, high…
Scale and Naphthenate Inhibition in Deep-Offshore Fields Alexandre Goldszal; Alexandre Goldszal Total Fina Elf Search for other works by this author on: This Site Google Scholar Christian Hurtevent; Christian Hurtevent Total Fina Elf Search for other works by this author on: This Site Google Scholar Guy Rousseau Guy R…
Abstract The reaction of 1,4‐naphthoquinone ( 1 ) with 2,5‐dimethylpyrroles ( 7a‐7d ) gives only 3‐(1,4‐naphtho‐quinonyl)‐2,5‐dimethylpyrroles. Extending the reaction to other quinones: 5‐hydroxy‐1,4‐naphthoquinone ( 2 ), 1,2‐naphthoquinone ( 3 ), quinoline‐5,8‐dione ( 4 ) and quinoxaline‐5,8‐dione ( 5 ), of which not…
通过物理实验和数值模拟,研究双轴作用下不同几何分布和不同围压的断续预置三裂纹的萌生、扩展和贯通机制。结果清楚显示裂纹贯通机制主要受加载条件与预置裂纹几何分布的影响。在双轴加载条件下,裂纹贯通的模式包括拉贯通、剪贯通、压贯通和混合贯通。拉裂纹在双轴加载下, 其扩展速度减慢或停止,且在岩桥间出现剪裂纹,从而形成混合贯通或剪贯通。压裂纹是在侧压下产生的次生裂纹,其贯通受制于两非共线的重叠裂纹间的岩距。当1<b/c<1.8(岩距与裂纹长度的比值为b/c)时,则压裂纹最为活跃,否则压裂纹较难生长。双轴作用下,三裂纹在峰值附近有两组贯通裂纹,在单轴情况则通常只发生一组贯通裂纹。此外,随着压力增加,预置裂纹间更加闭合,导致预置裂纹的…
Molten silicate and aluminosilicate slag structures have been reviewed based on the recent experimental results measured by such as Raman spectroscopy, high temperature NMR, high temperature X ray analysis. The structures of these melts discussed in this review may be summarized as follows:The anionic structure of alk…
The character of the growth and physiology of Skeletonema costatum was studied in different N/P (1:1, 4:1, 16:1, 80:1, 160:1) status, and batch culture experiments were conducted. Growth rate, Chl-a, carbohydrate and crude protein were measured periodically. The results showed that, the optimum N:P ratio of Skeletonem…
In the first part of this article, the method for the preparation of diblock copolymer brushes from free radical homopolymerization of the corresponding diblock macromonomers is reviewed. These diblock copolymer brushes formed a unimolecular structure in dilute solution. Moreover, it was speculated from angular depend…
The present paper deals with new health aspects of clothing. These research studies were undertaken to determine the influence of natural and synthetic fibres which temporarily cover the forearm muscles on the activity of the motor units in these muscles. The electrophysiological parameters of motor units were measure…
The usefulness was assessed of two ceramic fibres, α-Al 2 O 3 and α-Al 2 O 3 /mullite mixture, for improving the toughness of sodium polyphosphate-modified fly ash/calcium aluminate blended (SFCB) cement, which is used for completing geothermal wells. At the hydrothermal temperature of 280°C, the reaction between the…
Low temperature plasma is a useful technique to change the physical and chemical properties of textile materials. In this experiment, the effect of low temperature plasma discharge treatment (helium) on physical, mechanical and chemical properties of polypropylene fibers and fabrics has been investigated for the diffe…
he effect(s) of four different types of surfactants on the enzymatic hydrolysis of cellulosic fabric was studied. Amount of reducing sugar produced during the reaction was used as a measure of extent of the hydrolysis. The non-ionic surfactant increased the rate of the reaction by approximately 12% while in the presen…
Planar rigid-rod push–pull 2,6-diphenylbenzo[1,2-d:4,5-d′]bisthiazole (DPBBT) derivatives have been synthesized; they show highly efficient second-order nonlinear optical nonlinearities, exhibit optical transparency down to 532 nm and are thermally stable.
In this paper, the refractive index profiles of the periodically segmented waveguides (PSWs), which are fabricated in soda-lime glasses by the K/sup +/-Na/sup +/ ion-exchanged technique, are reconstructed from the measured transmitted near-field (NF) intensity combined with an inverse method. Through the proposed inve…
A eutectic powder of Al203–GdA103 was melted using a Mo crucible by induction heating. The melt was slowly solidified, resulting in a eutectic solid with coarse Al203 and GdAl03 phases. The eutectic solid was ground and sieved into 3–44 µm and 64–124 µm particles. The powders were consolidated to produce a eutectic co…
This paper presents a selection of the eutectic systems in the Al2O3–Y2O3–ZrO2 pseudo-ternary system and the production of the undercooled melt due to melting of the metastable eutectic structure at the metastable eutectic temperature. In the pseudo-ternary system, there are two eutectic systems; one is the Al2O3–YAG(…
A new apparatus based on the technique of Fourier transform thermal analysis for the measurement of thermal diffusivity, specific heat per unit volume, thermal effusivity, and thermal conductivity of thin solid and liquids films (of the order of micrometres) has been developed. The apparatus consists of the following…
The decomposition of ozone on a Cu(l10) surface has been studied using AM1 method. O3 probably adsorbs on Cu(l10) to decompose into a molecular oxygen and an adsorbed atomic oxygen species, an adsorbed atomic oxygen reacts with O3 to form an O4 -intermediate, and O4 - decomposes into two oxygen molecules. Intermediate…
An automatic wicking test method using image analysis technique was developed in order to automate the longitudinal wicking test and improve the accuracy of wicking measurement. It was particularly useful for conducting wicking measurement during the initial rapid wicking process. The comparison between the manual and…
Japan Atomic Energy Research Institute (JAERI) has been developing design studies of the Gas Turbine High Temperature Reactor (GTHTR300) based on the experiences of development of the High Temperature Engineering Test Reactor (HTTR) of JAERI. Feasibility of the GTHTR300 fuel which is irradiated under high burnup condi…