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。
Eu3+, Pr3+, or Gd3+codoped Ce:YAG single crystals were grown by using the Czochralski method. The photoluminescence(PL) emission and excitation spectra and transmittance were measured and investigated. The additional red-emitting bands were observed in the PL emission spectra of Eu,Ce:YAG and Pr,Ce:YAG single crystals…
This archive contains the data and scripts to reproduce the graphs in Figures 3, 5, and 7 in Microscale extraction and phase separation using a porous capillary, Lab Chip, 2015 (DOI: 10.1039/C5LC00430F). Please see README.txt for more information.
Ba（Mg1/3Nb2/3）O3（BMN）复合钙钛矿陶瓷具有高介电常数和高品质因子等介电性能,预示了其在光学领域的应用前景.本文采用第一性原理方法计算了BMN的电子结构,对其本征光学性能进行分析和预测.对固相合成六方相BMN的XRD测试结果进行Rietveld精修（加权方差因子Rwp=6.73%,方差因子Rp=5.05%）,在此基础上建立晶体结构模型并对其进行几何优化.运用基于密度泛函理论（DFT）的平面波赝势方法,对六方相BMN晶体模型的能带、态密度和光学性质进行理论计算.结果表明BMN的能带结构为间接带隙,禁带宽度Eg=2.728 e V.Mg-O和Ba-O以离子键结合为主,Nb-O以共价键结合为主,费米面附近的能带主要由O-…
The three-dimensional ordered macroporous CeO2:Yb,Er materials were prepared, and the influence of doping concentration of Yb3+ or Er3+ ions on upconversion property was investigated. Green and red upconversion emissions were observed under the excitation of 980 nm at room temperature. It was found that the ratio of r…
Versuche zur Antibiotikawirkung von Daptomycin und der Immunsuppression bei Myasthenia gravis Daptomycin ist ein cyclisches Lipopeptidantibiotikum, das zur Behandlung schwerer gram-positiver Infektionen entwickelt wurde. Daptomycin weist in vitro eine schnelle Aktivitat gegen klinisch signifikante Stamme gram-positive…
Silika merupakan produk yang dihasilkan dari hydrated silica yang tersedia dalam berbagai ukuran partikel dan karakteristik. Silika adalah bahan yang mudah ditemukan dan secara mekanis dapat menjadi stain remover. Ukuran partikel silika yang besar dapat mengakibatkan goresan yang dalam pada gigi dan mudah mengalami st…
目的 观察自行研制的记忆合金可扩张椎体支架（shape memory alloy expandable vertebrae stent,SMA-EVS）的初步力学性能.方法 对1.0mm厚度记忆合金板材研制的3瓣、4瓣、5瓣各1枚和0.8mm厚度的记忆合金板材研制的5瓣2枚、6瓣1枚可扩张椎体支架进行初步的压力测试,观察支架的应力-位移曲线变化.结果 在测试的力学-位移结果中,EVS压力位移曲线呈“S”形变化,随着压力增大,支架的力量逐渐增大;当支架位移压缩7mm时,4瓣、5瓣支架的极限张力为100～246N;所测试的支架在完全压缩后没有断裂;压缩后的支架置于温水中,支架均完全扩张,支架高度没有丢失.结论 记忆合金可扩张椎体支架具…
采用全面腐蚀实验及SEM,EDS等表面分析技术研究了2205双相不锈钢在不同Cl-含量的饱和H2S/CO2溶液中腐蚀速率、腐蚀形态以及腐蚀表面膜层成分,并建立腐蚀过程机制模型。结果表明：随着温度与Cl-浓度的变化,腐蚀速率发生变化的转折点在Cl-浓度为（57-100）×10-6时,p H=4时,Cl-为170×10-6,温度50℃时的腐蚀速率最大,p H=6时,Cl-为170×10-6,温度80℃时的腐蚀速率最大,其最大腐蚀速率不超过0.004 mm/a;腐蚀表面形成较为致密的钝化膜,随着温度与氯离子浓度的升高,表面出现3~5μm的不稳定点蚀核。
A facile synthesis route is described for the preparation of a Polypyrrole-gold nanoparticles composite material by polymerization of pyrrole using Gold-hydrochloride (HAuCl4) and ferric chloride (FeCl3) as oxidants. The synthesized composites were characterized by Fourier transfer spectra (FTIR), UV-vis spectra and X…
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências da Saúde, Programa de Pós-Graduação em Farmácia, Florianópolis, 2015.
Effective mixing and rapid combustion is very important to the flow field of combustion chamber in solid rocket ramjet. The flow field of combustion chamber in solid rocket ramjet was simulated based on finite rate chemical reaction model and infinite rate chemical reaction model .The result of two kinds of chemical r…
Tez kapsaminda 4-florobenzil diaminler (1-3) ile oktaklorosiklotetrafosfazenin (tetramer, N4P4Cl8) reaksiyonlari sonucunda yeni spiro-siklotetrafosfazen bilesikleri (4-6) sentezlendi. Kismen substitue fosfazen turevi (6)’nin THF ortaminda pirolidin, piperidin, 1,4-dioksa-8-azaspiro[4,5]dekan (DASD) ve morfolin ile tep…
在管道基础设施方面，博禄推出了独特的聚丙烯（PP—R）冷、热水管解决方案。新的RA140EPP—R符合最近更新的ISO15874行业标准。这是用于冷热水管道安装的聚丙烯管道系统全球标准。由RA140E生产组成的PP．R管道相对于标准的PP-R管道在抗冲击性能上有显著的提高，使其耐用、防漏和安装轻便。
The study is devoted to investigation of density, surface tension, kinematic and dynamic viscosity and magnetic susceptibility of molten iron and iron alloys with carbon and nickel. The iron contained 0.04794 % of impurities (39 impurity elements were determined). Iron–carbon and iron–nickel alloys were prepared in la…
Annales, Chemia
为测量活性污泥中K，Ca，Mg，Fe，Al 5种金属元素的含量，以超声波分散污泥絮体为基础，提出了封闭回流消解/ICP？AES测量活性污泥金属元素的较优方法和程序。封闭回流消解过程中，先在1 mL超声波处理后的污泥样品中加入3.5 mL HNO3，于125℃消解35 min，然后加入0.5 mL H2O2，进一步消解10 min，保证ICP？AES测量污泥中K，Ca，Mg，Fe，Al含量时具有良好的准确度和精密度，其加标回收率为96.8%~104.6%，相对标准偏差≤4.3%。封闭回流消解/ICP？AES测量活性污泥金属元素具有操作简单、用酸量省、稳定性好、适用性强、结果准确可靠的优点。
Cu 2 ZnSnSe 4 thin films were prepared by spin-coating and chemical co-reduction with different heating modes. The phases of obtained samples were characterized by X-ray diffraction (XRD). The size and morphology of the products were observed by scanning electron microscope (SEM). Experimental results show that, the i…
Az atkák (Acari) alosztályának talajban élő, főként növényi eredetű anyagokkal táplálkozó, változatos morfológiájú és fajokban igen gazdag csoportja a páncélosatkák rendje (Oribatida).Méretük 110-3000 µm között mozog, színük a fehértől a barnán át a feketéig változhat, alakjukat tekintve lehetnek hengeresek, illetve o…
通过高压釜腐蚀实验研究了添加微量S对Zr-0.70Sn-0.35Nb-0.30Fe（质量分数,%）合金在360℃/18.6 MPa/0.01 mol/L LiOH水溶液中耐腐蚀性能的影响.利用透射电子显微镜（transmission electron microscope,TEM）和扫描电子显微镜（scanning electron microscope,SEM）观察和分析了合金及腐蚀后氧化膜的显微组织.结果表明：在Zr-0.70Sn-0.35Nb-0.30Fe合金中添加5～570μg/g的S后,合金的耐腐蚀性能下降,且随着S含量的增加恶化趋势显著.S的表面偏聚、尺寸较大的Zr9S2和Zr3Fe第二相的析出,加速了氧化膜中缺陷扩散…
El siguiente proyecto plantea el diseno de una maquina enderezadora de laminas de acero inoxidable de 0,30 hasta 0,60 mm, y un ancho de 1220 mm; su objetivo es eliminar las deformaciones en las laminas que metalurgicamente son los esfuerzos residuales y ocurren a causa de muchas condiciones inherentes en la estructura…