Materials Literature
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In this paper the spectroscopic and the geometric properties of four ligands with pyrazole unit are studied at both experimental and computational levels.The computational results are perfectly in good agreement with the experimental results especially in terms of the IR,1 H-NMR and 13 C-NMR shifts.The spectroscopic f…
Lead free ferroelectric ceramics,(1-x)(0.97Na0.5K0.5NbO3+0.03LiTaO3)+xBiInO3[(1-x)(KNN+LT)+xBI] ternary solid solution system were prepared by conventional solid state reaction method. The polycrystal structure, dielectric and piezo-/ferro-electric properties were systematically characterized. The results show that th…
镁(Mg ) 基于金属拥有能被用于不同目的 biodegradation 的唯一的特征。在这研究，二个肿瘤房间， MG63 和 KB，在有或没有毛涂层的纯 Mg 上直接是有教养的在肿瘤房间上评估他们的细胞毒素的效果。MG63 房间和 KB 房间在纯 Mg 样品上比那些在涂的 Mg 样品的表面上更好粘住，这被发现。然而，房间显然是的二种肿瘤的幸存在纯钛上有或没有涂层在两件 Mg 样品上禁止了，与那相比。另外， MG63 房间的幸存与 KB 房间相比对 Mg 降级更易感。因此，如此的效果的申请应该考虑 Mg 的降级基于金属，这可以在不同房间上导致不同细胞毒素的效果。
Nowadays,one of the bottlenecks which hinder the development and application of carbon nanotube(CNT)nano device is that no pure semiconducting CNT(s-CNT)or metallic CNT(m-CNT)can be obtained,and for solving this problem scientists proposed some methods on preparation or separation,but all the results still should be d…
【Objective】The microstructure and thermal properties of bamboo shoots shell fiber were studied to provide theoretical references for development and utilization of bamboo resources. 【Method】Cross section and morphological characteristics were observed under electron microscope. Degree of crystallinity of fiber was mea…
The yellow SrSi2O2N2:Eu2+ phosphor has been synthesized by using a simple solid-state reaction method with Srt2SiO4:Eu2 as the precursor. It shows a broad excitation band extending from 250 to 520 nm and an asymmetric emission band with a main peak at about 550 nm. The emission intensity of the SrSi22O2N2:Eut is about…
The corrosion behavior of 254SMo and TP317L stainless steels in the primary and secondary water of papermaking intermediate waters was investigated with electrochemical tests and electron- microscope(EM) technique. This aims to provide the basis for material selection of the condenser of a new 600 MW heating unit. The…
The simplified equilibrium equation and analytical solutions to strains and stresses in thick hollow cylinder are obtained in the framework of Toupin-Mindlin′s strain gradient theory by adopting simplifying assumptions with respet to the higher-order stresses.To verify the feasibility of the analytical solutions of th…
Microstructures and precipitation behaviours of Mg94Y4Zn2（at.%） extruded alloy during solution treatment and ageing processes were investigated.Three major phases were observed in the as-cast Mg94Zn2Y4 alloy:a-Mg,block shaped 18R long period stacking ordered（LPSO） phase and M94Y5 cuboid particles.After homogenization…
组成。电气化学的阻抗光谱学结果证明氟化物变换涂层显著地改进了 AZ31B 的腐蚀抵抗。在沉浸于模仿的血血浆显示了材料的好 bioactivity 以后， hydroxyapatite 在氟化物的表面上形成了涂的 AZ31B。invitro cytotoxicity 测试证明涂的 AZ31B 合金不是的氟化物对 BMMSC 有毒(人的骨头导出髓的间充质的干细胞) 。这也被发现氟化物涂的 AZ31B 合金有的抗菌剂能力。
扭动的 chirality 广泛地在不同长度规模在人工、自然的材料和结构被观察。在这份报纸，我们理论上调查由使用 Timoshenko 横梁模型在有弹性的横梁的机械性质上扭曲 chiral 形态学的效果。特别注意对一根预先扭曲的矩形的横梁的横向的弯曲并且轴的弄弯被给予。分析答案首先在一致地或周期性地分布式的横向的力量下面为一根夹钳免费的横梁的偏转被导出。受到它的自我重量和轴的压缩力量的横梁的批评弄弯条件进一步被解决。结果证明扭动的形态学罐头显著地改进横梁的抵抗到横向的弯曲并且轴的弄弯。这研究帮助理解与在自然扭曲 chirality 联系的一些现象并且为新奇设备和结构的设计提供灵感。
First-principles pseudopotential calculations are performed to investigate the phase transition and elastic properties of niobium nitrides(NbN). The lattice parameters ao and c0/a0, elastic constants C ij, bulk modulus B0, and the pressure derivative of bulk modulus B0 ′ are calculated. The results are in good agreeme…
Abstract Flavodoxins are a family of FMN bindingproteins widely distributed in prokaryotes. They involve invarious electron transfer reactions using the non-covalentlybound FMN cofactor as the redox center. The Escherichiacoli yqcA gene was identified to encode a short-chainfavodoxin based on sequence information. Howe…
A number of preclinical studies have demonstrated anticancer effects for curcumin in various types of tumors,including pancreatic cancer.Curcumin has anticancer effects both alone and in combination with other anticancer drugs(e.g.,gemcitabine,5-fluorouracil,and oxaliplatin),and it has been shown to modulate a variety…
In order to strengthen the electric field between two gold nanowires,a kind of structure was designed by putting them into periodical subwavelength slits.This structure combined the effect of amplifying electric field from the near-field coupled effect and the quasi-Fabry-Perot resonance.Theoretical study indicated th…
在这个工作，我们与一致形状，悦耳的尺寸，和狭窄的尺寸分布描述 PEGylated mesoporous 硅石 nanoparticles (MSN ) 的一个壶合成。这些 nanoparticles 的尺寸能被简单地在催化底的 solgel 反应期间改变 triethanolamine 的集中从 49 nm 控制到 98 nm。粒子被传播电子显微镜学描绘，动态轻散布， Fourier 变换红外线的 spectrometry， thermogravimetric 分析，和氮 adsorptiondesorption 大小。这些 PEGylated MSN 在生物媒介展出了优秀长期的稳定性，它在药交货保证他们的潜在的应用。
Glycine(Gly)was intercalated into Mg 3 Al layered double hydroxides(Gly- Mg3 Al LDHs)by coprecipitation method. The delaminating of Gly-Mg3 Al LDHs in aqueous solution of pH=3~4 was realized by making use of the isoelectric point of Gly. Then Mg3 Al LDHs/montmorillonite layered composite was gained through inserting L…
We performed endoscopic submucosal dissection of a gastric fundus tumor.It was difficult to strip the tumor completely due to space limitation,and we used blunt dissection to remove the tumor quickly and safely.Firstly,the basal area of the 2.5 cm submucosal tumor located in the gastric fundus was cut open,and the muc…
Al2O3 加强分散的铜合金被反应合成和火花血浆 sintering (SPS ) 过程准备。研究证明有 27.4 nm 的缩放 nano 的 -Al2O3 粒子意味着尺寸和 50-nm 间隔在铜矩阵是同类地分布式的。同时， SPS 合金的密度是大约 99 % sintered 合金的电的传导性是坚硬能到达到 HRB 91 的 72 % IACS 和 Rockwell。
Field emission is a phenomenon where electrons are extracted from a conducting material by an external electric field. This effect has been used for electron sources for many applications, from electron microscopes to flat-panel displays. One undesirable feature of field emitters is that they often require high turn-o…