Materials Literature
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Samples of Ordinary Portland Cement (OPC) and Portland Pozzolana Cement (PPC) from five companies were analysed for the measurement of 226 Ra, 232 Th and 40 K using a HPGe detector based on high-resolution gamma spectrometry system. The measured activity in the selected OPC cement samples varies from 19.24 Bq kg −1 (J…
The main effect factors about force of pressure head (FPH) are investigated by numerical simulation for the process of equal-channel angular pressing (ECAP). The influence of extrusion mould design parameters which including corner angler ( ) and corner radius (R), friction condition between mould’s inner wall and mul…
Artificially structured media can exhibit a wider range of both linear and nonlinear electromagnetic properties than are supported in conventional media. We discuss the design techniques and impact of these new emerging nonlinear metamaterials.
We report the first observation of x-ray/optical sum frequency generation. An ultrafast optical pulse drives charge oscillations to the chemical bonds in diamond. A co-propagating x-ray pulse micro-probes the accompanying chemical bond distortion.
JAVYS, the Slovak Nuclear Decommissioning Company, the owner and operator of National Radioactive Waste Repository (NRR) at Mochovce, is planning the enlargement of the existing NRR. The enlargement consists of the construction of new structures (double rows) like the ones existing for Low and Intermediate Level Waste…
Nanomaterials are honored as new materials of the 21st century. Compared with traditional organic dyes, quantum dots (QDs) have attracted extensive research interest due to their excellent fluorescent characteristics. In this research, the mercaptopropionic acid capped QDs were linked with monoclonal antibodies via ED…
Nuclear operations with reactors and particle accelerators lead to the generation of neutrons, with a consequent activation of surrounding shielding materials. In general these materials consist of a concrete bioshield with associated metal work from steel reinforcement and support structures. This paper considers the…
Al-substituted M-type hexaferrite is a high anisotropy material. In this paper, we report the co-precipitation synthesis of SrAl 4 Fe 8 O 19 powder and their anisotropy, and magnetic and microwave absorption property. The experiment results indicated that the SrAl 4 Fe 8 O 19 powder required a calcining time of 3 h to…
Established in the 1930s, the Northern Transportation Route (NTR) served to transport pitchblende ore 2,200 km from the Port Radium Mine in Canada’s Northwest Territories to Fort McMurray in Alberta. From there, the ore was shipped 3,000 km by rail to the Town of Port Hope, Ontario, where it was refined for its radium…
Morphologies of blends of poly(styrene) and poly(methyl methacrylate) (PS/PMMA) in the presence of block-graft poly(styrene-b-butadiene)-g-methyl methacrylate (PSbPBgPMMA) copolymers were investigated. Both the PMMA and the terpolymers were obtained through free-radical solution polymerizations of MMA in the presence…
Characterization and simulation of carbon nanotube-reinforced composites at large scale have been a concern of researchers in the past decade. This is due to the computational complication of considering many embedded carbon nanotubes (CNTs). However a simple meshing of organized CNT distribution in the matrix can eas…
实验比较研究了盐酸、硝酸、氢氟酸、高氯酸、硫酸等几种酸以一定的配比混合消解催化剂试样,采用光度法测定试样中贵金属Pt、Pd、Rh的含量。结果表明：采用聚四氟乙烯消化罐,试剂用HCl-HF-H2O2溶解催化剂试样,更利于Pt、Pd、Rh的溶出,Pt、Pd、Rh的回收率分别为99.5%、99.8%、101.6%,相对标准偏差分别为3.04%、2.71%、1.80%。结果满意,方法简便,容易操作。
Nanometer-sized particles possess characteristic physical and chemical properties different from those of bulk materials due to an increase in surface-to-volume ratios as well as of confinement of electrons, excitons, and photons into small volumes. Therefore it is worthwhile to discuss the thermal behaviours of powde…
We demonstrate a plasmonic device that maps the polarization state of light to visible color. Simulations and experiments confirm that varying the illuminating polarization results in marked differences in the chromaticity of the transmitted light.
We report on single dot spectroscopy of (211)B InAs quantum dots, grown by molecular beam epitaxy. The dots exhibit sharp emission lines, the origin of which has been identified. Polarization dependent microphotoluminescence spectra confirm fine structure splittings from 20μeV down to the determination limit of our se…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation O. Itoh, H. Utsunomiya, H. Akimune, T. Yamagata, T. Kondo, M. Kamata, H. Toyokawa, H. Harada, F.…
The morphology of the carbon nanocoils (CNCs) and their catalyst particles were characterized by a transmission electron microscope (TEM) to discuss the growth mechanism of CNCs. The catalyst particles of CNCs have many corner numbers on TEM images. This means that the catalyst particles of CNCs have several facets. I…
Newly prepared cellulose pelargonate samples of various molecular weights were studied in dioxane and chloroform solutions by isothermal translation diffusion, high-speed sedimentation, flow birefringence (Maxwell effect), electric birefringence (Kerr effect), and viscometry. The conformational, hydrodynamic, optical,…
Low processing temperature, homogeneity and high purity are the advantages one attains through hydrolysis and condensation of metal alkoxides to derive oxide glasses when compared with conventional melting techniques. An attempt was also made to explore the effects of varying the aging time of the gels to three years…
Article Crystal structure of aqua(biphenyl-2,4′-dicarboxylato)- manganese(II), Mn(H2O)(C14H8O4) was published on June 1, 2011 in the journal Zeitschrift für Kristallographie - New Crystal Structures (volume 226, issue 2).