Materials Literature
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Radiofrequency discharge of helium gas at low pressure was employed to modify surface properties of polycarbonate. The effects of process parameters on wettability and plasma etching were determined by monitoring surface energy and weight loss, respectively. Quadratic equations for surface energy and weight loss, in t…
One-dimensional (1D) nanostructures of semiconductor oxides are of interest for various applications including gas sensors. For gas sensors, nanostructures have advantages of improved gas-sensing characteristics and have potential in fabrication of miniature sensor. In this paper, we review some of the work done in ou…
Recently, several important structures have been solved using micro‐crystallographic techniques that previously could not have been solved with conventional crystallography. At GM/CA‐CAT we continue to develop micro‐crystallographic capabilities for difficult problems such as small crystals of large macromolecular com…
This paper reports that single-phase γ-Y 2 Si 2 O 7 is prepared via a sufficient blending and cold-pressed sintering technique from Y 2 O 3 powder and SiO 2 nanopowder. It studies the dielectric properties of γ-Y 2 Si 2 O 7 as a function of the temperature and frequency. The γ-Y 2 Si 2 O 7 exhibits low dielectric loss…
The purpose of this review is to explore the development, applications and outcomes of using plasmadeposited (polymeric) surfaces as culture and delivery vehicles for cells in the replacement, repair and regeneration of damaged tissues. After a brief introduction to biomaterials and cell therapy, examples of the use o…
Some peculiarities of the time and temperature dependences of the high-temperature oxidation of a low-alloyed low-carbon steel covered with a glass coating are studied. The dependences characterizing the oxidation of steel without coating and that covered with it are found to have a similar character. Based on the dat…
We report changes in nanoscale composition and structure in individual ceria zirconia nanoparticles (nominal composition Ce0.7Zr0.3O2), before and after redox treatment, determined by energy dispersive X-ray (EDX) analysis using scanning transmission electron microscopy (STEM) and high resolution transmission electron…
Energetic metal complex, 4-amino-1,2,4-triazole-N 1 (N 2 ) pentaamminecobalt(III) perchlorate, was produced by the anation reaction of aqua pentaamminecobalt(III) perchlorate with 4-amino-1,2,4-triazole. The thermal decomposition of the metal complex and its mixtures with 1,1-diamino-2,2-dinitroethylene (FOX-7) was st…
A monolayer film composed of exfoliated graphite nanoplatelets (xGnPs) was extracted from a chloroform‐water interface and supported on a glass substrate. The nanoplatelets are interconnected at the edges without overlapping forming a very densely packed structure with uniform thickness. Micro‐Raman spectroscopy with…
The kinetics of catalytic decomposition of H2O2 on palladium-carbon catalysts with various deposited metal distributions in carrier (active carbon) porous granules was studied. The activation parameters (E a and A 0) of the process were calculated by the Arrhenius equation. A determining factor for the catalytic proce…
宝石サンゴは日本が主要産出国である数少ない天然資源の一つである．本研究では，宝石サンゴの炭酸塩骨格に対して大型放射光施設SPring-8における放射光蛍光X線分析を適用して，微量元素の組成と二次元分布像を明らかにした．37.6 keV，50 μm角の励起X線を照射した点分析により，骨格中における主要元素のCa，Srに加えて，Ba，I，Mo，Sn，Mn，Zn，Cd，Brの10元素が検出された．マッピング分析においては，Ca及びSrは骨格全体にほぼ均一に分布するのに対して，Ba，I，Moは成長輪よりも微細な粒状構造を示すことが分かった．日本近海産アカサンゴ，地中海産ベニサンゴ，小笠原及びミッドウェイ産深海サンゴの骨格中に含まれる微量元…
The poor solubility of carbon nanotubes in aromatic solvents is a well known issue. This work is concerned with the fundamentals of the dissolution process of carbon nanotubes. Based on previous studies about adsorption of small aromatics on carbon nanotubes, different arrangements and different numbers of aniline mol…
Heterotrinuclear Fe(II)-Cu(II)-Fe(II) complexes [Cu(FcTropOMe)(2)(H(2)O)(2)](OTf)(2) (FcTropOMe = 5-ferrocenyl-2-methoxytropone) (1), [Cu(FcTropNEt(2))(2)](OTf)(2) (FcTropNEt(2) = 2-(N,N-diethylamino)-5-ferrocenyltropone) (2) and [Cu(FcTropNEt)(2)] (FcTropNEt = 2-(N-ethylamino)-5-ferrocenyltroponate) (3) were synthesi…
Numerical model was developed to simulate the microsegregation and phase transformation for an Fe-based multicomponent alloy with peritectic transformation. The present model was based on the simplest one-dimensional free boundary problem and assumed the local equilibrium condition at the interface. In addition, the m…
A bridged silsesquioxane was obtained from a monosilylated precursor derivative of ureidopyrimidinone, which combines self-assembling properties and hydrophobic interaction of a long alkyl linker (10 carbons). The formation of the organic bridge was promoted through dimerisation via the 4 H-bonds of the ureidopyrimidi…
Cecr2 is a transcription factor involved in neurulation and chromatin remodeling. In the present study, the full length of the coding sequence of the chicken orthologue Cecr2 was obtained by RT-PCR. Sequence analysis and alignment showed that it contained an AT hook, as well as a bromodomain which was highly conserved…
We have investigated atmospheric corrosion of a 50 nm layer of iron covered with a thin layer of NaCl by in situ X-ray transmission spectromicroscopy. We find that upon its deliquescence, a small part of the NaCl layer is rapidly transformed into a sodium oxide (NaOH) species. A large part of the sodium and chlorine i…
The coordinate transformation method allows to generate an illusion such that an object appears like another one, the issue being simply termed as illusion optics. It has been demonstrated numerically by the finite element method, and more recently, the practical realization was reported. Illusion devices are approach…
Stable sols with a homogeneous dispersion of ZnO nanoparticles were prepared by heating zinc hydroxide (Zn(OH)2) precipitate in an ethylene glycol solution of zinc nitrate hexahydrate (Zn(NO3)2·6H2O) at 308 K. The formation of ZnO nanoparticles occurred within 1 h when the mixed solution of Zn(OH)2 precipitate and 0.0…
In recent years there have been demands for small, simple, low-power electron sources for applications such as miniature electric propulsion systems, electrodynamic tethers, scientific applications, and spacecraft charge control. To satisfy these demands, we have started the research and development of carbon nanotube…