Materials Literature
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Recent studies of the chemical modification of chitosan are discussed from the viewpoint of biomedical applications. In this review are presented the current applications of the various types of chitosan derivatives synthesized in the field of drug delivery vehicle, tissue engineering, wound dressing material, antimic…
Crystallization of biological macromolecules is becoming increasingly automated. However, for various reasons, many laboratories still perform at least some aspects of the work manually. A typical crystallization project entails two distinct steps: screening and optimization. The aim of the initial phase is to screen…
Summary The present study was undertaken to investigate the effect of Asparagus racemosus Willd. (Family: Lilliaceae), on depression in mice using tail suspension test (TST) and forced swim test (FST). Methanolic extract (50, 100 and 200 mg/kg p.o.) of A. racemosus administered orally for 14 successive days decreased…
The evolvement of preparative methods in structural studies has always been as important as the development of sophisticated equipment. Software development is also a significant part for three-dimensional (3D) structural studies using electron tomography methods (ETMs). Advanced computing makes amenable procedures th…
The equation of substance balance and the set of boundary and initial conditions determine the transient diffusion problem within the homogenized textile structure. Introducing an arbitrary behavioral functional, its first-order sensitivity expressions can be stated using the material derivative concept and both the d…
This paper describes a dynamically reconfigurable 8-function logic gate (CNT-DR8F) based on a double-gate carbon nanotube field effect transistor (DG-CNTFET). The design is based on a property specific to this device: ambivalence, enabling p-type or n-type behavior depending on the back-gate voltage. Using available m…
This paper proposes a novel method to enhance the emission characteristics of carbon nanotubes (CNTs). It is extremely possible for CNTs to adsorb moisture and other contaminants during the fabrication processes, leading to the degraded field emission characteristics. In this work, CNT emitters are activated with comm…
Commingled polypropylene (PP)/banana granules were fabricated from slivers by mixing PP fibers and banana fibers by textile equipment. By twisting the sliver, the reinforcing fibers were compacted and bonded with the molten matrix material. PP/banana composites were prepared from commingled PP/banana granules by injec…
Highly selective syntheses of tri(2,4-dimethyl-3-carbethoxypyrrolyl)-methane 8 and its dipyrrolic intermediate 6 and pyrrolic one 1 are described based on the successful correction of the wrong process for 1 in literature. Tripyrrolic compounds have attracted much attention recently and been developed in diverse field…
Effects of alloy addition on magnetic anisotropies in non-grain oriented electrical steels were investigated. Tin and antimony improved magnetic induction and iron loss but increased anisotropy of magnetic induction and lessened anisotropy of iron less. Texture effect was evaluated as texture factor expressing as a ra…
The effect of phosphorus (P) on magnetic properties and also on recrystallization texture of non-oriented electrical steel sheets has been investigated to develop core materials with low core loss and high permeability. Specimens containing different amounts of P were cold-rolled to various thicknesses, i.e. with vari…
A range of complex nanostructures have been observed by the self-assembly of carbon nitride nanocrystals, which involved an increase of the structural complexity from 0D → 1D → 2D → 3D evolution.
Gel combustion synthesis was investigated on rare earth aluminates, especially gadolinium aluminate, by adjusting Gd/Al ratios in mixed nitrate aqueous solution and the kinds of fuel. Use of urea as the fuel was essential to obtain the crystallized oxides as the combustion products in any Gd/Al compositions although g…
New type of detection system has been designed and tested in the Scanning Electron Microscope. Backscattered electrons (BSE) at low energies of electron impact are collected by an annular detector above the specimen, consisting of eight concentric ring-shaped collectors arranged around the optical axis so that polar a…
The low temperature magnetic properties of Pb2MnO4, which crystallises in an acentric but non-polar space group (P21c) that allows piezoelectricity, have been investigated. Magnetisation measurements reveal a sharp transition to an antiferromagnetically ordered state at 18 K. Powder neutron diffraction at 1.5 K shows…
層間陰イオンの異なる4種類のMg/Al系ハイドロタルサイト様化合物（HT）をMg/Al=2.5の条件下で共沈法により合成し，得られたHTのpH緩衝作用について検討した．4種類のHTのpH緩衝作用により，Mg–Al–SO42−HT(pH 9.0)>Mg–Al–CO32−HT(pH 8.5)>Mg–Al–NO3−HT(pH 8.0)>Mg–Al–Cl−HT(pH 7.6)の順に高いpHで一定になる．2価の陰イオンを取り込んだMg–Al–SO42−HT，Mg–Al–CO32−HTは，1価の陰イオンを取り込んだMg–Al–Cl−HTとMg–Al–NO3−HTと比べて，緩衝作用により高いpH値を示す．これは，HT中からSO42−やCO32−…
We present an empirical model based on the solubility of zinc and temperature to explain the observed variations in density and length of hydrothermally grown zinc oxide ͑ZnO͒ nanorods on GaN substrate as reported by Le et al. ͓J.Cryst.Growth, 293, 36 ͑2006͔͒.The ionic equilibrium of the growth solution is solved nume…
For the first time a comparative study of holographic recording in planarly oriented films of nematic and cholesteric azobenzene‐containing polymers was performed. The influence of temperature and light intensity on the values of diffraction efficiencies of holographic gratings was investigated. The kinetics of gratin…
We report on the experimental observation of surface plasmon resonance in Cu nanowires fabricated by shadow deposition method. When the incident light is polarized perpendicular to the wire axes, plasmon maxima appeared at about 2.3 eV in the absorption spectra. Plasmon resonance appeared at lower photon energy when t…
Dynamic in situ spectroscopic ellipsometry is used to probe post-deposition nano-structural changes in silver films at room temperature in the pre- and post-coalescence stages of Volmer-Weber growth. In the island growth phase the Maxwell-Garnett theory is used to determine structural changes in the island film. Chang…