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Preparation of Heparin/hydroxyapatite (HAp) nanocomposites using simulated body fluids (SBFs) were investigated with respect to effect of solution pH and heparin concentrations. Various physical characterizations using FT-IR spectroscopy, scanning electron microscopy, energy-dispersive X-ray spectroscopy, and X-ray diffraction study revealed that heparin/HAp nanocomposites were obtained when SBF was incubated with heparin at pH 7.4. On the other hand, heparin/amorphous calcium phosphate nanocomposites were obtained by incubation at pH 8.4. These results support that heterogeneous nucleation of HAp induced by heparin occurred dominantly when incubated at pH 7.4, whereas majority of calcium phosphate deposits were produced by homogeneous nucleation at pH 8.4.

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Recently, the researches of medical techniques are paid attention to the regeneration medicines, regenerating the damaged body tissue in vitro cell culture and following tissue reconstructions. Therefore, the novel cell scaffolds for controlling the cell proliferation and differentiation more efficiently are desired. In this research, Imogolite, an inorganic nanotube, was estimated as novel cell scaffolds for osteoblast-like cell, MC 3T3-E1.

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The superplasticity deformation of hydroxyapatite (Ca₁₀(PO₄)₆OH₂;HAp) with B₂O₃ addition has been investigated in this research. The pulse current pressure sintering of HAp compact with B₂O₃ addition was conducted at 1000ºC for 10 min. Relative densities of the HAp ceramic materials with B₂O₃ addition were kept being 99%, regardless of the difference in amount of B₂O₃ of 1-10 mol%. The tensile strains of the sintered HAp specimen with 3 mol% B₂O₃ addition were as high as 580% at the strain rates of 1.5×10^-4-2.4×10^-3 s^-1.

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We showed clearly that the taste component of green tea changes with surface conditions of a kyusu teapot. The mechanism which affects a taste component was for not a component like glutamic acid but polyphenol with a functional group like catechin to adsorb on the surface of a teapot. When it BET-adsorbs and catechin chemisorbs on the surface of a teapot showed that the presentation of a taste component changed and the taste of change sushi and tea differed in the relative presentation of the taste component of the tea brewed with the teapot. The identification result by XRD and FTIR was a weddellite.

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The microstructure of heat stable Al2O3 catalyst and its development at high temperatures are examined. The novel porous ceramics are fabricated via metastable alumina, and its solid state reactions with highly dispersed nano-particles.

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The oxygen storage capacity (osc) of ceria zirconia comosite powders synthesized by coprecipitation process was investigated. The phase, and its mixture and microstructure of catalysts and its development were related to osc properties.

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VOCs such as toluene are causative substance in industrial and ordinary sites. Several adsorbents including zeolites for air cleaning are effective and widely used in civil and industrial processes. We evaluated the adsorption and desorption characteristics of toluene on some zeolite using TPD-MS method.

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We have succeeded in developing metal oxide surfaces which show a high dynamic hydrophobicity despite a relatively low static hydrophobicity. Dynamic solid-liquid interaction as a liquid droplet-movement on inclined surfaces, which are developed inorganic oxide films and general organic films, is investigated. The liquid droplet movement is affected by a surface energy, roughness, and homogeneity of the solid surface. Furthermore, it is suggested that the internal fluidity detected by Particle Image Velocimetry method determined the rate. The movement also depends on the shape of a droplet, which possibly changes the internal flow drastically. In this presentation, we will discuss the detail of relations among them.

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The structural evolution of FeCO3 (siderite) at high temperatures has been investigated by the single-crystal X-ray diffraction technique. Decarbonation of siderite occurred with increasing temperature, resulting in the formation of iron oxide crystals, -Fe2O3 (hematite) and Fe3O4 (magnetite). Both iron oxide crystals were found to have the topotaxial orientation relation to the siderite mother crystal.

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(Lax,Sr1-x)CrO3 (LSC) has been eagerly anticipated for use in SOFC interconnect-applications. However it is difficult to fabricate LSC bulk ceramics by sintering technique because of its high sintering temperature over 1873 K. Compared with deposition rate of the LSC film using the normal AD technique, deposition rate of the film using the plasma assisted AD technique was increased up to 5 times. Compared with Vickers hardness of the LSC film using the normal AD technique, the hardness of the film using the plasma assisted AD technique was increased up to 3 times.

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The effects of mesoporous silica (MS) addition with low thermal conductivity on the thermoelectric properties of Nb-doped SrTiO₃ bulk materials were discussed. Nb-doped SrTiO₃ bulk materials with the different contents of MS addition were fabricated by the conventional normal pressure sintering method in an Ar atmosphere. It is found that MS addition can reduce thermal conductivity and enhance electrical conductivity significantly. Meanwhile, Seebeck coefficient is almost independent of MS addition, and hence ZT value is enhanced obviously. The sample with 5vol% MS gives the maximum ZT value, 0.165 at 900K. The possible reason for the reduction of thermal conductivity and the enhancement of electrical conductivity by MS addition was also investigated.

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The effects of period of NaOH treatment, concentration of HCl and temperature of heat treatment on surface structure of Ti metal were investigated. A fine network structure of sodium hydrogen titanate was formed on its surface by the first NaOH treatment. It transformed into hydrogen titanate, but its structure unchanged by second HCl treatment. It converted into anatase and rutile by final heat treatment. Thickness and pore size increased with increasing soaking period of NaOH treatment. Rutile / anatase ratio decreased with increasing period of NaOH treatment, while it increased with increasing HCl concentration and the heat treatment temperature. Zeta potentials increased with increasing HCl concentration, and temperature of the heat treatment up to 700ºC and decreased at 800ºC.

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ZnO nanocrystals(NCs) have attracted increasing attention recently because it is nontoxic, chemically stable towards air and inexpensive luminescent material (blue/UV optoelectronics, including light-emitting or even laser diodes) instead of the GaN-based structures. However, in general, two emission peaks appear in the ultraviolet (UV) and visible region in the photoluminescence (PL) spectra of ZnO QDs because of surface states or a trapping effect. In this study, we synthesized the ZnO NCs provided two step process using a microreactor and consider effects of aging on visible region PL to obtain ultraviolet emission.

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LaSr2Fe3-yCryO9-δ powder was synthesized using glycine-nitrate process. A perovskite single-phase as well as submicron sized particles can be ascertained for the prepared powders. The structure, electrical conducting, thermal expansion and electrochemical performance of the specimens have been investigated with respect to the mole contents of Cr. It was found that there is a monotone decrease of the electrical conductivity as well as thermal expansion values with increasing values of y. As to the electrochemical properties, the polarization resistances determined by the three electrodes half cell gradually increase with increasing Cr contents. The specimens with y=0 and 0.2 offer excellent polarization resistances of lower than 0.1 Ω at 800°C, which can be considered as the promising candidate for the IT-SOFC cathode.

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