Materials Literature
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The research objects of this paper were to design bolaamphiphilic gelators utilizing a sugar family as a source of solvophilic groups and an azobenzene segment as a solvophobic group and to monitor the aggregation mode utilizing the spectroscopic properties of the azobenzene chromophore. The results indicated that the…
Systematic IR spectroscopic studies were undertaken to investigate the acid–base properties of Cu–Co ferrospinels Cu1−xCoxFe2O4 (x = 0 to 1) employed in phenol methylation to produce 2,6-xylenol. The IR spectra of the ferrospinels reveal that Fe3+ and Co2+ ions are mainly responsible for the various hydroxy groups on…
Composites of xerogel with polyaniline (PANI) are prepared from a vanadyl tris(isopropoxide) precursor and aniline monomer by in situ oxidative polymerization of aniline in the sol solution, followed by gelation with the inorganic oxide. The composite is characterized using Fourier transform infrared spectroscopy, X-r…
The crystallization of synthetic layered magnesium silicate hectorite clays from both silica sol and organosilane sources is compared. For the silica sol-derived clays, a templating method is employed wherein organic or polymeric molecules are included during clay crystallization that are then removed from the composi…
Editors' Foreword. Contents. 1. Introduction: Surface and Interface Science in the New Millennium 2. Fundamental Phenomena at Surfaces and Interfaces 3. New Materials via Surface Processing 4. Frontiers in the Modeling of Surface Processes 5. Surface Dynamics, Growth and Etching 6. Surface Science Tools and their Appl…
キチンやキトサンは創傷治癒促進効果を有し、抗菌活性やマクロファージを活性化させることが知られた活性分子である。我々は、各種創傷に容易に塗布ができ、短時間の紫外線(UV) 照射で不溶性のハイドロゲルを生じる光硬化性キトサン分子を調製した。そのキトサンゲルは各種創傷部を被覆し、創傷部を保護するとともに、治癒を促進することが見い出された。さらにキトサンゲルは生体接着剤として、肺創傷部からの空気漏れや動脈創部からの出血も瞬時に止めることが確認された。このように、光硬化性キトサンハイドロゲルは、新規の創傷被覆剤および生体接着剤として、特に緊急の止血と創傷被覆を要する災害時の緊急医療の場で有用な医療用素材となることが期待できる。
Thin films of various ferroelectric multimetal oxides such as (Bi 1 m x La x ) 4 Ti 3 O 12 (BLT), SrBi 2 Ta 2 O 9 (SBT) and PbZr 1 m x Ti x O 3 (PZT) have been prepared by an entirely aqueous chemical solution deposition (CSD) route. Two critical issues related with aqueous CSD have hereby been worked out: in spite of…
The slip effects of water flow in hydrophilic and hydrophobic microchannels of 1 and 2 μm depth are examined experimentally. Fabrication processes for silicon/Pyrex microchannels were chosen to ensure good control of the channel height and to obtain atomically smooth surfaces. Hydrophilic surfaces were prepared with a…
A Novel compound (Hbpy)2[[(H2O)3Ni(bpy)0.5Ni(bpy)(H2O)4]2[Mo5P2O23] [Ni((bpy)0.5)2(H2O)2][Mo5P2O23]].8H2O 1 (bpy = 4,4'-bipyridine) with an interpenetrating 2D network structure was synthesized hydrothermally and characterized by elemental analyses, IR, X-ray single crystal structure analysis and temperature-dependent…
Pressurized solid oxide fuel cell (PSOFC)/micro gas turbine generator (MTG) hybrid power systems have the potential to generate electric power at high efficiency [circa 60% (net AC/LHV)] at multi-hundred kWe and multi-MWe capacities. Thus, good fuel economy and low CO2 emissions are positive system attributes, as are…
Chlorophyll a extracted from natural Spirulina was adsorbed by mesoporous silica, FSM. The amount adsorbed depended on the pore size. Few chlorophyll molecules were adsorbed by a usual silica gel and FSMs with pore sizes of less than 2 nm. However, more than 10 wt% of chlorophyll was adsorbed by FSMs with larger pore…
The corrosion resistance of the nickel-free high nitrogen austenitic stainless steel without manganese, Fe–23Cr–2Mo–1.5N (mass%) (HNS) as biomaterials, was evaluated by the polarization test in various electrolytes: 0.9%NaCl solution (saline), phosphate buffered saline (PBS(-)), Hanks’ solution (Hanks) and Eagle’s min…
In the present paper, poly(3-hydroxybutyrate-co-3-hydroxyvalerate) nanocapsules were prepared by a double emulsion-solvent evaporation procedure (w/o/ w) for the encapsulation of model enzymes (L-asparaginase, catalase, glucose oxidase) and bovine serum albumin. To increase the encapsulation efficiency and activity of…
N-(2-Hydroxypropyl)methacrylamide (HPMA) copolymer platinates were prepared from polymeric intermediates containing Gly-Phe-Leu-Gly side chains terminating in either malonate or aspartate dicarboxylato ligands. Platinum(II) was bound by reaction of the dicarboxylato ligands with cis-[Pt(NH3)2(H2O)2]2+. The HPMA copoly…
Responses of the epilithic diatom communities to environmental gradients were analysed at 135 river stations in Finland. In addition, the biological quality of the water was evaluated using diatoms in five rivers having different types of human pressures. According to CCA, conductivity, total P, pH and humus content h…
Cathodic behavior of doped with La was investigated in this study for an intermediate temperature solid oxide fuel cell (ITFC). Electrical conductivity of increased monotonically with an increasing amount of La doped for the Ba site at 1073 K Cathodic overpotential at 1073 K decreased with increasing La content and at…
In this paper we have investigated the NO2 gas-sensing properties of LB film assemblies of 5,15-bis(4-aminophenyl)-10,20-bis[3,4-bis(2-ethylhexyloxy)phenyl]-21H,23H-porphine (CAH4). The optical absorbance spectrum of these films is dramatically affected when exposed to low concentrations of NO2 gas. LB films of CAH4 w…
Porous iron whose long cylindrical pores are aligned in one direction has been fabricated by unidirectional solidification of the melt in a pressurized mixture gas of nitrogen and argon. Nitrogen dissolved in the molten iron is rejected at the solid-liquid interface during the solidification due to the solubility diff…
In plane parallel arrangement and enhancement of NLO-activity are observed upon coordination of heteroditopic dipoles containing a phosphole ring on square-planar d8-palladium centre.
Novel ternary diamond-like phases of the B–C–N system were synthesized at pressures up to 30 GPa and temperatures up to 3500 K by static and dynamic compression of graphite-like BN–C solid solutions. The structure and properties of these new phases were studied using analytical transmission electron microscopy (ATEM),…