A5091743328- Phase Equilibria and Thermodynamics
- Subcritical and Supercritical Water Processes
- Catalysis and Oxidation Reactions
- Analytical Chemistry and Chromatography
- Photochemistry and Electron Transfer Studies
- Thermodynamic properties of mixtures
- Innovative Microfluidic and Catalytic Techniques Innovation
- Aerogels and thermal insulation
- Spectroscopy and Quantum Chemical Studies
- Advanced Chemical Physics Studies
- biodegradable polymer synthesis and properties
- Polymer Foaming and Composites
- Surfactants and Colloidal Systems
- Crystallization and Solubility Studies
- Carbon dioxide utilization in catalysis
- Luminescence Properties of Advanced Materials
- Ionic liquids properties and applications
- Chemical Thermodynamics and Molecular Structure
- Zeolite Catalysis and Synthesis
- Catalytic Processes in Materials Science
- Iron oxide chemistry and applications
- Thermal and Kinetic Analysis
- Chemical and Physical Properties in Aqueous Solutions
- Silicone and Siloxane Chemistry
- Advanced NMR Techniques and Applications
National Institute of Advanced Industrial Science and Technology
2012-2024
Industrial Research Institute of Ishikawa
2020
Chugoku Rosai Hospital
2017
Nara Medical University
2015
College of Industrial Technology
2010
Nihon University
2002-2010
Sumitomo Chemical (Japan)
1980-2009
Institute of Nanotechnology
2009
Tokyo University of Science
2002-2008
Hirosaki University
2007-2008
Abstract Ozone‐induced graft polymerization was carried out to improve polymer surfaces. The polymers were exposed ozone and the surface density of peroxides formed determined by three methods; iodide, DPPH, peroxidase method. peroxide production could be readily controlled concentration exposure time. In addition, it dependent on kind polymer. Further, seemed probable that oxidation introduced not only outermost but also into a layer deeper from surface. Such polymeric capable initiating...
Liposomes of various phospholipids were prepared using an improved supercritical reverse phase evaporation (ISCRPE) method that utilizes carbon dioxide (scCO2) as alternative to organic solvents. Using this method, in the absence any solvent including ethanol, maximum trapping efficiency glucose reached 36% for 20 mM l-α-dioleoylphosphatidylcholine (DOPC), compared less than 10% Bangham method. by ISCRPE highly stable one month at room temperature. Freeze fractured TEM observations, osmotic...
Biobased nanofiber aerogels are ones of the attractive emerging materials in fields biochemistry and chemistry, but their poor humidity stability due to high hydrophilicity has limited practical uses. In this paper, a new series hydrophobic nanofibrous made from regenerated chitosan alkyl aldehydes were prepared via simple one-pot reaction followed by supercritical drying. Hexanal-modified aerogel shows excellent hydrophobicity with water contact angle ∼136°, low density 0.04–0.07 g cm–3,...
The solubility of terephthalic acid (TPA) in subcritical water was measured as a function the temperature from (349 to 547) K at pressure 10.0 MPa. A semibatch flow apparatus developed for measurement. N-Methylpyrrolidone used good solvent collection TPA saturated without deposition upon cooling. showed an exponential increase with increasing 1.25·10–5 349 2.99·10–2 547 K. aqueous found be lower than those m- and o-phthalic acids by one three orders magnitude, respectively. Gibbs free energy...
Formation of water (W) in supercritical carbon dioxide (scCO2) (W/scCO2) type microemulsions was examined using four hybrid surfactants, the sodium 1-oxo-1-[4-(tridecafluorohexyl)phenyl]-2-alkanesulfonates (FC6-HCn, n = 2, 4, 6, and 8), which have a hydrocarbon chain different length fluorocarbon one molecule an Aerosol-OT (AOT) analogue fluorinated twin tail surfactant, bis(1H,1H,2H,2H-heptadecafluorodecyl)-2-sulfosuccinate (8FS(EO)2). For comparison AOT also used. The surfactants (FC6-HCn)...
High-pressure carbon dioxide in contact with water dissolves to form carbonic acid, causing a decrease pH. By use of these characteristics CO2/H2O biphasic system, chitosan-coated cationic liposomes l-alpha-dipalmitoylphosphatidylcholine were successfully prepared by an improved supercritical reverse-phase evaporation (ISCRPE) method. Liposome-chitosan complexes carrying positive charge single-step procedure without the acid or organic solvent, including ethanol. The maximum trapping...
Continuous hydrothermal synthesis of nickel ferrite nanoparticles from Fe(NO3)3 and Ni(NO3)2 was performed using a central collision-type micromixer developed for rapid heating starting solution to the reaction temperature homogeneous nucleation. Temperature, residence time, nitrate molality were varied in ranges 573–673 K, 0.02–2.00 s, 0.05–0.50 mol/kg, respectively. The effects temperature, molality, NaOH addition on conversion, Ni/Fe molar ratio, particle size, crystal phase examined ICP...
l-α-Dipalmitoylphosphatidylcholine (DPPC) and l-α-dioleoylphosphatidylcholine (DOPC) liposomes were prepared using the previously developed supercritical reverse phase evaporation (scRPE) method. The effects of phospholipid structure, preparation pressure, amount ethanol on their physicochemical properties examined measurements trapping efficiency, cloud point, dynamic light scattering, osmotic water transport. efficiencies DOPC higher than those DPPC due to bulky structure. maximum...
We have examined the interfacial properties of several fluorinated surfactants in a water/CO2 mixture with pendant drop tensiometer and revealed relationships between properties, surfactant structure, microemulsifying power. employed following Aerosol-OT analogue that two tails: bis(1H,1H,5H-octafluoropentyl)-2-sulfosuccinate (di-HCF4), sodium bis(1H,1H,9H-hexadecafluorononyl)-2-sulfosuccinate (di-HCF8), bis(1H,1H,2H,2H-heptadecafluorodecyl)-2-sulfosuccinate (8FS(EO)2),...
The effects of the structural factors surfactants such as CO2-philic tail length and molecular structure on formation water-in-supercritical CO2 (W/scCO2) type microemulsions were examined at various temperatures pressures for fluorinated Aerosol-OT (AOT) analogue surfactants, sodium bis(1H,1H,5H-octafluoropentyl)-2-sulfosuccinate (di-HCF4), bis(1H,1H,7H-dodecafluoroheptyl)-2-sulfosuccinate (di-HCF6), bis(1H,1H,9H-hexadecafluorononyl)-2-sulfosuccinate (di-HCF8),...
The effects of surfactant mixing on interfacial tension and microemulsion formation were examined for systems air/water water/supercritical CO2 (scCO2) interfaces water/scCO2 microemulsions. A fluorinated surfactant, sodium bis(1H,1H,2H,2H-heptadecafluorodecyl)-2-sulfosuccinate (8FS(EO)2), was mixed with the three hydrocarbon surfactants, Pluronic L31, Tergitol TMN-6, decyltrimethylammonium chloride (DeTAC), at equimolar ratio. For all cases, significantly lowered by mixing. positive...
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTGas-Responsive Photoluminescence of YVO4:Eu3+ Nanoparticles Dispersed in an Ultralight, Three-Dimensional Nanofiber NetworkSatoru Takeshita*, Yoshihiro Takebayashi, Hiroyuki Nakamura, and Satoshi YodaView Author Information Research Institute for Chemical Process Technology, National Advanced Industrial Science Technology (AIST), Central 5, 1-1-1 Higashi, Tsukuba 305-8565, Japan*S. Takeshita. E-mail: [email protected]Cite this: Chem. Mater....
Silica–titania aerogels were prepared by impregnating titanium tetraisopropoxide modified with acetylacetone into a silica alcogel followed supercritical drying. The effects of the impregnation conditions, drying medium (ethanol, 2-propanol or CO2) and calcination temperature on homogeneity aerogel nature impregnated titania investigated. Aerogels in this way had large specific surface areas maximum contents ca. 32 at%. Ethanol CO2 dried samples homogeneous, but inhomogeneous because...
Phase behavior was investigated for water/supercritical CO 2 (W/scCO2) microemulsions stabilized with sodium bis(1H,1H,2H,2H-heptadecafluorodecyl)-2-sulfosuccinate (8FS(EO) 2) mixed various guest surfactants. Only the mixtures fluorocarbon-hydrocarbon hybrid anionic surfactants (FC6-HC n), maximum water-to-surfactant molar ratio (W0(c)) larger than that estimated from linear interpolation of W0(c) values pure 8FS(EO) and surfactant. Fourier transform infrared (FT-IR) measurement...
Abstract Despite some slight differences in symptomatology, differential diagnosis of methamphetamine-induced psychosis (MAP) versus schizophrenia can be challenging because both disorders present a large overlap their clinical symptoms. However, recent study has shown that near-infrared spectroscopy (NIRS) performed during cognitive task powerful tool to differentiate between these two disorders. Here, we evaluated verbal fluency performance NIRS 15 patients diagnosed with MAP and 19...
The solubilities of five organic semiconductors and four nonsteroidal anti-inflammatory drugs (NSAIDs) were measured by a static analytical method in set seven representative solvents at 298.15 K 0.10 MPa to determine the Hansen solubility parameter (HSP) solutes quantitative correlation with extended model. Solubilities (N,N′-di-1-naphthyl-N,N′-diphenylbenzidine (NPB), 4,4′-bis(9H-carbazol-9-yl)biphenyl (CBP), anthracene, tetracene, perylene) exhibited similar solvent dependence each other,...
UV/visible absorption spectroscopy was applied to measure the microscopic solvent dipolarity/polarizability, π*, and hydrogen-bond-acceptor basicity, β, parameters of supercritical CO2/n-alcohol mixtures. Experiments were conducted at 45 °C by varying pressure between 86 230 bar, type n-alcohol from methanol n-hexanol, mole fraction, x2, 0 0.05. The effect our experimental conditions on maximum Δπ* changes can be represented in following order: system (Δπ* ≈ 0.4) > fraction 0.3) 0.1)....