A5022218593- Surfactants and Colloidal Systems
- Hydrogels: synthesis, properties, applications
- Material Dynamics and Properties
- Blood properties and coagulation
- Thermodynamic properties of mixtures
- Phase Equilibria and Thermodynamics
- Advanced Polymer Synthesis and Characterization
- Rheology and Fluid Dynamics Studies
- Proteins in Food Systems
- Polysaccharides Composition and Applications
- Electrostatics and Colloid Interactions
- Erythrocyte Function and Pathophysiology
- Liquid Crystal Research Advancements
- Adsorption, diffusion, and thermodynamic properties of materials
- Electrospun Nanofibers in Biomedical Applications
- Theoretical and Computational Physics
- Supramolecular Self-Assembly in Materials
- Nanoparticle-Based Drug Delivery
- Collagen: Extraction and Characterization
- biodegradable polymer synthesis and properties
- Analytical Chemistry and Chromatography
- Polymer composites and self-healing
- Synthesis and properties of polymers
- Pickering emulsions and particle stabilization
- Polysaccharides and Plant Cell Walls
Gunma University
2015-2024
Kiryu University
1998-2024
Graduate School USA
2018
Hokkaido University
1978-2010
Sumitomo Osaka Cement (Japan)
2006-2007
Nara Institute of Science and Technology
2006
Ritsumeikan University
2006
Osaka University
2006
Fujifilm (Japan)
2002-2003
State University of New York
1996
We have measured coexistence curves for the system polystyrene–methylcyclohexane with varying molecular weight from Mw=1.02×104 to 71.9×104. In temperature range ε=(Tc−T)/Tc≳0.03, a deviation simple scaling was observed systems Mw=10.9∼71.9×104. The effect of correction terms on negligibly small Mw=1.02∼4.64×104. This finding is compatible dependence critical value ε validity Landau theory. appropriate range, where contribution negligible, an analysis by gives exponent β=0.332±0.001...
We have measured the coexistence curve of a high-molecular-weight (${M}_{w}=1.56\ifmmode\times\else\texttimes\fi{}{10}^{6}$) polystyrene in cyclohexane over temperature range $4\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}5}<\frac{({T}_{c}\ensuremath{-}T)}{{T}_{c}}<4\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}2}$. The concentration difference ${X}^{+}\ensuremath{-}{X}^{\ensuremath{-}}$, volume fraction polystyrene, was well represented by expression...
It was more than 50 years ago that an appearance of birefringence in alginate gels prepared under cation flow reported for the first time, however, anisotropic structure gel has not been studied detail. In present study, Ca-alginate were within dialysis tubing a high Ca2+-concentration external bath, and optical small-angle X-ray scattering (SAXS) measurements performed to characterize gel. The observations with crossed polarizers circular revealed molecular orientation perpendicular...
A method for quantitative analysis of monosaccharides including N-acetylneuraminic acid derived from sialic acid-containing oligosaccharides and glycoproteins is presented. The based on the combination chemical enzymatic methods coupled with capillary electrophoretic (CE) separation laser-induced fluorescence (LIF) detection. present utilizes a simplified hydrolysis procedure consisting mild (0.1 M TFA) to release strong (2.0 N produce amino neutral sugars. Amino sugars released were...
Curdlan dissolved in aqueous sodium hydroxide was dialyzed to calcium chloride form a gel. Transparent and turbid concentric layers observed the gel cross section perpendicular long axis of dialysis tube were identified as liquid crystalline gels with refractive index gradient amorphous gels, respectively. The thickness each layer proportional diameter tube, gelation proceeded proportion root time. unique pattern formation attributed change curdlan conformation calcium-induced cross-linking...
Comparison of coexistence curves observed and calculated from the classical free energy was made for systems polystyrene–methylcyclohexane polystyrene–cyclohexane. Classical determined molecular weight dependence critical point. At low weight, numerically curve well represented by leading term with exponent β=1/2. The shape is very different one because comparable values coefficient β calculated. high entire fairly described one. This fair description caused large value compared narrow range...
We have found that dialysis of 5 mg/mL collagen solution into the phosphate with a pH 7.1 and an ionic strength 151 mM [corrected] at 25 °C results in gel birefringence tubular pores aligned parallel to growth direction gel. The time course averaged diameter during anisotropic gelation was expressed by power law exponent 1/3, suggesting formation is attributed spinodal decomposition-like phase separation. Small angle light scattering patterns high resolution confocal laser scanning...
Coexistence curve measurements were made on the systems of polystyrene (PS) in methylcyclohexane (MC) by using refractive index method. The entire shape coexistence ternary system PS I(Mw=1.72×104)–PS II(Mw=7.19×105)–MC with ξ2=0.1704 is very different from those binary PS(I)–MC and PS(II)–MC, where ξ2 denotes a volume fraction PS(II) to total polystyrene. asymptotic near critical point was found be characterized exponent βt=0.384±0.004, which close fully renormalized exponent. direction tie...
In order to obtain a gelatin hydrogel crosslinked by reagent-free method, gamma-ray and electron beam radiation was applied porcine, bovine fish gels the products were characterized measuring gel fraction, swelling ratio enzymatic degradability. On increasing dose, fraction increased both degradability decreased. The transition temperature from sol of containing more than 5% mammal gelatins up 90 degrees C when or irradiated 10 kGy. results show that degree crosslinking hydrogels increases...
DNA liquid crystalline gel (LCG) has been newly prepared by a dialysis of concentrated solutions into metal cation solutions. The condition for forming LCG is examined means the insolubilization reaction. shrinking ratio and thickness layer, delta, diameter tube, d0, do not depend on d0. adsorption one carcinogenic agents, acridine orange demonstrated. From experimental results, mechanism DNALCG discussed.
The processes of gelation and liquid crystalline formation in the dialysis Curdlan solution have been observed under crossed nicols, calcium concentration pH inner were traced. results showed that occurred simultaneously to form gel (LCG), but birefringence LCG increased even after gelation, suggesting further ordering molecules. On basis ion diffusion, a simple theory for time development thickness layer was developed. experimental theoretical agree very well until an amorphous (AG) ring...
DNA liquid crystalline gel (LCG) films have been prepared by immersing aqueous borate solutions sandwiched between two circular glass plates into cobalt chloride solutions. The time courses of the thickness, weight fractions and cations, birefringence turbidity film consisted outer LCG inner amorphous or solution measured. To clarify mechanism process forming LCG, theory based on nonequilibrium thermodynamics with "moving boundary picture" [Langmuir 2005, 21, 8155-8160] was modified, results...