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Polyelectrolyte Hydrogels for Replacement and Regeneration of Biological Tissues
권혁준,Kazunori Yasuda,Jian Ping Gong,Yoshihiro Ohmiya 한국고분자학회 2014 Macromolecular Research Vol.22 No.3
Polyelectrolyte gels are charged polymer networks with macro-ions fixed on the polymer chains. Thesegels have considerable potential for biological applications such as cellular scaffolds and the replacement of variousbiological tissues. Moreover, high strength up to several tens of megapascals can be obtained with polyelectrolytegels by incorporating double network structure in the gel. This article gives a concise review to introduce thefundamental properties of polyelectrolyte gels and biological applications for tissue engineering using theircharacteristic properties. Applications of polyelectrolyte gels have been highlighted in the fields of artificial muscle,artificial corneas, artificial cartilage, scaffolds for in vitro stem cell culture, and scaffolds for in vivo cartilage regeneration. This review suggests that polyelectrolyte gels would be a useful material for the successful replacement and regenerationof damaged or diseased tissues.
Effect of deflected inflow on flows in a strongly-curved 90 degree elbow
Iwamoto, Yukiharu,Kusuzaki, Ryo,Sogo, Motosuke,Yasuda, Kazunori,Yamano, Hidemasa,Tanaka, Masaaki Korean Society for Fluid machinery 2017 International journal of fluid machinery and syste Vol.10 No.1
Wall pressure measurements and flow visualization were conducted for a 90 degree elbow with an axis curvature radius the same as its inner diameter (125 mm). Reynolds numbers 320,000 and 500,000, based on the inner diameter and bulk velocity, were examined. A deflected inflow, having an almost constant velocity slope and a faster velocity at the inside, was introduced. Ensemble averaged pressure distributions showed that no difference of normalized pressure could be found in both the Reynolds number cases. Power spectral density functions of pressures exhibited that the fluctuation having the Strouhal number (based on the inner diameter and bulk velocity) of 0.6 existed in the downstream region of the elbow, which was 0.1 larger than that of the uniform inflow case [1]. Results of numerical calculations qualitatively coincided with the experimental ones.
Effect of deflected inflow on flows in a stronglycurved 90 degree elbow
Yukiharu Iwamoto,Ryo Kusuzaki,Motosuke Sogo,Kazunori Yasuda,Hidemasa Yamano,Masaaki Tanaka 한국유체기계학회 2017 International journal of fluid machinery and syste Vol.10 No.1
Wall pressure measurements and flow visualization were conducted for a 90 degree elbow with an axis curvature radius the same as its inner diameter (125 mm). Reynolds numbers 320,000 and 500,000, based on the inner diameter and bulk velocity, were examined. A deflected inflow, having an almost constant velocity slope and a faster velocity at the inside, was introduced. Ensemble averaged pressure distributions showed that no difference of normalized pressure could be found in both the Reynolds number cases. Power spectral density functions of pressures exhibited that the fluctuation having the Strouhal number (based on the inner diameter and bulk velocity) of 0.6 existed in the downstream region of the elbow, which was 0.1 larger than that of the uniform inflow case [1]. Results of numerical calculations qualitatively coincided with the experimental ones.