The Experts below are selected from a list of 615 Experts worldwide ranked by ideXlab platform
Masayoshi Watanabe - One of the best experts on this subject based on the ideXlab platform.
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Thermosensitive soft glassy colloidal arrays of block-copolymer-grafted silica nanoparticles in an ionic liquid
Polymer Journal, 2016Co-Authors: Kazuhide Ueno, Toshimichi Fukai, Masayoshi WatanabeAbstract:A short-range-ordered, soft glassy colloidal array (SGCA) exhibits angle-independent and non-iridescent structural color. To control the angle-independent structural color using external stimuli, a thermosensitive SGCA composed of block copolymer, poly(benzyl methacrylate)- block -poly(methyl methacrylate) (PBnMA- b -PMMA), grafted silica nanoparticles was prepared in an ionic liquid. The thermosensitive properties were studied over a wide range of particle concentrations and temperatures. In the dilute suspension, the outer PBnMA blocks shrunk at high temperatures because of their lower critical solution temperature behavior, whereas the inner PMMA blocks gave rise to steric repulsion, stabilizing the particles against aggregation even at the high temperatures. A blue shift of the reflection peak with increasing temperature was observed for the glassy arrays at semidilute particle concentrations; however, an opposite red shift was observed at high particle concentrations. This unexpected red shift in the highly concentrated suspension was interpreted as swelling of the inner PMMA blocks associated with the desolvation and segregation of thermosensitive PBnMA blocks in the outermost region of the particles. This temperature-sensitive continuous shift of the reflection peak demonstrates the potential application of thermosensitive SGCAs as structural colored materials. A short-range-ordered, soft glassy colloidal array (SGCA) exhibits angle-independent and non-iridescent structural color. To control the angle-independent structural color by external stimuli, a thermosensitive SGCA composed of block copolymer (poly(benzyl methacrylate)- block -poly(methyl methacrylate), PBnMA- b -PMMA) grafted silica nanoparticles was prepared in an ionic liquid. The glassy arrays showed a blue shift of reflection peak at semidilute particle concentrations, but an opposite red shift at high particle concentrations with increasing temperature.
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Thermosensitive soft glassy colloidal arrays of block-copolymer-grafted silica nanoparticles in an ionic liquid
Polymer Journal, 2015Co-Authors: Kazuhide Ueno, Toshimichi Fukai, Masayoshi WatanabeAbstract:A short-range-ordered, soft glassy colloidal array (SGCA) exhibits angle-independent and non-iridescent structural color. To control the angle-independent structural color by external stimuli, a thermosensitive SGCA composed of block copolymer (poly(benzyl methacrylate)-block-poly(methyl methacrylate), PBnMA-b-PMMA) grafted silica nanoparticles was prepared in an ionic liquid. The glassy arrays showed a blue shift of reflection peak at semidilute particle concentrations, but an opposite red shift at high particle concentrations with increasing temperature.
Kazuhide Ueno - One of the best experts on this subject based on the ideXlab platform.
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Thermosensitive soft glassy colloidal arrays of block-copolymer-grafted silica nanoparticles in an ionic liquid
Polymer Journal, 2016Co-Authors: Kazuhide Ueno, Toshimichi Fukai, Masayoshi WatanabeAbstract:A short-range-ordered, soft glassy colloidal array (SGCA) exhibits angle-independent and non-iridescent structural color. To control the angle-independent structural color using external stimuli, a thermosensitive SGCA composed of block copolymer, poly(benzyl methacrylate)- block -poly(methyl methacrylate) (PBnMA- b -PMMA), grafted silica nanoparticles was prepared in an ionic liquid. The thermosensitive properties were studied over a wide range of particle concentrations and temperatures. In the dilute suspension, the outer PBnMA blocks shrunk at high temperatures because of their lower critical solution temperature behavior, whereas the inner PMMA blocks gave rise to steric repulsion, stabilizing the particles against aggregation even at the high temperatures. A blue shift of the reflection peak with increasing temperature was observed for the glassy arrays at semidilute particle concentrations; however, an opposite red shift was observed at high particle concentrations. This unexpected red shift in the highly concentrated suspension was interpreted as swelling of the inner PMMA blocks associated with the desolvation and segregation of thermosensitive PBnMA blocks in the outermost region of the particles. This temperature-sensitive continuous shift of the reflection peak demonstrates the potential application of thermosensitive SGCAs as structural colored materials. A short-range-ordered, soft glassy colloidal array (SGCA) exhibits angle-independent and non-iridescent structural color. To control the angle-independent structural color by external stimuli, a thermosensitive SGCA composed of block copolymer (poly(benzyl methacrylate)- block -poly(methyl methacrylate), PBnMA- b -PMMA) grafted silica nanoparticles was prepared in an ionic liquid. The glassy arrays showed a blue shift of reflection peak at semidilute particle concentrations, but an opposite red shift at high particle concentrations with increasing temperature.
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Thermosensitive soft glassy colloidal arrays of block-copolymer-grafted silica nanoparticles in an ionic liquid
Polymer Journal, 2015Co-Authors: Kazuhide Ueno, Toshimichi Fukai, Masayoshi WatanabeAbstract:A short-range-ordered, soft glassy colloidal array (SGCA) exhibits angle-independent and non-iridescent structural color. To control the angle-independent structural color by external stimuli, a thermosensitive SGCA composed of block copolymer (poly(benzyl methacrylate)-block-poly(methyl methacrylate), PBnMA-b-PMMA) grafted silica nanoparticles was prepared in an ionic liquid. The glassy arrays showed a blue shift of reflection peak at semidilute particle concentrations, but an opposite red shift at high particle concentrations with increasing temperature.
Toshimichi Fukai - One of the best experts on this subject based on the ideXlab platform.
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Thermosensitive soft glassy colloidal arrays of block-copolymer-grafted silica nanoparticles in an ionic liquid
Polymer Journal, 2016Co-Authors: Kazuhide Ueno, Toshimichi Fukai, Masayoshi WatanabeAbstract:A short-range-ordered, soft glassy colloidal array (SGCA) exhibits angle-independent and non-iridescent structural color. To control the angle-independent structural color using external stimuli, a thermosensitive SGCA composed of block copolymer, poly(benzyl methacrylate)- block -poly(methyl methacrylate) (PBnMA- b -PMMA), grafted silica nanoparticles was prepared in an ionic liquid. The thermosensitive properties were studied over a wide range of particle concentrations and temperatures. In the dilute suspension, the outer PBnMA blocks shrunk at high temperatures because of their lower critical solution temperature behavior, whereas the inner PMMA blocks gave rise to steric repulsion, stabilizing the particles against aggregation even at the high temperatures. A blue shift of the reflection peak with increasing temperature was observed for the glassy arrays at semidilute particle concentrations; however, an opposite red shift was observed at high particle concentrations. This unexpected red shift in the highly concentrated suspension was interpreted as swelling of the inner PMMA blocks associated with the desolvation and segregation of thermosensitive PBnMA blocks in the outermost region of the particles. This temperature-sensitive continuous shift of the reflection peak demonstrates the potential application of thermosensitive SGCAs as structural colored materials. A short-range-ordered, soft glassy colloidal array (SGCA) exhibits angle-independent and non-iridescent structural color. To control the angle-independent structural color by external stimuli, a thermosensitive SGCA composed of block copolymer (poly(benzyl methacrylate)- block -poly(methyl methacrylate), PBnMA- b -PMMA) grafted silica nanoparticles was prepared in an ionic liquid. The glassy arrays showed a blue shift of reflection peak at semidilute particle concentrations, but an opposite red shift at high particle concentrations with increasing temperature.
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Thermosensitive soft glassy colloidal arrays of block-copolymer-grafted silica nanoparticles in an ionic liquid
Polymer Journal, 2015Co-Authors: Kazuhide Ueno, Toshimichi Fukai, Masayoshi WatanabeAbstract:A short-range-ordered, soft glassy colloidal array (SGCA) exhibits angle-independent and non-iridescent structural color. To control the angle-independent structural color by external stimuli, a thermosensitive SGCA composed of block copolymer (poly(benzyl methacrylate)-block-poly(methyl methacrylate), PBnMA-b-PMMA) grafted silica nanoparticles was prepared in an ionic liquid. The glassy arrays showed a blue shift of reflection peak at semidilute particle concentrations, but an opposite red shift at high particle concentrations with increasing temperature.
Ipsita Mandal - One of the best experts on this subject based on the ideXlab platform.
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Super-GCA from N=(2,2) super-Virasoro
Physics Letters B, 2016Co-Authors: Ipsita Mandal, Ahmed RayyanAbstract:Abstract We derive the extended Supersymmetric Galilean Conformal Algebra (SGCA) in two spacetime dimensions by the method of group contraction on 2 d N = ( 2 , 2 ) superconformal algebra. Both the parent and daughter algebras are infinite-dimensional. We provide the representation theory of the algebra. We adopt a superspace formalism for the SGCA fields, allowing us to write them down in a compact notation as components of superfields. We also discuss correlation functions, short supermultiplets and null states.
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Supersymmetric extension of GCA in 2d
Journal of High Energy Physics, 2010Co-Authors: Ipsita MandalAbstract:We derive the infinite dimensional Supersymmetric Galilean Conformal Algebra (SGCA) in the case of two spacetime dimensions by performing group contraction on 2d superconformal algebra. We also obtain the representations of the generators in terms of superspace coordinates. Here we find realisations of the SGCA by considering scaling limits of certain 2d SCFTs which are non-unitary and have their left and right central charges become large in magnitude and opposite in sign. We focus on the Neveu-Schwarz sector of the parent SCFTs and develop, in parallel to the GCA studies recently in (hepth/0912.1090), the representation theory based on SGCA primaries, Ward identities for their correlation functions and their descendants which are null states.
M. Van Putten - One of the best experts on this subject based on the ideXlab platform.
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Impaired muscle function and integrity in SGCA- and SGCD-null mice.
2017Co-Authors: S. Pasteuning-vuhman, K. Putker, C. Tanganyika-de L. Winter, J. Boertje-van Der W. Meulen, L. Van Vliet, M. Overzier, J. J. Plomp, A. Aartsma-rus, M. Van PuttenAbstract:(a) Normalized four limb grip strength was significantly lower in SGCD-null mice than in wild type and SGCA-null mice (b) Maximum hanging time with two limbs was significantly shorter in SGCA- and SGCD-null mice when compared to wild type mice. SGCD-null mice outperformed SGCA-null mice. Maximum hanging time was significantly shorter in male SGCD-null mice than in female SGCD-null mice. (c) Maximum hanging time with four limbs was significantly shorter in SGCA- and SGCD-null mice when compared to wild type mice. SGCD-null mice outperformed SGCA-null mice. Maximum hanging time was significantly shorter in male SGCD-null mice than in female SGCD-null mice. (d) Creatine kinase levels were significantly elevated in both LGMD strains. (e) No significant differences were detected in respiration amplitude between the mouse models. (f) Respiration rate was significantly decreased in SGCA- and SGCD-null mice at 15 and 34 weeks of age compared to wild type mice. At 15 and 34 weeks of age, SGCA-null mice showed significantly lower respiration rate than SGCD-null mice. No differences were found between males (in blue) and females (in pink). (g) Force frequency relationship of the tibialis anterior muscle. Each data point represents the force measured at each frequency. Muscles of both SGCA- and SGCD-null mice showed a significantly lower specific force than those of wild type mice. SGCD-null muscles generated a significantly lower specific force than those of SGCA-null mice. (h) Relative changes in tetanic force during eleven cycles of eccentric contraction in tibialis anterior muscle. The tetanic tension developed during the first cycle was taken as 100%. The isometric force significantly dropped by 10–15% in SGCA- and SGCD-null mice, while it remained unchanged in wild type mice. For e and f * Indicates a significant difference from wild type (WT) controls. # Indicates a significant difference from SGCA-null mice. Error bars represent standard error of the mean (± SEM).
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Smaller fiber sizes and increased muscle regeneration in SGCA- and SGCD-null mice.
2017Co-Authors: S. Pasteuning-vuhman, K. Putker, C. Tanganyika-de L. Winter, J. Boertje-van Der W. Meulen, L. Van Vliet, M. Overzier, J. J. Plomp, A. Aartsma-rus, M. Van PuttenAbstract:(a) Fiber size distribution of skeletal muscles of 34-week-old SGCA-null, SGCD-null and wild type mice. Values represent relative number of fibers in a given diameter class (10 μm/class). The fiber size distribution was shifted to smaller fibers in SGCA- and SGCD-null mice when compared to wild type mice in gastrocnemius, tibialis anterior and diaphragm muscles. Fiber size distribution did not differ between male and female SGCD-null mice. (b) Immunofluorescent images of diaphragm muscles stained with embryonic myosin heavy chain (eMHC) (regenerative marker, green) and laminin (extracellular matrix of muscle fibres, red) Scale bar: 100 μm. (c) Increase in myogenic gene expression (Myh3, Myog, Stat3 and Myod) measured by qPCR and normalized to Gapdh in skeletal muscles of 34-week-old SGCA-null, female and male SGCD-null mice when compared to wild type mice (all n = 5 mice per group). Q, quadriceps; GC, gastrocnemius; TA, tibialis anterior; Dia, diaphragm. * Indicates a significant difference from WT controls. # Indicates a significant difference from female SGCD-null mice Error bars represent standard deviation (±SD).
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MSTN/TGF-β signalling contributes to LGMD disease pathology.
2017Co-Authors: S. Pasteuning-vuhman, K. Putker, C. Tanganyika-de L. Winter, J. Boertje-van Der W. Meulen, L. Van Vliet, M. Overzier, J. J. Plomp, A. Aartsma-rus, M. Van PuttenAbstract:(a) Gene expression analysis of three Tgf-β isoforms and Mstn. Tgf-β1, Tgf-β2 and Tgf-β3 levels were significantly higher in diaphragm muscles of LGMD compared to wild type, while they did not differ in gastrocnemius muscles. Mstn levels were significantly lower in gastrocnemius and diaphragm muscles of LGMD mice. (b) Gene expression analysis of type II receptors Acvr2a, Acvr2b and Tgfbr2. Acvr2a levels were upregulated in male SGCD-null compared to wild type and female SGCD-null diaphragm muscles. Acvr2b levels were significantly higher in diaphragm muscles of SGCD-null males compared to females. Tgfbr2 expression was significantly increased in gastrocnemius and diaphragm muscles of LGMD compared to wild type mice. (c) qPCR analysis of type I receptors: Alk1, Alk4 and Alk5. Alk1 levels were upregulated in LGMD gastrocnemius and SGCA- and male SGCD-null diaphragm muscles compared to wild type muscles. Alk4 was significantly increased in diaphragm muscles of LGMD mice relative to wild type. In addition, Alk4 levels were significantly lower in SGCD-null females than males. Alk5 was significantly higher in diaphragm muscles of SGCA- and female SGCD-null mice relative to wild type and male SGCD-null mice. Data were normalized to Gapdh (all n = 5 mice per group). GC, gastrocnemius; Dia, diaphragm. * Indicates a significant difference from WT controls. # Indicates a significant difference from male SGCD-null mice. Error bars represent ± SD.
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Elevated collagen levels in skeletal muscles in SGCA- and SGCD-null mice and in the heart of SGCD-null mice.
2017Co-Authors: S. Pasteuning-vuhman, K. Putker, C. Tanganyika-de L. Winter, J. Boertje-van Der W. Meulen, L. Van Vliet, M. Overzier, J. J. Plomp, A. Aartsma-rus, M. Van PuttenAbstract:(a) Immunofluorescent images of skeletal muscles stained with collagen type I (fibrotic marker, green) and laminin (extracellular matrix of muscle fibres, red) Scale bar: 100 μm. (b) Quantification of collagen type I positive area in skeletal muscles relative to wild type muscles. A significant increase in the percentage of collagen type I positive area was found in diaphragm and quadriceps muscles of SGCA- and SGCD-null mice, while no difference was found in the gastrocnemius. Tibialis anterior muscles of female SGCD-null mice showed a significant increase in collagen type I positive area compared to wild type. (c) Fibrotic and inflammatory gene expression measured by qPCR, normalized to Gapdh (n = 5 mice per group) in skeletal muscles of LGMD and wild type mice. A significant increase in Col1a1 and Cd68 expression was found in SGCA- and SGCD-null muscles when compared to wild type muscles. (d) Immunofluorescence images of the heart stained with collagen type I (fibrotic marker, green). Scale bar: 1000 μm. (e) The percentage of collagen type I positive area, measured with Image J was significantly increased in SGCD-null mice compared to wild type mice; males showed a significantly higher increase in collagen than did female SGCD-null mice. Q, quadriceps; GC, gastrocnemius; TA, tibialis anterior; Dia, diaphragm. * Indicates a significant difference from WT controls. # Indicates a significant difference from female SGCD-null mice. Error bars represent ± SD.
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Accumulation of fat infiltrates in LGMD strains.
2017Co-Authors: S. Pasteuning-vuhman, K. Putker, C. Tanganyika-de L. Winter, J. Boertje-van Der W. Meulen, L. Van Vliet, M. Overzier, J. J. Plomp, A. Aartsma-rus, M. Van PuttenAbstract:(a) Immunofluorescent images of skeletal muscles stained with Nile-red (infiltrated lipids, red) Scale bar: 100 μm (b) Quantification of the immunofluorescent areas. A significant increase in Nile red -positive areas (n = 5 mice per group) was found in SGCD-null diaphragm and SGCA-null gastrocnemius muscles when compared to wild type muscles. (c) Adipogenic gene expression measured by qPCR, normalized to Gapdh (n = 5 mice per group). Upregulation of adipogenic gene expression (Adipoq, Ppar-gamma, Atgl) was found in diaphragm muscle of both LGMD strains and Hsl was significantly upregulated in SGCA-null diaphragm muscle compared to wild type. Q, quadriceps; GC, gastrocnemius; TA, tibialis anterior; Dia, diaphragm. * Indicates significant difference from WT controls. Error bars represent ± SD.