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Volume 57, Issue 2
Displaying 1-15 of 15 articles from this issue
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2008 Volume 57 Issue 2 Pages 54-56
Published: February 01, 2008
Released on J-STAGE: October 14, 2011
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Akira MIYAKE2008 Volume 57 Issue 2 Pages 57
Published: February 01, 2008
Released on J-STAGE: October 14, 2011
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Yasuhiro MATSUNAGA, Tamiki KOMATSUZAKI2008 Volume 57 Issue 2 Pages 58-61
Published: February 01, 2008
Released on J-STAGE: October 14, 2011
JOURNAL FREE ACCESSA novel method is proposed which quantifies collectivity emerging at coarse-grained space and time scales in multi-scale protein dynamics. This is based on the combination of the principal component (PC) and the finite size Lyapunov exponent (FSLE). This method can systematically assess the coarse-grained dynamics at different scales in the reduced PC space. As an illustrative vehicle, we apply the method to a model protein composed of 46 amino beads with three different types of residues. We show how the motion of the model protein changes depending on the space scales and the choice of degrees of freedom. In particular, anomalous superdiffusion is revealed along the first PC in the unfolded state. The implication of the existence of superdiffusion in the folding dynamics is discussed.View full abstractDownload PDF (1731K) -
Super Water-Repellent Fractal SurfacesKaoru TSUJII2008 Volume 57 Issue 2 Pages 62-65
Published: February 01, 2008
Released on J-STAGE: October 14, 2011
JOURNAL FREE ACCESSFractal, a geometric concept, is a powerful tool to develop some functional materials. When the fractal structure is applied to the wetting, super water-and/or oil-repellent surfaces can be obtained because of their very large surface area. Utilizing wax fine particles having the fractal surface as templates, a fractal body can be also synthesized. This unique novel material is expected to show new functional properties.View full abstractDownload PDF (3137K) -
Jun'ichi MATSUZAWA2008 Volume 57 Issue 2 Pages 66-70
Published: February 01, 2008
Released on J-STAGE: October 14, 2011
JOURNAL FREE ACCESSThe symmetric structures of atoms, molecules and crystals are described in terms of group theory, which gives a method for studying the objects with mathematical structures. This article presents a survey of the applications of group theory in Euclidean geometry, eliiptic geometry and hyperbolic geometry with focusing on discontinuous groups, tessellations, surfaces of constant curvature.View full abstractDownload PDF (2131K) -
Tricontinuous Cubic and Tiling StructuresYushu MATSUSHITA, Tomonari DOTERA2008 Volume 57 Issue 2 Pages 71-75
Published: February 01, 2008
Released on J-STAGE: October 14, 2011
JOURNAL FREE ACCESSTricontinuous cubic structures and tilings with mesoscopic length scale for two kinds of three-component block copolymers with different architectures have been introduced in conjunction with three- and two-dimensional symmetry in crystallography. A typical example of the former is the tricontinuous Gyroid structure, whose space group is /4132, formed by an ABC linear block terpolymer, while the latter are periodic Archimedean tiling structures of (6.6.6), (4.8.8), (4.6.12) and (3.3.4.3.4), whose space group are p3m1, p4mm, p6mm and p4gm, respectively, observed for star-shaped terpolymers of the /1.0S1.0Px type, where I, S and P denote polyisoprene, polystyrene and poly(2-vinylpyridine). Furthermore, a mesoscopic quasicrystalline structure with dodecagonal symmetry has been found for the blend of a star-shaped terpolymer and a homopolymer with the composition of /1.0S2.7P2.5View full abstractDownload PDF (3558K) -
Loop, Replica and CascadeFumihiko TANAKA2008 Volume 57 Issue 2 Pages 76-80
Published: February 01, 2008
Released on J-STAGE: October 14, 2011
JOURNAL FREE ACCESSThis paper sketches the history of interplay between polymer science and mathematics by focusing on three unique mathematical methods utilized in statistical-mechanical studies of polymers, and presents the perspectives for the future. First, we consider the conformational entropy of polymeric loops as the origin of the singularity in Appell's function, and see how the latter characterizes the nature of the phase transitions in the polymer systems. We next review the replica theory of random systems developed in the study of cross-linking of polymer chains and rubber elasticity, including its application to spin glasses, to see how theoretical ideas in polymer science gave impacts on other fields of materials research. Finally, we review the cascade theory of polycondensation reaction leading to gelation, with potential extension to multiple condensation.View full abstractDownload PDF (2007K) -
An Insight with Poincare into Nonlinear Macromolecular ConstructionsYasuyuki TEZUKA2008 Volume 57 Issue 2 Pages 81-85
Published: February 01, 2008
Released on J-STAGE: October 14, 2011
JOURNAL FREE ACCESSBasic principles and recent progress of topological polymer chemistry is outlined. A systematic classification of nonlinear polymer topologies is discussed based on constitutional isomers of alkanes and cycloalkanes. Topological isomerism occurs specifically on randomly coiled, flexible polymer molecules having cyclic and linear structures. An “electrostatic self-assembly and covalent fixation” strategy has been developed to design topologically unique nonlinear polymer constructions.View full abstractDownload PDF (1753K) -
Solitons and Polarons in Conjugated PolymersKazuyoshi TANAKA2008 Volume 57 Issue 2 Pages 86-89
Published: February 01, 2008
Released on J-STAGE: October 14, 2011
JOURNAL FREE ACCESSThis summary explains fundamental aspects of solitons and polarons in conjugated polymers from both mathematical and phenomenologicavl iewpoints. In general, solitons are particulars olutions of non-lineard ifferentiale quation having special characteristics such as particle pictures. Solitons and polarons found in polyacetylene are understood as the kink solitons often found out in solid state materials rather than tsunami-likeso litons. This kink is a kind of elementarye xcitationw hose energy level appears in the band gap region.View full abstractDownload PDF (1526K) -
2008 Volume 57 Issue 2 Pages 90
Published: February 01, 2008
Released on J-STAGE: October 14, 2011
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2008 Volume 57 Issue 2 Pages 90a
Published: February 01, 2008
Released on J-STAGE: October 14, 2011
JOURNAL FREE ACCESSDownload PDF (335K) -
2008 Volume 57 Issue 2 Pages 90b
Published: February 01, 2008
Released on J-STAGE: October 14, 2011
JOURNAL FREE ACCESSDownload PDF (335K) -
2008 Volume 57 Issue 2 Pages 90c
Published: February 01, 2008
Released on J-STAGE: October 14, 2011
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Liquids Confined at the Solid-Liquids InterfaceKazue KURIHARA2008 Volume 57 Issue 2 Pages 91-95
Published: February 01, 2008
Released on J-STAGE: October 14, 2011
JOURNAL FREE ACCESSRecent developments of surface forces measurement are reviewed. The novel surface force apparatus was developed using the twin-path method for nontransparent substrates. New directions of the research include (1) interactions between polymer melts and (2) those between deformable surfaces of liquid droplets; (3) hydrogen-bonded molecular organization called “surface molecular macroclusters” at the solid-liquid interface; (4) resonance shear measurement for nanorheology and nanotribology of confined liquids.View full abstractDownload PDF (2918K) -
Mitsuhiko MORISUE2008 Volume 57 Issue 2 Pages 96
Published: February 01, 2008
Released on J-STAGE: October 14, 2011
JOURNAL FREE ACCESSThe author tells about the story of how he has wandered around several laboratories. Presently, the author has just started another journey, that is an original work of his own with a definite goal to explore a new area of polymer science.View full abstractDownload PDF (1032K)
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