Tokyo University of Science

About: Tokyo University of Science is a education organization based out in Tokyo, Japan. It is known for research contribution in the topics: Thin film & Enantioselective synthesis. The organization has 15800 authors who have published 24147 publications receiving 438081 citations. The organization is also known as: Tōkyō Rika Daigaku & Science University of Tokyo.

Magnetic Bearings and Bearingless Drives

Abstract: The application of bearingless drives is emerging as an important technique in the areas of high-speed machinery and motion-control, and this book aims to provide a thorough grounding in the principles behind this cutting-edge technology. Basic principles are described in detail with practical examples to aid understanding, and the different types of bearingless drives are introduced, along with coverage of test machines and applications.Aimed at practising electrical and mechanical engineers and advanced students, Magnetic Bearings and Bearingless Drives provides an essential guide to an area of engineering previously only fully covered by large numbers of academic papers. Key Features : Unique and comprehensive coverage of a cutting-edge subject for electrical and mechanical engineers A reference text and survey for designers, manufacturers and users of high-speed motors, generators and electrical drive systems Examines the basic principles behind magnetic bearings, with key technologies and applications illustrated through examples and case studies

The development of a bioengineered organ germ method

Abstract: To bioengineer ectodermal organs such as teeth and whisker follicles, we developed a three-dimensional organ-germ culture method. The bioengineered tooth germ generated a structurally correct tooth, after both in vitro organ culture as well as transplantation under a tooth cavity in vivo, showing penetration of blood vessels and nerve fibers. Our method provides a substantial advance in the development of bioengineered organ replacement strategies and regenerative therapies.

The quiescent intracluster medium in the core of the Perseus cluster

Abstract: The Hitomi collaboration reports X-ray observations of the core of the Perseus cluster of galaxies the brightest X-ray-emitting cluster in the sky. Such clusters typically consist of tens to thousands of galaxies bound together by gravity and are studied as models of both small-scale cosmology and large-scale astrophysical processes. The data reveal a remarkably quiescent atmosphere, where gas velocities are quite low, with a line-of-sight velocity dispersion of about 164 kilometres per second at a distance of 3060 kiloparsecs from the central nucleus.

Novel polyion complex micelles entrapping enzyme molecules in the core: Preparation of narrowly-distributed micelles from lysozyme and poly(ethylene glycol)-poly(aspartic acid) block copolymer in aqueous medium

Abstract: A core−shell-type supramolecular assembly, a polyion complex micelle, was prepared in this study from chicken egg white lysozyme and poly(ethylene glycol)−poly(aspartic acid) block copolymer (PEG-P(Asp)) through electrostatic interaction in aqueous medium. Lysozyme/PEG-P(Asp) micelles thus prepared had an extremely narrow distribution (μ2/Γ2 < 0.04) with an average diameter of 47 nm in dynamic light scattering measurements. No precipitate formation was observed even after 1 month standing at ambient temperature, suggesting that the system is in a thermodynamic equilibrium state. The stoichiometry in terms of the molar ratio of Lys and Arg residues in lysozyme and Asp residues in PEG-P(Asp) was confirmed by dynamic and static light scattering as well as by laser-Doppler electrophoresis measurements. A change in the apparent molar mass of the micelle with varying PEG-P(Asp)/lysozyme ratio in the region with excess lysozyme agreed well with calculated values if a cooperative association mechanism is assumed ...

Single-walled carbon nanotube growth from highly activated metal nanoparticles.

Abstract: We demonstrate that any metal, even gold, silver, and copper, can act as a catalyst for SWCNT synthesis in chemical vapor deposition (CVD). Metal nanoparticles 3 nm or less in diameter, introduced into CVD ambience immediately after heat treatment at 800-950 degrees C in air, produce SWCNTs. The activation method is effective for copper and various noble metals as well as for iron-family elements. This implies that any metal particle may produce SWCNTs when its size becomes 1-3 nm. In other words, carbon atoms can form SWCNTs in a self-assembling fashion on nanoparticles without the specific functions of iron-family elements.