Mizutani U.,Nagoya Industrial Science Research Institute |
Inukai M.,Toyota Technological Institute |
Sato H.,Aichi University of Education |
Zijlstra E.S.,University of Kassel
Chemical Society Reviews | Year: 2012
Full-potential linearized augmented plane wave (FLAPW) electronic band calculations were performed for two RT- (rhombic triacontahedron) and five MI- (Mackay icosahedron) type 1/1-1/1-1/1 approximants plus several complex metallic compounds in Al-TM (TM = transition metal element) binary alloy systems in order to elucidate the origin of a pseudogap from the viewpoint of Fermi surface-Brillouin zone (FsBz) interactions. The square of the Fermi diameter (2k F) 2 and square of the critical reciprocal lattice vector G 2 or the critical set of lattice planes, with which electrons at the Fermi level E F are interfering, can be extracted from the FLAPW-Fourier method. We revealed that a pseudogap in both RT- and MI-type 1/1-1/1-1/1 approximants universally originates from interference phenomenon satisfying the matching condition (2k F) 2 = G 2 equal to 50 in units of (2π/a) 2, where a is the lattice constant. The multi-zone effect involving not only G 2 = 50 but also its neighboring ones is also claimed to be responsible for constituting a pseudogap across E F. The value of e/a for Mn, Fe, Re and Ru elements in the periodic table is deduced to be positive in the neighborhood of unity. All 1/1-1/1-1/1 approximants, regardless of RT- or MI-type atomic cluster involved, are stabilized at around e/a= 2.7, while their counterpart quasicrystals are at around e/a= 2.2. A new Hume-Rothery electron concentration rule linking the number of atoms per unit cell, e/uc, with a critical G 2 holds well for all complex intermetallic compounds characterized by a pseudogap at E F. © 2012 The Royal Society of Chemistry. Source
Shimakawa K.,Nagoya Industrial Science Research Institute |
Aniya M.,Kumamoto University
Monatshefte fur Chemie | Year: 2013
A new model that explains the Meyer-Neldel rule of atomic diffusion processes in condensed matter is presented. Phonon absorption and emission processes by diffusing atoms are separately taken into account in the atomic jumping processes whereas in the conventional classical model of diffusion the phonon emission process is not explicitly taken into account. Excitation and relaxation of the accepted phonon modes in the system may cause Meyer-Neldel rule in atomic diffusion processes. It is emphasized that the numbers of atoms in the activated states dominate the diffusion processes. © 2012 Springer-Verlag. Source
Nagoya Industrial Science Research Institute | Date: 2013-01-22
A novel gas separation membrane having excellent gas permeability and gas separation performance, particularly carbon dioxide (CO A gas separation membrane comprising a resin comprising a branched polybenzoxazole has excellent gas permeability and gas separation performance, particularly excellent carbon dioxide (CO
Nippon Zoki Pharmaceutical Co. and Nagoya Industrial Science Research Institute | Date: 2013-04-26
An object of the present invention is to provide an analgesic effective in a prophylactic or a therapy for various pain diseases. The present invention is to provide an analgesic containing at least one member selected from a trans-2-decenoic acid derivative represented by the formula (1) and a pharmaceutically acceptable salt thereof as an active ingredient: (In the formula, Y is O, NR or S, R is hydrogen atom, alkyl group, dialkylaminoalkyl group or the like and W is a substituent such as dialkylaminoalkyl group). The analgesic of the present invention containing the compound as an active ingredient is highly useful as a prophylactic or therapeutic agent for various pain diseases such as the pain caused by osteoarthritis (e.g., knee osteoarthritis and hip osteoarthritis).
Nippon Zoki Pharmaceutical Co. and Nagoya Industrial Science Research Institute | Date: 2011-11-01
An object of the present invention is to provide a novel trans-2-decenoic acid derivative or a pharmaceutically acceptable salt thereof and to provide a pharmaceutical agent which contains said compound as an active ingredient and has a highly safe neurotrophic factor-like activity or an alleviating action for side effect induced by administration of anti-cancer agents. The trans-2-decenoic acid derivative or a pharmaceutically acceptable salt thereof which is the compound of the present invention is specifically represented by the formula (1): (In the formula, Y is O, NR or S, R is hydrogen atom, alkyl group, dialkylaminoalkyl group or the like and W is a substituent such as dialkylaminoalkyl group) and has a quite high usefulness as a pharmaceutical agent such as a preventive or therapeutic agent for dementia, Alzheimers disease, Parkinsons disease, depression, etc., a treating or repairing agent for spinal cord injury.