Patents Assigned to Japan Atomic Energy Research
  • Patent number: 8232353
    Abstract: A polymer film substrate is irradiated with ions to make a large number of nano-sized through-holes and the substrate may be further irradiated with ionizing radiation so that a functional monomer may be grafted or co-grafted onto a surface of the film and within the holes; in addition, sulfonic acid group(s) may be introduced into the graft chains to produce a polymer ion-exchange membrane that may have high oxidation resistance, dimensional stability, electrical conductivity and/or methanol resistance, as well as may have an ion-exchange capacity controlled over a wide range.
    Type: Grant
    Filed: August 21, 2007
    Date of Patent: July 31, 2012
    Assignee: Japan Atomic Energy Research Institute
    Inventors: Masaru Yoshida, Tetsuya Yamaki, Masaharu Asano, Yosuke Morita
  • Patent number: 7981168
    Abstract: Ceramic materials that are highly resistant to strong acids such as concentrated sulfuric acid and halides such as hydrogen iodide are employed to make block elements through which a large number of circular ingress channels extend in perpendicular directions and which are joined and piled in the heat exchanging medium section to provide a compact heat exchanger that excels not only in corrosion resistance but also in high-temperature strength.
    Type: Grant
    Filed: September 18, 2008
    Date of Patent: July 19, 2011
    Assignees: Japan Atomic Energy Research Institute, Kabushiki Kaisha Toshiba
    Inventors: Shintaro Ishiyama, Shigeki Maruyama
  • Patent number: 7906083
    Abstract: A zirconium-loaded fibrous adsorbent material having phosphoryl groups which is produced by first grafting a reactive monomer having phosphoryl groups onto a polymeric substrate and then loading zirconium. One or more methods of using the zirconium-loaded fibrous adsorbent material to recover arsenic, phosphoric ions, and/or fluoride ions are disclosed.
    Type: Grant
    Filed: January 2, 2008
    Date of Patent: March 15, 2011
    Assignee: Japan Atomic Energy Research Institute
    Inventors: Noriaki Seko, Masao Tamada
  • Patent number: 7819973
    Abstract: A method comprising the steps of continuously changing the concentrations in solution of a biomacromolecule to be crystallized and a precipitant, thereby constructing a crystal phase diagram containing a solubility curve, searching for optimum conditions of crystallization on the basis of the constructed crystal phase diagram, and performing efficient growth of the crystal of the biomacromolecule. Also disclosed is an apparatus for implementing the method.
    Type: Grant
    Filed: June 21, 2006
    Date of Patent: October 26, 2010
    Assignee: Japan Atomic Energy Research Institute
    Inventors: Nobuo Niimura, Yuki Onishi, Shigeki Arai, Toshiyuki Chatake, Mitsuru Maeda, Kazuo Kurihara
  • Patent number: 7731927
    Abstract: A method by which ceramic nanowires with diameters ranging from several to several tens of nanometers can be synthesized with improvements in the shape retention of the nanowires and the yield of conversion to ceramic, which method comprises the steps of forming a thin film of a silicon-containing polymer usable as a ceramic precursor, irradiating the thin film with ion beams to form cylindrical crosslinked portions, extracting the un-crosslinked portions with a solvent to produce nanowires of the silicon-containing polymer, irradiating the nanowires with an ionizing radiation so that they are crosslinked again, and firing the re-crosslinked nanowires.
    Type: Grant
    Filed: September 14, 2006
    Date of Patent: June 8, 2010
    Assignee: Japan Atomic Energy Research Institute
    Inventors: Masaki Sugimoto, Masahito Yoshikawa, Shuhei Seki, Satoshi Tsukuda, Seiichi Tagawa
  • Patent number: 7679064
    Abstract: The characteristics of the phosphor ZnS:Ag,Cl which has a considerably high fluorescence yield in response to incident particles thus allowing for their easy detection are used as such and combined with the finding that the fluorescence components in the range of shorter wavelengths are short-lived, which led to an improvement of counting characteristics, hence allowing for high-rate measurements of particles. When B370 was used as an optical filter to pick up fluorescence components shorter than 450 nm, the decay time of short-lived fluorescence components could be reduced from 370 ns to 200 ns.
    Type: Grant
    Filed: April 13, 2005
    Date of Patent: March 16, 2010
    Assignee: Japan Atomic Energy Research Institute
    Inventor: Masaki Katagiri
  • Patent number: 7655834
    Abstract: By analyzing the causative gene of tt19 mutants and elucidating the nature of the mutants, the present inventors found a novel gene as the causative gene and gave it the name TRANSPARENT TESTA (TT19) gene. The inventors cloned this gene and analyzed its DNA nucleotide sequence as well as the protein encoded by its DNA. The inventors also provided a transformed plant utilizing the nature of the identified causative gene.
    Type: Grant
    Filed: March 11, 2004
    Date of Patent: February 2, 2010
    Assignee: Japan Atomic Energy Research Institute
    Inventors: Satoshi Kitamura, Naoya Shikazono, Atsushi Tanaka
  • Patent number: 7651576
    Abstract: The method of preventing cold-worked stress corrosion cracking in the iron steels and alloyed steels including stainless steels comprises removing a residual tensile stressed layer, optionally generating residual compression, through the impact of irradiation with the ultra-short femtosecond pulse and kW class high average-power laser, and removing a hardened surface layer extremely susceptible to stress corrosion cracking, whereby this susceptible hardened surface layer with many concentrated dislocation defects and the likes is removed without generating or introducing any of such hardened layer in the process of its removal. The method is free from the risk of damaging other equipment by peening with steel balls or other shaped shots, is almost unlimited in actual environment, effectiveness, work, place and other conditions for application, is inexpensive, and functions continuously for a much longer period than an ordinary nuclear reactor's service lifetimes.
    Type: Grant
    Filed: August 30, 2005
    Date of Patent: January 26, 2010
    Assignee: Japan Atomic Energy Research Institute
    Inventors: Eisuke Minehara, Akihiko Nishimura, Takashi Tsukada
  • Patent number: 7582057
    Abstract: Endoscopic system 40 comprises composite optical fiber 34 that consists of a large-diameter, laser light transmitting optical fiber surrounded by a large number of image transmitting fibers that are bundled together to form an integral assembly with the central fiber, laser applying and image observing optical unit 42 that is connected to the eyepiece portion of said composite optical fiber such that it launches laser light into said large-diameter optical fiber and that the image being transmitted through said image transmitting optical fiber is focused on a camera to become observable, and an illuminating light transmitting unit that transmits illuminating light to the tip of the objective portion of said composite optical fiber for irradiation purposes.
    Type: Grant
    Filed: February 22, 2005
    Date of Patent: September 1, 2009
    Assignees: Japan Atomic Energy Research Institute, Fujikura Ltd., Kawasaki Jukogyo Kabushiki Kaisha
    Inventors: Tomoaki Toriya, Takashi Tsumanuma, Kenichi Nakatate, Takashi Ishii, Kiyoshi Oka, Toshio Osaki, Akiyoshi Hayakawa
  • Publication number: 20090085260
    Abstract: A biodegradable aliphatic polyester, such as polylactic acid, is mixed with a monomer having allyl and molded into a molding having the crosslinking degree of the biodegradable aliphatic polyester increased. Thereafter, the molding is exposed to ionizing radiation to thereby obtain a molding excelling in heat resistance. Triallyl isocyanurate or triallyl cyanurate is used as the monomer having allyl.
    Type: Application
    Filed: November 24, 2008
    Publication date: April 2, 2009
    Applicants: JAPAN ATOMIC ENERGY RESEARCH INSTITUTE, SUMITOMO ELECTRIC FINE POLYMER INC
    Inventors: Naotsugu NAGASAWA, Toshiaki Yagi, Fumio Yoshii, Shin-ichi Kanazawa, Kiyoshi Kawano, Yoshihiro Nakatani, Hiroshi Mitomo
  • Publication number: 20090025919
    Abstract: Ceramic materials that are highly resistant to strong acids such as concentrated sulfuric acid and halides such as hydrogen iodide are employed to make block elements through which a large number of circular ingress channels extend in perpendicular directions and which are joined and piled in the heat exchanging medium section to provide a compact heat exchanger that excels not only in corrosion resistance but also in high-temperature strength.
    Type: Application
    Filed: September 18, 2008
    Publication date: January 29, 2009
    Applicant: Japan Atomic Energy Research Institute
    Inventors: Shintaro Ishiyama, Shigeki Maruyama
  • Publication number: 20080290036
    Abstract: A zirconium-loaded fibrous adsorbent material having phosphoryl groups which is produced by first grafting a reactive monomer having phosphoryl groups onto a polymeric substrate and then loading zirconium. One or more methods of using the zirconium-loaded fibrous adsorbent material to recover arsenic, phosphoric ions, and/or fluoride ions are disclosed.
    Type: Application
    Filed: January 2, 2008
    Publication date: November 27, 2008
    Applicant: Japan Atomic Energy Research Institute
    Inventors: Noriaki Seko, Masao Tamada
  • Patent number: 7361462
    Abstract: The present invention is directed to directly measure distribution in vivo and the frequency of generation in vivo of DNA strand breaks which induce cell death and mutations. The present inventors accomplished the present invention by providing a method for detecting a DNA strand break in a sample, which comprises a step of binding a PprA protein derived from Deinococcus radiodurans to a DNA strand break and a step of detecting the PprA protein which is bound to the DNA strand break; as well as by providing a kit for detecting a DNA strand break in a sample which comprises PprA proteins derived from Deinococcus radiodurans and a means for detecting a PprA protein which is bound to a DNA strand break.
    Type: Grant
    Filed: September 17, 2003
    Date of Patent: April 22, 2008
    Assignee: Japan Atomic Energy Research Institute
    Inventors: Katsuya Satoh, Seiichi Wada, Issay Narumi, Masahiro Kikuchi, Tomoo Funayama, Yasuhiko Kobayashi
  • Publication number: 20080033069
    Abstract: A polymer film substrate is irradiated with ions to make a large number of nano-sized through-holes and the substrate may be further irradiated with ionizing radiation so that a functional monomer may be grafted or co-grafted onto a surface of the film and within the holes; in addition, sulfonic acid group(s) may be introduced into the graft chains to produce a polymer ion-exchange membrane that may have high oxidation resistance, dimensional stability, electrical conductivity and/or methanol resistance, as well as may have an ion-exchange capacity controlled over a wide range.
    Type: Application
    Filed: August 21, 2007
    Publication date: February 7, 2008
    Applicant: JAPAN ATOMIC ENERGY RESEARCH INSTITUTE
    Inventors: Yoshida Masaru, Yamaki Tetsuya, Asano Masaharu, Morita Yosuke
  • Patent number: 7326933
    Abstract: A radiation or neutron detector wherein lateral side light detecting optical fibers prepared from clear optical fibers that are scraped on a lateral side to permit side incidence of fluorescence are used to detect the fluorescence from a phosphor or a scintillator such that the background to gamma-rays is reduced. If desired, the optical fibers may be bent at 90 degrees and guided to a photomultiplier tube in order to reduce the size of the detector. Fabrication and maintenance of the detector can be facilitated by adopting such a design that a detecting block comprising a detection medium and lateral side light detecting optical fibers is separated from a readout block comprising clear optical fibers.
    Type: Grant
    Filed: December 18, 2006
    Date of Patent: February 5, 2008
    Assignee: Japan Atomic Energy Research Institute
    Inventors: Masaki Katagiri, Masahito Matsubayashi
  • Patent number: 7307157
    Abstract: A process for producing a chitin derivative and/or a chitosan derivative that have a crosslinked structure, which comprises irradiating a paste of a mixture consisting of 100 parts by weight of a chitin derivative and/or a chitosan derivative and 3˜1,000 parts by weight of purified water.
    Type: Grant
    Filed: January 4, 2005
    Date of Patent: December 11, 2007
    Assignee: Japan Atomic Energy Research Institute
    Inventors: Fumio Yoshii, Naotsugu Nagasawa, Tamikazu Kume, Hiroshi Mitomo
  • Publication number: 20070278413
    Abstract: A radiation or neutron detector wherein lateral side light detecting optical fibers prepared from clear optical fibers that are scraped on a lateral side to permit side incidence of fluorescence are used to detect the fluorescence from a phosphor or a scintillator such that the background to gamma-rays is reduced. If desired, the optical fibers may be bent at 90 degrees and guided to a photomultiplier tube in order to reduce the size of the detector. Fabrication and maintenance of the detector can be facilitated by adopting such a design that a detecting block comprising a detection medium and lateral side light detecting optical fibers is separated from a readout block comprising clear optical fibers.
    Type: Application
    Filed: December 18, 2006
    Publication date: December 6, 2007
    Applicant: JAPAN ATOMIC ENERGY RESEARCH INSTITUTE
    Inventors: Masaki Katagiri, Masahito Matsubayashi
  • Patent number: 7294250
    Abstract: A very small amount of copper chloride or zinc oxide is added to a mixture of magnesium chloride, potassium chloride, sodium chloride and magnesium borate, a mixed salt is melted under heat, electrodes are inserted into a molten salt and a metallic material employed as a cathode is electroplated with a magnesium diboride (MgB2) film.
    Type: Grant
    Filed: June 8, 2004
    Date of Patent: November 13, 2007
    Assignee: Japan Atomic Energy Research Institute
    Inventors: Hideki Abe, Hideaki Kitazawa, Kenji Yoshii, Junichiro Mizuki
  • Patent number: 7294198
    Abstract: A process for producing single-crystal gallium nitride comprising the steps of performing congruent melting of gallium nitride at a high pressure between 6×104 atm. and 10×104 atm. and at a high temperature between 2,200° C. and 2,500° C. and then slowly cooling the obtained gallium nitride melt at the stated high pressure.
    Type: Grant
    Filed: July 16, 2004
    Date of Patent: November 13, 2007
    Assignee: Japan Atomic Energy Research Institute
    Inventors: Wataru Utsumi, Hiroyuki Saitoh, Katsutoshi Aoki
  • Patent number: 7276561
    Abstract: A polymer film substrate is irradiated with ions to make a large number of nano-sized through-holes and the substrate is further irradiated with an ionizing radiation so that a functional monomer is grafted or co-grafted onto a surface of the film and within the holes; in addition, the sulfonic acid group is introduced into the graft chains, thereby producing a polymer ion-exchange membrane that has high oxidation resistance, dimensional stability, electrical conductivity and methanol resistance, as well as an ion-exchange capacity controlled over a wide range.
    Type: Grant
    Filed: August 6, 2004
    Date of Patent: October 2, 2007
    Assignee: Japan Atomic Energy Research Institute
    Inventors: Masaru Yoshida, Tetsuya Yamaki, Masaharu Asano, Yosuke Morita