Patents Assigned to Iwate University
-
Patent number: 9023283Abstract: A separate excitation and high sensitive resonant type mass sensor is provided. The resonant type mass sensor 1 includes: an oscillator 3; an vibrator 2 placed on the oscillator 3; and a detecting unit 5 for detecting the resonant frequency of the vibrator 2, and is characterized in that the vibrator 2 and the oscillator 3 are not coupled mechanically and that the vibrator 2 is not mechanically coupled to any members. The vibration of the vibrator 2 is represented by a standing wave. The vibrator 2 includes a molecular recognition means for recognizing the molecules of a substance to be measured. The molecular recognition means may collect specific molecules by antigen-antibody reaction. The vibrator 2 may include at least a magnetizable part. To the magnetizable part, magnetic beads 26, to which an antibody or antigen is immobilized, may be adsorbed magnetically.Type: GrantFiled: November 15, 2013Date of Patent: May 5, 2015Assignee: Incorporated National University Iwate UniversityInventor: Masaki Yamaguchi
-
Patent number: 8962705Abstract: A method for removing cauxin in cat urine and a material for removing cauxin are provided. The material for removing cauxin in cat urine comprises a polymer substrate on which surface a trifluoroketone derivative is immobilized via dithiol.Type: GrantFiled: February 17, 2011Date of Patent: February 24, 2015Assignees: National University Corporation Chiba University, Incorporated National University Iwate University, Nippon Zenyaku Kogyo Co., Ltd.Inventors: Shinya Matsuno, Kyoichi Saito, Tetsuro Yamashita, Ayako Ito, Yasuyuki Suzuta
-
Patent number: 8956565Abstract: The invention provides a flake graphite cast iron being highly strong and excellent in workability such as cutting performance, which is suitable for use, for example, in internal combustion engine parts and the like, and a production method thereof without using a misch metal. Specifically, the flake graphite cast iron according to the invention includes an A-type graphite with a uniformly and disorderly distributed existence form without directionality; and has a chemical composition containing 2.8 to 4.0 mass % of C, 1.2 to 3.0 mass % of Si, 1.1 to 3.0 mass % of Mn, 0.01 to 0.6 mass % of P, 0.01 to 0.30 mass % of S and the remainder being Fe and inevitable impurities, wherein the ratio (Mn/S) of the Mn content to the S content is within a range of 3 to 300.Type: GrantFiled: June 25, 2008Date of Patent: February 17, 2015Assignees: Incorporated National University Iwate University, Nippon Piston Ring Co., Ltd.Inventors: Hiroshi Horie, Toshinori Kowata, Yoshiki Ishikawa
-
Publication number: 20140234171Abstract: A separate excitation and high sensitive resonant type mass sensor is provided. The resonant type mass sensor 1 includes: an oscillator 3; an vibrator 2 placed on the oscillator 3; and a detecting unit 5 for detecting the resonant frequency of the vibrator 2, and is characterized in that the vibrator 2 and the oscillator 3 are not coupled mechanically and that the vibrator 2 is not mechanically coupled to any members. The vibration of the vibrator 2 is represented by a standing wave. The vibrator 2 includes a molecular recognition means for recognizing the molecules of a substance to be measured. The molecular recognition means may collect specific molecules by antigen-antibody reaction. The vibrator 2 may include at least a magnetizable part. To the magnetizable part, magnetic beads 26, to which an antibody or antigen is immobilized, may be adsorbed magnetically.Type: ApplicationFiled: November 15, 2013Publication date: August 21, 2014Applicant: Incorporated National University Iwate UniversityInventor: Masaki Yamaguchi
-
Publication number: 20140093779Abstract: An object of the present invention is to provide a negative-electrode active material for lithium-ion secondary battery, negative-electrode active material which makes it possible for lithium-ion secondary batteries to exhibit higher capacities, and which makes it feasible to charge and discharge lithium-ion secondary batteries at a faster speed. In a production process according to the present invention, oxidized titanium fluoride is obtained by heating a mixed raw material, which includes a mixture of anatase-type TiO2 and hydrofluoric acid, at 70° C. or more (i.e., a heating step). This mixed raw material includes hydrogen fluoride in an amount exceeding 2 mol per the anatase-type TiO2 making 1 mol. When the oxidized titanium fluoride, which is obtained by this production process, is used as a negative-electrode active material of lithium-ion secondary battery, high-capacity and rapidly-chargeable/dischargeable lithium-ion secondary batteries are obtainable.Type: ApplicationFiled: November 5, 2013Publication date: April 3, 2014Applicants: Incorporated National University Iwate University, Kabushiki Kaisha Toyota JidoshokkiInventors: Seung-Taek MYUNG, Naoto YASUDA, Hitotoshi MURASE
-
Patent number: 8415163Abstract: Disclosed is a method of diagnosing renal dysfunction in a cat by removing cauxin from cat urine and detecting a protein in the cat urine sample from which cauxin has been removed. Cauxin is removed from cat urine by bringing the cat urine into contact with a lectin or with an anti-cauxin antibody that specifically binds to cauxin. Cauxin may be removed using a column filled with a carrier that is bound to the lectin or to the anti-cauxin antibody. The lectin may be Lens culinaris lectin. Detection of the cat urinary protein from which cauxin has been removed is performed with a urine test strip.Type: GrantFiled: August 16, 2012Date of Patent: April 9, 2013Assignees: Incorporated National University Iwate University, Nippon Zenyaku Kogyo Co., Ltd.Inventors: Tetsuro Yamashita, Yasuyuki Suzuta
-
Patent number: 8380466Abstract: A large-scale sound system or communication system is numerically and stably identified. When an input signal is represented by the M(?N)-th order AR model, high-speed H? filtering can be performed with a computational complex 3N+O(M). A processing section determines the initial state of a recursive equation (S201), sets CUk according to an input uk (S205), determines a variable recursively (S207), updates a matrix GkN, calculates an auxiliary gain matrix KUkN (S209), divides it (S211), calculates a variable DkM and a backward prediction error ?m, k (S213), calculate a gain matrix Kk (S215), and updates a filter equation of a high-speed H? filter (S217). To reduce the computational complexity, Kk(:, 1)/(1+&ggr;f?2 Hk Kk (:, 1)) is directly used as the filter gain Ks, k.Type: GrantFiled: April 12, 2007Date of Patent: February 19, 2013Assignee: Incorporated National University Iwate UniversityInventor: Kiyoshi Nishiyama
-
Publication number: 20120301345Abstract: The invention provides a flake graphite cast iron being highly strong and excellent in workability such as cutting performance, which is suitable for use, for example, in internal combustion engine parts and the like, and a production method thereof without using a misch metal. Specifically, the flake graphite cast iron according to the invention includes an A-type graphite with a uniformly and disorderly distributed existence form without directionality; and has a chemical composition containing 2.8 to 4.0 mass % of C, 1.2 to 3.0 mass % of Si, 1.1 to 3.0 mass % of Mn, 0.01 to 0.6 mass % of P, 0.01 to 0.30 mass % of S and the remainder being Fe and inevitable impurities, wherein the ratio (Mn/S) of the Mn content to the S content is within a range of 3 to 300.Type: ApplicationFiled: August 2, 2012Publication date: November 29, 2012Applicants: Nippon Piston Ring Co., Ltd., Incorporated National University Iwate UniversityInventors: Hiroshi Horie, Toshinori Kowata, Yoshiki Ishikawa
-
Patent number: 8268639Abstract: A method for diagnosing a kidney disease in a cat by detecting a cat urinary protein without being affected by cauxin, and a diagnostic agent therefor are provided. A method of detecting a urinary protein derived from renal dysfunction in a cat according to claim 1, wherein cauxin is removed from cat urine by bringing the cat urine into contact with a lectin or an anti-cauxin antibody that specifically binds to cauxin.Type: GrantFiled: July 20, 2007Date of Patent: September 18, 2012Assignees: Incorporated National University Iwate University, Nippon Zenyaku Kogyo Co., Ltd.Inventors: Tetsuro Yamashita, Yasuyuki Suzuta
-
Patent number: 8150558Abstract: The temperature of an object is controlled by a feedback control algorithm based on the temperature control characteristics of a homeothermic plant.Type: GrantFiled: December 8, 2004Date of Patent: April 3, 2012Assignee: Iwate UniversityInventors: Kikukatsu Ito, Takanori Ito, Hiroshi Osada, Shigeki Chiba
-
Patent number: 7985713Abstract: A magnesium boride thin film having a B-rich composition represented by the general formula of MgBx (x=1 to 10) and a superconducting transition temperature of 10K or more has superior crystallinity and orientation and is used as a superconducting material. This thin film is formed by maintaining a film forming environment in a high vacuum atmosphere of 4×10?5 Pa or less, and simultaneously depositing Mg and B on a substrate maintained at a temperature of 200° C. or less so as to grow the film at a growth rate of 0.05 nm/sec or less. It is preferable to supply an Mg vapor and a B vapor into the film forming environment at an Mg/B molar ratio of 1/1 to 12/1.Type: GrantFiled: March 22, 2006Date of Patent: July 26, 2011Assignee: Incorporated National University Iwate UniversityInventors: Yoshitomo Harada, Masahito Yoshizawa, Haruyuki Endo
-
Patent number: 7973379Abstract: A photovoltaic ultraviolet sensor comprises a zinc oxide single crystal substrate. On the +c face of the zinc oxide single crystal substrate, an ultraviolet receiver is formed. The exemplary ultraviolet receiver includes a Schottky electrode which, when receiving ultraviolet rays, produces a voltage in cooperation with the zinc oxide single crystal substrate. The ultraviolet sensor does not have any sensitivity to the visible rays. The ultraviolet sensor has a relatively fast response of several microseconds.Type: GrantFiled: March 23, 2006Date of Patent: July 5, 2011Assignees: Citizen Holdings Co., Ltd., Local Independent Administrative Agency Iwate Industrial Research Institute, Incorporated National University Iwate UniversityInventors: Mayo Sugibuchi, Kohsuke Takahashi, Shunsuke Goto, Yasube Kashiwaba, Haruyuki Endo, Tatsuo Hasegawa, Fukunori Izumida, Eriko Ohshima
-
Patent number: 7964868Abstract: Disclosed is a semiconductor light-emitting device wherein a pn junction is formed by forming, as a p-type layer (11), a semiconductor thin film which is composed of a ZnO compound doped with nitrogen on an n-type ZnO bulk single crystal substrate (10) whose resistance is lowered by being doped with donor impurities. It is preferable to form the p-type layer (11) on a zinc atom containing surface of the n-type ZnO bulk single crystal substrate (10).Type: GrantFiled: September 5, 2006Date of Patent: June 21, 2011Assignees: Citizen Tohoku Co., Ltd., Incorporated National University Iwate UniversityInventors: Akira Nakagawa, Yasube Kashiwaba, Ikuo Niikura
-
Publication number: 20100239451Abstract: The invention provides a flake graphite cast iron being highly strong and excellent in workability such as cutting performance, which is suitable for use, for example, in internal combustion engine parts and the like, and a production method thereof without using a misch metal. Specifically, the flake graphite cast iron according to the invention includes an A-type graphite with a uniformly and disorderly distributed existence form without directionality; and has a chemical composition containing 2.8 to 4.0 mass % of C, 1.2 to 3.0 mass % of Si, 1.1 to 3.0 mass % of Mn, 0.01 to 0.6 mass % of P, 0.01 to 0.30 mass % of S and the remainder being Fe and inevitable impurities, wherein the ratio (Mn/S) of the Mn content to the S content is within a range of 3 to 300.Type: ApplicationFiled: June 25, 2008Publication date: September 23, 2010Applicants: Incorporated National University Iwate University, Nippon Piston Ring Co., Ltd.Inventors: Hiroshi Horie, Toshinori Kowata, Yoshiki Ishikawa
-
Patent number: 7696251Abstract: A neuronal cell death induced by an oxidative glutamate toxicity is substantially inhibited by administrating to an mammal an effective amount of a phenylenediamine derivative compound of formula (I), wherein R is phenyl or butyl.Type: GrantFiled: February 11, 2008Date of Patent: April 13, 2010Assignee: Incorporated National University Iwate UniversityInventor: Takumi Satoh
-
Patent number: 7544427Abstract: [Object] Various electric wave absorbers for the GHz band have been developed. However, parameters for obtaining the optimal electric wave absorption characteristic are only the shape and the content of a dielectric material or a conductive material, and the degree of freedom of the parameters has been small. Furthermore, in a recent wireless LAN, electric wave absorbers that can be used for absorbing potentially dangerous electric waves in a plurality of bands, for example, in two frequency bands of 2.45 GHz band and 5.2 GHz band, have also been desired.Type: GrantFiled: December 20, 2004Date of Patent: June 9, 2009Assignee: Incorporated National University Iwate UniversityInventor: Hideo Oka
-
Publication number: 20080207765Abstract: A neuronal cell death induced by an oxidative glutamate toxicity is substantially inhibited by administrating to an mammal an effective amount of a phenylenediamine derivative compound of formula (I), wherein R is phenyl or butyl.Type: ApplicationFiled: February 11, 2008Publication date: August 28, 2008Applicant: Incorporated National University Iwate UniversityInventor: Takumi SATOH
-
Patent number: 7241349Abstract: A nondestructive evaluating method for aged deterioration in austenitic stainless steel comprises an information obtaining step for previously obtaining a relationship between an applied stress ? and the first ratio Ms/?H* between a saturation magnetization Ms and a pseudo susceptibility ?H* based on reference minor hysteresis loops obtained by applying stresses ?, respectively, correspondingly to a result of a tensile test for the same kind of material as an evaluation target. In a measuring step, values of the first ratio Ms/?H* are obtained as measured values from measured minor hysteresis loops obtained by measuring the evaluation target. In an evaluating step, the relationship between the applied stress ? and the first ratio Ms/?H* is compared with the measured values, thereby evaluating aged deterioration of the evaluation target. The minor loops are obtained by stepwise changing a magnetic field amplitude Ha within a range of a magnetic field intensity lower than a saturation magnetization.Type: GrantFiled: December 10, 2003Date of Patent: July 10, 2007Assignee: Iwate UniversityInventor: Seiki Takahashi
-
Patent number: 6868735Abstract: Aged deterioration of ferromagnetic construction materials is nondestructively evaluated by applying to an evaluating material a magnetic field whose magnetic field amplitude is rather low, distinguishing various lattice defects, and quantifying them separately. A method includes obtaining a stress-strain relation in advance by a tensile test, evaluating a minor hysteresis loop (reference minor loop) while applying an applied stress (?) thereto, obtaining correlation between physical quantities for evaluating aged deterioration, obtaining a subject minor hysteresis loop (subject minor loop) by a tensile test, obtaining measured values of the physical quantities from the loop, and evaluating aged deterioration of the evaluating material from the measured values.Type: GrantFiled: October 7, 2003Date of Patent: March 22, 2005Assignee: Iwate UniversityInventor: Seiki Takahashi
-
Patent number: 6559635Abstract: This invention is a method for nondestructively determining the deterioration of determining ferromagnetic materials by quantifying the change in brittleness with aging of the materials. This invention supposes acquirement of an embrittlement coefficient b by measuring a magnetic susceptibility &khgr;b of ferromagnetic materials under a magnetic field having a specified intensity H. And the coefficient b of the ferromagnetic materials is calculated by putting the intensity H and the susceptibility &khgr;b into an equation: b=&khgr;bH2. By the coefficient b, a correlation between the coefficient b and a referenced embrittlement factor of materials like said determining materials is obtained previously. The coefficient b of the determining materials in the initial and the deteriorated states is acquired. The factor corresponding to the coefficient b is obtained from the correlation. It is possible to quantify the change by comparing the values of the factor in the initial and deteriorated states.Type: GrantFiled: June 13, 2002Date of Patent: May 6, 2003Assignee: Iwate UniversityInventor: Seiki Takahashi