Patents by Inventor Yuzuru Shimazaki

Yuzuru Shimazaki has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 12203852
    Abstract: A digital PCR measuring apparatus capable of measuring a melting curve with high accuracy is provided. The digital PCR measuring apparatus includes a temperature adjuster that controls a temperature of a sample container including a plurality of minute regions, a fluorescence measurement part that measures fluorescence intensity of a plurality of minute regions, and a controller that controls the temperature adjuster and the fluorescence measurement part. The controller controls the temperature adjuster to raise a temperature of the sample container, and, after removing air bubbles generated in the sample container, measures fluorescence intensity of a plurality of minute regions while controlling the temperature adjuster to lower the temperature of the sample container, and measures a melting curve of a plurality of the minute regions.
    Type: Grant
    Filed: February 26, 2020
    Date of Patent: January 21, 2025
    Assignee: HITACHI, LTD.
    Inventors: Tatsuo Nakagawa, Junko Tanaka, Yuzuru Shimazaki, Kunio Harada
  • Patent number: 12018319
    Abstract: The present invention addresses the problem of providing a novel digital PCR analysis method. One embodiment of the novel digital PCR analysis method is a DNA detection method including the steps of: partitioning a DNA solution containing a fluorescent-labeled probe or a DNA intercalator and a target DNA to be detected into a plurality of compartments; carrying out a nucleic acid amplification reaction in the compartments; measuring a fluorescence intensity in association with a temperature change; calculating a melting temperature of a DNA double strand based on a change in the fluorescence intensity in association with the temperature change; and calculating a ratio of a fluorescence intensity at a second temperature that is lower than a first temperature in association with the temperature change to that at the first temperature.
    Type: Grant
    Filed: May 20, 2019
    Date of Patent: June 25, 2024
    Assignee: HITACHI, LTD.
    Inventors: Junko Tanaka, Tatsuo Nakagawa, Yuzuru Shimazaki, Kunio Harada
  • Patent number: 11906406
    Abstract: Provided is an automatic analysis technique that prevents liquid contained in a reaction container from locally contacting with liquid added afterward and has less occurrence frequency of equipment malfunction and high performance.
    Type: Grant
    Filed: April 5, 2018
    Date of Patent: February 20, 2024
    Assignees: Hitachi High-Tech Corporation, Roche Diagnostics Operations, Inc.
    Inventors: Daisuke Ebihara, Shinya Matsuoka, Taku Sakazume, Yuzuru Shimazaki
  • Publication number: 20220364164
    Abstract: The purpose of the present invention is to provide a novel digital PCR analysis method. In the digital PCR analysis method disclosed herein, a method for detecting DNA is used, which includes the steps of: dividing a DNA solution containing a fluorescent-labeled probe or a DNA intercalator and a plurality of DNAs to be detected into a plurality of compartments; carrying out PCR in the compartments; measuring a fluorescence intensity in association with a change in temperature; calculating a melting temperature from a melting curve for a DNA double strand measured on the basis of a change in fluorescence intensity, which is associated with the change in temperature; and calculating a temperature difference between two points with a slope of a predetermined value on a melting curve indicating a change in the fluorescence intensity.
    Type: Application
    Filed: May 27, 2020
    Publication date: November 17, 2022
    Inventors: Junko TANAKA, Tatsuo NAKAGAWA, Yuzuru SHIMAZAKI, Akiko SHIRATORI
  • Publication number: 20220195356
    Abstract: The present disclosure provides a technique capable of manufacturing a measurement cell having a high specimen utilization ratio in the case of using a measurement cell that introduces a specimen into a surface hole. In the measurement cell manufacturing method according to the present disclosure, a measurement cell includes a channel wall protruding from the lower surface substrate toward the through-hole, and a specimen solution is introduced into a lower surface side space to introduce the specimen into the through-hole (see FIG. 1).
    Type: Application
    Filed: April 2, 2020
    Publication date: June 23, 2022
    Inventors: Yuzuru SHIMAZAKI, Tatsuo NAKAGAWA, Junko TANAKA, Akiko SHIRATORI, Chihiro UEMATSU
  • Publication number: 20220155227
    Abstract: A digital PCR measuring apparatus capable of measuring a melting curve with high accuracy is provided. The digital PCR measuring apparatus includes a temperature adjuster that controls a temperature of a sample container including a plurality of minute regions, a fluorescence measurement part that measures fluorescence intensity of a plurality of minute regions, and a controller that controls the temperature adjuster and the fluorescence measurement part. The controller controls the temperature adjuster to raise a temperature of the sample container, and, after removing air bubbles generated in the sample container, measures fluorescence intensity of a plurality of minute regions while controlling the temperature adjuster to lower the temperature of the sample container, and measures a melting curve of a plurality of the minute regions.
    Type: Application
    Filed: February 26, 2020
    Publication date: May 19, 2022
    Applicant: HITACHI, LTD.
    Inventors: Tatsuo NAKAGAWA, Junko TANAKA, Yuzuru SHIMAZAKI, Kunio HARADA
  • Publication number: 20210130877
    Abstract: The present invention addresses the problem of providing a novel digital PCR analysis method. One embodiment of the novel digital PCR analysis method is a DNA detection method including the steps of: partitioning a DNA solution containing a fluorescent-labeled probe or a DNA intercalator and a target DNA to be detected into a plurality of compartments; carrying out a nucleic acid amplification reaction in the compartments; measuring a fluorescence intensity in association with a temperature change; calculating a melting temperature of a DNA double strand based on a change in the fluorescence intensity in association with the temperature change; and calculating a ratio of a fluorescence intensity at a second temperature that is lower than a first temperature in association with the temperature change to that at the first temperature.
    Type: Application
    Filed: May 20, 2019
    Publication date: May 6, 2021
    Applicant: HITACHI, LTD.
    Inventors: Junko TANAKA, Tatsuo NAKAGAWA, Yuzuru SHIMAZAKI, Kunio HARADA
  • Patent number: 10898878
    Abstract: An object of the present invention is to provide an adsorbent material having high dispersibility and reversibility. The adsorbent material has a polymer material having a plurality of functional groups ionizable in water and exhibiting no lower limit critical solution temperature, an adsorption site capable of interacting with a target substance, and a carrier.
    Type: Grant
    Filed: July 10, 2017
    Date of Patent: January 26, 2021
    Assignee: Showa Denko Materials Co., Ltd.
    Inventors: Masashi Maruyama, Nanae Yamashita, Yuzuru Shimazaki, Hiroshi Yoshida, Keisuke Shibuya
  • Publication number: 20200182754
    Abstract: Provided is an automatic analysis technique that prevents liquid contained in a reaction container from locally contacting with liquid added afterward and has less occurrence frequency of equipment malfunction and high performance.
    Type: Application
    Filed: April 5, 2018
    Publication date: June 11, 2020
    Inventors: Daisuke EBIHARA, Shinya MATSUOKA, Taku SAKAZUME, Yuzuru SHIMAZAKI
  • Publication number: 20190193050
    Abstract: An object of the present invention is to provide an adsorbent material having high dispersibility and reversibility. The adsorbent material has a polymer material having a plurality of functional groups ionizable in water and exhibiting no lower limit critical solution temperature, an adsorption site capable of interacting with a target substance, and a carrier.
    Type: Application
    Filed: July 10, 2017
    Publication date: June 27, 2019
    Applicant: HITACHI CHEMICAL COMPANY, LTD.
    Inventors: Masashi MARUYAMA, Nanae YAMASHITA, Yuzuru SHIMAZAKI, Hiroshi YOSHIDA, Keisuke SHIBUYA
  • Patent number: 9005342
    Abstract: The present invention is characterized in that a filter made of resin comprises a through-hole film portion (14); and a structure reinforce portion (13), wherein a through-hole (15) is provided in a through-hole film portion (14), the thickness of the through-hole film portion (14) is from 0.5 to 2.0 ?m, the bore of the through-hole (15) is from 0.05 to 0.5 ?m, the thickness of the structure reinforce portion (13) is bigger than the thickness of the through-hole film portion (14), the structure reinforce portion (13) encloses the through-hole film portion (14), a damage-reduction structure is provided on the upper surface of the structure reinforce portion (13), and wherein, the damage-reduction structure may be an uneven structures.
    Type: Grant
    Filed: December 27, 2012
    Date of Patent: April 14, 2015
    Assignee: Hitachi, Ltd.
    Inventors: Yuzuru Shimazaki, Ryuta Washiya, Masahiko Ogino, Akihiro Miyauchi
  • Patent number: 8663822
    Abstract: In one embodiment, a magnetic disk medium includes a nonmagnetic substrate, a magnetic recording layer above the nonmagnetic substrate, a protective layer above the magnetic recording layer, and a lubricant layer above the protective layer, the lubricant layer including a mixture of a compound having one or more cyclophosphazene groups and a lubricant formulated R1-OCH2CF2CF2O(CF2CF2CF2O)mCF2CF2CH2O—R2, wherein R1 and R2 are alkyl chains having at least two hydroxyl groups each, and m is an integer indicating a number of repeating units. According to another embodiment, a magnetic disk medium lubricant includes a mixture of a compound having one or more cyclophosphazene groups and a lubricant formulated as above, such that a magnetic head is provided stable flight above the lubricant layer in conditions having relative humidity of greater than about 40%.
    Type: Grant
    Filed: October 4, 2011
    Date of Patent: March 4, 2014
    Assignee: HGST Netherlands B.V.
    Inventors: Yoshihiko Ooeda, Yuzuru Shimazaki, Mina Amo, Yuichi Aoki, Robert Waltman
  • Publication number: 20130260095
    Abstract: A glass substrate having a fine structure on the surface thereof, wherein said glass substrate is made of vanadium-containing glass and said vanadium-containing glass has a resistivity no higher than 109 ?·cm, with the content of vanadium (in the form of V2O5) being no less than 10 wt % and no more than 60 wt %. The glass substrate prevents dust attraction and retains its antifouling properties over a long period of time.
    Type: Application
    Filed: February 19, 2013
    Publication date: October 3, 2013
    Applicant: HITACHI, LTD.
    Inventors: Yuzuru SHIMAZAKI, Takashi NAITO, Takuya AOYAGI, Yuichi SAWAI, Tadashi FUJIEDA, Akihiro MIYAUCHI, Masahiko OGINO
  • Publication number: 20130083422
    Abstract: In one embodiment, a magnetic disk medium includes a nonmagnetic substrate, a magnetic recording layer above the nonmagnetic substrate, a protective layer above the magnetic recording layer, and a lubricant layer above the protective layer, the lubricant layer including a mixture of a compound having one or more cyclophosphazene groups and a lubricant formulated R1-OCH2CF2CF2O(CF2CF2CF2O)mCF2CF2CH2O—R2, wherein R1 and R2 are alkyl chains having at least two hydroxyl groups each, and m is an integer indicating a number of repeating units. According to another embodiment, a magnetic disk medium lubricant includes a mixture of a compound having one or more cyclophosphazene groups and a lubricant formulated as above, such that a magnetic head is provided stable flight above the lubricant layer in conditions having relative humidity of greater than about 40%.
    Type: Application
    Filed: October 4, 2011
    Publication date: April 4, 2013
    Applicant: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Yoshihiko Ooeda, Yuzuru Shimazaki, Mina Amo, Yuichi Aoki, Robert Waltman
  • Patent number: 7659224
    Abstract: Although nanoparticles capable of providing an extremely large active surface area have highly marked advantages, when a PEFC electrode utilizing nanoparticles is used for a prolonged period of time, the catalyst nanoparticles on carrier of the PEFC electrode because of the nano-size thereof migrate and aggregate together to result in a rapid loss of activity. Thus, there is a demand for inhibition of the above aggregation so as to prevent any drop of catalytic activity. According to the present invention the aggregation of nanoparticles can be inhibited by catalyst nanoparticles containing Pt wherein a porous matter containing an inorganic oxide is disposed on the surface of the catalyst nanoparticles. When use is made of nanoparticles whose surface has undergone specific modification, excellent activity can be realized. Therefore, there are provided surface-modified nanoparticles and catalyst and further a PEFC electrode utilizing these nanoparticles.
    Type: Grant
    Filed: September 13, 2006
    Date of Patent: February 9, 2010
    Assignee: Hitachi, Ltd.
    Inventors: Yuzuru Shimazaki, Yoshio Kobayashi, Mikio Konno
  • Publication number: 20090297924
    Abstract: Although nanoparticles capable of providing an extremely large active surface area have highly marked advantages, when a PEFC electrode utilizing nanoparticles is used for a prolonged period of time, the catalyst nanoparticles on carrier of the PEFC electrode because of the nano-size thereof migrate and aggregate together to result in a rapid loss of activity. Thus, there is a demand for inhibition of the above aggregation so as to prevent any drop of catalytic activity. According to the present invention the aggregation of nanoparticles can be inhibited by catalyst nanoparticles containing Pt wherein a porous matter containing an inorganic oxide is disposed on the surface of the catalyst nanoparticles. When use is made of nanoparticles whose surface has undergone specific modification, excellent activity can be realized. Therefore, there are provided surface-modified nanoparticles and catalyst and further a PEFC electrode utilizing these nanoparticles.
    Type: Application
    Filed: September 13, 2006
    Publication date: December 3, 2009
    Inventors: Yuzuru Shimazaki, Yoshio Kobayashi, Mikio Konno
  • Publication number: 20070026294
    Abstract: Although nanoparticles capable of providing an extremely large active surface area have highly marked advantages, when a PEFC electrode utilizing nanoparticles is used for a prolonged period of time, the catalyst nanoparticles on carrier of the PEFC electrode because of the nano-size thereof migrate and aggregate together to result in a rapid loss of activity. Thus, there is a demand for inhibition of the above aggregation so as to prevent any drop of catalytic activity. According to the present invention the aggregation of nanoparticles can be inhibited by catalyst nanoparticles containing Pt wherein a porous matter containing an inorganic oxide is disposed on the surface of the catalyst nanoparticles. When use is made of nanoparticles whose surface has undergone specific modification, excellent activity can be realized. Therefore, there are provided surface-modified nanoparticles and catalyst and further a PEFC electrode utilizing these nanoparticles.
    Type: Application
    Filed: September 13, 2006
    Publication date: February 1, 2007
    Inventors: Yuzuru Shimazaki, Yoshio Kobayashi, Mikio Konno
  • Publication number: 20040182602
    Abstract: The present invention aims at miniaturizing a balance-unbalance converter using the conventional connection lines and reducing the cost thereof. The present invention provides a high frequency electronic circuit component constituted by three transmission lines formed on at least the same surface, wherein the first and second transmission lines face each other on the same surface and are connected to each other electromagnetically, and the first and third transmission lines face each other on the same surface and are connected to each other electromagnetically.
    Type: Application
    Filed: March 9, 2004
    Publication date: September 23, 2004
    Inventors: Toshiya Satoh, Masahiko Ogino, Sigehisa Motowaki, Yuzuru Shimazaki, Yoko Furukawa
  • Patent number: 5365325
    Abstract: Each of a charging process on and after a second time is carried out by a charging means having a controlling electrode. The relationship between a controlling potential (Vg) applied to the controlling electrode of each charming means, the target surface potential (Vo) of a non-image portion of a surface of a photosensitive body and the direct current component potential (Vdc) of a developing bias potential in each developing process is satisfied by the formula, which is .vertline.Vo.vertline.>.vertline.Vdc.vertline..gtoreq..vertline.Vg.vertlin e.. Thereby the corona current ia supplied to flow sufficiently, it can rise the surface potential of a toner image portion of the surface of the photosensitive body after the re-charming without the excessive rise of the surface potential of the non-image portion of the photosensitive body.
    Type: Grant
    Filed: August 5, 1993
    Date of Patent: November 15, 1994
    Assignees: Hitachi, Ltd., Hitachi Koki Co., Ltd.
    Inventors: Takao Kumasaka, Yuzuru Shimazaki, Toru Miyasaka, Yukio Otome
  • Patent number: 4862828
    Abstract: Non-contact type developing device and method for electrophotographic recording system. The pitch of magnetic poles on a developing sleeve carrying a developer is selected to fall within a predetermined range or is varied such that the pitch increases as the circumferential distance from the point where the gap between the developer carrier member and a photosensitive member is minimum. The bias voltage applied to the developing sleeve is controlled in accordance with a change in the size of the gap between the surface of the photosensitive member and the layer of the developer on the developer carrying member. Alternatively, the bias voltage is applied throughout a period in which the charged region on the photosensitive member is opposed by the developing sleeve.
    Type: Grant
    Filed: February 23, 1988
    Date of Patent: September 5, 1989
    Assignees: Hitachi, Ltd., Hitachi Koki Co., Ltd.
    Inventors: Takao Kumasaka, Teruaki Mitsuya, Isamu Komatsu, Shigetaka Fujiwara, Yuzuru Shimazaki