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DEVELOPMENT OF 350MHz PULSED EPR SPECTROMETER

Research Project

Project/Area Number 08555002
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section展開研究
Research Field Applied materials science/Crystal engineering
Research InstitutionYAMAGATA UNIVERSITY

Principal Investigator

ONO Mitsuhiro  YAMAGATA UNIVERSITY,ELECTRICAL AND INFORMATION ENGINEERING,PROFESSOR, 工学部, 教授 (60007010)

Co-Investigator(Kenkyū-buntansha) HANIWA Masatoshi  TOSHIBA CO.LTD.ELECTRICAL ENGINEERING,TEAM READER OF RESEARCH, 那須工場, 研究チームリーダー
HIRATA Hiroshi  YAMAGATA UNIVERSITY,ELECTRICAL AND INFORMATION ENGINEERING,ASSOCIATE PROFESSOR, 工学部, 助教授 (60250958)
SHIMOYAMA Yuhei  HOKKAIDO UNIVERSITY OF EDUCATION,PHYSICS,PROFESSOR, 教育学部, 教授 (50123948)
Project Period (FY) 1996 – 1998
Project Status Completed (Fiscal Year 1998)
Budget Amount *help
¥1,400,000 (Direct Cost: ¥1,400,000)
Fiscal Year 1998: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 1997: ¥700,000 (Direct Cost: ¥700,000)
KeywordsELECTRON PARAMAGNETIC RESONANCE (EPR) / ELECTRON SPIN RESONANCE (ESR) / IN VIVO MEARSUREMENT / ELECTRON SPIN ECHO (ESE) / PULSE / RELAXATION TIME CONSTANT / 高周波パルス増幅器 / パルスシーケンス / ループ・ギャップ共振器 / 主体計測
Research Abstract

The study of the behavior of free radicals in a living body has recently become very important in pathology, physiology and pharmacology, We have developed a 350MHz pulsed EPR(Electron paramagnetic resonance) spectrometer especially used for in situ measurement of a rat's whole body, and obtained the following results.
(1) Optimum pulse width and quality factor Q of the resonator are 10-68ns and 10-60, respectively, for the relaxation time constant T_2=10-100ns of bio-radicals, and 68-158ns and 60-280, respectively, for T_2=100-800ns of radicals in solid materials.
(2) Using this spectrometer, the signal of electron spin echo(ESE) was detected for the sample of gamma-irradiated quartz powder. Signal voltage was 3-5mV for 1,400-1 , 600ns of pulse interval.
(3) Relaxation time constant of gamma-irradiated quartz is estimated to be 778 ns, This value is nearly equal to 759 ns obtained at 1.3 GHz in our laboratory.
(4) It is required to reduce the Q value of the resonator to make the measurement of bio radicals possible.

Report

(4 results)
  • 1998 Annual Research Report   Final Research Report Summary
  • 1997 Annual Research Report
  • 1996 Annual Research Report
  • Research Products

    (7 results)

All Other

All Publications (7 results)

  • [Publications] Hiroshi Hirata and Mitsuhiro Ono: "Impedance-matching system for a flexible surface-coil-type resonator" REVIEW OF SCIENTIFIC INSTRUMENTS. Vol.68, No.9. 3528-3532 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Hiroshi Hirata and Mitsuhiro Ono: "A flexible surface-coil-type resonator using triaxial cable" REVIEW OF SCIENTIFIC INSTRUMENTS. Vol. 68, No. 9. 3595-3596 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 平田拓、 小野光弘: "ESR計測用サーフェイスコイル型共振器の試作" 磁気共鳴と医学. Vol.8. 75-78 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Mitsuhiro Ono: "Development of an L-band pulsed ESR directing for in vivo measurements" 18th Annual Meeting of Japan Society of Magnetic Resonance for Life Science. 38 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 平田拓: "Lバンド・サーフェイスコイル型共振器の試作" 第18回磁気共鳴医学会講演要旨集. 39 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 平田拓: "ESR計測用サーフェイスコイル型共振器の試作" 磁気共鳴と医学. 8・1997. 75-78 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] S.Yamada: "Molecular orientation and growth direction of polydiacetylene single-crystal monolayer at the air-water interface" Japanese Journal of Applied Physics. 35. 4480-4485 (1996)

    • Related Report
      1996 Annual Research Report

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Published: 1997-04-01   Modified: 2016-04-21  

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