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1996 Fiscal Year Final Research Report Summary

A novel hair analysis for trace elements on hair cross section by synchrotron radiation X-ray fluorescence imaging with X-ray microprobe.

Research Project

Project/Area Number 06670372
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Hygiene
Research InstitutionThe University of Tsukuba

Principal Investigator

SHIMOJO Nobuhiro  Institute of Community Medicine, The University of Tsukuba proffesor, 社会医学系, 教授 (00080622)

Project Period (FY) 1994 – 1996
KeywordsSR-XRF / smelter / hair / heavy metals / biological monitoring / time lag / SOD / methylmercury
Research Abstract

The result of the studies carried out for three years, 1994 to 1996, can be summarized as follows.
1) In this study, we attempted to perform the X-ray microanalysis, ie, one pixel is 5*5mum^2, to reveal trace element distribution of human hair cross sections without washing the samples. The SR-XRF imaging technique used in this study clearly revealed differential distribution of Zn and Pb in the cross hair secton of the smelter.
2) A study of alterations in mammalian Cu, Zn- and Mn-superoxide dismutase caused by methylmercury has been reviewed. Mechanisms for the isozyme-elective decrease in Mn-SOD by the organometallic compound observrd in vivo has been extensively examined by experiments with purified enzyme preparations.
3) The metal leveals in blood and hair reached a maximum at 7 and 8.5 days, respectively, but these elimination curves exhibited a similar pattern (r=0.97) with a time lag (about 3.5 days).

  • Research Products

    (15 results)

All Other

All Publications (15 results)

  • [Publications] Nobuhiro Shimojo: "A novel hair analysis for trace elements on hair cross section by synchrotron radiation X-ay fluorescence imaging with X-ray microprobe : Two-dimentional distribution of lead and zinc on smelter hair." J Occup Health. 39. 64-65 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Nobuhiro Shimojo: "Isozyme selective induction of mouse pulmonary superoxide dismutase by the exposure to mercury vapor." Environmental Toxicology and Pharmacology. 2. 35-37 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Nobuhiro Shimojo: "A new method for detection of mercury-bound protein with a combination of gel electrophoresis and one dimentional synchrotron radiation x-ray fluorescence analysis." J Occup Health. 38. 118-119 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Nobuhiro Shimojo: "SR-XRF imaging of trace elements on hair of the rat exposed to methylmercury." Photon Factory Activity Report. 12. 44 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Shino Homma: "Site-specific distribution of copper,selenium,and zinc in human kidney by synchrotron radiation induced X-ray fluorecence." Nuclear Instruments and Methods in Physics Research B. 103. 229-232 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Nobuhiro Shimojo: "Effects of exercise traning on the distribution of metallic mercury in mice." Human & Experimental Toxicology. 13. 524-528 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 下條 信弘: "重金属による中毒(新内科書)" 鈴木 肇 (株)南山堂, 1817-1821 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] N.Shimojo and Y.Arai.: "Effects of exercise training on the distribution of metallic mercury in mice." Human & Experimental Toxicology. Vol.13. 524-528 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] N.Shimojo, K.Ohuchi, Y.Arai, M.Shinyashiki, S.Homma, Y.Kumagai and I.Nakai.: "SR-XRF imaging of trace elements on hair of the rat exposed to methylmercury." Photon Factory Activity Report. Vol.12. 44 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M.Kiriya, M.Yoshikawa, H.Arizono, S.Homma-Takeda, N.Shimojo and I.Matsuzaki.: "Depression, health level and essential trace elements in community residents." Biomed.Res.Trace Elements. Vol.6. 61 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] N.Shimojo, Y,Kumagai, S.Homma-Takeda, M.Shinyashiki, N.Takasawa and K.Kushida.: "Isozyme selective induction of mouse pulmonary superoxide dismutase by the exposure to mercury vapor." Environmental Toxicology and Pharmacology. Vol.2. 35-37 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y.Kumagai, R.Uranaka, S.Mizukado, S.Homma-Takeda, and N.Shimojo.: "Oxidative modification of Cu, Zn-superoxide dismutase by mercury compounds and mechanism for the metal-promoted enzyme inhibition." JPN.J.Toxicol.Environ.Vol.42. 26 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y.Kumagai, H.Nakajima, M.Shinyashiki, S.Homma-Takeda and N.Shimojo.: "Inhibition of constitutive nitric oxide synthase of rat cerebellum by quinoid compounds." Metal lons in Biology and Medicine. Vol.4. 110-112 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S.Homma-Takeda, M.Ishido, Y.Kumagai, Y.Takenaka, and N.Shimojo.: "In situ determination of mercury distribution and apoptotic cells in mercury-treated rat kidney by a combination of synchrotron radiation X-ray fluorescence (SR-XRF) imaging and TUNEL staining." Metal lons in Biology and Medicine. Vol.4. 360-362 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] N.Shimojo, I.Matsuzaki, S.Homma-Takeda, K.Tabata, M.Shinyashiki, G.Sun, A.Iida and Y.Kumagai.: "A novel hair analysis for trace elements on hair cross section by synchrotron radiation X-ray fluorescence imaging with X-ray microscope : Two-dimentional distribution of lead and zinc on smelter hair." J.Occup.Health. Vol.39. 64-65 (1997)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1999-03-09  

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