Keiko Tagami

Summary

Affiliation: National Institute of Radiological Sciences
Country: Japan

Publications

  1. doi request reprint Specific activity and activity ratios of radionuclides in soil collected about 20 km from the Fukushima Daiichi Nuclear Power Plant: Radionuclide release to the south and southwest
    Keiko Tagami
    National Institute of Radiological Sciences, Anagawa 4 9 1, Inage Ku, Chiba 263 8555, Japan
    Sci Total Environ 409:4885-8. 2011
  2. doi request reprint Marine and freshwater concentration ratios (CR(wo-water)): review of Japanese data
    K Tagami
    Office of Biospheric Assessment for Waste Disposal, National Institute of Radiological Sciences, Anagawa 4 9 1, Inage Ku, Chiba 263 8555, Japan Electronic address
    J Environ Radioact 126:420-6. 2013
  3. doi request reprint Estimation of Te-132 distribution in Fukushima Prefecture at the early stage of the Fukushima Daiichi Nuclear Power Plant reactor failures
    Keiko Tagami
    Office of Biospheric Assessment for Waste Disposal, National Institute of Radiological Sciences, Anagawa 4 9 1, Inage Ku, Chiba shi, 263 8555, Japan
    Environ Sci Technol 47:5007-12. 2013
  4. doi request reprint Translocation of radiocesium from stems and leaves of plants and the effect on radiocesium concentrations in newly emerged plant tissues
    Keiko Tagami
    Office of Biospheric Assessment for Waste Disposal, National Institute of Radiological Sciences, Anagawa 4 9 1, Inage Ku, Chiba 263 8555, Japan
    J Environ Radioact 111:65-9. 2012
  5. ncbi request reprint A comparison of concentration ratios for technetium and nutrient uptake by three plant species
    Keiko Tagami
    Office of Biospheric Assessment for Waste Disposal, National Institute of Radiological Sciences, Anagawa 4 9 1, Chiba 263 8555, Japan
    Chemosphere 60:714-7. 2005
  6. ncbi request reprint Determination of bioavailable rhenium fraction in agricultural soils
    Keiko Tagami
    Office of Biospheric Assessment for Waste Disposal, National Institute of Radiological Sciences, Anagawa 4 9 1, Inage Ku, Chiba 263 8555, Japan
    J Environ Radioact 99:973-80. 2008
  7. doi request reprint Can elemental composition data of crop leaves be used to estimate radionuclide transfer to tree leaves?
    Keiko Tagami
    Office of Biospheric Assessment for Waste Disposal, National Institute of Radiological Sciences, Chiba, Japan
    Radiat Environ Biophys 49:583-90. 2010
  8. ncbi request reprint Concentrations of chlorine, bromine and iodine in Japanese rivers
    Keiko Tagami
    Office of Biospheric Assessment for Waste Disposal, National Institute of Radiological Sciences, Anagawa 4 9 1, Inage Ku, Chiba shi, Chiba 263 8555, Japan
    Chemosphere 65:2358-65. 2006
  9. doi request reprint Can we remove iodine-131 from tap water in Japan by boiling? - Experimental testing in response to the Fukushima Daiichi Nuclear Power Plant accident
    K Tagami
    Office of Biospheric Assessment for Waste Disposal, National Institute of Radiological Sciences, Anagawa 4 9 1, Inage Ku, Chiba 263 8555, Japan
    Chemosphere 84:1282-4. 2011
  10. doi request reprint Radium-226 transfer factor from soils to crops and its simple estimation method using uranium and barium concentrations
    Keiko Tagami
    National Institute of Radiological Sciences, Anagawa, Inage Ku, Chiba, Japan
    Chemosphere 77:105-14. 2009

Collaborators

Detail Information

Publications42

  1. doi request reprint Specific activity and activity ratios of radionuclides in soil collected about 20 km from the Fukushima Daiichi Nuclear Power Plant: Radionuclide release to the south and southwest
    Keiko Tagami
    National Institute of Radiological Sciences, Anagawa 4 9 1, Inage Ku, Chiba 263 8555, Japan
    Sci Total Environ 409:4885-8. 2011
    ..The average activity ratios of (131)I/(137)Cs, (134)Cs/(137)Cs, (136)Cs/(137)Cs and (129m)Te/(137)Cs were 55, 0.90, 0.22 and 4.0 (corrected to March 11, 2011) in the 0-2cm soil samples of April 20 and 28, 2011...
  2. doi request reprint Marine and freshwater concentration ratios (CR(wo-water)): review of Japanese data
    K Tagami
    Office of Biospheric Assessment for Waste Disposal, National Institute of Radiological Sciences, Anagawa 4 9 1, Inage Ku, Chiba 263 8555, Japan Electronic address
    J Environ Radioact 126:420-6. 2013
    ....
  3. doi request reprint Estimation of Te-132 distribution in Fukushima Prefecture at the early stage of the Fukushima Daiichi Nuclear Power Plant reactor failures
    Keiko Tagami
    Office of Biospheric Assessment for Waste Disposal, National Institute of Radiological Sciences, Anagawa 4 9 1, Inage Ku, Chiba shi, 263 8555, Japan
    Environ Sci Technol 47:5007-12. 2013
    ....
  4. doi request reprint Translocation of radiocesium from stems and leaves of plants and the effect on radiocesium concentrations in newly emerged plant tissues
    Keiko Tagami
    Office of Biospheric Assessment for Waste Disposal, National Institute of Radiological Sciences, Anagawa 4 9 1, Inage Ku, Chiba 263 8555, Japan
    J Environ Radioact 111:65-9. 2012
    ..The type of the plant and presence of old leaves at the time of the heavy deposition period affected the radiocesium concentrations in newly emerged tissues...
  5. ncbi request reprint A comparison of concentration ratios for technetium and nutrient uptake by three plant species
    Keiko Tagami
    Office of Biospheric Assessment for Waste Disposal, National Institute of Radiological Sciences, Anagawa 4 9 1, Chiba 263 8555, Japan
    Chemosphere 60:714-7. 2005
    ..After TcO4- passes through a root surface, it moves through the xylem together with cations. Due to these uptake mechanisms, Tc is highly accumulated in plants...
  6. ncbi request reprint Determination of bioavailable rhenium fraction in agricultural soils
    Keiko Tagami
    Office of Biospheric Assessment for Waste Disposal, National Institute of Radiological Sciences, Anagawa 4 9 1, Inage Ku, Chiba 263 8555, Japan
    J Environ Radioact 99:973-80. 2008
    ..Rhenium mobility and plant availability were higher in paddy fields than in other agricultural fields, and similar phenomena would be expected for (99)Tc...
  7. doi request reprint Can elemental composition data of crop leaves be used to estimate radionuclide transfer to tree leaves?
    Keiko Tagami
    Office of Biospheric Assessment for Waste Disposal, National Institute of Radiological Sciences, Chiba, Japan
    Radiat Environ Biophys 49:583-90. 2010
    ..However, some trees accumulate a few elements (e.g., Al, Co, Mn and Si) in their leaves to higher concentrations than observed for leafy vegetables...
  8. ncbi request reprint Concentrations of chlorine, bromine and iodine in Japanese rivers
    Keiko Tagami
    Office of Biospheric Assessment for Waste Disposal, National Institute of Radiological Sciences, Anagawa 4 9 1, Inage Ku, Chiba shi, Chiba 263 8555, Japan
    Chemosphere 65:2358-65. 2006
    ..The I/Cl ratios had different trends in rivers flowing into the Japan Sea and Pacific Ocean, possibly due to the different geological features in the river catchments...
  9. doi request reprint Can we remove iodine-131 from tap water in Japan by boiling? - Experimental testing in response to the Fukushima Daiichi Nuclear Power Plant accident
    K Tagami
    Office of Biospheric Assessment for Waste Disposal, National Institute of Radiological Sciences, Anagawa 4 9 1, Inage Ku, Chiba 263 8555, Japan
    Chemosphere 84:1282-4. 2011
    ..In this situation, boiling was shown to be not effective in removing iodine-131 from tap water; indeed even higher concentrations may result from the liquid-volume reduction accompanying this process...
  10. doi request reprint Radium-226 transfer factor from soils to crops and its simple estimation method using uranium and barium concentrations
    Keiko Tagami
    National Institute of Radiological Sciences, Anagawa, Inage Ku, Chiba, Japan
    Chemosphere 77:105-14. 2009
    ..2 on average for crops. The method could estimate F(v)-Ra for the soil-to-plant systems where (226)Ra and Ba concentrations in soil are within the normal range, e.g. 8-100 Bq kg(-1)-dry for (226)Ra and 84-960 mg kg(-1)-dry for Ba...
  11. ncbi request reprint Comparison of transfer and distribution of technetium and rhenium in radish plants from nutrient solution
    Keiko Tagami
    National Institute of Radiological Sciences, Office of Biospheric Assessment for Waste Disposal, Anagawa 4 9 1, Inage Ku, Chiba shi, Chiba 263 8555, Japan
    Appl Radiat Isot 61:1203-10. 2004
    ..The behavior of other elements was different from that of Tc and Re. These findings suggest the possible use of Re as the chemical analogue of Tc in soil solution to plant uptake experiments...
  12. ncbi request reprint Use of TEVA resin for the determination of U isotopes in water samples by Q-ICP-MS
    K Tagami
    Environmental and Toxicological Sciences Research Group, National Institute of Radiological Sciences, Anagawa 4 9 1, Inage Ku, Chiba shi, Chiba 263 8555, Japan
    Appl Radiat Isot 61:255-9. 2004
    ..U extracted on the resin could be removed with 20 ml of 1 M HCl (U fraction) when Fe content was lower than 2 mg. U recovery in U fraction showed a negative correlation with Fe content in the samples...
  13. ncbi request reprint Antimony mobility in Japanese agricultural soils and the factors affecting antimony sorption behavior
    Yasuo Nakamaru
    Office of Biospheric Assessment for Waste Disposal, National Institute of Radiological Sciences, Anagawa 4 9 1, Inage, Chiba City, 263 8555, Japan
    Environ Pollut 141:321-6. 2006
    ..However, other aspects could not be explained by this specific adsorption mechanism, because only 20-40% of soil-sorbed Sb could be extracted by phosphate solution...
  14. doi request reprint Distribution coefficients (K(d)) of stable iodine in estuarine and coastal regions, Japan, and their relationship to salinity and organic carbon in sediments
    Hyoe Takata
    Office of Biospheric Assessment for Waste Disposal, National Institute of Radiological Sciences, 4 9 1 Anagawa, Inage Ku, Chiba 263 8555, Japan
    Environ Monit Assess 185:3645-58. 2013
    ..Thus, OC in sediments as well as salinity may be responsible for the variation of (K(d))S of I in the estuarine and coastal regions...
  15. ncbi request reprint Physicochemical forms of technetium in surface water covering paddy and upland fields
    Nobuyoshi Ishii
    Office of Biospheric Assessment for Waste Disposal, National Institute of Radiological Sciences, Anagawa 4 9 1, Inage Ku, Chiba shi 263 8555, Japan
    Chemosphere 57:953-9. 2004
    ..These results showed that the physicochemical form of Tc changes from TcO(4)(-) to insoluble forms in surface water covering paddy fields. The insoluble forms would restrict the mobility of Tc in paddy fields...
  16. ncbi request reprint Influence of microorganisms on the behavior of technetium and other elements in paddy soil surface water
    Nobuyoshi Ishii
    Office of Biospheric Assessment for Waste Disposal, National Institute of Radiological Sciences, 4 9 1 Anagawa, Inage Ku, Chiba shi 263 8555, Japan
    J Environ Radioact 77:369-80. 2004
    ..Although Re is a chemical analog of Tc, no similarity was observed. These results suggest that Tc behaves similarly to Nb in the insolubilization in surface water covering paddy fields...
  17. ncbi request reprint Effect of phosphate addition on the sorption-desorption reaction of selenium in Japanese agricultural soils
    Yasuo Nakamaru
    Office of Biospheric Assessment for Waste Disposal, National Institute of Radiological Sciences, Anagawa 4 9 1, Inage, Chiba 263 8555, Japan
    Chemosphere 63:109-15. 2006
    ..The phosphate addition with 1 mM PO4 is the same level as in P fertilizer applied to paddy fields in Japan. Therefore, it was suggested that Se desorption should occur in Japanese soils due to the phosphate input...
  18. doi request reprint Measurement of natural radioactive nuclide concentrations in various metal ores used as industrial raw materials in Japan and estimation of dose received by workers handling them
    Kazuki Iwaoka
    Research Center for Radiation Protection, National Institute of Radiological Sciences, Inage, Chiba 263 8555, Japan
    J Environ Radioact 100:993-7. 2009
    ..5 x 10(-4)Sv y(-1), which was lower than intervention exemption levels (1.0 x 10(-3)Sv y(-1)) given in International Commission of Radiological Protection (ICRP) Publication 82...
  19. doi request reprint Iodide sorption and partitioning in solid, liquid and gas phases in soil samples collected from Japanese paddy fields
    Nao K Ishikawa
    Office of Biospheric Assessment for Waste Disposal, National Institute of Radiological Sciences, 4 9 1 Anagawa, Inage Ku, Chiba 263 8555, Japan
    Radiat Prot Dosimetry 146:155-8. 2011
    ..In addition, the authors found that K(d) values at 23 °C had good correlation with pH though there was no correlation between K(d) values at 4 °C and pH because of the difference in biological activity...
  20. doi request reprint Estimation of soil-soil solution distribution coefficient of radiostrontium using soil properties
    Nao K Ishikawa
    Office of Biospheric Assessment for Waste Disposal, National Institute of Radiological Sciences, Anagawa 4 9 1, Inage, Chiba 263 8555, Japan
    Appl Radiat Isot 67:319-23. 2009
    ..72. This pointed us toward a relatively easy way to estimate Sr-K(d) values...
  21. ncbi request reprint Sorption behavior of selenium on humic acid under increasing selenium concentration or increasing solid/liquid ratio
    Nao Kamei-Ishikawa
    Office of Biospheric Assessment for Waste Disposal, National Institute of Radiological Sciences, Anagawa 4 9 1, Inage, Chiba 263 8555, Japan
    J Environ Radioact 99:993-1002. 2008
    ..In addition, since dissolved HA increased with decreased ionic strength in the HA suspension, ionic strength could promote aggregation of HA. The conformational change of HA could affect the sorption behavior of Se on HA...
  22. ncbi request reprint (135)Cs/(137)Cs isotopic ratio as a new tracer of radiocesium released from the Fukushima nuclear accident
    Jian Zheng
    Research Center for Radiation Protection, National Institute of Radiological Sciences, 491 Anagawa, Inage, Chiba 263 8555, Japan
    Environ Sci Technol 48:5433-8. 2014
    ..06 years), the (135)Cs/(137)Cs isotopic ratio can be considered as a new tracer for source identification and long-term estimation of the mobility of released radiocesium in the environment. ..
  23. ncbi request reprint Rapid and sensitive determination of tellurium in soil and plant samples by sector-field inductively coupled plasma mass spectrometry
    Guosheng Yang
    Office of Biospheric Assessment for Waste Disposal, Research Center for Radiation Protection, National Institute of Radiological Sciences, Anagawa 4 9 1, Inage, Chiba 263 8555, Japan
    Talanta 116:181-7. 2013
    ....
  24. doi request reprint Deposition in Chiba prefecture, Japan, of Fukushima Daiichi Nuclear Power Plant fallout
    Nobuyoshi Ishii
    Research Center for Radiation Protection, National Institute of Radiological Sciences, Anagawa 4 9 1, Inage, Chiba 263 8555, Japan
    Health Phys 104:189-94. 2013
    ..For the vertical profile of those radionuclides in soil at NIRS, about 94% of the total deposition was distributed in the top 10 mm depth on 26 April 2011...
  25. ncbi request reprint Distribution coefficient of selenium in Japanese agricultural soils
    Yasuo Nakamaru
    Office of Biospheric Assessment for Waste Disposal, National Institute of Radiological Sciences, Anagawa 4 9 1, Inage Ku, Chiba shi 263 8555, Japan
    Chemosphere 58:1347-54. 2005
    ..The high values of Kd seemed to be caused mainly by the adsorption of Se onto active-Al in Japanese soils...
  26. doi request reprint Natural radioactivities in iron and nickel ores imported into Japan and the dose assessment for workers handling them
    Kazuki Iwaoka
    Research Center for Radiation Protection, National Institute of Radiological Sciences, Inage, Chiba, Japan
    J Radiol Prot 30:613-20. 2010
    ..8 × 10(-6) Sv, which was lower than intervention exemption levels (annual dose 1.0 × 10(-3) Sv) given in International Commission on Radiological Protection (ICRP) Publication 82...
  27. doi request reprint Determination of 232Th in seawater by ICP-MS after preconcentration and separation using a chelating resin
    Hyoe Takata
    Office of Biospheric Assessment for Waste Disposal, National Institute of Radiological Sciences, Anagawa 4 9 1, Inage Ku, Chiba 263 8555, Japan
    Talanta 85:1772-7. 2011
    ..0038 ng/L for (232)Th, and was successfully applied to the determination of (232)Th in seawater samples collected from coastal areas, Japan...
  28. doi request reprint Online stable carbon isotope ratio measurement in formic acid, acetic acid, methanol and ethanol in water by high performance liquid chromatography-isotope ratio mass spectrometry
    Keiko Tagami
    National Institute of Radiological Sciences, 4 9 1, Anagawa, Inage Ku, Chiba 263 8555, Japan k
    Anal Chim Acta 614:165-72. 2008
    ..Under the determined analysis condition for HPLC-IRMS, carbon concentrations could be measured quantitatively as well as carbon isotope ratio when carbon concentration was higher than 0.4 mM L for each chemical...
  29. doi request reprint Responses of the bacterial community to chronic gamma radiation in a rice paddy ecosystem
    Nobuyoshi Ishii
    Environmental Radiation Effects Research Group, National Institute of Radiological Sciences, Chiba, Japan
    Int J Radiat Biol 87:663-72. 2011
    ..Concentrations of Na(+), Ca(2+), and F(-) inversely decreased. Conclusions: The data presented suggest that chronic gamma radiation affects the bacterial community structure and material cycles in the rice paddy ecosystem...
  30. ncbi request reprint Determination of uranium isotopes in soil core samples collected on the JCO grounds after the criticality accident
    S Yoshida
    Environmental and Toxicological Sciences Research Group, National Institute of Radiological Sciences, Chiba shi, Chiba, Japan
    Environ Sci Technol 35:4174-9. 2001
    ..Since the range of the U concentrations found was comparable to the range of uncontaminated Japanese surface soils, the amount of U added to the soil was judged negligible from a radiation protection viewpoint...
  31. ncbi request reprint Measurement of 240Pu/239Pu isotopic ratios in soils from the Marshall Islands using ICP-MS
    Y Muramatsu
    Environmental and Toxicological Researches Group, National Institute of Radiological Sciences, Chiba, Japan
    Sci Total Environ 278:151-9. 2001
    ..137Cs and 60Co were also determined on the same set of soil samples for comparative purposes...
  32. ncbi request reprint Determination of radionuclides produced by neutrons in heavily exposed workers of the JCO criticality accident in Tokai-mura for estimating an individual's neutron fluence
    Y Muramatsu
    National Institute of Radiological Sciences, Chiba, Japan
    J Radiat Res 42:S117-28. 2001
    ..2 x 10(4),4.3 x 10(4) and 1.2 x 10(4) Bq24Na/g23Na. Based on these values, individual's neutron fluences were estimated to be 5.7 x 10(11), 3.0 x 10(-1) and 0.85 x 10(11) cm(-2), respectively...
  33. ncbi request reprint Contributions of 18 food categories to intakes of 232Th and 238U in Japan
    K Shiraishi
    Division of Human Radiation Environment, National Institute of Radiological Sciences, Chiba, Japan
    Health Phys 78:28-36. 2000
    ..7 mBq and 14 mBq per person from the intakes of the 18 categories, respectively. Annual effective doses were estimated to be 232Th, 2.2 x 10(-7) Sv, and 238U, 2.2 x 10(-7) Sv...
  34. ncbi request reprint Rapid uranium preconcentration and separation method from fresh water samples for total U and 235U/238U isotope ratio measurements by ICP-MS
    K Tagami
    Office of Biospheric Assessment for Waste Disposal, National Institute of Radiological Sciences, Anagawa 4 9 1, Inage Ku, Chiba 263 8555, Japan k
    Anal Chim Acta 592:101-5. 2007
    ..Moreover, U in water samples was separated from many major and minor elements with the TRU cartridges. Almost all U was concentrated in 10 mL of 0.014 M TMAH in 2 h using 200 mL of water sample...
  35. doi request reprint Concentration ratios of stable elements for selected biota in Japanese estuarine areas
    H Takata
    Office of Biospheric Assessment for Waste Disposal, National Institute of Radiological Sciences, Inage Ku, Chiba, Japan
    Radiat Environ Biophys 49:591-601. 2010
    ..For environmental radiological assessment, conversion factors from tissue to whole-body C(R) values are useful parameters...
  36. doi request reprint Release of plutonium isotopes into the environment from the Fukushima Daiichi Nuclear Power Plant accident: what is known and what needs to be known
    Jian Zheng
    Research Center of Radiation Protection, National Institute of Radiological Sciences, Anagawa 4 9 1, Inage, Chiba 263 8555, Japan
    Environ Sci Technol 47:9584-95. 2013
    ..Finally, we identified knowledge gaps remained on the release of Pu into the environment and recommended issues for future studies. ..
  37. ncbi request reprint Soil-to-crop transfer factors of tellurium
    Guosheng Yang
    Office of Biospheric Assessment for Waste Disposal, National Institute of Radiological Sciences, Japan
    Chemosphere 111:554-9. 2014
    ..577, p<0.001), but no correlation was found for brown rice. We considered it likely that different water management practices in upland fields and paddy fields affected the Te transfer from soil to crops. ..
  38. ncbi request reprint Distribution coefficients (Kd) of strontium and significance of oxides and organic matter in controlling its partitioning in coastal regions of Japan
    Hyoe Takata
    National Institute of Radiological Sciences, Chiba City, Chiba, Japan Electronic address
    Sci Total Environ 490:979-86. 2014
    ..Furthermore, the information presented here could be useful to estimate Kd values for anthropogenic (90)Sr in sediment in the coastal marine environment. ..
  39. doi request reprint Ecological half-lives of radiocesium in 16 species in marine biota after the TEPCO's Fukushima Daiichi nuclear power plant accident
    Kayoko Iwata
    Office of Biospheric Assessment for Waste Disposal, National Institute of Radiological Sciences, Anagawa 4 9 1, Inage Ku, Chiba 263 8555, Japan
    Environ Sci Technol 47:7696-703. 2013
    ..4 to 16.1. The reasons for different ratios of Teco and Tb values may be attributed to environmental and ecological factors, such as different trophic levels. ..
  40. doi request reprint Ultra-trace plutonium determination in small volume seawater by sector field inductively coupled plasma mass spectrometry with application to Fukushima seawater samples
    Wenting Bu
    State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China Research Center of Radiation Protection, National Institute of Radiological Sciences, Anagawa 4 9 1, Inage, Chiba 263 8555, Japan
    J Chromatogr A 1337:171-8. 2014
    ..Our results suggested that there was no significant variation of the Pu distribution in seawater in the investigated areas compared to the distribution before the accident. ..
  41. ncbi request reprint Uptake of radionuclides and stable elements from paddy soil to rice: a review
    S Uchida
    National Institute of Radiological Sciences, Chiba, Japan
    J Environ Radioact 100:739-45. 2009
    ..The compiled data showed that TF values were higher in brown rice than in white rice because distribution patterns for elements were different in the bran and white parts of rice grains...
  42. ncbi request reprint The production of a new tempeh-like fermented soybean containing a high level of gamma-aminobutyric acid by anaerobic incubation with Rhizopus
    Hideyuki Aoki
    Research Laboratory, Ikeda Tohka Industries Co, Ltd, 95 7 Minooki cho, Fukuyama, Hiroshima 721 0956, Japan
    Biosci Biotechnol Biochem 67:1018-23. 2003
    ..Moreover, the free protein amino acids increased greatly in the fermented soybeans during the anaerobic cultivation...