Research Topics
| Keiko TagamiSummaryAffiliation: National Institute of Radiological Sciences Country: Japan Publications
| Collaborators
|
Detail Information
Publications
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 southwestKeiko 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...- Translocation of radiocesium from stems and leaves of plants and the effect on radiocesium concentrations in newly emerged plant tissuesKeiko 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... 
Determination of bioavailable rhenium fraction in agricultural soilsKeiko 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...- Radium-226 transfer factor from soils to crops and its simple estimation method using uranium and barium concentrationsKeiko 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... - Concentrations of chlorine, bromine and iodine in Japanese riversKeiko 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... - 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... - A comparison of concentration ratios for technetium and nutrient uptake by three plant speciesKeiko 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... - Comparison of transfer and distribution of technetium and rhenium in radish plants from nutrient solutionKeiko 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... - Use of TEVA resin for the determination of U isotopes in water samples by Q-ICP-MSK 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... - Can we remove iodine-131 from tap water in Japan by boiling? - Experimental testing in response to the Fukushima Daiichi Nuclear Power Plant accidentK 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... - Antimony mobility in Japanese agricultural soils and the factors affecting antimony sorption behaviorYasuo 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... - Influence of microorganisms on the behavior of technetium and other elements in paddy soil surface waterNobuyoshi 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... - Physicochemical forms of technetium in surface water covering paddy and upland fieldsNobuyoshi 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... - Effect of phosphate addition on the sorption-desorption reaction of selenium in Japanese agricultural soilsYasuo 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... - 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 themKazuki 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... - Estimation of soil-soil solution distribution coefficient of radiostrontium using soil propertiesNao 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... - Sorption behavior of selenium on humic acid under increasing selenium concentration or increasing solid/liquid ratioNao 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... - Iodide sorption and partitioning in solid, liquid and gas phases in soil samples collected from Japanese paddy fieldsNao 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... - Natural radioactivities in iron and nickel ores imported into Japan and the dose assessment for workers handling themKazuki 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... - Distribution coefficient of selenium in Japanese agricultural soilsYasuo 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... - Responses of the bacterial community to chronic gamma radiation in a rice paddy ecosystemNobuyoshi 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... - Online stable carbon isotope ratio measurement in formic acid, acetic acid, methanol and ethanol in water by high performance liquid chromatography-isotope ratio mass spectrometryKeiko 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... - Concentration ratios of stable elements for selected biota in Japanese estuarine areasH 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... - Contributions of 18 food categories to intakes of 232Th and 238U in JapanK 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... - Rapid uranium preconcentration and separation method from fresh water samples for total U and 235U/238U isotope ratio measurements by ICP-MSK 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... - Determination of radionuclides produced by neutrons in heavily exposed workers of the JCO criticality accident in Tokai-mura for estimating an individual's neutron fluenceY 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... - Determination of uranium isotopes in soil core samples collected on the JCO grounds after the criticality accidentS 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... - Measurement of 240Pu/239Pu isotopic ratios in soils from the Marshall Islands using ICP-MSY 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... - Deposition in chiba prefecture, Japan, of fukushima daiichi nuclear power plant falloutNobuyoshi 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... - Determination of 232Th in seawater by ICP-MS after preconcentration and separation using a chelating resinHyoe 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... - Uptake of radionuclides and stable elements from paddy soil to rice: a reviewS 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... - The production of a new tempeh-like fermented soybean containing a high level of gamma-aminobutyric acid by anaerobic incubation with RhizopusHideyuki 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...