The Experts below are selected from a list of 75 Experts worldwide ranked by ideXlab platform
Nicholas Priest - One of the best experts on this subject based on the ideXlab platform.
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Comparative Biokinetics of Trivalent Radionuclides with Similar Ionic Dimensions: Promethium-147, Curium-242 and Americium-241
Radiation research, 2007Co-Authors: Nicholas PriestAbstract:Abstract Priest, N. D. Comparative Biokinetics of Trivalent Radionuclides with Similar Ionic Dimensions: Promethium-147, Curium-242 and Americium-241. Radiat. Res. 168, 327–331 (2007). Data on the distribution and redistribution patterns in the laboratory rat of three trivalent elements with a similar ionic radius have been compared. This showed that these distributions for the two ions with the same ionic radius (111 pm), i.e., those of Promethium (a lanthanoid) and curium (an actinoid), were indistinguishable and that americium, with a slightly larger ion size (111.5 pm), behaved similarly. The results are consistent with the suggestion that ion size is the only important factor controlling the deposition and redistribution patterns of trivalent lanthanoids and actinoids in rats. The result is important because it suggests that the same radiological protection dosimetry models should be used for trivalent actinoids and lanthanoids, that human volunteer data generated for lanthanoid isotopes can be used ...
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Comparative Biokinetics of Trivalent Radionuclides with Similar Ionic Dimensions: Promethium-147, Curium-242 and Americium-241
Radiation research, 2007Co-Authors: Nicholas PriestAbstract:Data on the distribution and redistribution patterns in the laboratory rat of three trivalent elements with a similar ionic radius have been compared. This showed that these distributions for the two ions with the same ionic radius (111 pm), i.e., those of Promethium (a lanthanoid) and curium (an actinoid), were indistinguishable and that americium, with a slightly larger ion size (111.5 pm), behaved similarly. The results are consistent with the suggestion that ion size is the only important factor controlling the deposition and redistribution patterns of trivalent lanthanoids and actinoids in rats. The result is important because it suggests that the same radiological protection dosimetry models should be used for trivalent actinoids and lanthanoids, that human volunteer data generated for lanthanoid isotopes can be used to predict the behavior of actinoids with the same ion size, and that appropriate pairs of beta-particle-emitting lanthanoid and alpha-particle-emitting actinoids could be used to study the relative toxicity of alpha and beta particles in experimental animals.
Osamu Narita - One of the best experts on this subject based on the ideXlab platform.
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A radioanalytical method for samarium-151 and Promethium-147 in environmental samples
Science of The Total Environment, 1993Co-Authors: Shuichi Sumiya, Naomi Hayashi, Hiromi Katagiri, Osamu NaritaAbstract:Abstract A radioanalytical method for low level samarium-151 ( 151 Sm) and Promethium-147 ( 147 Pm) in environmental samples has been studied for the environmental assessment around nuclear facilities. In this study, we use the separation method with high performance liquid chromatography (HPLC) to determine 151 Sm and 147 Pm in environmental samples such as sea sediments and marine organisms. Samarium-151 and 147 Pm in environmental samples are coprecipitated with other lanthanoids alter adding neodymium (Nd). These nuclides are purified by anion exchange methods in methanol-mineral acid media. After the purification, 151 Sm and 147 Pm are separated with HPLC in lactic acid-sodium hydroxide media, and determined with liquid scintillation counting, respectively. The Nd is determined by inductively coupled plasma atomic emission spectrometry (ICP-AES) to correct chemical recoveries of these nuclides. The detection limits for 151 Sm and 147 Pm in this method are about 0.01 Bq/sample
Shuichi Sumiya - One of the best experts on this subject based on the ideXlab platform.
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A rapid separation method for determination of Promethium-147 and samarium-151 in environmental samples with high performance liquid chromatography
Journal of Radioanalytical and Nuclear Chemistry, 1995Co-Authors: M. Yoshida, Shuichi Sumiya, H. Watanabe, K. TobitaAbstract:A rapid separation method was developed for determination of low level Promethium-147 and samarium-151. The rapid method, applied to environmental samples, provided speed and efficiency for the respective separation of Pm and Sm from other lanthanides with the simplified technique of high performance liquid chromatography (HPLC) system. The separation time of Pm and Sm in HPLC separation was shortened by stepwise eluent method of α-hydroxyisobutyric acid as compared with a gradient eluent method of lactic acid with HPLC despite increase in sample volume for significant determination of Pm-147 and Sm-151. This method permitted the detection limit around 0.1 Bq/kg-dry-soil for Pm-147 and Sm-151 in 200 g soil sample by counting for 500 min with a liquid scintillation counter.
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A radioanalytical method for samarium-151 and Promethium-147 in environmental samples
Science of The Total Environment, 1993Co-Authors: Shuichi Sumiya, Naomi Hayashi, Hiromi Katagiri, Osamu NaritaAbstract:Abstract A radioanalytical method for low level samarium-151 ( 151 Sm) and Promethium-147 ( 147 Pm) in environmental samples has been studied for the environmental assessment around nuclear facilities. In this study, we use the separation method with high performance liquid chromatography (HPLC) to determine 151 Sm and 147 Pm in environmental samples such as sea sediments and marine organisms. Samarium-151 and 147 Pm in environmental samples are coprecipitated with other lanthanoids alter adding neodymium (Nd). These nuclides are purified by anion exchange methods in methanol-mineral acid media. After the purification, 151 Sm and 147 Pm are separated with HPLC in lactic acid-sodium hydroxide media, and determined with liquid scintillation counting, respectively. The Nd is determined by inductively coupled plasma atomic emission spectrometry (ICP-AES) to correct chemical recoveries of these nuclides. The detection limits for 151 Sm and 147 Pm in this method are about 0.01 Bq/sample
Hiromi Katagiri - One of the best experts on this subject based on the ideXlab platform.
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A radioanalytical method for samarium-151 and Promethium-147 in environmental samples
Science of The Total Environment, 1993Co-Authors: Shuichi Sumiya, Naomi Hayashi, Hiromi Katagiri, Osamu NaritaAbstract:Abstract A radioanalytical method for low level samarium-151 ( 151 Sm) and Promethium-147 ( 147 Pm) in environmental samples has been studied for the environmental assessment around nuclear facilities. In this study, we use the separation method with high performance liquid chromatography (HPLC) to determine 151 Sm and 147 Pm in environmental samples such as sea sediments and marine organisms. Samarium-151 and 147 Pm in environmental samples are coprecipitated with other lanthanoids alter adding neodymium (Nd). These nuclides are purified by anion exchange methods in methanol-mineral acid media. After the purification, 151 Sm and 147 Pm are separated with HPLC in lactic acid-sodium hydroxide media, and determined with liquid scintillation counting, respectively. The Nd is determined by inductively coupled plasma atomic emission spectrometry (ICP-AES) to correct chemical recoveries of these nuclides. The detection limits for 151 Sm and 147 Pm in this method are about 0.01 Bq/sample
Naomi Hayashi - One of the best experts on this subject based on the ideXlab platform.
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A radioanalytical method for samarium-151 and Promethium-147 in environmental samples
Science of The Total Environment, 1993Co-Authors: Shuichi Sumiya, Naomi Hayashi, Hiromi Katagiri, Osamu NaritaAbstract:Abstract A radioanalytical method for low level samarium-151 ( 151 Sm) and Promethium-147 ( 147 Pm) in environmental samples has been studied for the environmental assessment around nuclear facilities. In this study, we use the separation method with high performance liquid chromatography (HPLC) to determine 151 Sm and 147 Pm in environmental samples such as sea sediments and marine organisms. Samarium-151 and 147 Pm in environmental samples are coprecipitated with other lanthanoids alter adding neodymium (Nd). These nuclides are purified by anion exchange methods in methanol-mineral acid media. After the purification, 151 Sm and 147 Pm are separated with HPLC in lactic acid-sodium hydroxide media, and determined with liquid scintillation counting, respectively. The Nd is determined by inductively coupled plasma atomic emission spectrometry (ICP-AES) to correct chemical recoveries of these nuclides. The detection limits for 151 Sm and 147 Pm in this method are about 0.01 Bq/sample
