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M Thoennessen - One of the best experts on this subject based on the ideXlab platform.
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Contents
2014Co-Authors: C. Fry, M ThoennessenAbstract:One hundred and five Isotopes of the transuranium elements neptunium, plutonium, americium, curium, berkelium and californium have so far been observed; the discovery of these Isotopes is discussed. For each isotope a brief summary of the first refereed publication, including the production and identification method, is presented. ∗Corresponding author
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discovery of Isotopes of the transuranium elements with 93 z 98
Atomic Data and Nuclear Data Tables, 2013Co-Authors: C. Fry, M ThoennessenAbstract:One hundred and five Isotopes of the transuranium elements neptunium, plutonium, americium, curium, berkelium, and californium have been observed so far; the discovery of these Isotopes is described. For each isotope a brief summary of the first refereed publication, including the production and identification method, is presented.
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discovery of palladium antimony tellurium iodine and xenon Isotopes
Atomic Data and Nuclear Data Tables, 2013Co-Authors: J Kathawa, M ThoennessenAbstract:Currently, thirty-eight palladium, thirty-eight antimony, thirty-nine tellurium, thirty-eight iodine, and forty xenon Isotopes have been observed and the discovery of these Isotopes is described here. For each isotope a brief synopsis of the first refereed publication, including the production and identification method, is presented.
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discovery of tantalum rhenium osmium and iridium Isotopes
Atomic Data and Nuclear Data Tables, 2012Co-Authors: R Robinson, M ThoennessenAbstract:Currently, thirty-eight tantalum, thirty-eight rhenium, thirty-nine osmium, and thirty-eight iridium Isotopes have been observed and the discovery of these Isotopes is described here. For each isotope a brief synopsis of the first refereed publication, including the production and identification method, is presented.
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discovery of the astatine radon francium and radium Isotopes
arXiv: Nuclear Experiment, 2012Co-Authors: M ThoennessenAbstract:Currently, thirty-nine astatine, thirty-nine radon, thirty-five francium, and thirty-four radium Isotopes have so far been observed; the discovery of these Isotopes is discussed. For each isotope a brief summary of the first refereed publication, including the production and identification method, is presented.
Xiaokun Han - One of the best experts on this subject based on the ideXlab platform.
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stable isotope fractionation during uptake and translocation of cadmium by tolerant ricinus communis and hyperaccumulator solanum nigrum as influenced by edta
Environmental Pollution, 2018Co-Authors: Rongfei Wei, Qingjun Guo, Jing Kong, Zhaoliang Song, Liyan Tian, Xiaokun Han, Chukwunonso Peter OkoliAbstract:Abstract The isotopic fractionation could contribute to understanding the Cd accumulation mechanisms in plant species. However, there are few of systematical investigations with regards to the Cd isotope fractionation in hyperaccumulator plants. The Cd tolerant Ricinus communis and hyperaccumulator Solanum nigrum were cultivated in nutrient solutions with varying Cd and EDTA concentrations. Cd isotope ratios were determined in the solution, root, stem and leaf. The two investigated plants were systematically enriched in light Isotopes relative to their solutions (Δ114/110Cdplant-solution = −0.64‰ to −0.29‰ for R. communis and −0.84‰ to −0.31‰ for S. nigrum). Cd Isotopes were markedly fractionated among the plant tissues. For both plant species, an enrichment in light Cd Isotopes from solution to root was noted, followed by a slight depletion in light Cd Isotopes from root to shoot. Noticeably, the chelation process has caused lighter Cd isotope enrichment in the root of R. communis and S. nigrum. Further, the good fits between △114/110Cdroot-plant and ln Froot (or between △114/110Cdshoot-plant and ln Fshoot) indicate that Cd isotopic signatures can be used to study Cd transportation during the metabolic process of plants. This study suggests that knowledge of the Cd isotope ratios could also provide new tool for identifying the Cd-avoiding crop cultivars.
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fractionation of stable cadmium Isotopes in the cadmium tolerant ricinus communis and hyperaccumulator solanum nigrum
Scientific Reports, 2016Co-Authors: Rongfei Wei, Cong-qiang Liu, Qingjun Guo, Liyan Tian, Hanjie Wen, Junxing Yang, Marc Peters, Guangxu Zhu, Hanzhi Zhang, Xiaokun HanAbstract:Cadmium (Cd) Isotopes provide new insights into Cd uptake, transport and storage mechanisms in plants. Therefore, the present study adopted the Cd-tolerant Ricinus communis and Cd-hyperaccumulator Solanum nigrum, which were cultured under controlled conditions in a nutrient solution with variable Cd supply, to test the isotopic fractionation of Cd during plant uptake. The Cd isotope compositions of nutrient solutions and organs of the plants were measured by multiple collector inductively coupled plasma mass spectrometry (MC-ICPMS). The mass balance of Cd isotope yields isotope fractionations between plant and Cd source (δ114/110Cdorgans-solution) of −0.70‰ to −0.22‰ in Ricinus communis and −0.51‰ to −0.33‰ in Solanum nigrum. Moreover, Cd isotope fractionation during Cd transport from stem to leaf differs between the Cd-tolerant and -hyperaccumulator species. Based on these results, the processes (diffusion, adsorption, uptake or complexation), which may induce Cd isotope fractionation in plants, have been discussed. Overall, the present study indicates potential applications of Cd Isotopes for investigating plant physiology.
Ulrich Weser - One of the best experts on this subject based on the ideXlab platform.
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mass fractionation processes of transition metal Isotopes
Earth and Planetary Science Letters, 2002Co-Authors: X K Zhu, Y Guo, R J P Williams, R K Onions, Alan Matthews, Nick S Belshaw, Gerard W Canters, E De Waal, Ulrich WeserAbstract:Abstract Recent advances in mass spectrometry make it possible to utilise isotope variations of transition metals to address some important issues in solar system and biological sciences. Realisation of the potential offered by these new isotope systems however requires an adequate understanding of the factors controlling their isotope fractionation. Here we show the results of a broadly based study on copper and iron isotope fractionation during various inorganic and biological processes. These results demonstrate that: (1) naturally occurring inorganic processes can fractionate Fe isotope to a detectable level even at temperature ∼1000°C, which challenges the previous view that Fe isotope variations in natural system are unique biosignatures; (2) multiple-step equilibrium processes at low temperatures may cause large mass fractionation of transition metal Isotopes even when the fractionation per single step is small; (3) oxidation–reduction is an importation controlling factor of isotope fractionation of transition metal elements with multiple valences, which opens a wide range of applications of these new isotope systems, ranging from metal-silicate fractionation in the solar system to uptake pathways of these elements in biological systems; (4) organisms incorporate lighter Isotopes of transition metals preferentially, and transition metal isotope fractionation occurs stepwise along their pathways within biological systems during their uptake.
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mass fractionation processes of transition metal Isotopes
Earth and Planetary Science Letters, 2002Co-Authors: Xiangkun Zhu, Y Guo, R J P Williams, R K Onions, Alan Matthews, Nick S Belshaw, Gerard W Canters, E C De Waal, Ulrich WeserAbstract:Recent advances in mass spectrometry make it possible to utilise isotope variations of transition metals to address some important issues in solar system and biological sciences. Realisation of the potential offered by these new isotope systems however requires an adequate understanding of the factors controlling their isotope fractionation. Here we show the results of a broadly based study on copper and iron isotope fractionation during various inorganic and biological processes. These results demonstrate that: (1) naturally occurring inorganic processes can fractionate Fe isotope to a detectable level even at temperature V1000‡C, which challenges the previous view that Fe isotope variations in natural system are unique biosignatures; (2) multiple-step equilibrium processes at low temperatures may cause large mass fractionation of transition metal Isotopes even when the fractionation per single step is small; (3) oxidation^reduction is an importation controlling factor of isotope fractionation of transition metal elements with multiple valences, which opens a wide range of applications of these new isotope systems, ranging from metal-silicate fractionation in the solar system to uptake pathways of these elements in biological systems; (4) organisms incorporate lighter Isotopes of transition metals preferentially, and transition metal isotope fractionation occurs stepwise along their pathways within biological systems during their uptake. > 2002 Elsevier Science B.V. All rights reserved.
Alan Matthews - One of the best experts on this subject based on the ideXlab platform.
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mass fractionation processes of transition metal Isotopes
Earth and Planetary Science Letters, 2002Co-Authors: X K Zhu, Y Guo, R J P Williams, R K Onions, Alan Matthews, Nick S Belshaw, Gerard W Canters, E De Waal, Ulrich WeserAbstract:Abstract Recent advances in mass spectrometry make it possible to utilise isotope variations of transition metals to address some important issues in solar system and biological sciences. Realisation of the potential offered by these new isotope systems however requires an adequate understanding of the factors controlling their isotope fractionation. Here we show the results of a broadly based study on copper and iron isotope fractionation during various inorganic and biological processes. These results demonstrate that: (1) naturally occurring inorganic processes can fractionate Fe isotope to a detectable level even at temperature ∼1000°C, which challenges the previous view that Fe isotope variations in natural system are unique biosignatures; (2) multiple-step equilibrium processes at low temperatures may cause large mass fractionation of transition metal Isotopes even when the fractionation per single step is small; (3) oxidation–reduction is an importation controlling factor of isotope fractionation of transition metal elements with multiple valences, which opens a wide range of applications of these new isotope systems, ranging from metal-silicate fractionation in the solar system to uptake pathways of these elements in biological systems; (4) organisms incorporate lighter Isotopes of transition metals preferentially, and transition metal isotope fractionation occurs stepwise along their pathways within biological systems during their uptake.
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mass fractionation processes of transition metal Isotopes
Earth and Planetary Science Letters, 2002Co-Authors: Xiangkun Zhu, Y Guo, R J P Williams, R K Onions, Alan Matthews, Nick S Belshaw, Gerard W Canters, E C De Waal, Ulrich WeserAbstract:Recent advances in mass spectrometry make it possible to utilise isotope variations of transition metals to address some important issues in solar system and biological sciences. Realisation of the potential offered by these new isotope systems however requires an adequate understanding of the factors controlling their isotope fractionation. Here we show the results of a broadly based study on copper and iron isotope fractionation during various inorganic and biological processes. These results demonstrate that: (1) naturally occurring inorganic processes can fractionate Fe isotope to a detectable level even at temperature V1000‡C, which challenges the previous view that Fe isotope variations in natural system are unique biosignatures; (2) multiple-step equilibrium processes at low temperatures may cause large mass fractionation of transition metal Isotopes even when the fractionation per single step is small; (3) oxidation^reduction is an importation controlling factor of isotope fractionation of transition metal elements with multiple valences, which opens a wide range of applications of these new isotope systems, ranging from metal-silicate fractionation in the solar system to uptake pathways of these elements in biological systems; (4) organisms incorporate lighter Isotopes of transition metals preferentially, and transition metal isotope fractionation occurs stepwise along their pathways within biological systems during their uptake. > 2002 Elsevier Science B.V. All rights reserved.
Rongfei Wei - One of the best experts on this subject based on the ideXlab platform.
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stable isotope fractionation during uptake and translocation of cadmium by tolerant ricinus communis and hyperaccumulator solanum nigrum as influenced by edta
Environmental Pollution, 2018Co-Authors: Rongfei Wei, Qingjun Guo, Jing Kong, Zhaoliang Song, Liyan Tian, Xiaokun Han, Chukwunonso Peter OkoliAbstract:Abstract The isotopic fractionation could contribute to understanding the Cd accumulation mechanisms in plant species. However, there are few of systematical investigations with regards to the Cd isotope fractionation in hyperaccumulator plants. The Cd tolerant Ricinus communis and hyperaccumulator Solanum nigrum were cultivated in nutrient solutions with varying Cd and EDTA concentrations. Cd isotope ratios were determined in the solution, root, stem and leaf. The two investigated plants were systematically enriched in light Isotopes relative to their solutions (Δ114/110Cdplant-solution = −0.64‰ to −0.29‰ for R. communis and −0.84‰ to −0.31‰ for S. nigrum). Cd Isotopes were markedly fractionated among the plant tissues. For both plant species, an enrichment in light Cd Isotopes from solution to root was noted, followed by a slight depletion in light Cd Isotopes from root to shoot. Noticeably, the chelation process has caused lighter Cd isotope enrichment in the root of R. communis and S. nigrum. Further, the good fits between △114/110Cdroot-plant and ln Froot (or between △114/110Cdshoot-plant and ln Fshoot) indicate that Cd isotopic signatures can be used to study Cd transportation during the metabolic process of plants. This study suggests that knowledge of the Cd isotope ratios could also provide new tool for identifying the Cd-avoiding crop cultivars.
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fractionation of stable cadmium Isotopes in the cadmium tolerant ricinus communis and hyperaccumulator solanum nigrum
Scientific Reports, 2016Co-Authors: Rongfei Wei, Cong-qiang Liu, Qingjun Guo, Liyan Tian, Hanjie Wen, Junxing Yang, Marc Peters, Guangxu Zhu, Hanzhi Zhang, Xiaokun HanAbstract:Cadmium (Cd) Isotopes provide new insights into Cd uptake, transport and storage mechanisms in plants. Therefore, the present study adopted the Cd-tolerant Ricinus communis and Cd-hyperaccumulator Solanum nigrum, which were cultured under controlled conditions in a nutrient solution with variable Cd supply, to test the isotopic fractionation of Cd during plant uptake. The Cd isotope compositions of nutrient solutions and organs of the plants were measured by multiple collector inductively coupled plasma mass spectrometry (MC-ICPMS). The mass balance of Cd isotope yields isotope fractionations between plant and Cd source (δ114/110Cdorgans-solution) of −0.70‰ to −0.22‰ in Ricinus communis and −0.51‰ to −0.33‰ in Solanum nigrum. Moreover, Cd isotope fractionation during Cd transport from stem to leaf differs between the Cd-tolerant and -hyperaccumulator species. Based on these results, the processes (diffusion, adsorption, uptake or complexation), which may induce Cd isotope fractionation in plants, have been discussed. Overall, the present study indicates potential applications of Cd Isotopes for investigating plant physiology.
