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Pesquisa : D01.268.271.100.175 [Categoria DeCS]
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  1 / 161 MEDLINE  
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[PMID]:27588898
[Au] Autor:Maloubier M; Shuh DK; Minasian SG; Pacold JI; Solari PL; Michel H; Oberhaensli FR; Bottein Y; Monfort M; Moulin C; Den Auwer C
[Ad] Endereço:Institut de Chimie de Nice, Université Côte d'Azur and Centre National de la Recherche Scientifique , 06108 Nice, France.
[Ti] Título:How Do Radionuclides Accumulate in Marine Organisms? A Case Study of Europium with Aplysina cavernicola.
[So] Source:Environ Sci Technol;50(19):10730-10738, 2016 Oct 04.
[Is] ISSN:1520-5851
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:In the ocean, complex interactions between natural and anthropogenic radionuclides, seawater, and diverse marine biota provide a unique window through which to examine ecosystem and trophic transfer mechanisms in cases of accidental dissemination. The nature of interaction between radionuclides, the marine environment, and marine species is therefore essential for better understanding transfer mechanisms from the hydrosphere to the biosphere. Although data pertaining to the rate of global transfer are often available, little is known regarding the mechanism of environmental transport and uptake of heavy radionuclides by marine species. Among marine species, sponges are immobile active filter feeders and have been identified as hyperaccumulators of several heavy metals. We have selected the Mediterranean sponge Aplysina cavernicola as a model species for this study. Actinide elements are not the only source of radioactive release in cases of civilian nuclear events; however, their physicochemical transfer mechanisms to marine species remain largely unknown. We have targeted europium(III) as a representative of the trivalent actinides such as americium or curium. To unravel biological uptake mechanisms of europium in A. cavernicola, we have combined radiometric (γ) measurements with spectroscopic (time-resolved laser-induced fluorescence spectroscopy, TRLIFS, and X-ray absorption near-edge structure, XANES) and imaging (transmission electron microscopy, TEM, and scanning transmission X-ray microscopy, STXM) techniques. We have observed that the colloids of NaEu(CO ) ·nH O formed in seawater are taken up by A. cavernicola with no evidence that lethal dose has been reached in our working conditions. Spectroscopic results suggest that there is no change of speciation during uptake. Finally, TEM and STXM images recorded at different locations across a sponge cross section, together with differential cell separation, indicate the presence of europium particles (around 200 nm) mainly located in the skeleton and toward the outer surface of the sponge.
[Mh] Termos MeSH primário: Organismos Aquáticos
Európio
[Mh] Termos MeSH secundário: Amerício
Cúrio
Radioisótopos
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Radioisotopes); 444W947O8O (Europium); M5LL84MZ2W (Curium); VW92PHU2UY (Americium)
[Em] Mês de entrada:1706
[Cu] Atualização por classe:170608
[Lr] Data última revisão:
170608
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160903
[St] Status:MEDLINE


  2 / 161 MEDLINE  
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[PMID]:26822907
[Au] Autor:Dai X; Christl M; Kramer-Tremblay S; Synal HA
[Ad] Endereço:Canadian Nuclear Laboratories, Chalk River, Ontario K0J 1J0, Canada.
[Ti] Título:Determination of Atto- to Femtogram Levels of Americium and Curium Isotopes in Large-Volume Urine Samples by Compact Accelerator Mass Spectrometry.
[So] Source:Anal Chem;88(5):2832-7, 2016 Mar 01.
[Is] ISSN:1520-6882
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Ultralow level analysis of actinides in urine samples may be required for dose assessment in the event of internal exposures to these radionuclides at nuclear facilities and nuclear power plants. A new bioassay method for analysis of sub-femtogram levels of Am and Cm in large-volume urine samples was developed. Americium and curium were co-precipitated with hydrous titanium oxide from the urine matrix and purified by column chromatography separation. After target preparation using mixed titanium/iron oxides, the final sample was measured by compact accelerator mass spectrometry. Urine samples spiked with known quantities of Am and Cm isotopes in the range of attogram to femtogram levels were measured for method evaluation. The results are in good agreement with the expected values, demonstrating the feasibility of compact accelerator mass spectrometry (AMS) for the determination of minor actinides at the levels of attogram/liter in urine samples to meet stringent sensitivity requirements for internal dosimetry assessment.
[Mh] Termos MeSH primário: Amerício/urina
Cúrio/urina
Espectrometria de Massas/métodos
[Mh] Termos MeSH secundário: Isótopos
Limite de Detecção
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Isotopes); M5LL84MZ2W (Curium); VW92PHU2UY (Americium)
[Em] Mês de entrada:1612
[Cu] Atualização por classe:161230
[Lr] Data última revisão:
161230
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160130
[St] Status:MEDLINE
[do] DOI:10.1021/acs.analchem.5b04546


  3 / 161 MEDLINE  
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[PMID]:26535001
[Au] Autor:Gerstmann UC; Taubner K; Hartmann M
[Ad] Endereço:Department of Radiation Protection and Health, BfS-Federal Office for Radiation Protection, Köpenicker Allee 120-130, 10318 Berlin, Germany ugerstmann@bfs.de.
[Ti] Título:AN INTERLABORATORY COMPARISON ON THE DETERMINATION OF 241Am, 244Cm AND 252Cf IN URINE.
[So] Source:Radiat Prot Dosimetry;170(1-4):58-62, 2016 Sep.
[Is] ISSN:1742-3406
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:An intercomparison exercise on the determination of (241)Am, (244)Cm and (252)Cf in urine was performed. Since it was designed with regard to emergency preparedness, the detection limit for each nuclide was set to 0.1 Bq per 24-h urine sample. Most of the participating laboratories were established bioassay laboratories. However, some laboratories that routinely determine (241)Am only in environmental samples were also invited in order to explore their potential for emergency bioassay analysis. Another aspect of the intercomparison was to investigate the performance of all laboratories concerning the chemical yields of the (243)Am tracer in comparison with (244)Cm and (252)Cf. In summary, both types of laboratories showed good results. There was a negative bias for the results of (244)Cm and (252)Cf, which can be explained by slightly different radiochemical behaviours of americium, curium and californium and which is in agreement with results reported in the literature.
[Mh] Termos MeSH primário: Amerício/urina
Bioensaio/métodos
Califórnio/urina
Cúrio/urina
Laboratórios/normas
Radioquímica/instrumentação
[Mh] Termos MeSH secundário: Cromatografia
Seres Humanos
Limite de Detecção
Monitoramento de Radiação
Radioquímica/métodos
Padrões de Referência
Valores de Referência
Reprodutibilidade dos Testes
Urinálise
[Pt] Tipo de publicação:COMPARATIVE STUDY; JOURNAL ARTICLE
[Nm] Nome de substância:
975X05H15A (Californium); M5LL84MZ2W (Curium); VW92PHU2UY (Americium)
[Em] Mês de entrada:1704
[Cu] Atualização por classe:170404
[Lr] Data última revisão:
170404
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:151105
[St] Status:MEDLINE
[do] DOI:10.1093/rpd/ncv447


  4 / 161 MEDLINE  
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[PMID]:26424133
[Au] Autor:Hernández C; Sierra I
[Ad] Endereço:Bioelimination Laboratory, Radiation Dosimetry Service, CIEMAT, Avda. Complutense 40, 28040 Madrid, Spain carolina.hernandez@ciemat.es.
[Ti] Título:RETROSPECTIVE METHOD VALIDATION AND UNCERTAINTY ESTIMATION FOR ACTINIDES DETERMINATION IN EXCRETA BY ALPHA SPECTROMETRY.
[So] Source:Radiat Prot Dosimetry;170(1-4):39-44, 2016 Sep.
[Is] ISSN:1742-3406
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Two essential technical requirements of ISO 17025 guide for accreditation of testing and calibration laboratories are the validation of methods and the estimation of all sources of uncertainty that may affect the analytical result. Bioelimination Laboratory from Radiation Dosimetry Service of CIEMAT (Spain) uses alpha spectrometry to quantify alpha emitters (Pu, Am, Th, U and Cm isotopes) in urine and faecal samples from workers exposed to internal radiation. Therefore and as a step previous to achieving the ISO 17025 accreditation, the laboratory has performed retrospective studies based on the obtained results in the past few years to validate the analytical method. Uncertainty estimation was done identifying and quantifying all the contributions, and finally the overall combined standard uncertainty was calculated.
[Mh] Termos MeSH primário: Elementos da Série Actinoide/análise
Elementos da Série Actinoide/urina
Radiometria/métodos
[Mh] Termos MeSH secundário: Acreditação
Partículas alfa
Amerício/urina
Calibragem
Cúrio/urina
Fezes
Seres Humanos
Plutônio/urina
Controle de Qualidade
Radioisótopos/análise
Radiometria/instrumentação
Padrões de Referência
Reprodutibilidade dos Testes
Estudos Retrospectivos
Tório/urina
Incerteza
Urânio/urina
Urina
Água
[Pt] Tipo de publicação:JOURNAL ARTICLE; VALIDATION STUDIES
[Nm] Nome de substância:
0 (Actinoid Series Elements); 0 (Radioisotopes); 059QF0KO0R (Water); 4OC371KSTK (Uranium); 53023GN24M (Plutonium); 60YU5MIG9W (Thorium); M5LL84MZ2W (Curium); VW92PHU2UY (Americium)
[Em] Mês de entrada:1704
[Cu] Atualização por classe:170404
[Lr] Data última revisão:
170404
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:151002
[St] Status:MEDLINE
[do] DOI:10.1093/rpd/ncv418


  5 / 161 MEDLINE  
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[PMID]:25483018
[Au] Autor:Bauer N; Smith VC; MacGillivray RT; Panak PJ
[Ad] Endereço:Karlsruhe Institute of Technology (KIT), Campus North, Institute for Nuclear Waste Disposal (INE), P.O. Box 3640, 76021 Karlsruhe, Germany. Nicole.bauer@kit.edu.
[Ti] Título:Complexation of Cm(III) with the recombinant N-lobe of human serum transferrin studied by time-resolved laser fluorescence spectroscopy (TRLFS).
[So] Source:Dalton Trans;44(4):1850-7, 2015 Jan 28.
[Is] ISSN:1477-9234
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:The complexation of Cm(III) with the recombinant N-lobe of human serum transferrin (hTf/2N) is investigated in the pH range from 4.0 to 11.0 using TRLFS. At pH ≥ 7.4 a Cm(III) hTf/2N species is formed with Cm(III) bound at the Fe(III) binding site. The results are compared with Cm(III) transferrin interaction at the C-lobe and indicate the similarity of the coordination environment of the C- and N-terminal binding sites with four amino acid residues of the protein, two H2O molecules and three additional ligands (e.g. synergistic anions such as carbonate) in the first coordination sphere. Measurements at c(carbonate)tot = 0.23 mM (ambient carbonate concentration) and c(carbonate)tot = 25 mM (physiological carbonate concentration) show that an increase of the total carbonate concentration suppresses the formation of the Cm(III) hTf/2N species significantly. Additionally, the three Cm(III) carbonate species Cm(CO3)(+), Cm(CO3)2(-) and Cm(CO3)3(3-) are formed successively with increasing pH. In general, carbonate complexation is a competing reaction for both Cm(III) complexation with transferrin and hTf/2N but the effect is significantly higher for the half molecule. At c(carbonate)tot = 0.23 mM the complexation of Cm(III) with transferrin and hTf/2N starts at pH ≥ 7.4. At physiological carbonate concentration the Cm(III) transferrin species II forms at pH ≥ 7.0 whereas the Cm(III) hTf/2N species is not formed until pH > 10.0. Hence, our results reveal significant differences in the complexation behavior of the C-terminal site of transferrin and the recombinant N-lobe (hTf/2N) towards trivalent actinides.
[Mh] Termos MeSH primário: Cúrio/química
Transferrina/química
[Mh] Termos MeSH secundário: Carbonatos/química
Complexos de Coordenação/química
Seres Humanos
Concentração de Íons de Hidrogênio
Proteínas Recombinantes/química
Espectrometria de Fluorescência
Temperatura Ambiente
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Carbonates); 0 (Coordination Complexes); 0 (Recombinant Proteins); 0 (Transferrin); M5LL84MZ2W (Curium)
[Em] Mês de entrada:1508
[Cu] Atualização por classe:141223
[Lr] Data última revisão:
141223
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:141209
[St] Status:MEDLINE
[do] DOI:10.1039/c4dt03403a


  6 / 161 MEDLINE  
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[PMID]:25350948
[Au] Autor:Kurosaki H; Kaplan DI; Clark SB
[Ad] Endereço:Department of Chemistry, Washington State University , Post Office Box 644630, Pullman, Washington 99164, United States.
[Ti] Título:Impact of environmental curium on plutonium migration and isotopic signatures.
[So] Source:Environ Sci Technol;48(23):13985-91, 2014 Dec 02.
[Is] ISSN:1520-5851
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Plutonium (Pu), americium (Am), and curium (Cm) activities were measured in sediments from a former radioactive waste disposal basin located on the Savannah River Site, South Carolina, and in subsurface aquifer sediments collected downgradient from the basin. In situ Kd values (Pu concentration ratio of sediment/groundwater) derived from this field data and previously reported groundwater concentration data compared well to laboratory Kd values reported in the literature. Pu isotopic signatures confirmed multiple sources of Pu contamination. The ratio of (240)Pu/(239)Pu was appreciably lower for sediment samples compared to the associated groundwater. This isotopic ratio difference may be explained by the following: (1) (240)Pu produced by decay of (244)Cm may exist predominantly in high oxidation states (Pu(V)O2(+) and Pu(VI)O2(2+)) compared to Pu derived from the disposed waste effluents, and (2) oxidized forms of Pu sorb less to sediments than reduced forms of Pu. Isotope-specific Kd values calculated from measured Pu activities in the sediments and groundwater indicated that (240)Pu, which is derived primarily from the decay of (244)Cm, had a value of 10 ± 2 mL g(-1), whereas (239)Pu originating from the waste effluents discharged at the site had a value of 101 ± 8 mL g(-1). One possible explanation for the isotope-specific sorption behavior is that (240)Pu likely existed in the weaker sorbing oxidation states, +5 or +6, than (239)Pu, which likely existed in the +3 or +4 oxidation states. Consequently, remediation strategies for radioactively contaminated systems must consider not only the discharged contaminants but also their decay products. In this case, mitigation of Cm as well as Pu will be required to completely address Pu migration from the source term.
[Mh] Termos MeSH primário: Amerício/química
Cúrio/química
Plutônio/química
Resíduos Radioativos/análise
Radioisótopos
Poluentes Radioativos da Água/química
[Mh] Termos MeSH secundário: Monitoramento Ambiental
Oxirredução
Rios/química
Poluentes Radioativos do Solo/química
South Carolina
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, U.S. GOV'T, NON-P.H.S.
[Nm] Nome de substância:
0 (Radioactive Waste); 0 (Radioisotopes); 0 (Soil Pollutants, Radioactive); 0 (Water Pollutants, Radioactive); 53023GN24M (Plutonium); M5LL84MZ2W (Curium); VW92PHU2UY (Americium)
[Em] Mês de entrada:1506
[Cu] Atualização por classe:141202
[Lr] Data última revisão:
141202
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:141029
[St] Status:MEDLINE
[do] DOI:10.1021/es500968n


  7 / 161 MEDLINE  
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[PMID]:25271932
[Au] Autor:Edwards GW; Priest ND
[Ad] Endereço:*Atomic Energy of Canada Ltd., Chalk River Laboratories, Chalk River, Ontario, K0J 1J0, Canada.
[Ti] Título:Further evaluations of the toxicity of irradiated advanced heavy water reactor fuels.
[So] Source:Health Phys;107(5):417-34, 2014 Nov.
[Is] ISSN:1538-5159
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:The neutron economy and online refueling capability of heavy water moderated reactors enable them to use many different fuel types, such as low enriched uranium, plutonium mixed with uranium, or plutonium and/or U mixed with thorium, in addition to their traditional natural uranium fuel. However, the toxicity and radiological protection methods for fuels other than natural uranium are not well established. A previous paper by the current authors compared the composition and toxicity of irradiated natural uranium to that of three potential advanced heavy water fuels not containing plutonium, and this work uses the same method to compare irradiated natural uranium to three other fuels that do contain plutonium in their initial composition. All three of the new fuels are assumed to incorporate plutonium isotopes characteristic of those that would be recovered from light water reactor fuel via reprocessing. The first fuel investigated is a homogeneous thorium-plutonium fuel designed for a once-through fuel cycle without reprocessing. The second fuel is a heterogeneous thorium-plutonium-U bundle, with graded enrichments of U in different parts of a single fuel assembly. This fuel is assumed to be part of a recycling scenario in which U from previously irradiated fuel is recovered. The third fuel is one in which plutonium and Am are mixed with natural uranium. Each of these fuels, because of the presence of plutonium in the initial composition, is determined to be considerably more radiotoxic than is standard natural uranium. Canadian nuclear safety regulations require that techniques be available for the measurement of 1 mSv of committed effective dose after exposure to irradiated fuel. For natural uranium fuel, the isotope Pu is a significant contributor to the committed effective dose after exposure, and thermal ionization mass spectrometry is sensitive enough that the amount of Pu excreted in urine is sufficient to estimate internal doses, from all isotopes, as low as 1 mSv. In addition, if this method is extended so that Pu is also measured, then the combined amount of Pu and Pu is sufficiently high in the thorium-plutonium fuel that a committed effective dose of 1 mSv would be measurable. However, the fraction of Pu and Pu in the other two fuels is sufficiently low that a 1 mSv dose would remain below the detection limit using this technique. Thus new methods, such as fecal measurements of Pu (or other alpha emitters), will be required to measure exposure to these new fuels.
[Mh] Termos MeSH primário: Óxido de Deutério/química
Reatores Nucleares
Plutônio/análise
Urânio/análise
[Mh] Termos MeSH secundário: Algoritmos
Amerício/análise
Cúrio/análise
Seres Humanos
Monitoramento de Radiação
Radioisótopos/análise
Radiometria/métodos
Valores de Referência
Solubilidade
Tório/análise
Urânio/urina
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Radioisotopes); 4OC371KSTK (Uranium); 53023GN24M (Plutonium); 60YU5MIG9W (Thorium); J65BV539M3 (Deuterium Oxide); M5LL84MZ2W (Curium); VW92PHU2UY (Americium)
[Em] Mês de entrada:1411
[Cu] Atualização por classe:141002
[Lr] Data última revisão:
141002
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:141002
[St] Status:MEDLINE
[do] DOI:10.1097/HP.0000000000000140


  8 / 161 MEDLINE  
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[PMID]:25043376
[Au] Autor:Sturzbecher-Hoehne M; Kullgren B; Jarvis EE; An DD; Abergel RJ
[Ad] Endereço:Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720 (USA).
[Ti] Título:Highly luminescent and stable hydroxypyridinonate complexes: a step towards new curium decontamination strategies.
[So] Source:Chemistry;20(32):9962-8, 2014 Aug 04.
[Is] ISSN:1521-3765
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:The photophysical properties, solution thermodynamics, and in vivo complex stabilities of Cm(III) complexes formed with multidentate hydroxypyridinonate ligands, 3,4,3-LI(1,2-HOPO) and 5-LIO(Me-3,2-HOPO), are reported. Both chelators were investigated for their ability to act as antenna chromophores for Cm(III), leading to highly sensitized luminescence emission of the metal upon complexation, with long lifetimes (383 and 196 µs for 3,4,3-LI(1,2-HOPO) and 5-LIO(Me-3,2-HOPO), respectively) and remarkable quantum yields (45 % and 16 %, respectively) in aqueous solution. The bright emission peaks were used to probe the electronic structure of the 5f complexes and gain insight into ligand field effects; they were also exploited to determine the high (and proton-independent) stabilities of the corresponding Cm(III) complexes (log ß110 = 21.8(4) for 3,4,3-LI(1,2-HOPO) and log ß120 = 24.5(5) for 5-LIO(Me-3,2-HOPO)). The in vivo complex stability for both ligands was assessed by using (248) Cm as a tracer in a rodent model, which provided a direct comparison with the in vitro thermodynamic results and demonstrated the great potential of 3,4,3-LI(1,2-HOPO) as a therapeutic Cm(III) decontamination agent.
[Mh] Termos MeSH primário: Quelantes/química
Cúrio/química
Substâncias Luminescentes/química
Piridonas/química
Poluentes Radioativos/química
[Mh] Termos MeSH secundário: Complexos de Coordenação/química
Cúrio/isolamento & purificação
Descontaminação
Luminescência
Poluentes Radioativos/isolamento & purificação
Termodinâmica
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, N.I.H., EXTRAMURAL; RESEARCH SUPPORT, U.S. GOV'T, NON-P.H.S.
[Nm] Nome de substância:
0 (1,2-hydroxypyridinone); 0 (Chelating Agents); 0 (Coordination Complexes); 0 (Luminescent Agents); 0 (Pyridones); 0 (Radioactive Pollutants); M5LL84MZ2W (Curium)
[Em] Mês de entrada:1505
[Cu] Atualização por classe:140801
[Lr] Data última revisão:
140801
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:140722
[St] Status:MEDLINE
[do] DOI:10.1002/chem.201402103


  9 / 161 MEDLINE  
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[PMID]:24626477
[Au] Autor:Bauer N; Fröhlich DR; Panak PJ
[Ad] Endereço:Karlsruhe Institute of Technology (KIT), Campus North, Institute for Nuclear Waste Disposal (INE), P.O. Box 3640, 76021 Karlsruhe, Germany. Nicole.bauer@kit.edu.
[Ti] Título:Interaction of Cm(III) and Am(III) with human serum transferrin studied by time-resolved laser fluorescence and EXAFS spectroscopy.
[So] Source:Dalton Trans;43(18):6689-700, 2014 May 14.
[Is] ISSN:1477-9234
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:The complexation of Cm(III) with human serum transferrin was investigated in a pH range from 3.5 to 11.0 using time-resolved laser fluorescence spectroscopy (TRLFS). At pH ≥ 7.4 Cm(III) is incorporated at the Fe(III) binding site of transferrin whereas at lower pH a partially bound Cm(III) transferrin species is formed. At physiological temperature (310 K) at pH 7.4, about 70% of the partially bound and 30% of the incorporated Cm(III) transferrin species are present in solution. The Cm(III) results obtained by TRLFS are in very good agreement with Am(III) EXAFS results, confirming the incorporation of Am(III) at the Fe(III) binding site at pH 8.5.
[Mh] Termos MeSH primário: Fluorimunoensaio
Transferrina/análise
Transferrina/metabolismo
Espectroscopia por Absorção de Raios X
[Mh] Termos MeSH secundário: Cúrio/análise
Cúrio/metabolismo
Fluorimunoensaio/métodos
Seres Humanos
Ligação Proteica/fisiologia
Espectroscopia por Absorção de Raios X/métodos
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Transferrin); M5LL84MZ2W (Curium)
[Em] Mês de entrada:1504
[Cu] Atualização por classe:140408
[Lr] Data última revisão:
140408
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:140315
[St] Status:MEDLINE
[do] DOI:10.1039/c3dt53371a


  10 / 161 MEDLINE  
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[PMID]:24531259
[Au] Autor:Yamamoto M; Sakaguchi A; Ochiai S; Takada T; Hamataka K; Murakami T; Nagao S
[Ad] Endereço:Low Level Radioactivity Laboratory, Kanazawa University, Nomi, Ishikawa 923-1224, Japan. Electronic address: pluto@llrl.ku-unet.ocn.ne.jp.
[Ti] Título:Isotopic Pu, Am and Cm signatures in environmental samples contaminated by the Fukushima Dai-ichi Nuclear Power Plant accident.
[So] Source:J Environ Radioact;132:31-46, 2014 Jun.
[Is] ISSN:1879-1700
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Dust samples from the sides of roads (black substances) have been collected together with litter and soil samples at more than 100 sites contaminated heavily in the 20-km exclusion zones around Fukushima Dai-ichi Nuclear Power Plant (FDNPP) (Minamisoma City, and Namie, Futaba and Okuma Towns), in Iitate Village located from 25 to 45 km northwest of the plant and in southern areas from the plant. Isotopes of Pu, Am and Cm have been measured in the samples to evaluate their total releases into the environment from the FDNPP and to get the isotopic compositions among these nuclides. For black substances and litter samples, in addition to Pu isotopes, (241)Am, (242)Cm and (243,244)Cm were determined for most of samples examined, while for soil samples, only Pu isotopes were determined. The results provided a coherent data set on (239,240)Pu inventories and isotopic composition among these transuranic nuclides. When these activity ratios were compared with those for fuel core inventories in the FDNPP accident estimated by a group at JAEA, except (239,240)Pu/(137)Cs activity ratios, fairly good agreements were found, indicating that transuranic nuclides, probably in the forms of fine particles, were released into the environment without their large fractionations. The obtained data may lead to more accurate information about the on-site situation (e.g., burn-up, conditions of fuel during the release phase, etc.), which would be difficult to get otherwise, and more detailed information on the dispersion and deposition processes of transuranic nuclides and the behavior of these nuclides in the environment.
[Mh] Termos MeSH primário: Amerício/análise
Cúrio/análise
Acidente Nuclear de Fukushima
Plutônio/análise
Monitoramento de Radiação/métodos
Cinza Radioativa/análise
[Mh] Termos MeSH secundário: Poeira
Geografia
Japão
Centrais Nucleares
Poluentes Radioativos do Solo/análise
Poluentes Radioativos da Água/análise
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Dust); 0 (Radioactive Fallout); 0 (Soil Pollutants, Radioactive); 0 (Water Pollutants, Radioactive); 53023GN24M (Plutonium); M5LL84MZ2W (Curium); VW92PHU2UY (Americium)
[Em] Mês de entrada:1412
[Cu] Atualização por classe:140428
[Lr] Data última revisão:
140428
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:140218
[St] Status:MEDLINE



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