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[PMID]:29334620
[Au] Autor:Lee SH; Oh JS; Lee KB; Lee JM; Hwang SH; Lee MK; Kwon EH; Kim CS; Choi IH; Yeo IY; Yoon JY; Im JM
[Ad] Endereço:Korea Research Institute of Standards and Science, Daejeon, 34113, Republic of Korea. Electronic address: s.lee@kriss.re.kr.
[Ti] Título:Evaluation of abundance of artificial radionuclides in food products in South Korea and sources.
[So] Source:J Environ Radioact;184-185:46-52, 2018 Apr.
[Is] ISSN:1879-1700
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Food samples are collected nationwide from January 2016 to February 2017 and their contents of artificial radionuclides are measured to address the growing concerns regarding the radioactive contamination of food products in Korea. Specifically, 900 food samples are collected for this study and their contents of representative artificial radionuclides Cs, Cs, Pu, and Sr are analyzed. The analysis shows that the activity concentrations of Cs in fish range from minimum detectable activity (MDA) to 340 mBq/kg of fresh weight. The concentration factor (CF) determined for Cs as a measure of its bioavailability is calculated to be ca. 74 and found to be very similar to that (100) recommended by the International Atomic Energy Agency. With an MDA of <0.221 mBq/kg, the results reveal that Pu values in fish are below the MDA. The activity concentrations of Cs and Sr are lower than the MDA in both shellfish and seaweed, while the activity concentrations of Pu in shellfish range from 0.26 to 2.18 mBq/kg, and for seaweed samples range from 2.07 to 3.38 mBq/kg. The atom ratios of Pu/ Pu in shellfish caught at the Korean coast vary from 0.209 to 0.237, with a mean of 0.227. The higher Pu/ Pu atom ratio determined in shellfish is thought to be caused by the plutonium transported from the Pacific Proving Grounds rather than other sources such as the Fukushima nuclear power plant accident. The activity concentrations of Cs in mushrooms are found to vary from 1.0 to 21.4 Bq/kg, with the highest concentrations observed in the Oak (shiitake) and Sarcodon asparatus. Cs is detected in three mushroom specimens collected from Jeju Island and about 3-3.6% of Cs present in the wild mushrooms native to the Jeju Island are introduced as a result of the Fukushima nuclear plant accident. The annual effective doses of Cs received through consumption of mushrooms and fish are 2.0 × 10 mSv yr and 3.9 × 10 mSv yr , and those values are negligible compared to the annual effective doses limit of 1 mSv yr .
[Mh] Termos MeSH primário: Contaminação Radioativa de Alimentos/análise
Contaminação Radioativa de Alimentos/estatística & dados numéricos
Acidente Nuclear de Fukushima
Monitoramento de Radiação
Poluentes Radioativos
[Mh] Termos MeSH secundário: Animais
Peixes
Plutônio/análise
República da Coreia
Alimentos Marinhos/análise
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Radioactive Pollutants); 53023GN24M (Plutonium)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180220
[Lr] Data última revisão:
180220
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180116
[St] Status:MEDLINE


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[PMID]:28749811
[Au] Autor:Poudel D; Guilmette RA; Klumpp JA; Bertelli L; Waters TL
[Ad] Endereço:*Radiation Protection Division, Los Alamos National Laboratory, Los Alamos, NM 87545; †Ray Guilmette and Associates, LLC, Perry, ME.
[Ti] Título:Application of NCRP 156 Wound Models for the Analysis of Bioassay Data from Plutonium Wound Cases.
[So] Source:Health Phys;113(3):209-219, 2017 09.
[Is] ISSN:1538-5159
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:The NCRP 156 wound model was heavily based on data from animal experiments. The authors of the report acknowledged this limitation and encouraged validation of the models using data from human wound exposures. The objective of this paper was to apply the NCRP 156 wound models to the bioassay data from four plutonium-contaminated wound cases reported in the literature. Because a wide variety of forms of plutonium can be expected at a nuclear facility, a combination of the wound models-rather than a single model-was used to successfully explain both the urinary excretion data and wound retention data in three cases. The data for the fourth case could not be explained by any combination of the default wound models. While this may possibly be attributed to the existence of a category of plutonium whose solubility and chemistry are different than those described by the NCRP 156 default categories, the differences may also be the result of differences in systemic biokinetics. The concept of using a combination of biokinetic models may be extended to inhalation exposures as well, where more than one form of radionuclide-particles of different solubility or different sizes-may exist in a workplace.
[Mh] Termos MeSH primário: Bioensaio
Modelos Biológicos
Plutônio/efeitos adversos
Lesões por Radiação/etiologia
[Mh] Termos MeSH secundário: Cinética
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
53023GN24M (Plutonium)
[Em] Mês de entrada:1708
[Cu] Atualização por classe:180214
[Lr] Data última revisão:
180214
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170728
[St] Status:MEDLINE
[do] DOI:10.1097/HP.0000000000000694


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[PMID]:29306711
[Au] Autor:Bouisset P; Nohl M; Bouville A; Leclerc G
[Ad] Endereço:Institut de Radioprotection et de Sûreté Nucléaire, BP 182 - 98725 Vairao, Tahiti, French Polynesia. Electronic address: patrick.bouisset@mail.pf.
[Ti] Título:Inventory and vertical distribution of Cs, Pu and Pu in soil from Raivavae and Hiva Oa, two French Polynesian islands in the southern hemisphere.
[So] Source:J Environ Radioact;183:82-93, 2018 Mar.
[Is] ISSN:1879-1700
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Atmospheric nuclear weapons tests carried out by the United States, the former Soviet Union, the United Kingdom, France and China between 1945 and 1980 resulted in radioactive fallout over the earth's surface of long-lived radionuclides, such as Cs, Pu and Pu that could be detected more than 50 years after their production. In addition, the burnup in the upper atmosphere of a thermoelectric generator fueled by Pu, SNAP-9A, contributed to the inventory of Pu deposited on the ground. In order to estimate the deposition densities of Cs, Pu and Pu in French Polynesia, we collected undisturbed soil samples up to 30 cm deep at eight sites in two islands (Hiva Oa, 139°W - 10°S and Raivavae, 148°W - 24°S) in 2015-2016. The top 0-10 cm of the soil cores were sliced into five 2-cm layers and the bottom 10-30 cm into four 5-cm layers for gamma spectrometry and alpha spectrometry measurements. We found that more than 50% of the radioactive inventories are still contained within the first 10 cm and that the average vertical migration velocities of Cs and Pu are less than 0.2 cm y . The average accumulated depositions, deduced from the profile measurements, are 236 ±â€¯11 Bq.m and 313 ±â€¯39 Bq.m for Cs, 12.1 ±â€¯1.5 Bq.m and 22.1 ±â€¯1.7 Bq.m for Pu, and 1.23 ±â€¯0.46 Bq.m and 1.58 ±â€¯0.60 Bq.m for Pu, in Hiva Oa and Raivavae, respectively. The Pu/ Pu ratios are 0.102 ±â€¯0.050 at Hiva Oa and 0.072 ±â€¯0.033 at Raivavae. Both values are higher than the ratio in nuclear weapons tests fallout estimated to be 0.016 in 2016 (Hardy et al., 1973), because of the contribution of Pu fallout from SNAP-9A, which is latitude dependent. The Cs/ Pu ratios, 19.5 ±â€¯3.2 at Hiva Oa and 14.2 ±â€¯2.8 at Raivavae are in the lower part of the range of values observed in other regions of the world.
[Mh] Termos MeSH primário: Radioisótopos de Césio/análise
Plutônio/análise
Monitoramento de Radiação
Cinza Radioativa/análise
Poluentes Radioativos do Solo/análise
[Mh] Termos MeSH secundário: Ilhas
Polinésia
Solo
Poluentes Radioativos da Água/análise
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Cesium Radioisotopes); 0 (Radioactive Fallout); 0 (Soil); 0 (Soil Pollutants, Radioactive); 0 (Water Pollutants, Radioactive); 53023GN24M (Plutonium)
[Em] Mês de entrada:1801
[Cu] Atualização por classe:180130
[Lr] Data última revisão:
180130
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180108
[St] Status:MEDLINE


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[PMID]:29202373
[Au] Autor:Abraham J; Meusburger K; Waldis JK; Ketterer ME; Zehringer M
[Ad] Endereço:State-Laboratory Basel-City, Kannenfeldstrasse 2, CH-4056 Basel, Switzerland.
[Ti] Título:Fate of Cs, Sr and Pu in soil profiles at a water recharge site in Basel, Switzerland.
[So] Source:J Environ Radioact;182:85-94, 2018 Feb.
[Is] ISSN:1879-1700
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:An important process in the production of drinking water is the recharge of the withdrawn ground water with river water at protected recharge fields. While it is well known that undisturbed soils are efficiently filtering and adsorbing radionuclides, the goal of this study was to investigate their behaviour in an artificial recharge site that may receive rapid and additional input of radionuclides by river water (particularly when draining a catchment including nuclear power plants (NPP)). Soil profiles of recharge sites were drilled and analysed for radionuclides, specifically radiocesium ( Cs), radiostrontium ( Sr) and plutonium ( Pu). The distribution of the analysed radionuclides were compared with an uncultivated reference soil outside the recharge site. The main activity of Cs was located in the top soil (4.5-7.5 cm) and reached down to a depth of 84 cm and 48 cm for the recharge and the reference site, respectively. The found activities of Pu originate from the global fallout after 1950. Pu appeared to be strongly adsorbed onto soil particles. The shape of the depth profile was similar to Cs, but also similar between the recharge and the reference site. In contrast, Sr showed a uniform distribution over the entire depth of the recharge and reference profiles indicating that Sr already entered the gravel zone and the ground water. Elevated inventories of the radionuclides were observed for the recharge site. The soil of the recharge field exhibited a threefold higher activity of Cs compared to the reference soil. Also for Pu higher inventories where observed for the recharge sites (40%). Sr behaved differently, showing similar inventories between reference and recharge site. We estimate that 75-89% of the total inventory of Cs in the soil at the recharge site (7.000 Bq/m ) originated from the fallout of the Chernobyl accident and from emissions of Swiss NPPs. This estimate is based on the actual activity ratio of Cs/ Pu of 22 for global fallout. The investigations identified radiostrontium as potential threat to the ground water.
[Mh] Termos MeSH primário: Radioisótopos de Césio/análise
Plutônio/análise
Monitoramento de Radiação
Poluentes Radioativos do Solo/análise
Radioisótopos de Estrôncio/análise
[Mh] Termos MeSH secundário: Centrais Nucleares
Suíça
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Cesium Radioisotopes); 0 (Soil Pollutants, Radioactive); 0 (Strontium Radioisotopes); 53023GN24M (Plutonium)
[Em] Mês de entrada:1712
[Cu] Atualização por classe:171228
[Lr] Data última revisão:
171228
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171205
[St] Status:MEDLINE


  5 / 3050 MEDLINE  
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[PMID]:28939090
[Au] Autor:Lal R; Fifield LK; Tims SG; Wasson RJ
[Ad] Endereço:Department of Nuclear Physics, The Australian National University, ACT 0200, Australia; Department of Physics, College of Engineering, Science and Technology, Fiji National University, Fiji. Electronic address: rajeev.lal@fnu.ac.fj.
[Ti] Título:Pu fallout across continental Australia: Implications on Pu use as a soil tracer.
[So] Source:J Environ Radioact;178-179:394-403, 2017 Nov.
[Is] ISSN:1879-1700
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:At present there is a need for the development of new radioisotopes for soil erosion and sediment tracing especially as fallout Cs levels become depleted. Recent studies have shown that Pu can be a useful new soil erosion and sediment radioisotope tracer. Pu was released in the major atmospheric nuclear weapons tests of 1950's and 1960's. However Pu has a half-life of 24110 years and more than 99% of this isotope is still present in the environment today. In contrast Cs with a half-life of 30.07 year has decayed to <35% of initially deposited activities and this isotope will become increasingly difficult to measure in the coming decades especially in the southern hemisphere, which received only about a third of the total global fallout from the atmospheric tests (UNSCEAR, 2000). In this study an assessment of the Pu fallout in Australia was carried out from comparison of measured Pu inventories with expected Pu inventories from fallout models. Pu inventories were also compared with rainfall and measured Pu/ Pu ratios across Australia. Pu fallout inventories ranged from 430 to 1461 µB/cm . Central Australia, with fallout 107% in excess of expected values, seems to be strongly impacted by local fallout deposition. In comparison other sites typically show 5-40% variation between expected and measured fallout values. The fallout inventories were found to weakly correlate (using power functions, y = ax ) with rainfall with r = 0.50 across the southern catchments (25-40°S latitude band). Across the northern catchments (10-25°S latitude band) fallout showed greater variability with rainfall with r = 0.24. Central Australia and Alice Springs which seem to be strongly impacted by local fallout are excluded from the rainfall correlation data (with these sites included r = 0.08 and r < 0.01 respectively). Pu/ Pu atom ratios range from 0.045 to 0.197, with averages of 0.139(0.017), 0.111(0.052) and 0.160(0.027) in the 10-20°S, 20-30°S and 30-40°S latitude bands respectively. The Pu/ Pu atom ratios in Central Australia (0.069) likely represent fallout from the Australian tests which also have low Pu/ Pu atom ratios i.e., Maralinga (0.113) and Montebello (0.045). The average ratios in the 20-30°S and 30-40° bands are closer to the global average (0.139 and 0.177 respectively when not including the close-in fallout data from the nuclear test sites) if the Australian test sites and Central Australian sites are neglected as they clearly represent the effects of close in fallout.
[Mh] Termos MeSH primário: Plutônio/análise
Monitoramento de Radiação/métodos
Cinza Radioativa/análise
Poluentes Radioativos do Solo/análise
[Mh] Termos MeSH secundário: Austrália
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Radioactive Fallout); 0 (Soil Pollutants, Radioactive); 53023GN24M (Plutonium)
[Em] Mês de entrada:1711
[Cu] Atualização por classe:171110
[Lr] Data última revisão:
171110
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170924
[St] Status:MEDLINE


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[PMID]:28846585
[Au] Autor:Schaeffer DM; Case DR; Ingraham JT; Blake PK
[Ad] Endereço:*Leidos, 6909 Metro Park Drive, Alexandria, VA 22310; †Defense Threat Reduction Agency, Nuclear Technologies Department, 8725 John J. Kingman Road, Mail Stop 6201, Fort Belvoir, VA 22060-6201.
[Ti] Título:Plutonium Bioassay Testing of United States Atmospheric Nuclear Test Participants and Occupation Forces of Hiroshima and Nagasaki, Japan.
[So] Source:Health Phys;113(4):246-251, 2017 Oct.
[Is] ISSN:1538-5159
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:The pilot urine plutonium bioassay testing program engaged 100 atomic veterans and 58 persons representative of the United States general population using the fission track analysis technique, developed by Brookhaven National Laboratory. The methodology, collected data, scientific challenges, and test results are presented herein. The Defense Threat Reduction Agency and its predecessor agencies conducted this program in the late 1990s to the mid-2000s to determine the feasibility of bioassay testing to supplement dose reconstruction to estimate atomic veterans' doses under the agency's Nuclear Test Personnel Review Program. In summary, Pu urine bioassay using fission track analysis showed inconsistencies in sample measurement repeatability. To use the analysis as a tool to enhance current processes to perform accurate dose reconstructions requires extensive understanding and resolution of the measurement inconsistencies well beyond the scope of this pilot study. Therefore, fission track analysis (FTA) was found not feasible for implementation on a wide scale basis for atomic veterans.
[Mh] Termos MeSH primário: Armas Nucleares
Plutônio/urina
Veteranos/estatística & dados numéricos
[Mh] Termos MeSH secundário: Adulto
Bioensaio
Seres Humanos
Exposição por Inalação/estatística & dados numéricos
Japão/epidemiologia
Masculino
Exposição à Radiação/análise
Reprodutibilidade dos Testes
Estados Unidos/etnologia
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
53023GN24M (Plutonium)
[Em] Mês de entrada:1709
[Cu] Atualização por classe:170915
[Lr] Data última revisão:
170915
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170829
[St] Status:MEDLINE
[do] DOI:10.1097/HP.0000000000000703


  7 / 3050 MEDLINE  
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[PMID]:28686943
[Au] Autor:Shin C; Choi H; Kwon HM; Jo HJ; Kim HJ; Yoon HJ; Kim DS; Kang GJ
[Ad] Endereço:Food Contaminants Division, Food Safety Evaluation Department, National Food and Drug Safety Evaluation, Ministry of Food and Drug Safety, Osong, Cheongju 28159, Republic of Korea. Electronic address: maggic7@korea.kr.
[Ti] Título:Determination of plutonium isotopes ( Pu) and strontium ( Sr) in seafood using alpha spectrometry and liquid scintillation spectrometry.
[So] Source:J Environ Radioact;177:151-157, 2017 Oct.
[Is] ISSN:1879-1700
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:The present study was carried out to survey the levels of plutonium isotopes ( Pu) and strontium ( Sr) in domestic seafood in Korea. In current, regulatory authorities have analyzed radionuclides, such as Cs, Cs and I, in domestic and imported food. However, people are concerned about contamination of other radionuclides, such as plutonium and strontium, in food. Furthermore, people who live in Korea have much concern about safety of seafood. Accordingly, in this study, we have investigated the activity concentrations of plutonium and strontium in seafood. For the analysis of plutonium isotopes and strontium, a rapid and reliable method developed from previous study was used. Applicability of the test method was verified by examining recovery, minimum detectable activity (MDA), analytical time, etc. Total 40 seafood samples were analyzed in 2014-2015. As a result, plutonium isotopes ( Pu) and strontium ( Sr) were not detected or below detection limits in seafood. The detection limits of plutonium isotopes and strontium-90 were 0.01 and 1 Bq/kg, respectively.
[Mh] Termos MeSH primário: Contaminação Radioativa de Alimentos/análise
Plutônio/análise
Monitoramento de Radiação
Alimentos Marinhos/análise
Radioisótopos de Estrôncio/análise
Poluentes Radioativos da Água/análise
[Mh] Termos MeSH secundário: República da Coreia
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Strontium Radioisotopes); 0 (Water Pollutants, Radioactive); 53023GN24M (Plutonium)
[Em] Mês de entrada:1709
[Cu] Atualização por classe:170908
[Lr] Data última revisão:
170908
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170708
[St] Status:MEDLINE


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[PMID]:28628779
[Au] Autor:Rääf C; Holm E; Rabesiranana N; Garcia-Tenorio R; Chamizo E
[Ad] Endereço:Medical Radiation Physics, ITM, Malmö, Lund University, Sweden. Electronic address: christopher.raaf@med.lu.se.
[Ti] Título:On the presence of plutonium in Madagascar following the SNAP-9A satellite failure.
[So] Source:J Environ Radioact;177:91-99, 2017 Oct.
[Is] ISSN:1879-1700
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:This study examined the Pu and Pu activity concentration and the Pu/ Pu atomic ratio in peat bogs sampled in 2012 from marshlands in central Madagascar. The purpose was to investigate the presence of plutonium isotopes, Pu, from the 1964 satellite failure carrying a SNAP-9A radiothermal generator. With an average Pu/ Pu activity ratio of 0.165 ± 0.02 (decay corrected to 1964), the peat bogs in Madagascar exhibit similar values as the ones found in the southeastern African continent, except they are one order of magnitude higher than expected (0.025) from global fallout in the Southern Hemisphere. The Pu/ Pu atomic ratio showed a distinct decrease for layers dating back to the mid-1960s (down to 0.069 compared with an anticipated ratio of 0.17 for global fallout), indicating that the SNAP-9A failure also resulted in an elevated deposition of Pu. The obtained results demonstrate that further Pu analysis in Madagascar and in southeastern continental Africa is necessary to fully account for the regional Pu deposition from the SNAP-9A event.
[Mh] Termos MeSH primário: Plutônio/análise
Monitoramento de Radiação
Cinza Radioativa
Astronave
[Mh] Termos MeSH secundário: Madagáscar
Solo
Poluentes Radioativos do Solo/análise
Poluentes Radioativos da Água/análise
Zonas Úmidas
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Radioactive Fallout); 0 (Soil); 0 (Soil Pollutants, Radioactive); 0 (Water Pollutants, Radioactive); 53023GN24M (Plutonium)
[Em] Mês de entrada:1709
[Cu] Atualização por classe:171116
[Lr] Data última revisão:
171116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170620
[St] Status:MEDLINE


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[PMID]:28542009
[Au] Autor:Poudel D; Bertelli L; Klumpp JA; Waters TL
[Ad] Endereço:*Radiation Protection Division, Los Alamos National Laboratory, Los Alamos, NM 87545.
[Ti] Título:Interpretation of Urinary Excretion Data From Plutonium Wound Cases Treated With DTPA: Application of Different Models and Approaches.
[So] Source:Health Phys;113(1):30-40, 2017 Jul.
[Is] ISSN:1538-5159
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:After a chelation treatment, assessment of intake and doses is the primary concern of an internal dosimetrist. Using the urinary excretion data from two actual wound cases encountered at Los Alamos National Laboratory (LANL), this paper discusses several methods that can be used to interpret intakes from the urinary data collected after one or multiple chelation treatments. One of the methods uses only the data assumed to be unaffected by chelation (data collected beyond 100 d after the last treatment). This method, used by many facilities for official dose records, was implemented by employing maximum likelihood analysis and Bayesian analysis methods. The impacts of an improper assumption about the physicochemical behavior of a radioactive material and the importance of the use of a facility-specific biokinetic model when available have also been demonstrated. Another method analyzed both the affected and unaffected urinary data using an empirical urinary excretion model. This method, although case-specific, was useful in determining the actual intakes and the doses averted or the reduction in body burdens due to chelation treatments. This approach was important in determining the enhancement factors, the behavior of the chelate, and other observations that may be pertinent to several DTPA compartmental modeling approaches being conducted by the health physics community.
[Mh] Termos MeSH primário: Modelos Biológicos
Ácido Pentético/uso terapêutico
Plutônio/urina
Lesões por Radiação/prevenção & controle
Lesões por Radiação/urina
Micção
[Mh] Termos MeSH secundário: Terapia por Quelação/métodos
Simulação por Computador
Seres Humanos
Masculino
Taxa de Depuração Metabólica
Plutônio/farmacocinética
Dose de Radiação
Monitoramento de Radiação/métodos
Resultado do Tratamento
Ferimentos Penetrantes/metabolismo
Ferimentos Penetrantes/terapia
[Pt] Tipo de publicação:CASE REPORTS; JOURNAL ARTICLE
[Nm] Nome de substância:
53023GN24M (Plutonium); 7A314HQM0I (Pentetic Acid)
[Em] Mês de entrada:1708
[Cu] Atualização por classe:170818
[Lr] Data última revisão:
170818
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170526
[St] Status:MEDLINE
[do] DOI:10.1097/HP.0000000000000662


  10 / 3050 MEDLINE  
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[PMID]:28526526
[Au] Autor:Froehlich MB; Tims SG; Fallon SJ; Wallner A; Fifield LK
[Ad] Endereço:Department of Nuclear Physics, Research School of Physics and Engineering, Australian National University, Canberra, ACT 2601, Australia. Electronic address: michaela.froehlich@anu.edu.au.
[Ti] Título:Nuclear weapons produced U, Pu and Pu archived in a Porites Lutea coral from Enewetak Atoll.
[So] Source:J Environ Radioact;178-179:349-353, 2017 Nov.
[Is] ISSN:1879-1700
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:A slice from a Porites Lutea coral core collected inside the Enewetak Atoll lagoon, within 15 km of all major nuclear tests conducted at the atoll, was analysed for U, Pu and Pu over the time interval 1952-1964 using a higher time resolution than previously reported for a parallel slice from the same core. In addition two sediment samples from the Koa and Oak craters were analysed. The strong peaks in the concentrations of U and Pu in the testing years are confirmed to be considerably wider than the flushing time of the lagoon. This is likely due to the growth mechanism of the coral. Following the last test in 1958 atom concentrations of both U and Pu decreased from their peak values by more than 95% and showed a seasonal signal thereafter. Between 1959 and 1964 the weighted average of the Pu/ Pu atom ratio is 0.124 ± 0.008 which is similar to that in the lagoon sediments (0.129 ± 0.006) but quite distinct from the global fallout value of ∼0.18. This, and the high Pu and U concentrations in the sediments, provides clear evidence that the post-testing signal in the coral is dominated by remobilisation of the isotopes from the lagoon sediments rather than from global fallout.
[Mh] Termos MeSH primário: Armas Nucleares
Plutônio/análise
Monitoramento de Radiação
Cinza Radioativa/análise
Urânio/análise
Poluentes Radioativos da Água/análise
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Radioactive Fallout); 0 (Water Pollutants, Radioactive); 4OC371KSTK (Uranium); 53023GN24M (Plutonium)
[Em] Mês de entrada:1711
[Cu] Atualização por classe:171110
[Lr] Data última revisão:
171110
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170521
[St] Status:MEDLINE



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