Base de dados : MEDLINE
Pesquisa : D01.268.271.100.950 [Categoria DeCS]
Referências encontradas : 5608 [refinar]
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[PMID]:28278767
[Au] Autor:Kim I; Kim GN; Kim SS; Choi JW
[Ad] Endereço:a Korea Atomic Energy Research Institute , Daejeon , Republic of Korea.
[Ti] Título:Development of practical decontamination process for the removal of uranium from gravel.
[So] Source:Environ Technol;39(1):68-73, 2018 Jan.
[Is] ISSN:0959-3330
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:In this study, a practical decontamination process was developed to remove uranium from gravel using a soil washing method. The effects of critical parameters including particle size, H SO concentration, temperature, and reaction time on uranium removal were evaluated. The optimal condition for two-stage washing of gravel was found to be particle size of 1-2 mm, 1.0 M H SO , temperature of 60°C, and reaction time of 3 h, which satisfied the required uranium concentration for self-disposal. Furthermore, most of the extracted uranium was removed from the waste solution by precipitation, implying that the treated solution can be reused as washing solution. These results clearly demonstrated that our proposed process can be indeed a practical technique to decontaminate uranium-polluted gravel.
[Mh] Termos MeSH primário: Recuperação e Remediação Ambiental/métodos
Sedimentos Geológicos/química
Poluentes Radioativos/análise
Urânio/análise
[Mh] Termos MeSH secundário: Descontaminação
Solo/química
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Radioactive Pollutants); 0 (Soil); 4OC371KSTK (Uranium)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180308
[Lr] Data última revisão:
180308
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170311
[St] Status:MEDLINE
[do] DOI:10.1080/09593330.2017.1296026


  2 / 5608 MEDLINE  
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[PMID]:29247935
[Au] Autor:Das N; Das A; Sarma KP; Kumar M
[Ad] Endereço:Department of Environmental Science, Tezpur University, Napaam 784028, Assam, India.
[Ti] Título:Provenance, prevalence and health perspective of co-occurrences of arsenic, fluoride and uranium in the aquifers of the Brahmaputra River floodplain.
[So] Source:Chemosphere;194:755-772, 2018 Mar.
[Is] ISSN:1879-1298
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:The present work focuses on understanding the provenance, prevalence and health perspective of As and F along with possible co-occurrence of uranium (U) in the aquifers of the Brahmaputra floodplains (BFP), India. Groundwater (n = 164) and sediment samples (n = 5) were obtained from the upper, middle and lower BFP. Energy dispersive spectroscopy (EDX) revealed the presence of As, U and Fe in the sediment matrix. Regression analysis showed a weaker relationship between As and F co-occurrence. Hierarchical cluster analysis (HCA) and principal component analysis (PCA) suggested reductive dissolution of Fe (hydr)oxides responsible for As release in the BFP, especially in the upper and lower BFP. Bicarbonate appeared to compete with As oxyanions for adsorption on positively charged surfaces leading to As release. Arsenic desorption in presence of PO , F and HCO at elevated pH appeared greatest in the upper BFP, suggesting the highest potential for co-occurrence. Co-occurrence, were mainly in isolated aquifers of the upper BFP owing to desorption of adsorbed As and F from Fe (hydr)oxides at higher pH. Weathering and dissolution of clay minerals in the upper BFP, and competitive desorption in presence of HCO and PO in the middle and lower BFP, respectively, explain variabilities in F release. Amorphous Fe (hydr)oxides like ferrihydrite act as sinks of U. Concentrations of As and F will likely increase in the future as projected from the saturated levels of goethite and ferrihydrite. Hazard indices (HI) revealed that children (3-8 years) were at greater health risk than adults.
[Mh] Termos MeSH primário: Arsênico/análise
Fluoretos/análise
Água Subterrânea/química
Rios/química
Urânio/análise
Poluentes Químicos da Água/análise
[Mh] Termos MeSH secundário: Adsorção
Adulto
Criança
Pré-Escolar
Análise por Conglomerados
Compostos Férricos/análise
Seres Humanos
Índia
Compostos de Ferro/análise
Minerais/análise
Adulto Jovem
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Ferric Compounds); 0 (Iron Compounds); 0 (Minerals); 0 (Water Pollutants, Chemical); 1310-14-1 (goethite); 4OC371KSTK (Uranium); 87PZU03K0K (ferric oxyhydroxide); N712M78A8G (Arsenic); Q80VPU408O (Fluorides)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180228
[Lr] Data última revisão:
180228
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171217
[St] Status:MEDLINE


  3 / 5608 MEDLINE  
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[PMID]:29407642
[Au] Autor:Murphy DM; Froyd KD; Apel E; Blake D; Blake N; Evangeliou N; Hornbrook RS; Peischl J; Ray E; Ryerson TB; Thompson C; Stohl A
[Ad] Endereço:NOAA ESRL Chemical Sciences Division, Boulder, CO, USA. Electronic address: daniel.m.murphy@noaa.gov.
[Ti] Título:An aerosol particle containing enriched uranium encountered in the remote upper troposphere.
[So] Source:J Environ Radioact;184-185:95-100, 2018 Apr.
[Is] ISSN:1879-1700
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:We describe a submicron aerosol particle sampled at an altitude of 7 km near the Aleutian Islands that contained a small percentage of enriched uranium oxide. U was 3.1 ±â€¯0.5% of U. During twenty years of aircraft sampling of millions of particles in the global atmosphere, we have rarely encountered a particle with a similarly high content of U and never a particle with enriched U. The bulk of the particle consisted of material consistent with combustion of heavy fuel oil. Analysis of wind trajectories and particle dispersion model results show that the particle could have originated from a variety of areas across Asia. The source of such a particle is unclear, and the particle is described here in case it indicates a novel source where enriched uranium was dispersed.
[Mh] Termos MeSH primário: Aerossóis/análise
Poluentes Radioativos do Ar/análise
Monitoramento de Radiação
Urânio/análise
[Mh] Termos MeSH secundário: Alaska
Atmosfera/química
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Aerosols); 0 (Air Pollutants, Radioactive); 4OC371KSTK (Uranium)
[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:180207
[St] Status:MEDLINE


  4 / 5608 MEDLINE  
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[PMID]:29395432
[Au] Autor:Wang WH; Luo XG; Liu L; Zhang Y; Zhao HZ
[Ad] Endereço:College of Environment and Resources, Southwest University of Science and Technology, Mianyang, 621010, China.
[Ti] Título:Ramie (Boehmeria nivea)'s uranium bioconcentration and tolerance attributes.
[So] Source:J Environ Radioact;184-185:152-157, 2018 Apr.
[Is] ISSN:1879-1700
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:The authors sampled and analyzed 15 species of dominant wild plants in Huanan uranium tailings pond in China, whose tailings' uranium contents were 3.21-120.52 µg/g. Among the 15 species of wild plants, ramie (Boehmeria nivea) had the strongest uranium bioconcentration and transfer capacities. In order to study the uranium bioconcentration and tolerance attributes of ramie in detail, and provide a reference for the screening remediation plants to phytoremedy on a large scale in uranium tailings pond, a ramie cultivar Xiangzhu No. 7 pot experiment was carried out. We found that both wild ramie and Xiangzhu No. 7 could bioconcentrate uranium, but there were two differences. One was wild ramie's shoots bioconcentrated uranium up to 20 µg/g (which can be regarded as the critical content value of the shoot of uranium hyperaccumulator) even the soil uranium content was as low as 5.874 µg/g while Xiangzhu No. 7's shoots could reach 20 µg/g only when the uranium treatment concentrations were 275 µg/g or more; the other was that all the transfer factors of 3 wild samples were >1, and the transfer factors of 27 out of 28 pot experiment samples were <1. Probably wild ramie was a uranium hyperaccumulator. Xiangzhu No. 7 satisfied the needs of uranium hyperaccumulator on accumulation capability, tolerance capability, bioconcentration factor, but not transfer capability, so Xiangzhu No. 7 was not a uranium hyperaccumulator. We analyzed the possible reasons why there were differences in the uranium bioconcentration and transfer attributes between wild ramie and Xiangzhu No. 7., and proposed the direction for further research. In our opinion, both the plants which bioconcentrate contaminants in the shoots and roots can act as phytoextractors. Although Xiangzhu No. 7's biomass and accumulation of uranium were concentrated on the roots, the roots were small in volume and easy to harvest. And Xiangzhu No. 7's cultivating skills and protection measures had been developed very well. Xiangzhu No. 7's whole bioconcentration factors and the roots' bioconcentration factors, which were 1.200-1.834 and 1.460-2.341, respectively, increased with the increases of uranium contents of pot soil when the soil's uranium contents are 25-175 µg/g, so it can act as a potential phytoextractor when Huanan uranium tailings pond is phytoremediated.
[Mh] Termos MeSH primário: Biodegradação Ambiental
Boehmeria/fisiologia
Poluentes Radioativos do Solo/metabolismo
Urânio/metabolismo
[Mh] Termos MeSH secundário: Boehmeria/química
China
Poluentes Radioativos do Solo/análise
Urânio/análise
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Soil Pollutants, Radioactive); 4OC371KSTK (Uranium)
[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:180204
[St] Status:MEDLINE


  5 / 5608 MEDLINE  
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[PMID]:29331559
[Au] Autor:Pavliuk AO; Kotlyarevskiy SG; Bespala EV; Zakharova EV; Ermolaev VM; Volkova AG
[Ad] Endereço:Pilot & Demonstration Center for Decommissioning of Uranium-Graphite Nuclear Reactors, 636000, Avtodoroga 13, Seversk, Russia.
[Ti] Título:Experience of on-site disposal of production uranium-graphite nuclear reactor.
[So] Source:J Environ Radioact;184-185:22-31, 2018 Apr.
[Is] ISSN:1879-1700
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:The paper reported the experience gained in the course of decommissioning EI-2 Production Uranium-Graphite Nuclear Reactor. EI-2 was a production Uranium-Graphite Nuclear Reactor located on the Production and Demonstration Center for Uranium-Graphite Reactors JSC (PDC UGR JSC) site of Seversk City, Tomsk Region, Russia. EI-2 commenced its operation in 1958, and was shut down on December 28, 1990, having operated for the period of 33 years all together. The extra pure grade graphite for the moderator, water for the coolant, and uranium metal for the fuel were used in the reactor. During the operation nitrogen gas was passed through the graphite stack of the reactor. In the process of decommissioning the PDC UGR JSC site the cavities in the reactor space were filled with clay-based materials. A specific composite barrier material based on clays and minerals of Siberian Region was developed for the purpose. Numerical modeling demonstrated the developed clay composite would make efficient geological barriers preventing release of radionuclides into the environment.
[Mh] Termos MeSH primário: Grafite
Reatores Nucleares
Resíduos Radioativos/análise
Eliminação de Resíduos/métodos
Urânio
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Radioactive Waste); 4OC371KSTK (Uranium); 7782-42-5 (Graphite)
[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:180115
[St] Status:MEDLINE


  6 / 5608 MEDLINE  
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[PMID]:28462701
[Au] Autor:Faa A; Gerosa C; Fanni D; Floris G; Eyken PV; Lachowicz JI; Nurchi VM
[Ad] Endereço:Istituto di Anatomia Patologica, Dipartimento di Scienze Chirurgiche, University of Cagliari; AOU Cagliari, Cagliari. Italy.
[Ti] Título:Depleted Uranium and Human Health.
[So] Source:Curr Med Chem;25(1):49-64, 2018.
[Is] ISSN:1875-533X
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:Depleted uranium (DU) is generally considered an emerging pollutant, first extensively introduced into environment in the early nineties in Iraq, during the military operation called "Desert Storm". DU has been hypothesized to represent a hazardous element both for soldiers exposed as well as for the inhabitants of the polluted areas in the war zones. In this review, the possible consequences on human health of DU released in the environment are critically analyzed. In the first part, the chemical properties of DU and the principal civil and military uses are summarized. A concise analysis of the mechanisms underlying absorption, blood transport, tissue distribution and excretion of DU in the human body is the subject of the second part of this article. The following sections deal with pathological condition putatively associated with overexposure to DU. Developmental and birth defects, the Persian Gulf syndrome, and kidney diseases that have been associated to DU are the arguments treated in the third section. Finally, data regarding DU exposure and cancer insurgence will be critically analyzed, including leukemia/lymphoma, lung cancer, uterine cervix cancer, breast cancer, bladder cancer and testicular cancer. The aim of the authors is to give a contribution to the debate on DU and its effects on human health and disease.
[Mh] Termos MeSH primário: Neoplasias/induzido quimicamente
Urânio
[Mh] Termos MeSH secundário: Seres Humanos
Urânio/efeitos adversos
Urânio/metabolismo
Urânio/farmacocinética
[Pt] Tipo de publicação:JOURNAL ARTICLE; REVIEW
[Nm] Nome de substância:
4OC371KSTK (Uranium)
[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:170503
[St] Status:MEDLINE
[do] DOI:10.2174/0929867324666170426102343


  7 / 5608 MEDLINE  
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[PMID]:29329319
[Au] Autor:Bader M; Müller K; Foerstendorf H; Schmidt M; Simmons K; Swanson JS; Reed DT; Stumpf T; Cherkouk A
[Ad] Endereço:Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology, Dresden, Germany.
[Ti] Título:Comparative analysis of uranium bioassociation with halophilic bacteria and archaea.
[So] Source:PLoS One;13(1):e0190953, 2018.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Rock salt represents a potential host rock formation for the final disposal of radioactive waste. The interactions between indigenous microorganisms and radionuclides, e.g. uranium, need to be investigated to better predict the influence of microorganisms on the safety assessment of the repository. Hence, the association process of uranium with two microorganisms isolated from rock salt was comparatively studied. Brachybacterium sp. G1, which was isolated from the German salt dome Gorleben, and Halobacterium noricense DSM15987T, were selected as examples of a moderately halophilic bacterium and an extremely halophilic archaeon, respectively. The microorganisms exhibited completely different association behaviors with uranium. While a pure biosorption process took place with Brachybacterium sp. G1 cells, a multistage association process occurred with the archaeon. In addition to batch experiments, in situ attenuated total reflection Fourier-transform infrared spectroscopy was applied to characterize the U(VI) interaction process. Biosorption was identified as the dominating process for Brachybacterium sp. G1 with this method. Carboxylic functionalities are the dominant interacting groups for the bacterium, whereas phosphoryl groups are also involved in U(VI) association by the archaeon H. noricense.
[Mh] Termos MeSH primário: Bactérias/metabolismo
Halobacterium/metabolismo
Urânio/metabolismo
[Mh] Termos MeSH secundário: Bactérias/classificação
Bactérias/crescimento & desenvolvimento
Halobacterium/classificação
Halobacterium/crescimento & desenvolvimento
Microscopia Eletrônica de Varredura
Filogenia
Resíduos Radioativos
Espectrometria por Raios X
Espectroscopia de Infravermelho com Transformada de Fourier
[Pt] Tipo de publicação:COMPARATIVE STUDY; JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Radioactive Waste); 4OC371KSTK (Uranium)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180215
[Lr] Data última revisão:
180215
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180113
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0190953


  8 / 5608 MEDLINE  
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[PMID]:29331769
[Au] Autor:Keatley AC; Martin PG; Hallam KR; Payton OD; Awbery R; Carvalho FP; Oliveira JM; Silva L; Malta M; Scott TB
[Ad] Endereço:Interface Analysis Centre, HH Wills Physics Laboratory, University of Bristol, BS8 1TL, United Kingdom. Electronic address: a.keatley@bristol.ac.uk.
[Ti] Título:Source identification of uranium-containing materials at mine legacy sites in Portugal.
[So] Source:J Environ Radioact;183:102-111, 2018 Mar.
[Is] ISSN:1879-1700
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Whilst prior nuclear forensic studies have focused on identifying signatures to distinguish between different uranium deposit types, this paper focuses on providing a scientific basis for source identification of materials from different uranium mine sites within a single region, which can then be potentially used within nuclear forensics. A number of different tools, including gamma spectrometry, alpha spectrometry, mineralogy and major and minor elemental analysis, have been utilised to determine the provenance of uranium mineral samples collected at eight mine sites, located within three different uranium provinces, in Portugal. A radiation survey was initially conducted by foot and/or unmanned aerial vehicle at each site to assist sample collection. The results from each mine site were then compared to determine if individual mine sites could be distinguished based on characteristic elemental and isotopic signatures. Gamma and alpha spectrometry were used to differentiate between samples from different sites and also give an indication of past milling and mining activities. Ore samples from the different mine sites were found to be very similar in terms of gangue and uranium mineralogy. However, rarer minerals or specific impurity elements, such as calcium and copper, did permit some separation of the sites examined. In addition, classification rates using linear discriminant analysis were comparable to those in the literature.
[Mh] Termos MeSH primário: Monitoramento de Radiação/métodos
Poluentes Radioativos do Solo/análise
Urânio/análise
[Mh] Termos MeSH secundário: Mineração
Portugal
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Soil Pollutants, Radioactive); 4OC371KSTK (Uranium)
[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:180115
[St] Status:MEDLINE


  9 / 5608 MEDLINE  
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[PMID]:29288938
[Au] Autor:Bianchi S; Plastino W
[Ad] Endereço:Department of Mathematics and Physics, Roma Tre University, Via della Vasca Navale, 84, I-00146, Rome, Italy. Electronic address: stefano.bianchi@uniroma3.it.
[Ti] Título:Uranium time series analysis: A new methodological approach for event screening categorisation.
[So] Source:J Environ Radioact;183:37-40, 2018 Mar.
[Is] ISSN:1879-1700
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Uranium (U) groundwater anomalies, detected before the L'Aquila earthquake (April 6th, 2009), represent a key geochemical signal of a progressive increase of deep fluids fluxes at middle-lower crustal levels associated with the geodynamics of the earthquake. Although the analyses performed in association with the seismic pattern around Gran Sasso National Laboratory and the geophysical and geochemical patterns of the Gran Sasso aquifer supported this hypothesis, a new approach for time series analysis has been developed for event screening categorisation and to highlight U as possible strain meter in geodynamical processes, particularly those which characterise active normal faulting.
[Mh] Termos MeSH primário: Monitoramento de Radiação/métodos
Urânio/análise
Poluentes Radioativos da Água/análise
Poluição Química da Água/estatística & dados numéricos
[Mh] Termos MeSH secundário: Terremotos
Água Subterrânea/química
Itália
Liberação Nociva de Radioativos
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Water Pollutants, Radioactive); 4OC371KSTK (Uranium)
[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:171231
[St] Status:MEDLINE


  10 / 5608 MEDLINE  
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[PMID]:29220714
[Au] Autor:Sálek O; Matolín M; Gryc L
[Ad] Endereço:Charles University, Faculty of Science, Institute of Hydrogeology, Engineering Geology and Applied Geophysics, Czech Republic. Electronic address: ondrej.salek@natur.cuni.cz.
[Ti] Título:Mapping of radiation anomalies using UAV mini-airborne gamma-ray spectrometry.
[So] Source:J Environ Radioact;182:101-107, 2018 Feb.
[Is] ISSN:1879-1700
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Localization of size-limited gamma-ray anomalies plays a fundamental role in uranium prospecting and environmental studies. Possibilities of a newly developed mini-airborne gamma-ray spectrometric equipment were tested on a uranium anomaly near the village of Trebsko, Czech Republic. The measurement equipment was based on a scintillation gamma-ray spectrometer specially developed for unmanned aerial vehicles (UAV) mounted on powerful hexacopter. The gamma-ray spectrometer has two 103 cm BGO scintillation detectors of relatively high sensitivity. The tested anomaly, which is 80 m by 40 m in size, was investigated by ground gamma-ray spectrometric measurement in a detail rectangular measurement grid. Average uranium concentration is 25 mg/kg eU attaining 700 mg/kg eU locally. The mini-airborne measurement across the anomaly was carried out on three 100 m long parallel profiles at eight flight altitudes from 5 to 40 m above the ground. The resulting 1 s 1024 channel gamma-ray spectra, recorded in counts per second (cps), were processed to concentration units of K, U and Th, while total count (TC) was reported in cps. Increased gamma ray intensity of the anomaly was indicated by mini-airborne measurement at all profiles and altitudes, including the highest altitude of 40 m, at which the recorded intensity is close to the natural radiation background. The reported instrument is able to record data with comparable quality as standard airborne survey, due to relative sensitive detector, lower flight altitude and relatively low flight speed of 1 m/s. The presented experiment brings new experience with using unmanned semi-autonomous aerial vehicles and the latest mini-airborne radiometric instrument. The experiment has demonstrated the instrument's ability to localize size-limited uranium anomalies.
[Mh] Termos MeSH primário: Poluentes Radioativos do Ar/análise
Monitoramento de Radiação/métodos
Espectrometria gama
[Mh] Termos MeSH secundário: Altitude
República Tcheca
Urânio/análise
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Air Pollutants, Radioactive); 4OC371KSTK (Uranium)
[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:171209
[St] Status:MEDLINE



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