Base de dados : MEDLINE
Pesquisa : G01.311 [Categoria DeCS]
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  1 / 3073 MEDLINE  
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[PMID]:29360857
[Au] Autor:Rudi G; Bailly JS; Vinatier F
[Ad] Endereço:LISAH, Univ Montpellier, INRA, IRD, Montpellier SupAgro, Montpellier, France.
[Ti] Título:Using geomorphological variables to predict the spatial distribution of plant species in agricultural drainage networks.
[So] Source:PLoS One;13(1):e0191397, 2018.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:To optimize ecosystem services provided by agricultural drainage networks (ditches) in headwater catchments, we need to manage the spatial distribution of plant species living in these networks. Geomorphological variables have been shown to be important predictors of plant distribution in other ecosystems because they control the water regime, the sediment deposition rates and the sun exposure in the ditches. Whether such variables may be used to predict plant distribution in agricultural drainage networks is unknown. We collected presence and absence data for 10 herbaceous plant species in a subset of a network of drainage ditches (35 km long) within a Mediterranean agricultural catchment. We simulated their spatial distribution with GLM and Maxent model using geomorphological variables and distance to natural lands and roads. Models were validated using k-fold cross-validation. We then compared the mean Area Under the Curve (AUC) values obtained for each model and other metrics issued from the confusion matrices between observed and predicted variables. Based on the results of all metrics, the models were efficient at predicting the distribution of seven species out of ten, confirming the relevance of geomorphological variables and distance to natural lands and roads to explain the occurrence of plant species in this Mediterranean catchment. In particular, the importance of the landscape geomorphological variables, ie the importance of the geomorphological features encompassing a broad environment around the ditch, has been highlighted. This suggests that agro-ecological measures for managing ecosystem services provided by ditch plants should focus on the control of the hydrological and sedimentological connectivity at the catchment scale. For example, the density of the ditch network could be modified or the spatial distribution of vegetative filter strips used for sediment trapping could be optimized. In addition, the vegetative filter strips could constitute new seed bank sources for species that are affected by the distance to natural lands and roads.
[Mh] Termos MeSH primário: Agricultura/métodos
Ecossistema
Plantas
[Mh] Termos MeSH secundário: Meio Ambiente
França
Fenômenos Geológicos
Região do Mediterrâneo
Modelos Biológicos
Especificidade da Espécie
Água
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
059QF0KO0R (Water)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180227
[Lr] Data última revisão:
180227
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180124
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0191397


  2 / 3073 MEDLINE  
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[PMID]:29020022
[Au] Autor:Rodriguez J; Waichert C; von Dohlen CD; Pitts JP
[Ad] Endereço:CSIRO, Australian National Insect Collection, Acton, ACT, Australia.
[Ti] Título:The geological record and phylogeny of spider wasps (Hymenoptera: Pompilidae): A revision of fossil species and their phylogenetic placement.
[So] Source:PLoS One;12(10):e0185379, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Accurate fossil identification has become increasingly relevant with the widespread use of phylogenetic divergence time estimation methods, which rely on fossil data to determine clade hard-minimum ages. Here we revise, diagnose and illustrate known spider wasp (Hymenoptera: Pompilidae) fossil species and place them within the latest Pompilidae phylogenetic hypothesis. Ceropalites infelix Cockerell, from the Florissant Fossil Beds (Priabonian), is no longer recognized as Pompilidae, but as Aulacidae. Agenioideus saxigenus (Cockerell) comb. nov., Deuteragenia wettweri (Statz) comb. nov., Caputelus scudderi (Cockerell, 1906) comb. nov., Pepsinites avitula (Cockerell, 1941) comb. nov., Pepsinites contentus (Theobald, 1937) comb. nov., Pepsinites florissantensis (Cockerell, 1906) comb. nov., Pepsinites laminarum (Rohwer, 1909) comb. nov., Pepsinites scelerosus (Meunier, 1919) comb. nov., Pepsinites cockerellae (Rohwer, 1909) comb. nov., Pompilinites coquandi (Theobald, 1937) comb. nov., Pompilinites depressus (Statz, 1936) comb. nov., Pompilites incertus (Theobald, 1937) comb. nov., Pompilites induratus (Heer, 1849) comb. nov., Pompilites fasciatus (Theobald, 1937) comb. nov., and Pompilites senex comb. nov. are new combinations. Twenty-three fossil species of spider wasps are now recognized in 13 genera. Four new genera are proposed: Caputelus Waichert & Pitts gen. nov., Pompilites Rodriguez gen. nov., Pompilinites Rodriguez & Waichert gen. nov., and Pepsinites Rodriguez & Waichert gen. nov., of which the three latter are collective-group names for fossils with taxonomic uncertainty. One species of fossil spider wasp is described: Deuteragenia catalunyia Rodriguez, Waichert & Pitts sp. nov., from the Bellver deposits in Catalonia, Spain. Five of the 23 known species can be used to determine hard-minimum age for calibrations of genera stem-groups (Agenioideus, Anoplius, Cryptocheilus, Deuteragenia, Priocnemis). The fossil belonging to the stem-group of the tribe Ageniellini (Chubutholites) is not recommended for calibration because of the high uncertainty in its age and taxonomy. The remaining taxa can be assigned to the lineage comprising Pompilinae + Pepsinae (12 species) or crown-group Pompilidae (four species).
[Mh] Termos MeSH primário: Fósseis
Fenômenos Geológicos
Filogenia
Vespas/classificação
[Mh] Termos MeSH secundário: Animais
Especificidade da Espécie
Fatores de Tempo
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171031
[Lr] Data última revisão:
171031
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171012
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0185379


  3 / 3073 MEDLINE  
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[PMID]:28980664
[Ti] Título:Discoveries have awkward first dates.
[So] Source:Nature;550(7674):7, 2017 10 02.
[Is] ISSN:1476-4687
[Cp] País de publicação:England
[La] Idioma:eng
[Mh] Termos MeSH primário: Fenômenos Geológicos
[Pt] Tipo de publicação:EDITORIAL; COMMENT
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171017
[Lr] Data última revisão:
171017
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171006
[St] Status:MEDLINE
[do] DOI:10.1038/550007a


  4 / 3073 MEDLINE  
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[PMID]:28731295
[Au] Autor:Cullen JT; McAlister J
[Ti] Título:Biogeochemistry of Lead. Its Release to the Environment and Chemical Speciation.
[So] Source:Met Ions Life Sci;17, 2017 04 10.
[Is] ISSN:1559-0836
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:Lead (Pb) is a metal that is not essential for life processes and proves acutely toxic to most organisms. Compared to other metals Pb is rather immobile in the environment but still its biogeochemical cycling is greatly perturbed by human activities. In this review we present a summary of information describing the physical and chemical properties of Pb, its distribution in crustal materials, and the processes, both natural and anthropogenic, that contribute to the metal's mobilization in the biosphere. The relatively high volatility of Pb metal, low melting point, its large ionic radius, and its chemical speciation in aquatic systems contributes to its redistribution by anthropogenic and natural processes. The biogeochemical cycle of Pb is significantly altered by anthropogenic inputs. This alteration began in antiquity but accelerated during the industrial revolution, which sparked increases in both mining activities and fossil fuel combustion. Estimates of the flux of Pb to the atmosphere, its deposition and processing in soils and freshwater systems are presented. Finally, the basin scale distribution of dissolved Pb in the ocean is interpreted in light of the chemical speciation and association with inorganic and organic particulate matter. The utility of stable radiogenic Pb isotopes, as a complement to concentration data, to trace inputs to the ocean, better understand the biogeochemical cycling of Pb and track water mass circulation in the ocean is discussed. An ongoing international survey of trace elements and their isotopes in seawater will undoubtedly increase our understanding of the deposition, biogeochemical cycling and fate of this infamous toxic metal.
[Mh] Termos MeSH primário: Chumbo/química
Chumbo/toxicidade
[Mh] Termos MeSH secundário: Animais
Fenômenos Bioquímicos
Poluentes Ambientais
Fenômenos Geológicos
Seres Humanos
Oceanos e Mares
Poluentes Químicos da Água/análise
Poluentes Químicos da Água/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Environmental Pollutants); 0 (Water Pollutants, Chemical); 2P299V784P (Lead)
[Em] Mês de entrada:1709
[Cu] Atualização por classe:170914
[Lr] Data última revisão:
170914
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170722
[St] Status:MEDLINE


  5 / 3073 MEDLINE  
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[PMID]:28700595
[Au] Autor:de Oliveira Junior JC; Beirigo RM; Chiapini M; do Nascimento AF; Couto EG; Vidal-Torrado P
[Ad] Endereço:Department of Agronomy, Federal University of Technology-Parana, Dois Vizinhos, Parana, Brazil.
[Ti] Título:Origin of mounds in the Pantanal wetlands: An integrated approach between geomorphology, pedogenesis, ecology and soil micromorphology.
[So] Source:PLoS One;12(7):e0179197, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Vegetated mounds are an important geomorphological feature of the Pantanal, where the influence of floods dictates not only hydropedological processes, but also the distribution and ecology of the flora and fauna. This work aimed to identify factors and processes that influence the formation and spatial distribution of the mounds, which are commonly associated with termite activity. In order to characterize pedological processes, macro and micro morphological descriptions, satellite image interpretation, dating of the sandy sedimentary material using OSL and carbon dating using 14C AMS were carried out. This dating of the materials indicates that the sediments in which the soils were formed were deposited during the Pleistocene, while the carbonates are from the Holocene. The basin-like format of the laminar structures suggests that part of the more clayey material was deposited in lacustrine environments. The more humid climate in the Holocene intensified argilluviation, which at an advanced stage, led to a more pronounced textural gradient, reducing drainage and leading to ferrolysis and thickening of the E horizon. Besides pedogenic processes, more erosive flooding during the Holocene began reducing and rounding the landscape's more elevated structures (paleolevees). In the final stage, these structures were occupied by termites to shelter from flooding. Thereafter, the bio-cementation action of the termite nests has increased the resistance of the vegetated mounds to processes of erosion.
[Mh] Termos MeSH primário: Sedimentos Geológicos/química
Isópteros/fisiologia
Datação Radiométrica/métodos
Imagens de Satélites/métodos
Solo/química
Zonas Úmidas
[Mh] Termos MeSH secundário: Animais
Brasil
Fenômenos Geológicos
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Soil)
[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:170713
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0179197


  6 / 3073 MEDLINE  
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[PMID]:28667543
[Au] Autor:Jachymova B; Krasa J
[Ad] Endereço:Department of Irrigation, Drainage and Landscape Engineering, Faculty of Civil Engineering, Czech Technical University in Prague, Thakurova 7, 16629, Prague, Czech Republic. barbora.jachymova@fsv.cvut.cz.
[Ti] Título:A new method for modeling dissolved phosphorus transport with the use of WaTEM/SEDEM.
[So] Source:Environ Monit Assess;189(8):365, 2017 Aug.
[Is] ISSN:1573-2959
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:This paper presents a newly-derived method for directly determining the amount of transported dissolved phosphorus by water erosion. The results of the method are compared to prediction based on enrichment ratio (as proposed by Sharpley) and average share of dissolved phosphorus (DP) in total transported phosphorus (5%) that is widely used in the Czech Republic. Four study areas (catchments of dozens of sq. kilometer) were chosen for their different characteristics (land use, average slope, average elevation, phosphorus concentration in the soil) which influence their rainfall-runoff behavior. The modeled results are compared with data measured in situ. The two methods provide similar results in intensively agriculturally used regions. Agreement among the methods was observed for three study areas with significant erosion intensity (above 4 t/ha/year). In the catchment with significantly lower erosion intensity (0.5 t/ha/year), the indirect method (Sharpley) underestimates the amount of DP transported in the watercourses. The sum of transports of suspended solids into watercourses and the average available phosphorus content in the soil determined by the Mehlich 3 method (P ) are the main factors influencing the results provided by the two methods. An analysis of the impact of these factors on the difference between the results of the methods was provided. Transport of suspended solids is related to the method difference (R range from 0.37 to 0.71). However, no significant relationship was found between the difference in the results and the average P content in the soil (R range from 0.15 to 0.36).
[Mh] Termos MeSH primário: Monitoramento Ambiental/métodos
Modelos Químicos
Fósforo/análise
Poluentes da Água/análise
[Mh] Termos MeSH secundário: Agricultura
República Tcheca
Fenômenos Geológicos
Solo
Poluentes do Solo/análise
Água/análise
Movimentos da Água
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Soil); 0 (Soil Pollutants); 0 (Water Pollutants); 059QF0KO0R (Water); 27YLU75U4W (Phosphorus)
[Em] Mês de entrada:1708
[Cu] Atualização por classe:171116
[Lr] Data última revisão:
171116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170702
[St] Status:MEDLINE
[do] DOI:10.1007/s10661-017-6082-4


  7 / 3073 MEDLINE  
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[PMID]:28586679
[Au] Autor:Danovaro R; Corinaldesi C; Dell'Anno A; Snelgrove PVR
[Ad] Endereço:Department of Life and Environmental Sciences, Polytechnic University of Marche, Italy; Stazione Zoologica Anton Dohrn Naples, Italy. Electronic address: r.danovaro@univpm.it.
[Ti] Título:The deep-sea under global change.
[So] Source:Curr Biol;27(11):R461-R465, 2017 Jun 05.
[Is] ISSN:1879-0445
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:The deep ocean encompasses 95% of the oceans' volume and is the largest and least explored biome of Earth's Biosphere. New life forms are continuously being discovered. The physiological mechanisms allowing organisms to adapt to extreme conditions of the deep ocean (high pressures, from very low to very high temperatures, food shortage, lack of solar light) are still largely unknown. Some deep-sea species have very long life-spans, whereas others can tolerate toxic compounds at high concentrations; these characteristics offer an opportunity to explore the specialized biochemical and physiological mechanisms associated with these responses. Widespread symbiotic relationships play fundamental roles in driving host functions, nutrition, health, and evolution. Deep-sea organisms communicate and interact through sound emissions, chemical signals and bioluminescence. Several giants of the oceans hunt exclusively at depth, and new studies reveal a tight connection between processes in the shallow water and some deep-sea species. Limited biological knowledge of the deep-sea limits our capacity to predict future response of deep-sea organisms subject to increasing human pressure and changing global environmental conditions. Molecular tools, sensor-tagged animals, in situ and laboratory experiments, and new technologies can enable unprecedented advancement of deep-sea biology, and facilitate the sustainable management of deep ocean use under global change.
[Mh] Termos MeSH primário: Mudança Climática
Ecossistema
Peixes/fisiologia
Oceanos e Mares
[Mh] Termos MeSH secundário: Animais
Fenômenos Geológicos
Dinâmica Populacional
Fatores de Tempo
Microbiologia da Água
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1711
[Cu] Atualização por classe:171109
[Lr] Data última revisão:
171109
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170607
[St] Status:MEDLINE


  8 / 3073 MEDLINE  
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[PMID]:28545600
[Au] Autor:Yihdego Y; Al-Weshah RA
[Ti] Título:Hydrocarbon Assessment and Prediction due to the Gulf War Oil Disaster, North Kuwait.
[So] Source:Water Environ Res;89(6):484-499, 2017 Jun 01.
[Is] ISSN:1061-4303
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Oil spill in the Gulf was the biggest disaster in history. The scale of damage was enormous, ranging from destruction caused by oil fires and oil spills, to economic decline for the Kuwaiti oil industry. The transport modelling of the freshwater aquifers in north Kuwait was undertaken to assess potential remediation scenarios using the MODFLOW-SURFACT numerical code. Three interlinked models were calibrated: flow, density (salinity), and transport. The model domain is a subregional area encompassing the Al-Raudhatain and Umm Al-Aish Basins. The time-variant salinity transport model was calibrated simultaneously with the transient groundwater flow system and this includes variably saturated flow and transport. This was done prior to proceeding to simulate contaminant hydrocarbon transport, as the hydraulic gradients and flow directions (and storage volume) are significant controls on contaminant migration. The results depicted after 23 years and with respect to the total area of the freshwater body at Al-Raudhatain (55.2 km2) and Umm Al-Aish (37 km2); the areal extent of the total petroleum hydrocarbon plume is estimated to be 7.3 and 8.7 km2 for the 0.1 mg/L contour, respectively. This equates to total petroleum hydrocarbon impacting 13 and 24% of the Al-Raudhatain and Umm Al-Aish freshwater bodies, respectively. The simulation indicated that even though total petroleum hydrocarbon loading was negligible in the center of the Al-Raudhatain depression up until the recent past, what has entered the groundwater system earlier from the contamination sources (pits, fringes, and lakes) is still moving toward the freshwater lenses or is potentially undetected due to lack of optimal existing monitoring bore screen and depth installations (plume diving). This implies that the environment is be the victim of war (the Gulf Crisis). The ecological and economic full impact probably will not be realized in the near future.
[Mh] Termos MeSH primário: Monitoramento Ambiental
Guerra do Golfo
Poluição por Petróleo
Poluentes Químicos da Água/química
Poluição da Água
[Mh] Termos MeSH secundário: Fenômenos Geológicos
Água Subterrânea
Kuweit
Poluentes do Solo/análise
Abastecimento de Água
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Soil Pollutants); 0 (Water Pollutants, Chemical)
[Em] Mês de entrada:1707
[Cu] Atualização por classe:170726
[Lr] Data última revisão:
170726
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170527
[St] Status:MEDLINE
[do] DOI:10.2175/106143016X14798353399250


  9 / 3073 MEDLINE  
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[PMID]:28542280
[Au] Autor:Lera I; Pérez T; Guerrero C; Eguíluz VM; Juiz C
[Ad] Endereço:Departamento de Matemáticas e Informática. Universitat de les Illes Balears, Palma de Mallorca, Spain.
[Ti] Título:Analysing human mobility patterns of hiking activities through complex network theory.
[So] Source:PLoS One;12(5):e0177712, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:The exploitation of high volume of geolocalized data from social sport tracking applications of outdoor activities can be useful for natural resource planning and to understand the human mobility patterns during leisure activities. This geolocalized data represents the selection of hike activities according to subjective and objective factors such as personal goals, personal abilities, trail conditions or weather conditions. In our approach, human mobility patterns are analysed from trajectories which are generated by hikers. We propose the generation of the trail network identifying special points in the overlap of trajectories. Trail crossings and trailheads define our network and shape topological features. We analyse the trail network of Balearic Islands, as a case of study, using complex weighted network theory. The analysis is divided into the four seasons of the year to observe the impact of weather conditions on the network topology. The number of visited places does not decrease despite the large difference in the number of samples of the two seasons with larger and lower activity. It is in summer season where it is produced the most significant variation in the frequency and localization of activities from inland regions to coastal areas. Finally, we compare our model with other related studies where the network possesses a different purpose. One finding of our approach is the detection of regions with relevant importance where landscape interventions can be applied in function of the communities.
[Mh] Termos MeSH primário: Sistemas de Informação Geográfica
Atividades de Lazer
Caminhada
[Mh] Termos MeSH secundário: Algoritmos
Fenômenos Geológicos
Seres Humanos
Modelos Teóricos
Estações do Ano
Espanha
Esportes
Tempo (Meteorologia)
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1709
[Cu] Atualização por classe:170911
[Lr] Data última revisão:
170911
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170526
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0177712


  10 / 3073 MEDLINE  
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[PMID]:28445508
[Au] Autor:Ge Z; Liu S; Li G; Huang Y; Wang Y
[Ad] Endereço:School of Astronautics, Northwestern Polytechnical University, Xi'an, Shaan xi Province, People's Republic of China.
[Ti] Título:Error model of geomagnetic-field measurement and extended Kalman-filter based compensation method.
[So] Source:PLoS One;12(4):e0173962, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:The real-time accurate measurement of the geomagnetic-field is the foundation to achieving high-precision geomagnetic navigation. The existing geomagnetic-field measurement models are essentially simplified models that cannot accurately describe the sources of measurement error. This paper, on the basis of systematically analyzing the source of geomagnetic-field measurement error, built a complete measurement model, into which the previously unconsidered geomagnetic daily variation field was introduced. This paper proposed an extended Kalman-filter based compensation method, which allows a large amount of measurement data to be used in estimating parameters to obtain the optimal solution in the sense of statistics. The experiment results showed that the compensated strength of the geomagnetic field remained close to the real value and the measurement error was basically controlled within 5nT. In addition, this compensation method has strong applicability due to its easy data collection and ability to remove the dependence on a high-precision measurement instrument.
[Mh] Termos MeSH primário: Campos Magnéticos
Modelos Teóricos
[Mh] Termos MeSH secundário: Algoritmos
Fenômenos Geológicos
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1709
[Cu] Atualização por classe:170906
[Lr] Data última revisão:
170906
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170427
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0173962



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