Base de dados : MEDLINE
Pesquisa : B01.050.150.900.090.608 [Categoria DeCS]
Referências encontradas : 3506 [refinar]
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[PMID]:29483849
[Au] Autor:Hu Q; Wang Q; Meng Y; Tian H; Xiao H
[Ad] Endereço:1Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan, Hubei 430223 China.
[Ti] Título:Comparative transcriptome reveal the potential adaptive evolutionary genes in .
[So] Source:Hereditas;155:18, 2018.
[Is] ISSN:1601-5223
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:To search the evidence of molecular evolution mechanism for aquatic and cave habitat in , the evolution analysis was carried out among several species transcriptome data. The transcriptome data of , and were obtained from the Genbank and reassembled except . The BLAST search of transcriptome data obtained 1244 single-copy orthologous genes among five species A phylogenetic tree showed to have the closest relationship to . Fourteen positively selected genes were detected in and group and fifteen in and group. Five genes were shared in the both groups which involved in the immune system, suggesting that adaptation to an aquatic and cave environment required rapid evolution of the immune system compared to and .
[Mh] Termos MeSH primário: Evolução Molecular
Filogenia
Transcriptoma
Urodelos/genética
[Mh] Termos MeSH secundário: Animais
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180309
[Lr] Data última revisão:
180309
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180228
[St] Status:MEDLINE
[do] DOI:10.1186/s41065-018-0056-6


  2 / 3506 MEDLINE  
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[PMID]:28461043
[Au] Autor:Pei J; Jiang L
[Ad] Endereço:Shaanxi Key Laboratory of Biology and Bioresources, Shaanxi University of Technology, Chaoyang Road, Hanzhong, Shaanxi 723001, China. Electronic address: jinjinpeislg@163.com.
[Ti] Título:Antimicrobial peptide from mucus of Andrias davidianus: screening and purification by magnetic cell membrane separation technique.
[So] Source:Int J Antimicrob Agents;50(1):41-46, 2017 Jul.
[Is] ISSN:1872-7913
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:Andrias davidianus, the Chinese giant salamander, has been used in traditional Chinese medicine for many decades. However, no antimicrobial peptides (AMPs) have been described from A. davidianus until now. Here we describe a novel AMP (andricin 01) isolated from the mucus of A. davidianus. The peptide was recovered using an innovative magnetic cell membrane separation technique and was characterised using mass spectrometry and circular dichroism (CD) spectroscopy. Andricin 01 is comprised of ten amino acid residues with a total molecular mass of 955.1 Da. CD spectrum analysis gave results similar to the archetypal random coil spectrum, consistent with the three-dimensional rendering calculated by current bioinformatics tools. Andricin 01 was found to be inhibitory both to Gram-negative and Gram-positive bacteria. Furthermore, the peptide at the minimal bacterial concentration did not show cell cytotoxicity against human hepatocytes or renal cells and did not show haemolytic activity against red blood cells, indicating that is potentially safe and effective for human use. Andricin 01 shows promise as a novel antibacterial that may provide an insight into the development of new drugs.
[Mh] Termos MeSH primário: Anti-Infecciosos/isolamento & purificação
Anti-Infecciosos/farmacologia
Peptídeos Catiônicos Antimicrobianos/isolamento & purificação
Peptídeos Catiônicos Antimicrobianos/farmacologia
Bactérias/efeitos dos fármacos
Muco/química
Urodelos
[Mh] Termos MeSH secundário: Animais
Anti-Infecciosos/química
Anti-Infecciosos/toxicidade
Peptídeos Catiônicos Antimicrobianos/química
Peptídeos Catiônicos Antimicrobianos/toxicidade
Linhagem Celular
Sobrevivência Celular/efeitos dos fármacos
Dicroísmo Circular
Hepatócitos/efeitos dos fármacos
Seres Humanos
Programas de Rastreamento/métodos
Espectrometria de Massas
Peso Molecular
Conformação Proteica
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Anti-Infective Agents); 0 (Antimicrobial Cationic Peptides)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180222
[Lr] Data última revisão:
180222
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170503
[St] Status:MEDLINE


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[PMID]:29210233
[Au] Autor:Osbourn MS; Connette; Semlitsch RD
[Ti] Título:Effects of fine-scale forest habitat quality on movement and settling decisions in juvenile pond-breeding salamanders.
[So] Source:Ecol Appl;24(7):1719--29, 2014.
[Is] ISSN:1051-0761
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:A better understanding of how individuals respond to variation in habitat quality while moving through heterogeneous habitats is needed to predict ecological phenomena at larger scales, such as local population and metapopulation dynamics. We sought to identify how fine-scale habitat quality affects the decisions of juvenile pond-breeding salamanders (Ambystoma maculatum and A. annulatum) to cease dispersive movements away from their natal pond, select a refuge, and settle. Because of the acute susceptibility of juvenile amphibians to evaporative water loss in terrestrial habitats, we predicted that they possess mechanisms for adjusting their behavior in response to variations in fine-scale habitat quality. We used experimental field enclosures to isolate the effects of habitat quality on settling behavior and employed generalized linear mixed models to examine how manipulations in canopy cover (closed or open) and microhabitat (control, compacted soils, high coarse woody debris, high burrow density), along with environmental variables (rainfall and air temperature), affect the individual's probability of settling. Our results indicated that A. maculatum and A. annulatum had a 10% and 30% decreased probability of settling in open-canopy clearcut habitat, respectively, compared to closed-canopy forest habitat. In addition, A. annulatum were 24% less likely to settle in compacted soil treatments. Although the settlement probability of A. annulatum did not depend on refuge availability, A. maculatum were 18% and 25% more likely to settle under conditions of high burrow density and high coarse woody debris, respectively. These findings make a unique contribution to our understanding of amphibian movement ecology by demonstrating how the interplay of external factors and individual behavior produce observed patterns of movement and habitat selection.
[Mh] Termos MeSH primário: Florestas
Tanques
Reprodução/fisiologia
Urodelos/fisiologia
[Mh] Termos MeSH secundário: Envelhecimento
Distribuição Animal
Animais
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1801
[Cu] Atualização por classe:180108
[Lr] Data última revisão:
180108
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171207
[St] Status:MEDLINE


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[PMID]:28459986
[Au] Autor:Grant AH; Liebgold EB
[Ad] Endereço:Department of Biological Sciences, Salisbury University, 1101 Camden Avenue, Salisbury, MD 21801.
[Ti] Título:Color-Biased Dispersal Inferred by Fine-Scale Genetic Spatial Autocorrelation in a Color Polymorphic Salamander.
[So] Source:J Hered;108(5):588-593, 2017 Jul 01.
[Is] ISSN:1465-7333
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Behavioral traits can be influenced by predation rates of color morphs, potentially leading to reduced boldness or increased escape behaviors in one color morph. The red-backed salamander, Plethodon cinereus, is a small terrestrial salamander whose color morphs have different diets and select different microhabitats, but little is known about potential differences in dispersal behaviors. We used fine-scale genetic spatial autocorrelation to examine 122 P. cinereus in a color-polymorphic population at 10 microsatellite loci in order to generate estimates of spatial genetic structure for each color morph. Differences in spatial genetic structure have been used extensively to infer within-population sex-biased dispersal but have never been used to test for dispersal differences between other groups within populations such as color morphs. We found evidence for color-biased dispersal, but not sex-biased dispersal. Striped salamanders had significant positive genetic structure in the shortest distance classes indicating philopatry. In contrast, unstriped salamanders showed a lack of spatial genetic structure at shorter distances and higher than expected genetic similarity at further distances, as expected if they are dispersing from their natal site. These results show that genetic methods typically used for sex-biased dispersal can be used to investigate differences in dispersal between morphs that vary discretely in polymorphic populations, such as color morphs.
[Mh] Termos MeSH primário: Distribuição Animal
Variação Genética
Pigmentação/genética
Urodelos/fisiologia
[Mh] Termos MeSH secundário: Animais
Repetições de Microssatélites/genética
Urodelos/anatomia & histologia
Urodelos/genética
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1712
[Cu] Atualização por classe:171220
[Lr] Data última revisão:
171220
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170502
[St] Status:MEDLINE
[do] DOI:10.1093/jhered/esx040


  5 / 3506 MEDLINE  
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[PMID]:29053730
[Au] Autor:Cameron AC; Anderson JJ; Page RB
[Ad] Endereço:Department of Biology, John Carroll University, University Heights, Ohio, United States of America.
[Ti] Título:Assessment of intra and interregional genetic variation in the Eastern Red-backed Salamander, Plethodon cinereus, via analysis of novel microsatellite markers.
[So] Source:PLoS One;12(10):e0186866, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:The red-backed salamander (Plethodon cinereus) has long-served as a model system in ecology, evolution, and behavior, and studies surveying molecular variation in this species have become increasingly common over the past decade. However, difficulties are commonly encountered when extending microsatellite markers to populations that are unstudied from a genetic perspective due to high levels of genetic differentiation across this species' range. To ameliorate this issue, we used 454 pyrosequencing to identify hundreds of microsatellite loci. We then screened 40 of our top candidate loci in populations in Virginia, Pennsylvania, and Ohio-including an isolated island population ~ 4.5 km off the shore of Lake Erie (South Bass Island). We identified 25 loci that are polymorphic in a well-studied region of Virginia and 11 of these loci were polymorphic in populations located in the genetically unstudied regions of Ohio and Pennsylvania. Use of these loci to examine patterns of variation within populations revealed that South Bass Island has low diversity in comparison to other sites. However, neither South Bass Island nor isolated populations around Cleveland are inbred. Assessment of variation between populations revealed three well defined genetic clusters corresponding to Virginia, mainland Ohio/Pennsylvania, and South Bass Island. Comparisons of our results to those of others working in various parts of the range are consistent with the idea that differentiation is lower in regions that were once glaciated. However, these comparisons also suggest that well differentiated isolated populations in the formerly glaciated portion of the range are not uncommon. This work provides novel genetic resources that will facilitate population genetic studies in a part of the red-backed salamander's range that has not previously been studied in this manner. Moreover, this work refines our understanding of how neutral variation is distributed in this ecologically important organism.
[Mh] Termos MeSH primário: Marcadores Genéticos
Variação Genética
Repetições de Microssatélites/genética
Urodelos/genética
[Mh] Termos MeSH secundário: Animais
Ohio
Pennsylvania
Virginia
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Genetic Markers)
[Em] Mês de entrada:1711
[Cu] Atualização por classe:171113
[Lr] Data última revisão:
171113
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171021
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0186866


  6 / 3506 MEDLINE  
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[PMID]:28926564
[Au] Autor:Humplik J; Tkacik G
[Ad] Endereço:Institute of Science and Technology Austria, Klosterneuburg, Austria.
[Ti] Título:Probabilistic models for neural populations that naturally capture global coupling and criticality.
[So] Source:PLoS Comput Biol;13(9):e1005763, 2017 Sep.
[Is] ISSN:1553-7358
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Advances in multi-unit recordings pave the way for statistical modeling of activity patterns in large neural populations. Recent studies have shown that the summed activity of all neurons strongly shapes the population response. A separate recent finding has been that neural populations also exhibit criticality, an anomalously large dynamic range for the probabilities of different population activity patterns. Motivated by these two observations, we introduce a class of probabilistic models which takes into account the prior knowledge that the neural population could be globally coupled and close to critical. These models consist of an energy function which parametrizes interactions between small groups of neurons, and an arbitrary positive, strictly increasing, and twice differentiable function which maps the energy of a population pattern to its probability. We show that: 1) augmenting a pairwise Ising model with a nonlinearity yields an accurate description of the activity of retinal ganglion cells which outperforms previous models based on the summed activity of neurons; 2) prior knowledge that the population is critical translates to prior expectations about the shape of the nonlinearity; 3) the nonlinearity admits an interpretation in terms of a continuous latent variable globally coupling the system whose distribution we can infer from data. Our method is independent of the underlying system's state space; hence, it can be applied to other systems such as natural scenes or amino acid sequences of proteins which are also known to exhibit criticality.
[Mh] Termos MeSH primário: Biologia Computacional/métodos
Modelos Neurológicos
Modelos Estatísticos
Neurônios/fisiologia
[Mh] Termos MeSH secundário: Animais
Neurônios Retinianos/fisiologia
Termodinâmica
Urodelos
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171018
[Lr] Data última revisão:
171018
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170920
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pcbi.1005763


  7 / 3506 MEDLINE  
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[PMID]:28900670
[Au] Autor:Basile M; Romano A; Costa A; Posillico M; Scinti Roger D; Crisci A; Raimondi R; Altea T; Garfì V; Santopuoli G; Marchetti M; Salvidio S; De Cinti B; Matteucci G
[Ad] Endereço:Consiglio Nazionale delle Ricerche, Istituto di Biologia Agroambientale e Forestale, Montelibretti, Rome, Italy.
[Ti] Título:Seasonality and microhabitat selection in a forest-dwelling salamander.
[So] Source:Naturwissenschaften;104(9-10):80, 2017 Sep 12.
[Is] ISSN:1432-1904
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:Many small terrestrial vertebrates exhibit limited spatial movement and are considerably exposed to changes in local environmental variables. Among such vertebrates, amphibians at present experience a dramatic decline due to their limited resilience to environmental change. Since the local survival and abundance of amphibians is intrinsically related to the availability of shelters, conservation plans need to take microhabitat requirements into account. In order to gain insight into the terrestrial ecology of the spectacled salamander Salamandrina perspicillata and to identify appropriate forest management strategies, we investigated the salamander's seasonal variability in habitat use of trees as shelters in relation to tree features (size, buttresses, basal holes) and environmental variables in a beech forest in Italy. We used the occupancy approach to assess tree suitability on a non-conventional spatial scale. Our approach provides fine-grained parameters of microhabitat suitability and elucidates many aspects of the salamander's terrestrial ecology. Occupancy changed with the annual life cycle and was higher in autumn than in spring, when females were found closer to the stream in the study area. Salamanders showed a seasonal pattern regarding the trees they occupied and a clear preference for trees with a larger diameter and more burrows. With respect to forest management, we suggest maintaining a suitable number of trees with a trunk diameter exceeding 30 cm. A practice of selective logging along the banks of streams could help maintain an adequate quantity of the appropriate microhabitat. Furthermore, in areas with a presence of salamanders, a good forest management plan requires leaving an adequate buffer zone around streams, which should be wider in autumn than in spring.
[Mh] Termos MeSH primário: Urodelos
[Mh] Termos MeSH secundário: Animais
Feminino
Florestas
Itália
Árvores
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171016
[Lr] Data última revisão:
171016
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170914
[St] Status:MEDLINE
[do] DOI:10.1007/s00114-017-1500-6


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[PMID]:28609856
[Au] Autor:Means DB; Lamb JY; Bernardo J
[Ad] Endereço:Coastal Plains Institute and Land Conservancy, 1313 Milton Street, Tallahassee, FL, 32303, USA. Department of Biological Science, Florida State University, Tallahassee, FL, 32306-4295, USA.. means@bio.fsu.edu.
[Ti] Título:A new species of dusky salamander (Amphibia: Plethodontidae: Desmognathus) from the Eastern Gulf Coastal Plain of the United States and a redescription of D. auriculatus
[So] Source:Zootaxa;4263(3):467-506, 2017 05 10.
[Is] ISSN:1175-5334
[Cp] País de publicação:New Zealand
[La] Idioma:eng
[Ab] Resumo:The Coastal Plain of the southeastern U. S. is one of the planet's top biodiversity hotspots and yet many taxa have not been adequately studied. The plethodontid salamander, Desmognathus auriculatus, was originally thought to occur from east Texas to Virginia, a range spanning dozens of interfluves and large river systems. Beamer and Lamb (2008) found five independent mitochondrial lineages of what has been called D. auriculatus in the Atlantic Coastal Plain, but did not examine the extensive distribution of D. auriculatus in the Gulf Coastal Plain. We present morphological and molecular genetic data distinguishing two evolutionarily independent and distantly related lineages that are currently subsumed under the taxon D. auriculatus in the eastern Gulf Coastal Plain. We describe one of these as a new species, Desmognathus valentinei sp. nov., and assign the second one to D. auriculatus which we formally redescribe.
[Mh] Termos MeSH primário: Urodelos
[Mh] Termos MeSH secundário: Animais
Filogenia
Texas
Estados Unidos
Virginia
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1708
[Cu] Atualização por classe:170810
[Lr] Data última revisão:
170810
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170615
[St] Status:MEDLINE
[do] DOI:10.11646/zootaxa.4263.3.3


  9 / 3506 MEDLINE  
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[PMID]:28594881
[Au] Autor:Freake MJ; DePerno CS
[Ad] Endereço:Department of Natural Sciences and Mathematics, Lee University, Cleveland, Tennessee, United States of America.
[Ti] Título:Importance of demographic surveys and public lands for the conservation of eastern hellbenders Cryptobranchus alleganiensis alleganiensis in southeast USA.
[So] Source:PLoS One;12(6):e0179153, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Comparisons of recent and historic population demographic studies of eastern hellbenders Cryptobranchus alleganiensis alleganiensis have identified significant population declines and extirpations associated with habitat degradation, poor water quality and disease, leading to nomination as a candidate for listing under the Endangered Species Act. However, populations in the southern Appalachian region of the range have received less attention despite relatively high levels of watershed protection due to the establishment of federally protected National Forest and National Park public lands. These watersheds likely represent some of the best remaining available habitat, yet the lack of published studies make assessment of population stability and viability very difficult. Our objectives were to (1) conduct a capture-mark-recapture (CMR) demographic study and a point transect survey on the Hiwassee River in Tennessee which is designated a National Scenic River, and is largely contained within the Cherokee National Forest, (2) quantify the size structure of the population, (3) compare abundance, survival and recruitment with historic and contemporary hellbender populations across the range, (4) assess the importance of this population and the significance of National Forest and National Park lands in the context of hellbender population conservation in the southeastern United States. We detected all age classes present, with larval hellbenders comprising 21.5% of captures. Using a combination of static life table and CMR methods, we determined that survival rates during the first year were low (~10%), but were high (68-94%) for taggable sized hellbenders. Density of hellbenders at the study site was very high (84 taggable sized hellbenders per 100m of river) compared to recent demographic studies conducted in other regions of the range. We detected hellbenders over ~28 km of river, with a mean density of 23 taggable sized hellbenders per 100m of river, and a total population estimate of 6440 taggable hellbenders. National Forest and National Park lands are likely to continue to play a particularly important role in providing suitable habitat for hellbenders in the southern Appalachians. In fact, only six of 21 known hellbender locations in Tennessee appear to show consistent larval recruitment, all of which are located within or adjacent to National Forest or National Park land.
[Mh] Termos MeSH primário: Conservação dos Recursos Naturais
Demografia
Urodelos/fisiologia
[Mh] Termos MeSH secundário: Animais
Geografia
Sedimentos Geológicos
Dinâmica Populacional
Sudeste dos Estados Unidos
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1709
[Cu] Atualização por classe:170918
[Lr] Data última revisão:
170918
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170609
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0179153


  10 / 3506 MEDLINE  
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[PMID]:28520733
[Au] Autor:Katano I; Harada K; Doi H; Souma R; Minamoto T
[Ad] Endereço:School of Human Science and Environment, University of Hyogo, 1-1-12 Shinzaike-Honcho, Himeji Japan.
[Ti] Título:Environmental DNA method for estimating salamander distribution in headwater streams, and a comparison of water sampling methods.
[So] Source:PLoS One;12(5):e0176541, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Environmental DNA (eDNA) has recently been used for detecting the distribution of macroorganisms in various aquatic habitats. In this study, we applied an eDNA method to estimate the distribution of the Japanese clawed salamander, Onychodactylus japonicus, in headwater streams. Additionally, we compared the detection of eDNA and hand-capturing methods used for determining the distribution of O. japonicus. For eDNA detection, we designed a qPCR primer/probe set for O. japonicus using the 12S rRNA region. We detected the eDNA of O. japonicus at all sites (with the exception of one), where we also observed them by hand-capturing. Additionally, we detected eDNA at two sites where we were unable to observe individuals using the hand-capturing method. Moreover, we found that eDNA concentrations and detection rates of the two water sampling areas (stream surface and under stones) were not significantly different, although the eDNA concentration in the water under stones was more varied than that on the surface. We, therefore, conclude that eDNA methods could be used to determine the distribution of macroorganisms inhabiting headwater systems by using samples collected from the surface of the water.
[Mh] Termos MeSH primário: DNA
Água/análise
[Mh] Termos MeSH secundário: Animais
Ecossistema
Geografia
Japão
RNA Ribossômico
Reação em Cadeia da Polimerase em Tempo Real
Análise Espacial
Urodelos/genética
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (RNA, Ribosomal); 0 (RNA, ribosomal, 12S); 059QF0KO0R (Water); 9007-49-2 (DNA)
[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:170519
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0176541



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