1,035 research outputs found
Large-scale distribution of microbial and viral populations in the South Atlantic Ocean
Viruses are abundant, diverse and dynamic compo-nents of the marine environments and play a signi?-cant role in the ocean biogeochemical cycles. Toassess potential variations in the relation betweenviruses and microbes in different geographic regionsand depths, viral and microbial abundance and pro-duction were determined throughout the watercolumn along a latitudinal transect in the South Atlan-tic Ocean. Path analysis was used to examine therelationships between several abiotic and bioticparameters and the different microbial and viral popu-lations distinguished by ?ow cytometry.The depth-integrated contribution of microbial andviral abundance to the total microbial and viralbiomass differed signi?cantly among the differentprovinces. Additionally, the virus-to-microbe ratioincreased with depth and decreased laterally towardsthe more productive regions. Our data revealed thatthe abundance of phytoplankton and microbes is themain controlling factor of the viral populations in theeuphotic and mesopelagic layers, whereas in thebathypelagic realm, viral abundance was only weaklyrelated to the biotic and abiotic variables. The relativecontribution of the three viral populations distin-guished by ?ow cytometry showed a clear geographi-cal pattern throughout the water column, suggestingthat these populations are composed of distinct tax
Avaliação da adoção de cultivares de soja com base na opinião de produtores do DF e entorno.
bitstream/item/83409/1/Bolpd-309.pdf; bitstream/item/83601/1/bolpd-309.pd
Le fabuliste, le professeur de FLE et les méthodologies
Nous nous proposons d’examiner la place tenue par les Fables de La Fontaine dans les différentes méthodologies d’enseignement-apprentissage du FLE (français langue étrangère). Pour mener cette étude, nous avons examiné une sélection représentative de méthodes de FLE destinées à des publics d’enfants, d’adolescents et d\u27adultes, manuels généralistes de langue, mais aussi manuels plus spécifiques consacrés à la découverte de la littérature (type anthologies). Nous avons complété cette étude par celle du Français dans le monde, revue pédagogique à destination des enseignants de FLE.
Les questions posées à partir du corpus retenu concernent la sélection des Fables présentées, leurs modalités de présence et d’exploitation. Nous avons choisi d’envisager la question d’un point de vue diachronique et de nous intéresser à la manière dont la place des Fables varie au gré des méthodologies. Pendant la période envisagée (des années 1950 à aujourd’hui), le texte littéraire a été tout d’abord « sacralisé », puis « désacralisé » (Gruca, 1993) ; depuis une quinzaine d’années, on observe un regain d’intérêt à son endroit, même si de nombreux freins subsistent. Notre étude montre que les Fables sont passées du statut de classique pour les apprenants de FLE à celui d’échantillon du patrimoine culturel français, et nous permet, chemin faisant, d’interroger la place de la littérature et la notion de patrimoine littéraire dans le domaine spécifique du FLE
Taurine: an energy "drink" for deep sea microbes
Presentación oralThe wide use of –omics approaches has led to the discovery of novel metabolic pathways in uncultivated marine bacteria. For example, metagenomic and –proteomic studies revealed that taurine might be an important substrate for heterotrophic marine bacteria. Taurine, an organic acid, is widely produced by marine metazoans and some phytoplankton albeit its concentration and turnover in the ocean has not been determined yet. In this study, we determined the role of taurine as carbon and energy source throughout the water column of the open North Atlantic from the epipelagic to the bathypelagic realm. Bulk uptake and respiration of taurine were measured and microautoradiography was combined with catalyzed reporter deposition fluorescence in situ hybridization to evaluate taurine uptake by specific phylogenetic groups. A shift between the dominant use of taurine as a carbon source from the epi- and mesopelagic (about 40% of taurine respired) to the bathypelagic (76% respired) realm was observed. Taken together, our results indicate that taurine is effectively used by marine prokaryotes, especially in the mesopelagic environment where zooplankton, a potential source for taurine, reside during the day
How SARS-CoV-2 Infection Impacts the Management of Patients with Vulvar Cancer: Experience in a Third-Level Hospital of Southern Italy
: Background: Since February 2020, the spread of Coronavirus Disease 2019 (COVID-19) in Italy has induced the government to call for lockdown of any activity apart from primary needs, and changing the lives of each of us. All that has dramatically impacted the management of patients affected by cancer. Patients with vulvar cancer (VC) represent a particularly frail population because they are elderly and affected by multiple comorbidities. The aim of this study is to evaluate the clinical impact of the SARS-CoV-2 infection on VC patients in terms of delay or impossibility of carrying out the scheduled treatment. Methods: The medical records of patients affected by vulvar tumors, referred to "DAI Materno-Infantile" of AOU Federico II of Naples between February 2020 and January 2022 were retrospectively analyzed. The presence of a positive reverse transcription-polymerase chain reaction (RT-PCR) in nasopharyngeal swab defined the positivity to SARS-CoV-2. Results: Twenty-four patients with VC were analyzed and scheduled for treatment. The median age was 70.7 years (range: 59-80). Seven (29.2%) patients were diagnosed with SARS-CoV-2 infection: In three (42.8%) patients, the treatment was delayed with no apparent consequences, in four (57.2%), the treatment was delayed or changed due to cancer progression and, of these four, one died due to respiratory complications of COVID-19, and one died due to oncologic disease progression. Conclusion: COVID-19 caused, in most cases, significant delays in oncologic treatments and high mortality in our series of patients affected by VC
Contribuição da abordagem geocientífica no ensino fundamental : tempo geológico, origem do petróleo e mudanças ambientais
O presente artigo descreve uma experiência em sala de aula com alunos da 4ª série do ensino fundamental em escola pública em São Paulo, Brasil. Em 2007 foram desenvolvidas atividades do conteúdo programático de Ciências, segundo uma abordagem geológica. O objetivo inicial da professora era dar aos alunos referenciais importantes para explorarem e compreenderem os recursos naturais renováveis e não renováveis, usando como tema gerador o petróleo e as conseqüências ecológicas dos grandes derramamentos ou vazamentos do produto no mar. Baseando-se na metodologia dialética, a partir de argumentações e perguntas elaboradas, procurou-se estabelecer contextos, diferentes significados e representações do assunto, sendo a parceria entre professora e pesquisadora essencial para a superação da fragmentação do saber sobre a questão do conteúdo e sua relação com a didática
The <i>Castalia</i> mission to Main Belt Comet 133P/Elst-Pizarro
We describe Castalia, a proposed mission to rendezvous with a Main Belt Comet (MBC), 133P/Elst-Pizarro. MBCs are a recently discovered population of apparently icy bodies within the main asteroid belt between Mars and Jupiter, which may represent the remnants of the population which supplied the early Earth with water. Castalia will perform the first exploration of this population by characterising 133P in detail, solving the puzzle of the MBC’s activity, and making the first in situ measurements of water in the asteroid belt. In many ways a successor to ESA’s highly successful Rosetta mission, Castalia will allow direct comparison between very different classes of comet, including measuring critical isotope ratios, plasma and dust properties. It will also feature the first radar system to visit a minor body, mapping the ice in the interior. Castalia was proposed, in slightly different versions, to the ESA M4 and M5 calls within the Cosmic Vision programme. We describe the science motivation for the mission, the measurements required to achieve the scientific goals, and the proposed instrument payload and spacecraft to achieve these
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