Efecto in vitro del peróxido de hidrógeno al 35% sobre el sellado marginal de restauraciones con resina compuesta de nanopartículas

Tesis de pregrado

Homoerotismo feminino na lírica grega arcaica: a poesia de Safo

Desde a Época Helenística até aos nossos dias, a singularidade da poesia de Safo revelou-se um tema controverso, não apenas pelo carácter fragmentário dos textos ou devido à escassa informação sobre a sua praxis no contexto da lírica arcaica grega, mas também por nela aparecer configurada a primeira expressão literária de homoerotismo feminino, que as línguas modernas designam por “lesbianismo” ou “amor sáfico. Se bem que inquestionavelmente anacrónicos e imprecisos, esses termos dominam, hoje, a linguagem sobre a homossexualidade feminina, convertendo a poetisa de Lesbos num ícone singular da moderna conceptualização do amor entre mulheres.

Frederico Lourenço, Poesia Grega, de Álcman a Teócrito, Lisboa, Livros Cotovia, 2006, 175 pp. [ISBN: 972-795-156.2]

Sem resumo disponível.

O amor na poesia de Safo

Resumo indisponível.

Giuliana Ragusa, Lira, mito e erotismo. Afrodite na poesia mélica grega arcaica. Campinas SP, Ed.Unicamp, 2010, 661 pp. (ISBN 978-85-268-0917-8)

Sem resumo disponível.

Airborne remote sensing of ocean wave directional wavenumber spectra in the marginal ice zone

Interactions between surface waves and sea ice are thought to be an important, but poorly understood, physical process in the atmosphere-ice-ocean system. In this work, airborne scanning lidar was used to observe ocean waves propagating into the marginal ice zone (MIZ). These represent the first direct spatial measurements of the surface wave field in the polar MIZ. Data were compared against two attenuation models, one based on viscous dissipation and one based on scattering. Both models were capable of reproducing the measured wave energy. The observed wavenumber dependence of attenuation was found to be consistent with viscous processes, while the spectral spreading of higher wavenumbers suggested a scattering mechanism. Both models reproduced a change in peak direction due to preferential directional filtering. Floe sizes were recorded using co-located visible imagery, and their distribution was found to be consistent with ice breakup by the wave field.

Chronic Polyaromatic Hydrocarbon (PAH) Contamination Is a Marginal Driver for Community Diversity and Prokaryotic Predicted Functioning in Coastal Sediments

Benthic microorganisms are key players in the recycling of organic matter and recalcitrant compounds such as polyaromatic hydrocarbons (PAHs) in coastal sediments. Despite their ecological importance, the response of microbial communities to chronic PAH pollution, one of the major threats to coastal ecosystems, has received very little attention. In one of the largest surveys performed so far on coastal sediments, the diversity and composition of microbial communities inhabiting both chronically contaminated and non-contaminated coastal sediments were investigated using high-throughput sequencing on the 18S and 16S rRNA genes. Prokaryotic alpha-diversity showed significant association with salinity, temperature, and organic carbon content. The effect of particle size distribution was strong on eukaryotic diversity. Similarly to alpha-diversity, beta-diversity patterns were strongly influenced by the environmental filter, while PAHs had no influence on the prokaryotic community structure and a weak impact on the eukaryotic community structure at the continental scale. However, at the regional scale, PAHs became the main driver shaping the structure of bacterial and eukaryotic communities. These patterns were not found for PICRUSt predicted prokaryotic functions, thus indicating some degree of functional redundancy. Eukaryotes presented a greater potential for their use as PAH contamination biomarkers, owing to their stronger response at both regional and continental scales.

Avaliação in vitro da adaptação marginal e interna de coroas de cerâmica e resina composta fabricadas com o sistema CAD/CAM utilizando duas câmeras intraorais de moldagem digital

Dissertação (mestrado)—Universidade de Brasília, Faculdade de Ciências da Saúde, Programa de Pós-Graduação em Ciências da Saúde, 2015.

The responsiveness of government revenue to marginal tax rates

Ce document utilise des données fiscales et démographiques pour calculer les changements dans les recettes du gouvernement engendrés par les ajustements dans le taux marginal d'imposition, et cela en mettant l’accent sur la fourchette d'imposition la plus élevée. La portée de l’étude est une sélection de pays de l’O.C.D.E. Une analyse des changement de comportement des contribuables et des différentes alternatives dont le gouvernement dispose en termes de politique fiscale en suivaient. En fin, les possibles faiblesses dans des techniques de référence sont examinées en détail. 

Paleoenvironments and Geochemical Signals from the Late Barremian to the Middle Aptian in a Tethyan Marginal Basin, Northeast Spain: Implications for Carbon Sequestration in Restricted Basins

The hallmark of oceanic anoxic event 1a (OAE1a) (early Aptian ~125 Ma) corresponds to worldwide deposition of black shales with total organic carbon (TOC) content > 2% and a d13C positive excursion up to ~5‰. OAE1a has been related to large igneous province volcanism and dissociation of methane hydrates during the Lower Cretaceous. However, the occurrence of atypical, coeval and diachronous organic-rich deposits associated with OAE1a, which are also characterized by positive spikes of the d13C in epicontinental to restricted marine environments of the Tethys Ocean, indicates localized responses decoupled from complex global forcing factors. The present research is a high-resolution, multiproxy approach to assess the paleoenvironmental conditions that led to enhanced carbon sequestration from the late Barremian to the middle Aptian in a restricted, Tethyan marginal basin prior to and during OAE1a. I studied the lower 240 m of the El Pui section, Organyà Basin, Spanish Pyrenees. The basin developed as the result of extensional tectonism linked to the opening of the Atlantic Ocean. At the field scale the section consists of a sequence of alternating beds of cm – m-scale, medium-gray to grayish-black limestones and marlstones with TOC up to ~4%. The results indicate that the lowest 85 m of the section, from latest Barremian –earliest Aptian, characterize a deepening phase of the basin concomitant with sustained riverine flux and intensified primary productivity. These changes induced a shift in the sedimentation pattern and decreased the oxygen levels in the water column through organic matter respiration and limited ventilation of the basin. The upper 155 m comprising the earliest – late-early Aptian document the occurrence of OAE1a and its associated geochemical signatures (TOC up to 3% and a positive shift in d13C of ~5‰). However, a low enrichment of redox-sensitive trace elements indicates that the basin did not achieve anoxic conditions. The results also suggest that a shallower-phase of the basin, coeval with platform progradation, may have increased ventilation of the basin at the same time that heightened sedimentation rates and additional input of organic matter from terrestrial sources increased the burial and preservation rate of TOC in the sediment.

The responsiveness of government revenue to marginal tax rates

Ce document utilise des données fiscales et démographiques pour calculer les changements dans les recettes du gouvernement engendrés par les ajustements dans le taux marginal d'imposition, et cela en mettant l’accent sur la fourchette d'imposition la plus élevée. La portée de l’étude est une sélection de pays de l’O.C.D.E. Une analyse des changement de comportement des contribuables et des différentes alternatives dont le gouvernement dispose en termes de politique fiscale en suivaient. En fin, les possibles faiblesses dans des techniques de référence sont examinées en détail. 

"Carlos Alberto Braga: os sinais do segredo", in Razão Poética (poesia 1987-2016), Porto, Cosmorama, 2016.

Estuda-se a poesia de Carlos Braga do ponto de vista duma tradição contemporânea que remonta ao surrealismo.

"O Lugar da poesia em Luís António Verney", in Luiz António Verney e a Cultura Luso-Brasileira do seu Tempo, Lisboa, MIL, 2016

Estuda-se a poética de Verney a partir das cartas iniciais do "Verdadeiro Método de Estudar" dedicadas à Língua, à Retórica e à Poética.

Cotidianidad marginal. La lugbre y frugal vida al interior del lazareto general del Estado de Costa Rica (1833-1850)

Resumen Analiza la problemática, inherente a la asistencia de los internos del lazareto desde su fundación hasta 1845, asi como las diversas estrategias implementadas por los internos para sobrevivir. Abstract The author analizes the problems associated with the care of internees at the lepers asylum from its foundation until 1845,as well as the strategies implemented by the in ternees in order to survive.