As três eras do Atlântico Sul

The te x t discusses the historical specificities of the South Atlantic area based on three periods since the arrival of Pedro Álvares Cabral in 1500, passing through the opening of the Suez Canal (1869), until the end of the apartheid in South Africa (1991-1994), events that support the reemergence of south-south bonds in the Atlantic Ocean. Thus, this article explores the cultural dimension of South Atlantic connections, although it focuses primarily on the construction of the space-temporal concept.O texto discute as especificidades históricas do espaço sul-atlântico com base em três períodos a partir da chegada de Pedro Álvares Cabral, em 1500, passando pela abertura do Canal de Suez (1869), até o fim do apartheid na África do Sul (1991-1994), acontecimentos que favorecem a reemergência dos laços sul-sul no Atlântico. Assim, o artigo explora a dimensão cultural das conexões sul-atlânticas, embora se centre, fundamentalmente, na construção do conceito espaço-temporal

Brominated Flame Retardants in Fish of Lake Geneva (Switzerland)

Polybrominated diphenyl ethers (PBDEs) and hexabromocyclododecane (HBCD) were determined in fish (Salmo trutta forma lacustris) from Lake Geneva. Brominated flame retardants were detected in all nine samples with an average concentration for the sum of BDE-28, BDE-47, BDE-49, BDE-66, BDE-99, BDE-100, BDE-119, BDE-153, BDE-154 and BDE-209 of 207ng per g lipid weight (ngglw−1). The congener patterns were dominated by BDE-47. The average concentration of HBCD was 168ngglw−

Os lusobrasileiros em Angola : constituição do espaço economico brasileiro no atlântico sul 1550-1700

Tese (livre-docencia) - Universidade Estadual de Campinas, Instituto de EconomiaResumo: Não informadoAbstract: Not informedLivre DocênciaLivre-Docente em Historia Economic

Brominated Flame Retardants in Fish of Lake Geneva (Switzerland)

Polybrominated diphenyl ethers (PBDEs) andhexabromocyclododecane (HBCD) were determined in fish(Salmo trutta forma lacustris) from Lake Geneva. Bromi-nated flame retardants were detected in all nine samples withan average concentration for the sum of BDE-28, BDE-47,BDE-49, BDE-66, BDE-99, BDE-100, BDE-119, BDE-153,BDE-154 and BDE-209 of 207 ng per g lipid weight(ng g lw-1). The congener patterns were dominated by BDE-47. The average concentration of HBCD was 168 ng g lw-1

Microplastiques : situation dans les eaux de surface en Suisse

La problématique des microplastiques fait l’objet d’un intérêt croissant, mais la situation dans les eaux douces reste peu connue. Les travaux présentés ici cherchent à combler cette lacune, et mieux comprendre l’étendue et les implications de cette pollution avec un premier état des lieux dans les eaux suisses

Entrevista com Luiz Felipe de Alencastro

Entrevista com Luiz Felipe de Alencastr

Univocidade do ser, singularidade e a gênese estática ontológica na “Crise nas infinitas terras”

Resumo: Este artigo busca, a partir da articulação do conceito de univocidade do ser e da noção de singularidade, a compreensão da gênese estática ontológica de Gilles Deleuze, considerando sua aplicação em um universo diegético de uma editora americana de histórias em quadrinhos, a DC Comics, no qual é enfatizada a simultaneidade de círculos de convergência que se transpassam. Sem mundos individuados e sem singularidades fixas organizadas em séries convergentes, temos um Flash e uma Mulher-Gato contingentes definidos por predicados, porém, não mais predicados analíticos de indivíduos determinados em um mundo que opera sua descrição, e, sim, por predicados sintéticos que lhes abrem diferentes mundos e individualidades.Palavras-chave: Ontologia; Deleuze; DC Comics

Indirect Evidence Link PCB Dehalogenation with Geobacteraceae in Anaerobic Sediment-Free Microcosms

Although polychlorinated biphenyls (PCBs) production was brought to a halt 30 years ago, recalcitrance to degradation makes them a major environmental pollutant at a global scale. Previous studies confirmed that organohalide-respiring bacteria (OHRB) were capable of utilizing chlorinated congeners as electron acceptor. OHRB belonging to the Phyla Chloroflexi and Firmicutes are nowadays considered as the main PCB-dechlorinating organisms. In this study, we aimed at exploring the involvement of other taxa in PCB dechlorination using sediment-free microcosms (SFMs) and the Delor PCB mixture. High rates of congener dehalogenation (up to 96%) were attained in long-term incubations of up to 692 days. Bacterial communities were dominated by Chloroflexi, Proteobacteria, and Firmicutes, among strictly simplified community structures composed of 12 major phyla only. In a first batch of SFMs, Dehalococcoides mccartyi closely affiliated with strains CG4 and CBDB1 was considered as the main actor associated with congener dehalogenation. Addition of 2-bromoethanesulfonate (BES), a known inhibitor ofmethanogenic activity in a second batch of SFMs had an adverse effect on the abundance of Dehalococcoides sp. Only two sequences affiliated to this Genus could be detected in two (out of six) BES-treated SFMs, contributing to a mere 0.04% of the communities. BES-treated SFMs showed very different community structures, especially in the contributions of organisms involved in fermentation and syntrophic activities. Indirect evidence provided by both statistical and phylogenetic analysis validated the implication of a new cluster of actors, distantly affiliated with the Family Geobacteraceae (Phylum d-Proteobacteria), in the dehalogenation of low chlorinated PCB congeners. Members of this Family are known already for their dehalogenation capacity of chlorinated solvents. As a result, the present study widens the knowledge for the phylogenetic reservoir of indigenous PCB dechlorinating taxa