Abstract:No Brasil, o fenômeno da pobreza foi interpretado, mais das vezes, a partir da sua relação com o mercado de trabalho, com a escassez da proteção social e com o processo de expansão do assalariamento. Por outro lado, os estudos sobre estrutura ocupacional raras vezes adotam a pobreza como fenômeno a ser analisado, relegando-a a um mero subproduto das dinâmicas da estratificação social. Esta pesquisa pretende mostrar como podemos incorporar a estrutura ocupacional, a partir da sua relação com as mudanças econômi… Show more
“…Besides being the only species of the genus, it is one of the largest members in the family, reaching 1.5 meters in length ( Turner, 1966 ). In the northern coast of Brazil, this shipworm is locally known as “Turu” and it is popularly used for the treatment of certain infectious diseases, as well as for enhancing food supplements ( Andrade, 1979 ). Other marine invertebrates are the source of bioactive compounds, which in many cases were found to be produced by associated bacteria ( Piel, 2004 ).…”
Nutrition in the Teredinidae family of wood-boring mollusks is sustained by cellulolytic/nitrogen fixing symbiotic bacteria of the Teredinibacter clade. The mangrove Teredinidae Neoteredo reynei is popularly used in the treatment of infectious diseases in the north of Brazil. In the present work, the symbionts of N. reynei, which are strictly confined to the host's gills, were conclusively identified as Teredinibacter turnerae. Symbiont variants obtained in vitro were able to grow using casein as the sole carbon/nitrogen source and under reduced concentrations of NaCl. Furthermore, cellulose consumption in T. turnerae was clearly reduced under low salt concentrations. As a point of interest, we hereby report first hand that T. turnerae in fact exerts antibiotic activity. Furthermore, this activity was also affected by NaCl concentration. Finally, T. turnerae was able to inhibit the growth of Gram-negative and Gram-positive bacteria, this including strains of Sphingomonas sp., Stenotrophomonas maltophilia, Bacillus cereus and Staphylococcus sciuri. Our findings introduce new points of view on the ecology of T. turnerae, and suggest new biotechnological applications for this marine bacterium.
“…Besides being the only species of the genus, it is one of the largest members in the family, reaching 1.5 meters in length ( Turner, 1966 ). In the northern coast of Brazil, this shipworm is locally known as “Turu” and it is popularly used for the treatment of certain infectious diseases, as well as for enhancing food supplements ( Andrade, 1979 ). Other marine invertebrates are the source of bioactive compounds, which in many cases were found to be produced by associated bacteria ( Piel, 2004 ).…”
Nutrition in the Teredinidae family of wood-boring mollusks is sustained by cellulolytic/nitrogen fixing symbiotic bacteria of the Teredinibacter clade. The mangrove Teredinidae Neoteredo reynei is popularly used in the treatment of infectious diseases in the north of Brazil. In the present work, the symbionts of N. reynei, which are strictly confined to the host's gills, were conclusively identified as Teredinibacter turnerae. Symbiont variants obtained in vitro were able to grow using casein as the sole carbon/nitrogen source and under reduced concentrations of NaCl. Furthermore, cellulose consumption in T. turnerae was clearly reduced under low salt concentrations. As a point of interest, we hereby report first hand that T. turnerae in fact exerts antibiotic activity. Furthermore, this activity was also affected by NaCl concentration. Finally, T. turnerae was able to inhibit the growth of Gram-negative and Gram-positive bacteria, this including strains of Sphingomonas sp., Stenotrophomonas maltophilia, Bacillus cereus and Staphylococcus sciuri. Our findings introduce new points of view on the ecology of T. turnerae, and suggest new biotechnological applications for this marine bacterium.
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