787 resultados para Esclavos negros


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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Black fungi are able to adapt to extreme environmental conditions, such as: high temperatures, the presence of toxic chemical substances and lack of nutrients. Besides, they are also potential pathogens to humans. The natural environment of many black fungi is still unknown and some studies are being conducted to evaluate the biodiversity of this group and their different habitats. This study aimed to isolate black fungi in domestic environments and facilities, such as toothbrushes, fridge sealing rubbers, bathroom strainers and divisions, windows, wall tiles and bath sponge. For the collection, material surfaces were scratched with a scalpel and the resulting fragments were sewed in Mycosel agar (DifcoTM), supplemented with actidione to inhibit the growth of highly-sporulating fungi. Plates were incubated at 25ºC for three weeks. The 46 isolated fungi were maintained on MA2% slants at 8ºC and cryopreserved at -80ºC. Fungal identification was performed through the analysis of macro and microscopic features and ITS rDNA sequencing. The following black fungi taxa were found: Ascomycota sp., Cladosporium spp., Dothideomycete sp., Exophiala alcalophila, Ochroconis mirabilis and Rhinocladiella atrovirens. Non-melanized fungi were also found, such as Geosmithia sp., Penicillium sp. and Rhodotorula mucilaginosa. The temperature tests showed that isolated black fungi were not able to grow at 37°C, however, this temperature proved to be fungistatic to 43% of them. According to literature, all black fungi isolated in this study are opportunistic pathogens and additional studies are necessary to evaluate the risk that these micro-organisms offer to health, once they were isolated from domestic environments

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Black fungi are able to adapt to extreme environmental conditions, such as: high temperatures, the presence of toxic chemical substances and lack of nutrients. Besides, they are also potential pathogens to humans. The natural environment of many black fungi is still unknown and some studies are being conducted to evaluate the biodiversity of this group and their different habitats. This study aimed to isolate black fungi in domestic environments and facilities, such as toothbrushes, fridge sealing rubbers, bathroom strainers and divisions, windows, wall tiles and bath sponge. For the collection, material surfaces were scratched with a scalpel and the resulting fragments were sewed in Mycosel agar (DifcoTM), supplemented with actidione to inhibit the growth of highly-sporulating fungi. Plates were incubated at 25ºC for three weeks. The 46 isolated fungi were maintained on MA2% slants at 8ºC and cryopreserved at -80ºC. Fungal identification was performed through the analysis of macro and microscopic features and ITS rDNA sequencing. The following black fungi taxa were found: Ascomycota sp., Cladosporium spp., Dothideomycete sp., Exophiala alcalophila, Ochroconis mirabilis and Rhinocladiella atrovirens. Non-melanized fungi were also found, such as Geosmithia sp., Penicillium sp. and Rhodotorula mucilaginosa. The temperature tests showed that isolated black fungi were not able to grow at 37°C, however, this temperature proved to be fungistatic to 43% of them. According to literature, all black fungi isolated in this study are opportunistic pathogens and additional studies are necessary to evaluate the risk that these micro-organisms offer to health, once they were isolated from domestic environments

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[ES] Se aportan nuevos datos para conocer el movimiento de personas y productos que se produjo en Santa Cruz de Tenerife en el siglo XVIII, utilizando como fuente las evidencias arqueológicas y antropológicas procedentes de las excavaciones realizadas en la Iglesia de La Concepción. Los análisis de ADNmt de la población adulta han demostrado la diversidad de la población asentada en la ciudad, destacando el alto porcentaje de linajes subsaharianos. En la muestra infantil estudiada (21 falanges) se identificaron mayoritariamente linajes europeos. Los 6 fragmentos analizados de pipas de fumar de origen holandés presentaron una composición compatible con la pirofilita.

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Rafael Azcona como un escritor en imágenes. Contrafiguras de la España oficial durante el franquismo. Ecos de una identidad milenaria.

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El presente trabajo se inscribe en el campo de la historia de las ideas; es de carácter interpretativo y tiene por objetivo platear algunas de las contradicciones teóricas presentes en los primeros textos del antropólogo y ensayista cubano Fernando Ortiz, específicamente en Los negros brujos (1906) y Los negros esclavos (1916), para luego establecer una comparación con un texto de madurez del autor como el Contrapunteo cubano del tabaco y el azúcar (1940). La hipótesis fundamental es que esas contradicciones teóricas no resueltas irán transformándose a lo largo de su obra, y desembocarán en la ampliación de la perspectiva intelectual del Fernando Ortiz de los años treinta y cuarenta. Este trabajo es un aporte a la reflexión y problematización de un período de la obra del intelectual cubano que aún hoy sigue siendo objeto de debates

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El presente trabajo se basa en la lectura y análisis de testamentos otorgados por la "gente de color" que habitaba la ciudad de Buenos Aires hacia fines de la época colonial y principios del lapso independiente; esta eficaz fuente, no siempre tenida en cuenta por los investigadores de la institución esclavista, nos ilustra sobre una variedad de aspectos (socio-económicos, demográficos, culturales, religiosos) atinentes al grupo, al punto de convertirse en un venero sumamente fecundo para intentar estudios como el que nos ocupa. A través del mismo se verá que los testadores morenos y pardos, aunque numéricamente representan sólo una parte de la comunidad afroporteña, son aquellos que lograron una mejor adaptación a la sociedad en la cual estaban inmersos, aunque tibiamente integrados, admitiendo sin renuencias las pautas culturales que la misma determinaba.