Consulta: subjectFacets:"ASW"
Registros recuperados: 5
Data/hora: 09/06/2024 07:43:03

The effects of ionizing radiation, high energy electron beams, an depuration on shell stock oyster shelflife and Vibrio vulnificus content
Provedor de dados: 5
Autores: Dixon, D; Rodrick, G.
Total bacterial numbers were reduced three to four log cycles upon exposure of shell stock oysters to ionising radiation (60Co) at 1.0, 2.0 and 5.0 kiloGrays.Vibrio vulnificus was detected in the non-irradiated control shell stock oysters, however, it was not detected in any of the shell stock after 1.0, 2.0 and 5.0 kiloGrays of exposure. The shelflife of irradiated shell stock oysters and depurated oysters was also compared. Fifty percent of the irradiated oysters were dead within 12, 10 and 7 days at 1.0, 2.0 and 5.0 kiloGrays of exposure, respectively. In contrast, fifty percent of the depurated oysters were dead after 31 days. Cultures of virulent and avirulent Vibrio vulnificus in phosphate buffered saline were quite radiosensitive as no colony...
Tipo: Text
Palavras-chave: ASW; USA; Florida USA Coasts Vibrio vulnificus Crassostrea virginica Bivalvia Bacteria Marine molluscs Food technology Ionizing radiation Self purification Shellfish Oyster culture.
Ano: 1992
URL: http://archimer.ifremer.fr/doc/1992/acte-1620.pdf

Distribution growth temperatures, and gram reactions of psychrophilic sediment bacteria from tropical and subtropical regions of West-Africa.
Provedor de dados: 5
Autores: Ruger, H.
In depths &gt; 1,000 m viable counts of sediment bacteria from the continental slope off West-Africa were significantly higher after incubation of agar plates at 2 degree C than at 20 degree C. At a depth of 1,500 m in 17 degree N, for example, 438,000 cells/ml of wet sediment were found after incubation at 2 degree C, but at 20 degree C the counts were only 54,000 cells/ml. In the deep-sea of the eastern tropical Atlantic bacterial counts were low, between 70 and 14,000 cells/ml of wet sediment, and bout the same for both incubation temperatures. However, different types of bacteria were isolated, depending upon the incubation temperature applied. Most of the bacteria isolated from 20 degree C agar plates were Gram-positive and mesophilic. In contrast,...
Tipo: Text
Palavras-chave: ASW; Tropical Atlantic Bacteria Abyssal zone Pelagic sediments Deep water.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/acte-949.pdf

Nadia: Navette de diagraphie-etat de developpement present et evolution ulterieure
Provedor de dados: 5
Autores: Legrand, J; Bervas, J; Floury, L.
In July 1988, the first re-access to a deep sea borehole was performed using the logging shuttle NADIA 1 and the manned submersible NAUTILE during the cruise FARE. This operation was conducted on the site DSDP 396 B, drilled by the Glomar Challenger within the framework of the Deep Sea Drilling Project in 1976, close to the axis of the mid Atlantic Ridge at 23 degree N. A temperature logging hole and a fluid sampler was introduced in that hole and lowered to -300 m below the sea floor. It was the first time such an operation was done without a drill string and a drilling ship equipped with a dynamic positioning system. From this experience, a new logging shuttle, NADIA 2, was developed. NADIA 1 was designed with the objective of demonstrating the...
Tipo: Text
Palavras-chave: ASW; Mid Atlantic Ridge Logging Deep sea drilling Manned vehicles.
Ano: 1990
URL: http://archimer.ifremer.fr/doc/1990/acte-1151.pdf

The use of ozone to degrade Gymnodinium breve toxins
Provedor de dados: 5
Autores: Schneider, K; Rodrick, G.
Gymnodinium breve toxins were exposed to ozone treatment in both extracted form and in intact whole cells. Samples displayed a three log reduction in the total amount for toxin (PbTx-1, -2, -3, -5, -7 and -9) recovered after ten minutes as determined by HPLC analysis. Ozone effectively killed the red tide dinoflagellates when directly contacted ozone and when exposed in a pre-ozonated ASW environment. Both samples, when examined by light microscopy, displayed little difference between the direct and indirect ozone treatments. Reduction in toxin levels directly correlated with reduction of toxicity as observed using by a fish (prinodon variegatus) bioassay.
Tipo: Text
Palavras-chave: ASW; USA; Florida USA Coasts Cyprinodon variegatus Pisces Self purification Bioassays Ozonation.
Ano: 1992
URL: http://archimer.ifremer.fr/doc/1992/acte-1621.pdf

Estudio de la contaminación con hidrocarburos de un ecosistema de manglar en cayo Santa María, Jardines del Rey, Cuba
Provedor de dados: 20
Autores: Bermúdez Acosta, Jelvys; González Delgado, Alejandro; Castro Hernández, Yoelvis; Ortiz Guilarte, Eudalys; Núñez Moreira, Roberto; Oramas García, Julio; García García, Yaliany.
El propósito de esta investigación fue estudiar la contaminación de un ecosistema de manglar impactado con hidrocarburos en el sector centro sur de Cayo Santa María, Jardines del Rey, Cuba. Para el estudio de los indicadores microbiológicos y fisicoquímicos fue diseñado un muestreo estratificado, donde se seleccionaron dos estratos y diez estaciones de muestreo, considerando los patrones de flujos de marea en pleamar y bajamar, así como el impacto perceptible de la contaminación. La determinación de las poblaciones de microorganismos heterótrofos totales (BHT) y degradadores de petróleo (BDP) en agua y sedimentos se realizó por el método de conteo de colonias, expresadas como UFC·mL-1 o UFC· g-1 según la matriz de análisis. El contenido de hidrocarburos...
Tipo: Journal Contribution
Palavras-chave: ASW; Cuba; Degradation; Dispersion; Hydrocarbons; Microorganisms; Pollution.
Ano: 2014
URL: http://hdl.handle.net/1834/5912