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| Registros recuperados: 21 | |
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| Valencia, M.; Trejos de Suescum, R.. |
| El presente trabajo realiza un enfoque general acerca de la problemática de la contaminación marina por petróleo, el comportamiento de este contaminante en el mar, así como las fuentes más probables de contaminación por petróleo. Además se presenta un enfoque específico de la concentración y distribución de hidrocarburos del petróleo, disueltos y dispersos en aguas del mar, frente a las principales poblaciones costeras de las provincias del Guayas y el Oro, tomando en consideración dos muestreos, Diciembre de 1985 y Abril de 1986. Se concluye que, aún cuando no se han detectado concentraciones masivas de hidrocarburos disueltos y dispersos en las aguas estudiadas, sin embargo, la presencia del contaminante, en todas ellas, en mayor o menor grado, indica... |
| Tipo: Journal Contribution |
Palavras-chave: Marine pollution; Oil pollution. |
| Ano: 1986 |
URL: http://hdl.handle.net/1834/2117 |
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| Junín, M.; Castello, H.; Hollmann, P.. |
| La ciudad de Mar de Plata en la provincia de Buenos Aires, es el Puerto pesquero más importante de la Argentina, desde el cual operan mas de 400 naves. Para entrar al puerto todas las naves pasan frente a una colonia de lobo marino de un pelo oataria flavescens establecida en uno de los márgenes de la escollera Sur dentro del puerto. Esta colonia está protegida del contacto con el público por un vallado de alambre tejido. Esta compuesta exclusivamente por machos, que descansan durante el invierno. Durante el período reproductor los animales se desplazan hacia las colonias reproductivas, retornando a la lobería a fin del verano. Un alto porcentaje de los animales mostró alteraciones de piel y mucosas al examen visual, con pérdida de pelo abarcando una... |
| Tipo: Journal Contribution |
Palavras-chave: Marine pollution; Petroleum hydrocarbons; Marine mammals; Oil pollution; Fishing harbours. |
| Ano: 1998 |
URL: http://hdl.handle.net/1834/2261 |
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| Goutx, H; Berland, B; Leveau, M; Bertrand, J. |
| The effects of products resulting from petroleum biodegradation in continuous culture, have been studied on the growth of two marine algae. Sugars, lipids and amino acids are the main components resulting from petroleum degradation in the bacteria used medium. Their concentrations are respectively 600 mg.l super(-1), 46 mg.l super(-1) and 74.2 mu M.l super(-1). The algae growth is inhibited when products are enough concentrated; it is stimulated by low concentration. Among these products, lipids are more toxic than others. The two species show different sensitivity towards the used medium. Prorocentrum micans growth is more inhibited than that of Phaeodactylum tricornutum . |
| Tipo: Text |
Palavras-chave: Bacteria; Phytoplankton; Toxicity; Oil pollution; Crude oil; Biodegradation. |
| Ano: 1984 |
URL: http://archimer.ifremer.fr/doc/1984/acte-1017.pdf |
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| Aissa, P.; Soltani, A.; Mahmoudi, E.; Louati, H.; Beyrem, H.. |
| Une étude microcosmique a été effectuée pour examiner l’influence d’un lubrifiant minéral avant et après son utilisation dans un moteur de véhicule sur la structure trophique de la communauté de nématodes libres originaire de la lagune de Ghar El Melh. Une concentration de 1mg kg-1 de sédiment a été testée pour évaluer l’effet du polluant après 40 jours d’exposition. Les résultats de l’étude ont révélé que les consommateurs non sélectifs (1B), les plus abondants dans le microcosme témoin, ont été très affectés et leur dominance a diminué significativement sous l’effet de la contamination par le lubrifiant minéral avant ou après usage. Les détritivores sélectifs (1A) dont la dominance augmente significativement au iveau des microcosmes traités avec le... |
| Tipo: Journal Contribution |
Palavras-chave: Microcosms; Oil pollution; Petroleum; Pollution effects; Sediments; Trophic structure. |
| Ano: 2008 |
URL: http://hdl.handle.net/1834/4255 |
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| Ardhuin, Fanny; Mercier, G; Collard, F; Garello, R. |
| A methodology is proposed for the semiautomatic detection, characterization, and classification of slicks detected in C-band Synthetic Aperture Radar (SAR). For the first detection step, automatic algorithms were tested on Environmental Research Satellite (ERS) and Environmental Satellite (EnviSat) images acquired during the Prestige tanker accident. These tests reveal that simple filter or segmentation methods efficiently detect slicks with high contrasts and simple shapes, while a new and more complex multiscale method is able to detect a wider range of slicks. The characteristics of automatically detected slicks are then combined with meteooceanic data in order to eliminate slicks related to wind anomalies and current fronts. The data suggest that... |
| Tipo: Text |
Palavras-chave: Synthetic aperture radar SAR; Satellite measurement; Oil pollution; Image analysis. |
| Ano: 2005 |
URL: http://archimer.ifremer.fr/doc/2005/publication-1132.pdf |
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| Oyewo, E.O.. |
| Laboratory-scale studies on the initial weathering of some oils on water by evaporative loss and dissolution have been carried out. Evaporation rate was dependent on the type of oil and was accelerated by increased temperature, number retarded evaporation rate. The order of evaporation rate was Gas Oil >Diesel Oil > Medium fuel Oil. Dissolution rate, which varied with the type of oil, was retarded by salinity but promoted by increased temperature. With the mono-component oils tested, the cyclic, aromatic and iso-characters increased dissolution rate. The order of dissolution rate for the commercial oils was Gas Oil Diesel Oil > Medium Fuel Oil. |
| Tipo: Report |
Palavras-chave: Oil pollution; Water pollution; Water pollution; Http://aims.fao.org/aos/agrovoc/c_8321. |
| Ano: 1988 |
URL: http://hdl.handle.net/1834/2445 |
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| Wergeland, Morten; Kudryavtsev, Vladimir; Chapron, Bertrand; Brekke, Camilla; Johannessen, Johnny A.. |
| Radarsat-2 C-band quad-polarization SAR observations of crude oil, emulsion, and plant oil slicks acquired in the wind speed range from 4 to 8 m/s and incidence angles from 30 degrees to 50 degrees are analyzed to yield new insights into the attenuation of short waves and breaking waves by surface slicks in real conditions. To provide a direct quantitative assessment of the surface wave damping, the measurements are decomposed into polarization difference (PD), polarization ratio (PR), nonpolarized (NP), and cross-polarized (CP) components. The PD signals relate to the extent of Bragg damping in the slick areas, over which the PR is systematically higher than over the ambient sea surface. Attenuation of the breaking waves is revealed to affect both the CP... |
| Tipo: Text |
Palavras-chave: Oil pollution; Radar imaging; Sea surface; Surface waves. |
| Ano: 2016 |
URL: https://archimer.ifremer.fr/doc/00363/47460/47484.pdf |
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| Registros recuperados: 21 | |
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