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| Registros recuperados: 35 | |
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| Mejanelle, Laurence; Riviere, Beatrice; Pinturier, Laurence; Khripounoff, Alexis; Baudin, Francois; Dachs, Jordi. |
| Hydrocarbons were analyzed in sediments from the Congo River deep-sea fan, from the Congo River, and in sinking particles collected by sediment traps 40 m above the sediment. Studied sites encompassed three lobes of decreasing age of formation along the canyon: sites A, F and C and a another lobe system, disconnected from the active channel since 4 ka, Site E. Terrestrial long-chain odd n-alkanes were dominant in all sediments of the lobe system. Unsaturated terpenoids sourced by higher plants, such as gammacerene, lupene, ursene and oleanene, were also detected. At site C, characterized by high accumulation rates (10–20 cm yr−1), the organic matter spends less time in the oxic layer than at other sites and high phytadiene concentrations (10 to 17 μg... |
| Tipo: Text |
Palavras-chave: Congo fan; Hydrocarbons; NAH; Hopanes; Hopenes; Sediments; Turbidite system. |
| Ano: 2017 |
URL: http://archimer.ifremer.fr/doc/00388/49902/50472.pdf |
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| Oliveira,Dimas Estrasulas de; Silva,Sila Carneiro da. |
| Knowledge of information relative to the digestibility, intake and botanical and morphological composition of the diet is important in nutritional studies, since it provides the basis for understanding aspects related to the ingestive behavior and selectivity of animals. N-alkanes have been used successfully as markers in studies with many species of animals, particularly domesticated ruminants, most of the times as replacements for conventional markers as chromium oxide for example. However, for wild ruminants and non-ruminant animals information on this technique is still scarce and, as a consequence, its potential for use unknown. This review reports the use of this technique in studies of feed digestibility, intake and diet composition with wild... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Digestibility; Diet composition; Feed intake; Forages; Hydrocarbons. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162007000600015 |
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| Zheng, Zhou; Jin, Qing; Miao, Jinlai; Liu, Fangming. |
| Two hydrocarbon degrading bacteria NJ276 and NJ341 were screened from 385 Antarctic marine bacteria and their degrading characteristics were studied. Diesel oil as sole carbon source was used in this study. The results showed that the oil degradation rates of Antarctic psychrophile bacteria NJ276 and NJ341 were 23.47 % and 32.15 %, respectively, after 20 days culturation at 5 °C, and the rates were 43.95 % and 62.47 % respectively after 20 days culturation at 15 °C. The oil degradation abilities were enhanced remarkably with the increasing culture temperature. GC - MSs indicated the residual oil contained C15 - C21 7 alkyls after degradation by NJ276, and C16, C17 and C18 3 alkyls after degradation by NJ341. The 16S rDNA gene sequences homology and... |
| Tipo: Journal Contribution |
Palavras-chave: Hydrocarbons; Degradation; Bacteria. |
| Ano: 2008 |
URL: http://hdl.handle.net/1834/5879 |
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| Oliveira,Dimas Estrasulas de; Tedeschi,Luis Orlindo. |
| Saturated aliphatic hydrocarbons (n-alkanes) were extracted from feed, orts, and bovine fecal samples using disposable, plastic 5mL-syringes as an alternative material to disposable columns, which are normally used in the liquid-solid extraction phase of n-alkanes. For both methods, the n-alkane extracts (carbon chain length between 31 and 36 atoms) were identified using gas chromatography. The linear regression between methods were: 1) feces: column Alkane=2.63+0.92×syringeAlkane [r²=0.94, square root of the mean square error (RMSE)=13.7mg kg-1, n=30] from which the intercept and the slope did not simultaneously differ from zero and unity (P>0.05), respectively; 2) feeds: column Alkane=0.36+1.12×syringeAlkane (r²=0.85, RMSE=1.9mg kg-1, n=21) from which... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Analysis; Digestibility; Intake; Hydrocarbons; N-alkane determination. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782010000800029 |
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| Vázquez Luna, Dinora. |
| En México, el desarrollo basado en la industria petrolera ha afectado los suelos y recursos naturales del sureste del país; sin embargo, no hay estudios que vinculen sus efectos sobre el desarrollo equitativo de los habitantes en zonas contaminadas. Por ello, el objetivo del trabajo fue analizar desde la perspectiva de género, los efectos sociales sobre el desarrollo equitativo de las familias, en cuatro zonas de los ejidos de Humanguillo, Tabasco (Rovirosa, El Paraíso, La Ceiba y Gurría), que se ubican a una distancia de 0.5, 2.5, 7 y 12 kilómetros al sur la petroquímica La Venta. Se realizaron encuestas con enfoque de género y de salud, donde las unidades de análisis fueron las familias. Se realizaron análisis de suelos para determinar los efectos de la... |
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Palavras-chave: Género; Asma; Contaminación ambiental; Hidrocarburos; Alergias; Gender; Asthma; Environmental pollution; Hydrocarbons; Allergies; Doctorado; Desarrollo Rural. |
| Ano: 2011 |
URL: http://hdl.handle.net/10521/422 |
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| Vázquez Luna, Dinora. |
| En México, el desarrollo basado en la industria petrolera ha afectado los suelos y recursos naturales del sureste del país; sin embargo, no hay estudios que vinculen sus efectos sobre el desarrollo equitativo de los habitantes en zonas contaminadas. Por ello, el objetivo del trabajo fue analizar desde la perspectiva de género, los efectos sociales sobre el desarrollo equitativo de las familias, en cuatro zonas de los ejidos de Humanguillo, Tabasco (Rovirosa, El Paraíso, La Ceiba y Gurría), que se ubican a una distancia de 0.5, 2.5, 7 y 12 kilómetros al sur la petroquímica La Venta. Se realizaron encuestas con enfoque de género y de salud, donde las unidades de análisis fueron las familias. Se realizaron análisis de suelos para determinar los efectos de la... |
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Palavras-chave: Género; Asma; Contaminación ambiental; Hidrocarburos; Alergias; Gender; Asthma; Environmental pollution; Hydrocarbons; Allergies; Doctorado; Desarrollo Rural. |
| Ano: 2011 |
URL: http://hdl.handle.net/10521/422 |
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| Marchand, Michel; Roucache, J. |
| In October 16, 1976, the tanker "Bohlen" was wrecked in the Mer d'Iroise, at about 35 miles of Brest, and lossed about 7 000 t of Boscan crude oil. The coast of Brittany was polluted by 3 000 t, and 4000 t were dispersed in the marine environment. In July 1977, 23 surface sediment samples were collected to look for the traces of oil spill in the sea bottom, 9 months after the shipwreck. Only one sediment was very iittle polluted by the Boscan crude oil. Elsewhere, two other kinds of oil pollution were observed in sorne sediment samples. Severa! quantitative and qualitative criteria were used to research sorne oil pollution in the marine sediments and to know the origin: hydrocarbon concentrations, ratios total organic extra ct 1 organic carbon,... |
| Tipo: Text |
Palavras-chave: Pollution; Hydrocarbures; Sédiments; « Bohlen »; Pollution; Hydrocarbons; Sediments; "Bohlen". |
| Ano: 1981 |
URL: http://archimer.ifremer.fr/doc/00121/23206/21051.pdf |
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| Essid, N.; Mahmoudi, E.; Beyrem, H.; Aissa, P.; Hedfi, A.. |
| The survey of sediment and hydrological parameters in the old harbor of Bizerte has revealed that this ecosystem knows a high anthropogenic pressure. In this area waters were characterized by weak contents in dissolved oxygen and sediments, rich in fine fraction, were loaded in hydrocarbons and in organic matter. The free-living nematodes, predominant taxa, responded to these disturbances by a significant decrease in their densities and their biomasses and had tendency, notably at the most isolated sites, to penetrate deeply to escape surface sediments highly loaded in hydrocarbons and in organic matter. |
| Tipo: Journal Contribution |
Palavras-chave: Hydrocarbons; Pollution effects; Pollution indicators; Meiobenthos; Harbours; Man-induced effects; Bioindicators; Hydrocarbons; Http://aims.fao.org/aos/agrovoc/c_3719. |
| Ano: 2003 |
URL: http://hdl.handle.net/1834/1115 |
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| Ramírez May, Ana Guadalupe. |
| El objetivo de esta investigación fue evaluar el efecto de los hidrocarburos totales del petróleo intemperizado (HTPI) al final de dos estados del crecimiento vegetal, en la densidad de bacterias fijadoras de N de vida libre (BFN) en suelo-rizosfera, de asociación simbiótica (Rhizobium) en nódulos y la actividad enzimática de la ureasa en suelo plantado con Vigna unguiculata, para obtener indicadores biológicos de toxicidad. Se utilizaron dos Gleysoles del estado de Tabasco, México. Gleysol 1 (sitio 1) ubicado a 2 Km al sureste del Complejo Procesador de Gas La Venta, en el ejido José Narciso Rovirosa, Huimanguillo, se colectaron en nueve puntos suelos con diferentes contenidos de HTPI (5 822, 6 536, 13 803, 14 431, 15 923, 23 313, 25 517, 28 465, 50 297... |
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Palavras-chave: Bacterias; Nódulos; Hidrocarburos; Toxicidad; Bacteria; Nodules; Hydrocarbons; Toxicity; Producción Agroalimentaria en el Trópico; Maestría. |
| Ano: 2012 |
URL: http://hdl.handle.net/10521/716 |
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| Valencia T., M.. |
| Durante los veranos australes de 1995-1996 y 1997-1998 se llevó a cabo, en Ensenada Guayaquil, cuerpo de agua aledaño a Punta Fort William, Isla Greenwich, del archipiélago de las Shetland del Sur, lugar del asentamiento de la Estación Científica "Pedro Vicente Maldonado", estudios químicos de la calidad de las aguas tendientes a determinar el eventual impacto que las actividades humanas pudieran ocasionar sobre tal ecosistema. Se presenta información acerca de las condiciones de oxigenación de las aguas, temperatura y salinidad de las mismas, la capacidad nutricia en relación con la concentración de micronutrientes inorgánicos así como información acerca de la presencia de hidrocarburos del petróleo disueltos y dispersos y, para establecer la efectividad... |
| Tipo: Journal Contribution |
Palavras-chave: Environmental impact; Water quality; Hydrocarbons; Waste water; Dissolved oxygen; Chemical analysis; Environmental impact; Water quality; Waste water; Dissolved oxygen; Hydrocarbons; Http://aims.fao.org/aos/agrovoc/c_24420; Http://aims.fao.org/aos/agrovoc/c_16061; Http://aims.fao.org/aos/agrovoc/c_24927; Http://aims.fao.org/aos/agrovoc/c_36106; Http://aims.fao.org/aos/agrovoc/c_3719. |
| Ano: 1998 |
URL: http://hdl.handle.net/1834/3850 |
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| 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 |
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| Registros recuperados: 35 | |
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