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| Registros recuperados: 20 | |
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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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| Pons Jiménez, Mirna. |
| El análisis de hidrocarburos en muestras de suelos, es una de las determinaciones más frecuentes en los estudios ambientales, de las zonas productoras de petróleo crudo. Una de las técnicas más utilizadas en el análisis de hidrocarburos de la fracción pesada del petróleo en suelos, es el método establecido en la Norma Oficial Mexicana NMX-AA-134-scfi-2006. Sin embargo, en el método se indica un mismo tiempo de extracción sin considerar las diferencias en las propiedades físicas y químicas del suelo. Por lo anterior, en este trabajo, se planteó optimizar el tiempo de extracción de compuestos derivados del petróleo mediante un sistema Soxhlet, en tres suelos con diferentes características físicas y químicas, empleando tres disolventes de polaridad diferente.... |
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Palavras-chave: Análisis químico; Suelo; Contaminación; Petróleo crudo; Chemical analysis; Soil; Contamination; Crude oil; Maestría; Producción agroalimentaria en el trópico. |
| Ano: 2010 |
URL: http://hdl.handle.net/10521/78 |
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| Pons Jiménez, Mirna. |
| El análisis de hidrocarburos en muestras de suelos, es una de las determinaciones más frecuentes en los estudios ambientales, de las zonas productoras de petróleo crudo. Una de las técnicas más utilizadas en el análisis de hidrocarburos de la fracción pesada del petróleo en suelos, es el método establecido en la Norma Oficial Mexicana NMX-AA-134-scfi-2006. Sin embargo, en el método se indica un mismo tiempo de extracción sin considerar las diferencias en las propiedades físicas y químicas del suelo. Por lo anterior, en este trabajo, se planteó optimizar el tiempo de extracción de compuestos derivados del petróleo mediante un sistema Soxhlet, en tres suelos con diferentes características físicas y químicas, empleando tres disolventes de polaridad diferente.... |
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Palavras-chave: Análisis químico; Suelo; Contaminación; Petróleo crudo; Chemical analysis; Soil; Contamination; Crude oil; Maestría; Producción agroalimentaria en el trópico. |
| Ano: 2010 |
URL: http://hdl.handle.net/10521/78 |
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| Ferreira,Tatiana Felix; Coelho,Maria Alice Zarur; Rocha-Leão,Maria Helena Miguez da. |
| Yarrowia lipolytica is unique strictly aerobic yeast with the ability to efficiently degrade hydrophobic substrates such as n-alkenes, fatty acids, glycerol and oils. In the present work, a 2(4) full factorial design was used to investigate the influence of the independent variables of temperature, agitation, initial cell concentration and initial petroleum concentration on crude oil biodegradation. The results showed that all variables studied had significant effects on the biodegradation process. Temperature, agitation speed and initial cell concentration had positive effects, and initial petroleum concentration had a negative effect. Among the crude oil removal conditions studied, the best temperature and agitation conditions were 28ºC and 250 rpm,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Yarrowia lipolytica; Crude oil; Biodegradation. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132012000500019 |
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| ALARCÓN,Alejandro; GARCÍA-DÍAZ,Mariano; HERNÁNDEZ-CUEVAS,Laura Verónica; ESQUIVEL-COTE,Rosalba; FERRERA-CERRATO,Ronald; ALMARAZ-SUAREZ,Juan José; FERRERA-RODRÍGUEZ,Ofelia. |
| ABSTRACT This research evaluated the changes on populations of culturable N-fixing free bacteria (NFFB) and P-solubilizing bacteria (PSB), as well as on the root nodulation by native rhizobia, the root colonization and spore number of arbuscular mycorrhizal fungi (AMF), in the rhizosphere of Clitoria ternatea and Brachiaria brizantha grown in mesocosms contaminated with crude oil (0, 3000, 6000, 9000, and 12000 mg kg-1), for 240 days. After 24 h of soil contamination, the highest populations of NFFB and PSB (5.5 and 4.9 LogUFC, respectively) were found in control, and the lowest populations were obtained at 12000 mg kg-1 (5.1 and 4.2 LogUFC, respectively). In contrast, at 60 and 240 days, the control showed lower populations of NFFB and PSB (5.4 and 4.8... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Arbuscular mycorrhizal fungi; Crude oil; N-fixing free bacteria; P-solubilizing bacteria; Root nodulation; Soil contamination. |
| Ano: 2019 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2019000200343 |
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| Ciaian, Pavel; Kancs, d'Artis. |
| The present paper examines a long-run relationship between the energy, bioenergy and food prices. In the recent years the bioenergy production has increased significantly around the world. The increase has been driven by rising energy prices as well as by environmental policies aiming at reducing the harmful effects of conventional sources of energy, such as climate change. Bioenergy, in turn, affects agricultural markets, because it uses agricultural commodities as inputs. The theoretical model we develop predicts that, because of price inelastic food demand, the agricultural price increase may be substantial. The empirical findings confirm the theoretical hypothesis that energy prices do affect prices of agricultural commodities. However, the... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Energy; Bioenergy; Crude oil; Renewable fuel; Cointegration; Agricultural and Food Policy; Demand and Price Analysis; International Development; Resource /Energy Economics and Policy; C14; C22; C51; Q11; Q13; Q42. |
| Ano: 2010 |
URL: http://purl.umn.edu/61009 |
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| Harri, Ardian; Nalley, Lawton Lanier; Hudson, Darren. |
| Exchange rates have long been thought to have an important impact on the export and import of goods and services, and, thus, exchange rates are expected to influence the price of those products that are traded. At the same time, energy impacts commodity production in some very important ways. The use of chemical and petroleum derived inputs has increased in agriculture over time; the prices of these critical inputs, then, would be expected to alter supply, and, therefore, the prices of commodities using these inputs. Also, agricultural commodities have been increasingly used to produce energy, thereby leading to an expectation of a linkage between energy and commodity markets. In this paper, we examine the price relationship through time of the primary... |
| Tipo: Journal Article |
Palavras-chave: Cointegration; Commodity prices; Crude oil; Exchange rates; Agribusiness; Consumer/Household Economics; International Relations/Trade; Marketing; Production Economics; Resource /Energy Economics and Policy; C32; L71; Q11; Q40. |
| Ano: 2009 |
URL: http://purl.umn.edu/53095 |
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| Dhuyvetter, Kevin C.; Dean, Erik; Parcell, Joseph L.. |
| Agricultural producers and input suppliers must regularly make decisions based on forecasts; however, most publicly available forecasts are for outputs. Research has shown the importance of being a low-cost operator. Thus, focusing on inputs may be beneficial. The objective of this research was to estimate models based on futures markets to forecast diesel fuel prices. Results suggest diesel fuel prices forecasted using the crude oil or heating oil futures market are reasonably accurate, and that this approach is superior to using a historical average. Based on out-of-sample price predictions, producers could profitably use crude oil futures-based models to make diesel fuel purchasing decisions. While the gains from following a model-based decision rule... |
| Tipo: Journal Article |
Palavras-chave: Crude oil; Diesel fuel; Forecasts; Forward contracting; Heating oil; Resource /Energy Economics and Policy. |
| Ano: 2003 |
URL: http://purl.umn.edu/14664 |
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| Yaldiz,Gulsum; Yildirim,Arzu Birinci; Arici,Yeliz Kasko; Camlica,Mahmut. |
| G. Yaldiz, A. B. Yildirim, Y. K. Arici, and M. Camlica. 2016. Yield, yield features, phytochemical composition, antioxidant and antibacterial activities of Abutilon indicum cultivated under different fertilizers. Cien. Inv. Agr. 43(3):464-475. Abutilon indicum (Link) Sweet is an important medicinal plant that has been used in traditional medicine for centuries, and it is one ofthe novel crops being used in the pharmaceutical industry. Agricultural practices that produce high drug yield and desired secondary metabolites are in high demand by pharmaceutical-related industries; therefore, the aim of this study was to determine the leaf and seed yield, crude oil yield, crude oil composition, total phenolic content, and the antioxidant and antibacterial... |
| Tipo: Journal article |
Palavras-chave: Biological activity; CAN; Crude oil; Fertilizer; NPK; Yield; Aceite crudo; Actividad biológica; CAN; Fertilizante; NPK; Rendimiento. |
| Ano: 2016 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202016000300012 |
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| Registros recuperados: 20 | |
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