Consulta: subjectFacets:"Crude oil"
Registros recuperados: 20
Data/hora: 08/06/2024 10:27:29

Extracción de hidrocarburos y compuestos derivados del petróleo en suelos agrícolas de la  cuenca baja del río Tonalá.
Provedor de dados: 32
Autores: 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....
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

Extracción de hidrocarburos y compuestos derivados del petróleo en suelos agrícolas de la  cuenca baja del río Tonalá.
Provedor de dados: 32
Autores: 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....
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

Première série de résultats sur la toxicité du pétrole brut de l'Amoco Cadiz
Provedor de dados: 5
Autores: Le Roux, S.; Lucas, A.
The effects of crude oil from Amoco Cadiz upon gametes larvae and ju­veniles of mussels Mytilus edulis are studied. They are compared with effects of Koweït crude (standard of the FPI). Toxical effects upon fécondation rate and embryonnary development are observed. Oxygen consumption and grazing rate vary also when mussels are treated with water soluble fraction of crude oil.
Tipo: Text
Palavras-chave: MytiLus; Pétrole brut; Toxicité; Consommation oxygène; Taux de fécondation; MytiLus; Crude oil; Toxicity; Oxygen consumption; Fecondation rate.
Ano: 1978
URL: http://archimer.ifremer.fr/doc/00306/41730/40941.pdf

Effects of petroleum biodegradation products on phytoplankton growth.
Provedor de dados: 5
Autores: 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

Onshore survey of macrobenthos along the Brittany coast following the Amoco Cadiz oil spill
Provedor de dados: 5
Autores: Hyland, Jeffrey L.
A preliminary ecological survey was conducted along the northern Brittany coast for the purpose of evaluating the initial impact of the Amoco Cadiz oil spill on intertidal macrofaunal communities. Specific objectives were to observe obviously oiled, dead, or moribund organisms on contaminated beaches, and to conduct a limited examination of the structure and composition of benthic communities considered at risk to impact. Results reflecting these objectives are discussed for a variety of habitats.
Tipo: Text
Palavras-chave: Amoco Cadiz; Pétrole brut; Étude écologique; Intertidal; Communautés macrofauniquëS; Impact de pétrole; Amoco Cadiz; Crude oil; Ecological survey; Intertidal; Macrofaunal communities; Oil impact.
Ano: 1978
URL: http://archimer.ifremer.fr/doc/00306/41727/40938.pdf

Variations metaboliques des communautes bacteriennes lors d'une pollution par petrole brut, avec ou sans traitement
Provedor de dados: 5
Autores: Cauchi, B.
Metabolic potentialities of bacterial communities in marine water after Crude Oil pollution (Arabian Light) and in marine water after pollution and treatment (enrichment: Inipol EAP 22) have been studied and compared. With data analysis: regressions, hierarchical ascending classification and multifactor correspondence analysis, the treatment gives rise to conservation and one increase of enzymatic pool (second day) of the bacterial sample as a combined metabolic homogeneity contrary to pollution impact. The direct assimilation of hydrocarbons looks more regular and slow without treatment.
Tipo: Text
Palavras-chave: Bacteria; Data processing; Pollution effects; Crude oil; Marine pollution; Physiology; Metabolism; Microbiology.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/acte-1023.pdf

Selección de bacterias con capacidad degradadora de hidrocarburos aisladas a partir de sedimentos del Caribe colombiano.
Provedor de dados: 20
Autores: Narváez-Florez, S.; Gómez, M.L.; Martínez, M.M.
A partir de sedimentos del Caribe colombiano se realizaron 31 aislamientos bacterianos en medio mínimo de sales suplementado con hidrocarburos (ACPM o petróleo crudo) como única fuente de carbono. Las cepas aisladas se sometieron a pruebas de selección en diferentes concentraciones de hidrocarburos y se escogieron once de ellas tolerantes al crudo y ACPM en un ámbito del 1-8% v/v. Posteriormente, con las cepas seleccionadas, se conformó un cultivo bacteriano mixto y se evaluó su capacidad de degradar hidrocarburos en un ensayo a escala de laboratorio, con una concentración del 2% v/v de ACPM en un periodo de 21 días. Mediciones de la biomasa en Unidades Formadoras de Colonias (UFC)/mL fueron empleadas para elaborar la curva de crecimiento del cultivo mixto...
Tipo: Journal Contribution
Palavras-chave: Biodegradation; Hydrocarbons; Bacteria; Crude oil; Biodegradation; Hydrocarbons; Bacteria; Crude oil; Http://aims.fao.org/aos/agrovoc/c_9261; Http://aims.fao.org/aos/agrovoc/c_3719; Http://aims.fao.org/aos/agrovoc/c_765; Http://aims.fao.org/aos/agrovoc/c_10178.
Ano: 2008
URL: http://hdl.handle.net/1834/3497

USING THE CRUDE OIL AND HEATING OIL MARKETS FOR DIESEL FUEL PURCHASING DECISIONS
Provedor de dados: 31
Autores: 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

The Relationship between Oil, Exchange Rates, and Commodity Prices
Provedor de dados: 31
Autores: 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

Assessing the impact of U.S. ethanol market shocks on global crude oil and U.S. gasoline: A structural VAR approach
Provedor de dados: 31
Autores: McPhail,   Lihong Lu.
Tipo: Conference Paper or Presentation
Palavras-chave: Structural VAR; Ethanol; Crude oil; Gasoline; Shocks; Agricultural and Food Policy; Environmental Economics and Policy; Q1; Q2; Q4.
Ano: 2010
URL: http://purl.umn.edu/61136

Interdependencies in the Energy-Bioenergy-Food Price Systems: A Cointegration Analysis
Provedor de dados: 31
Autores: 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

Spatial Marketing Patterns for Corn Under the Condition of Increasing Ethanol Production in the U.S.
Provedor de dados: 31
Autores: Conley,   Dennis M.; George,   Adam.
Events external to agriculture have set in motion the conditions for structural change in the marketing of corn in the U.S. These included a rapid increase in the price of crude oil from $40 per barrel to over $100 caused by hurricanes, geopolitical events, an increased global demand for energy from countries like China and India, and in December 2007, the U.S. raising the renewable fuel standards. The results of this research show that there could be significant changes in the historical utilization and marketing of corn in the U.S. The change in movement patterns provides one source of visible evidence that a structural change is underway.
Tipo: Journal Article
Palavras-chave: Ethanol; Corn; Spatial marketing; Structural change; Crude oil; Agricultural and Food Policy; Marketing; Resource /Energy Economics and Policy; Q10; Q13; Q27.
Ano: 2008
URL: http://purl.umn.edu/53726

INVESTIGATING RAPESEED PRICE VOLATILITIES IN THE COURSE OF THE FOOD CRISIS
Provedor de dados: 31
Autores: Busse,   Stefan; Brümmer,   Bernhard; Ihle,   Rico.
C2_3
Tipo: Conference Paper or Presentation
Palavras-chave: Multivariate GARCH; MATIF; Rapeseed; Crude oil; Volatilities; Food crisis; Demand and Price Analysis; Research Methods/ Statistical Methods; C32; E44; G1; Q11; Q13; Q49.
Ano: 2010
URL: http://purl.umn.edu/93957

What Drives Commodity Prices More: Oil Demand or Supply Shocks?
Provedor de dados: 31
Autores: Mutuc,   Maria Erlinda M.; Pan,   Suwen; Hudson,   Darren.
This paper shows that the response of agricultural commodity prices in the U.S. related to fluctuations in oil prices in the international market may differ greatly depending on whether the increase is driven by demand or supply shocks in the crude oil market. In the long-run, around 2-7 percent of the variability in grains, oilseeds, and cotton prices can be attributed to shocks to aggregate demand for industrial commodities while none can be traced to oil supply shocks.  This paper improves on the lack of economic structure in VAR models employed so far, and on the issue of short datasets, contributes to the nascent empirical evidence, and identifies the transmission of different types of oil price shocks to movements in agricultural prices in a SVAR...
Tipo: Conference Paper or Presentation
Palavras-chave: Cotton; Wheat; Corn; Soybeans; Crude oil; Oil price shocks; Demand shocks; Supply shocks; Structural vector autoregression (SVAR); Agricultural and Food Policy; Crop Production/Industries; Demand and Price Analysis; Q11; Q41.
Ano: 2010
URL: http://purl.umn.edu/61070

IMPACT OF CRUDE OIL ON FUNCTIONAL GROUPS OF CULTURABLE BACTERIA AND COLONIZATION OF SYMBIOTIC MICROORGANISMS IN THE Clitoria-Brachiaria RHIZOSPHERE GROWN IN MESOCOSMS
Provedor de dados: 37
Autores: 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

Production of CO2 in crude oil bioremediation in clay soil
Provedor de dados: 52
Autores: Baptista,Sandro José; Cammarota,Magali Christe; Freire,Denize Dias de Carvalho.
The aim of the present work was to evaluate the biodegradation of petroleum hydrocarbons in clay soil a 45-days experiment. The experiment was conducted using an aerobic fixed bed reactor, containing 300g of contaminated soil at room temperature with an air rate of 6 L/h. The growth medium was supplemented with 2.5% (w/w) (NH4)2SO4 and 0.035% (w/w) KH2PO4. Biodegradation of the crude oil in the contaminated clay soil was monitored by measuring CO2 production and removal of organic matter (OM), oil and grease (OandG), and total petroleum hydrocarbons (TPH), measured before and after the 45-days experiment, together with total heterotrophic and hydrocarbon-degrading bacterial count. The best removals of OM (50%), OandG (37%) and TPH (45%) were obtained in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biostimulation; Crude oil; Clay soil.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132005000400031

Factors influencing crude oil biodegradation by Yarrowia lipolytica
Provedor de dados: 52
Autores: 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

Microbial populations of crude oil spill polluted soils at the Jordan-Iraq desert (the Badia region)
Provedor de dados: 58
Autores: Saadoun,Ismail; Mohammad,Munir J.; Hameed,Khalid M.; Shawaqfah,Mo'ayyad.
Microbial populations' inhabitants in crude petroleum contaminated soils were analyzed in relation with the soil characteristics. A noticeable greater decline of bacterial counts and diversity but a prevalence of the genus Pseudomonas over the other identified genera in the fresh contaminated soils as compared to the old ones was observed.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bacteria; Crude oil; Fungi; Soil; Streptomycetes.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822008000300008

Characterization of dioxygenases and biosurfactants produced by crude oil degrading soil bacteria
Provedor de dados: 58
Autores: Muthukamalam,Santhakumar; Sivagangavathi,Sivalingam; Dhrishya,Dharmapal; Sudha Rani,Sadras.
ABSTRACT Role of microbes in bioremediation of oil spills has become inevitable owing to their eco friendly nature. This study focused on the isolation and characterization of bacterial strains with superior oil degrading potential from crude-oil contaminated soil. Three such bacterial strains were selected and subsequently identified by 16S rRNA gene sequence analysis as Corynebacterium aurimucosum, Acinetobacter baumannii and Microbacterium hydrocarbonoxydans respectively. The specific activity of catechol 1,2 dioxygenase (C12O) and catechol 2,3 dioxygenase (C23O) was determined in these three strains wherein the activity of C12O was more than that of C23O. Among the three strains, Microbacterium hydrocarbonoxydans exhibited superior crude oil degrading...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Crude oil; Biodegradation; Bacteria; Catechol dioxygenase; Biosurfactant.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822017000400637

Yield, yield features, phytochemical composition, antioxidant and antibacterial activities of Abutilon indicum cultivated under different fertilizers
Provedor de dados: 118
Autores: 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