Hydrocarbon Fractions
Mostrando 13-24 de 38 artigos, teses e dissertações.
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13. Estudo geoquimico de oleos do Campo de Marlim, Bacia de Campos, sintese de biomarcadores esteranos aromaticos
This thesis presents the geochemical study of three oil samples: PCM1, PCM2 e PCM3, all pertaining to the Marlin Field located in the Campos Basin, Rio de Janeiro and were generated by saline lacustrine source rocks. The crude oils were studied by the gas chromatography coupled whith mass spectrometry (GC/MS technique), and standards were used in this resear
Publicado em: 2003
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14. Detalhes da historia geologica de Campo de Albacora - Bacia de Campos a partir de biomarcadores acidos
The GC/MS biomarker analyses of eight oils from Albacora Field - Campos Basin(RJ), revealed that the acidic fossil molecules are sensitive to geological phenomena connected with the formations of the reservoirs. It was sugggested some years ago that the reservoirs in Albacora Field were mixtures of two oil pulses of different thermal evolution. This hypothes
Publicado em: 1996
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15. Desenvolvimento de um simulador PVT para caracterizar misturas de hidrocarbonetos
In this work a simulator is developed to model the phase behavior of reservoir hydrocarbon mixtures. The simulator consists of a computer program, that is based on equations that represent the phase behavior of the mixture, at equilibrium, under flash and differential liberation processes and various pressure and temperature conditions. The Peng-Robinson EOS
Publicado em: 1991
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16. Estudo da fração acida do querosene de aviação (QAV) e sintese de padrões sesquiterpenicos e acidos carboxilicos para analise em CG-EM
Little attention has been devoted to the composition of the acidic fractions of the Brazilian petroleum. On the other hand, during the course of our previous studies, we observed the occurence of a considerable concentration of naphthenic acids in Cabiunas crude oil. The above facts have motivated our group to start a research line on the study of the acidic
Publicado em: 1990
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17. Diterpene Biosynthesis in Maize Seedlings in Response to Fungal Infection 1
A cell-free system which catalyzes the biosynthesis of terpene hydrocarbons when supplemented with mevalonate, Mn2+, and ATP was prepared from the scutellum-embryonic axis region of maize seedlings. The capacity of this system for the production of terpene hydrocarbons was enhanced 50- to 100-fold when the seedlings were exposed for 48 hours to the fungus Rh
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18. Emulsifier of Arthrobacter RAG-1: specificity of hydrocarbon substrate.
The purified extracellular emulsifying factor produced by Arthrobacter RAG-1 (EF-RAG) emulsified light petroleum oil, diesel oil, and a variety of crude oils and gas oils. Although kerosine and gasoline were emulsified poorly by EF-RAG, they were converted into good substrates for emulsification by addition of aromatic compounds, such as 2-methylnaphthalene.
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19. Microbial transformations of 7,2-dimethylbenz[a]anthracene.
Microbial transformations of 7,12-dimethylbenz[a]anthracene, a carcinogenic polycyclic aromatic hydrocarbon, in cultures of Pseudomonas aeruginosa and Penicillium notatum were studied by high performance liquid chromatographic separation of metabolic fractions followed by gas chromatographic-mass spectrometric analysis of the metabolites. Two methyl-hydroxyl
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20. In Vitro Microbial Degradation of Bituminous Hydrocarbons and In Situ Colonization of Bitumen Surfaces Within the Athabasca Oil Sands Deposit
Bituminous hydrocarbons extracted from the Athabasca oil sands of north-eastern Alberta were adsorbed onto filter supports and placed at sites in the Athabasca River and its tributaries where these rivers come in contact with the oil sands formation. Colonization of the hydrocarbon surfaces at summer and winter ambient temperatures was examined by scanning a
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21. Confirmation of the Identification of the Major C-29 Hydrocarbons of Sarcina lutea
Although there is agreement on the fact that Sarcina lutea strain FD-533 has branched C-29 monoalkenes as major hydrocarbon components, there is disagreement in the literature as to the nature of the branching. This has been resolved by analyses of the fatty acids produced by permanganate-periodate treatment of each of the resolvable hydrocarbon fractions ma
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22. Lipid and protein segregation in Escherichia coli membrane: morphological and structural study of different cytoplasmic membrane fractions.
Lipid and protein segregations can be induced in E. coli cytoplasmic membranes by conformational transitions of their lipid hydrocarbon chains from a disordered to an ordered state. For E. coli strain K 1059 (an unsaturated fatty acid auxotroph) supplemented with linolenic acid, the segregation leads to large areas of membrane surfaces having distinctly diff
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23. Characterization of intracytoplasmic hydrocarbon inclusions from the hydrocarbon-oxidizing Acinetobacter species HO1-N.
The ultrastructure of Acinetobacter sp. strain HO1-N grown on hydrocarbon and nonhydrocarbon substrates was compared using thin sections and freeze-etching. Hydrocarbon-grown cells were characterized by the presence of intracytoplasmic membrane-bound hexadecane inclusions. This membrane did not exhibit a typical unit membrane structure but appeared as a mono
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24. Effect of environmental parameters on the biodegradation of oil sludge.
A laboratory study was conducted with the aim of evaluating and optimizing the environmental parameters of "landfarming", i.e., the disposal by biodegradation in soil of oily sludges generated in the refining of crude oil and related operations. Oil sludge biodegradation was monitored by CO2 evolution and by periodic analysis of residual hydrocarbons. The pa