Showing 321 - 340 results of 1,665 for search '"petroleum"', query time: 0.43s Refine Results
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    Published in 2009
    Repositorio Universidad Nacional de Colombia

    ... suelo al reducir los niveles de contaminación. / Abstract. In order to deal with the petroleum...
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  6. 326
    Article of journal
    Repositorio Universidad Nacional de Colombia

    ... with petroleum ether and ethyl acetate. The total extract and the two fractions were diluted at different...
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    Trabajo de grado de pregrado
    Published in 2017
    Repositorio Séneca: repositorio Uniandes

    ...Petroleum industry has a great influence in Colombian economy. Because of this, the drastic price...
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    http://purl.org/coar/version/c_b1a7d7d4d402bcce
    Published in 2004
    Repositorio Repositorio UIS

    .... Estudios realizados y publicados por la Society Petroleum Engineer (SPE), muestran que los principales...
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