Showing 301 - 320 results of 1,818 for search '"petroleum"', query time: 0.18s Refine Results
  1. 301
    Published in 2012
    Repositorio Universidad Nacional de Colombia

    ... petroleum ether, ethyl acetate, buthanolic and aqueous fractions. These extracts and fractions were...
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  2. 302
  3. 303
    Trabajo de grado de pregrado
    Published in 2020
    Repositorio Repositorio UCC

    ... Norma API 653, por sus siglas en Ingles (American Petroleum Institute), que en general, se encarga de...
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  4. 304
  5. 305
  6. 306
    Published in 2013
    Repositorio RiUPTC: Repositorio Institucional UPTC
    .... This article deals mainly, with the relationship between the UIS and the Colombian Petroleum Enterprise...
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