Blar i forfatter "Morales, Victor Hernando"

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    • Plastic photodegradation under simulated marine conditions 

      Delre, Annalisa; Goudriaan, Maaike; Morales, Victor Hernando; Vaksmaa, Annika; Rachel Tintswalo, Ndhlovu; Marianne, Baas; Keijzer, Edwin; de Groot, Tim; Zeghal, Emna; Egger, Matthias; Röckmann, Thomas; Niemann, Helge (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-01-12)
      Ocean plastic pollution is a problem of increasing magnitude; yet, the amount of plastic at the sea surface is much lower than expected. Solar ultraviolet (UV) radiation can induce photodegradation, but its importance in determining the longevity of floating plastic remains unconstrained. Here, we measured photodegradation rates of different plastic types slightly larger than microplastics (virgin ...

    • A stable isotope assay with 13C-labeled polyethylene to investigate plastic mineralization mediated by Rhodococcus ruber 

      Goudriaan, Maaike; Morales, Victor Hernando; van der Meer, Marcel T.J.; Mets, Anchelique; Ndhlovu, Rachel T.; van Heerwaarden, Johan; Simon, Sina; Heuer, Verena B.; Hinrichs, Kai-Uwe; Niemann, Helge (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-11-30)
      Methods that unambiguously prove microbial plastic degradation and allow for quantification of degradation rates are necessary to constrain the influence of microbial degradation on the marine plastic budget. We developed an assay based on stable isotope tracer techniques to determine microbial plastic mineralization rates in liquid medium on a lab scale. For the experiments, <sup>13</sup>C-labeled ...