{
  "accessLevel": "public",
  "bureauCode": [
    "020:00"
  ],
  "contactPoint": {
    "fn": "Christian Andersen",
    "hasEmail": "mailto:andersen.christian@epa.gov"
  },
  "description": "The effects of cerium oxide nanoparticles (CeO2-NPs) on 15N/14N ratio (δ15N) in wheat and barley were investigated.  Seedlings were exposed to 0 and 500 mg CeO2-NPs/L (Ce-0 and Ce-500, respectively) in hydroponic suspension supplied with NH4NO3, NH4+, or NO3-.  N uptake and δ15N discrimination (i.e. differences in δ15N of plant and δ15N of N source) were measured.  Results showed that N content and 15N abundance decreased in wheat but increased in barley.  Ce-500 only induced whole-plant δ15N discrimination (-1.48‰, P ≤ 0.10) with a simultaneous decrease (P ≤ 0.05) in whole-plant δ15N (-3.24‰) compared to Ce-0 (-2.74‰) in wheat in NH4+.  Ce-500 decreased (P ≤ 0.01) root δ15N of wheat in NH4NO3 and NH4+ (3.23 and -2.25‰, respectively) compared to Ce-0 (4.96 and -1.27‰, respectively), but increased (P ≤ 0.05) root δ15N of wheat in NO3- (3.27‰) compared to Ce-0 (2.60‰).  Synchrotron micro-XRF revealed the presence of CeO2-NPs in shoots of wheat and barley regardless of N source.  Although the longer-term consequences of CeO2-NP exposure on N uptake and metabolism are unknown, the results clearly show the potential for ENMs to interfere with plant metabolism of critical plant nutrients such as N even when toxicity is not observed. \n\nThis dataset is associated with the following publication:\nRico, C.M., M. Johnson, M.A. Marcus, and C.P. Andersen. Shifts in N and δ15N in wheat and barley exposed to cerium oxide nanoparticles.   NanoImpact. Elsevier B.V., Amsterdam,  NETHERLANDS, 11: 156-163, (2018).",
  "distribution": [
    {
      "downloadURL": "https://pasteur.epa.gov/uploads/10.23719/1411219/hydroponics%20NH%20barley%20Isotope%20-%20data%20repository%20for%20Chris.xlsx",
      "mediaType": "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
      "title": "hydroponics NH barley Isotope - data repository for Chris.xlsx"
    },
    {
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      "title": "hydroponics NH wheat Isotope - data repository for Chris.xlsx"
    },
    {
      "downloadURL": "https://pasteur.epa.gov/uploads/10.23719/1411219/hydroponics%20NHNO%20barley%20Isotope%20-%20data%20repository%20for%20Chris.xlsx",
      "mediaType": "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
      "title": "hydroponics NHNO barley Isotope - data repository for Chris.xlsx"
    },
    {
      "downloadURL": "https://pasteur.epa.gov/uploads/10.23719/1411219/hydroponics%20NHNO%20wheat%20Isotope%20-%20data%20repository%20for%20Chris.xlsx",
      "mediaType": "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
      "title": "hydroponics NHNO wheat Isotope - data repository for Chris.xlsx"
    },
    {
      "downloadURL": "https://pasteur.epa.gov/uploads/10.23719/1411219/hydroponics%20NO%20barley%20Isotope%20-%20data%20repository%20for%20Chris.xlsx",
      "mediaType": "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
      "title": "hydroponics NO barley Isotope - data repository for Chris.xlsx"
    },
    {
      "downloadURL": "https://pasteur.epa.gov/uploads/10.23719/1411219/hydroponics%20NO%20wheat%20Isotope%20-%20data%20repository%20for%20Chris.xlsx",
      "mediaType": "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
      "title": "hydroponics NO wheat Isotope - data repository for Chris.xlsx"
    }
  ],
  "identifier": "https://doi.org/10.23719/1411219",
  "keyword": [
    "Synchrotron micro XRF",
    "ammonium nitrate",
    "engineered nanomaterials (ENMs)",
    "intergenerational effects",
    "isotope",
    "isotopic discrimination",
    "nitrogen"
  ],
  "license": "https://pasteur.epa.gov/license/sciencehub-license.html",
  "modified": "2018-03-15",
  "programCode": [
    "020:095"
  ],
  "publisher": {
    "name": "U.S. EPA Office of Research and Development (ORD)",
    "subOrganizationOf": {
      "name": "U.S. Environmental Protection Agency",
      "subOrganizationOf": {
        "name": "U.S. Government"
      }
    }
  },
  "references": [
    "https://doi.org/10.1016/j.impact.2018.08.003"
  ],
  "rights": null,
  "title": "Nitrogen and nitrogen isotope data for wheat and barley exposed to CeO2 nanoparticles"
}