Capture and Stabilization of the Hydroxyl Radical in a Uranyl Peroxide Cluster.

Here we describe the synthesis and characterization of a new uranyl peroxide cluster (UPC), U Ox *, which captures and stabilizes oxygen-based free radicals for more than one week. These radical species were first detected with a nitroblue tetrazolium colorimetric assay and U Ox * was characterized by single crystal X-ray diffraction as well as infrared (IR), Raman, UV-Vis-NIR, and electron paramagnetic resonance (EPR) spectroscopies. Identification of the free radicals present in U Ox * was done via room temperature solid and solution state X-band EPR studies using spin trapping methods.

Metabolomics of wheat grains generationally-exposed to cerium oxide nanoparticles.

This study investigated changes in metabolite compositions over three generation exposure of wheat (Triticum aestivum) to cerium oxide nanoparticles (CeO-NPs) in low or high nitrogen soil. The goal was to determine if CeO-NPs affects grains/seeds quality across generational exposure. Seeds from plants exposed for two generations to 0 or 500 mg CeO-NPs per kg soil treatment were cultivated for third year in low or high nitrogen soil amended with 0 or 500 mg CeO-NPs per kg soil.

Wheat exposure to cerium oxide nanoparticles over three generations reveals transmissible changes in nutrition, biochemical pools, and response to soil N.

This study investigated the effects of third generation exposure to cerium oxide nanoparticles (CeO-NPs) on biomass, elemental and N uptake, and fatty acid contents of wheat (Triticum aestivum). At low or high nitrogen treatment (48 or 112 mg N), seeds exposed for two generations to 0 or 500 mg CeO-NPs per kg soil treatment were cultivated for third year in soil amended with 0 or 500 mg CeO-NPs per kg soil. The results showed that parental and current exposures to CeO-NPs increased the root biomass in daughter plants with greater magnitude of increase at low N than high N.