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    TiO2 tagged posts

    Titanium Dioxide: E171 first enters the Blood via the Mouth

    May 24, 2023, Categories  Biology/Biotechnology, Health/Medical

    Titanium dioxide: E171 first enters the blood via the mouth
    Correlative secondary electron (SE) imaging, scanning transmission ion microscopy (STIM) and secondary ion mass spectrometric (SIMS) elemental mapping of ultrathin sections of buccal TR146 cells exposed to food-grade TiO2 (E171) particles for 24 hours. In contrast to the TEM images presented in figure 2, SE imaging obtained with a helium ion microscope (here, npSCOPE) reveals predominantly topographical information. The thin sections therefore show only limited contrast of the cell structures and the nanoparticles are easily recognized. For TEM-like imaging, the STIM detector attached to the npSCOPE prototype device allows investigation of the transmitted beam information and highlights the NP in relation to the cellular ultrastructure...
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    New Artificial Leaf safely creates Fuel from Sunlight and Water with record Efficiency and Stability

    August 29, 2015, Categories  Physics, Technology/Electronics

    Illustration of an efficient, robust and integrated solar-driven prototype featuring protected photoelectrochemical assembly coupled with oxygen and hydrogen evolution reaction catalysts. [View full size] Credit: Image provided courtesy of Joint Center for Artificial Photosynthesis; artwork by Darius Siwek. - See more at: http://www.caltech.edu/news/artificial-leaf-harnesses-sunlight-efficient-fuel-production-47635#sthash.l86JNzpe.dpuf

    Illustration of an efficient, robust and integrated solar-driven prototype featuring protected photoelectrochemical assembly coupled with oxygen and hydrogen evolution reaction catalysts. [View full size] Credit: Image provided courtesy of Joint Center for Artificial Photosynthesis; artwork by Darius Siwek. – See more at: http://www.caltech.edu/news/artificial-leaf-harnesses-sunlight-efficient-fuel-production-47635#sthash.l86JNzpe.dpuf

    The new Artificial Leaf JCAP system has 3 main components: 2 electrodes–one photoanode and one photocathode, and a membrane. The photoanode uses sunlight to oxidize water molecules, generating protons and electrons as well as oxygen gas. The photocathode recombines the protons and electrons to form H2...

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