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. 2018 Aug 7;6:340. doi: 10.3389/fchem.2018.00340

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Copyright © 2018 Glass, Trinklein, Abel and Schulze.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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(A) Photo of hydrogels prepared with TiO₂ nanoparticles as photoinitiator (left) and with the commercial photoinitiator α-HAP (right). (B) UV/VIS transmittance spectra of the aforementioned.