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. 2024 Jun 27;25(13):7051. doi: 10.3390/ijms25137051

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© 2024 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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Cell viability of UV-irradiated DLD-1 cells. (a) Time series tests with UV irradiation times of 0, 10, 30, 60, 180, and 300 s. Both far-ultraviolet (F-UV) and deep-ultraviolet (D-UV) irradiation showed cytotoxicity as irradiation time increased at 48 h after UV irradiation. (b) The viability of DLD-1 cells at 4, 24, and 48 h after 30 mJ/cm² UV irradiation. The absorbance of MTS is divided by the absorbance before irradiation (control), expressed as a percentage. Mean values with standard errors are shown in the graphs.