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. 2020 Aug 9;9(8):495. doi: 10.3390/antibiotics9080495

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© 2020 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 (http://creativecommons.org/licenses/by/4.0/).

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Colony-forming activity by extract concentration. (A) Number of viable V79 colonies after cultivation with test discs. V79 colonies in ZDBC and ZDEC were not detected in the undiluted extracts. Regarding viable V79 colonies for polyethylene and for F-DLC in titanium-alloy discs without coating, DLC was detected to the same extent in all extract dilution levels. (B) A graph of colony-forming activity by extract concentration. The activity level in ZDEC and ZDBC was 0% in the undiluted extracts, which shows that the sample are potentially cytotoxic. However, the activity in polyethylene and F-DLC-coated samples was >70%, which shows that the samples were likely non-cytotoxic. DLC, diamond-like carbon; F-DLC, fluorinated diamond-like carbon; ZDBC, 0.25% zinc dibutyldithiocarbamate; ZDEC, 0.1% zinc diethyldithiocarbamate.

Colony-forming activity by extract concentration. (A) Number of viable V79 colonies after cultivation with test discs. V79 colonies in ZDBC and ZDEC were not detected in the undiluted extracts. Regarding viable V79 colonies for polyethylene and for F-DLC in titanium-alloy discs without coating, DLC was detected to the same extent in all extract dilution levels. (B) A graph of colony-forming activity by extract concentration. The activity level in ZDEC and ZDBC was 0% in the undiluted extracts, which shows that the sample are potentially cytotoxic. However, the activity in polyethylene and F-DLC-coated samples was >70%, which shows that the samples were likely non-cytotoxic. DLC, diamond-like carbon; F-DLC, fluorinated diamond-like carbon; ZDBC, 0.25% zinc dibutyldithiocarbamate; ZDEC, 0.1% zinc diethyldithiocarbamate.