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(left) Antibacterial activity of PLA NF filter media containing manuka triketone (5 wt.%) against S. aureus (ATCC 6538P), E. coli (ATCC 8739) and K. pneumoniae (ATCC 4352) tested according to ISO 20743:2013 [43]. (right) Antiviral activity of PLA NF filter media containing manuka triketone (5 wt.%) against influenza A, human coronavirus 229E and SARS-CoV-2 tested according to ISO 18184:2019 [44]. The arrows point at the inhibition of microbial growth.
