Kajian efek sinergis nonylphenol dan Cu (I) terhadap pembentukan 8-OHdG sebagai biomarker DNA adduct secara in-vitro melalui reaksi fenton dan in-vivo pada tikus (rattus norvegicus) = Study of the synergistic effect of nonylphenol and Cu (I) on the formation of 8-OHdG as a biomarker of DNA adduct in-vitro through the fenton and in-vivo reaction in rats (rattus norvegicus)