Studi Pembentukan DNA Adduct (8-OHdG) Sebagai Biomarker Risiko Kanker Secara In vitro Pada 2?deoksiguanosin Dan Secara In vivo Pada Tikus (Rattus norvegicus) Akibat Paparan Senyawa Malondialdehyde (MDA) Melalui Reaksi Fenton-Like Dengan Logam Cr (VI) = The Study of DNA Adduct (8-OHdG) Formation as A Cancer Risk Biomarker as In Vitro in 2deoxyguanosine DNA and as In Vivo on Rats (Rattus norvegicus) Treated by Malondialdehyde (MDA) Through Fenton-like Reaction with Cr (VI) Metals