Analisis konsentrasi diesel partikulat 2.5 um terhadap stress oksidatif dan penurunan fungsi paru pada penguji mekanis di UP Pengujian Kendaraan Bermotor (PKB) Ujung Menteng dan Cilincing tahun 2018 = Analysis of diesel particulate matter 2.5 um related to oxidative stress and lung function decline on mechanic at vehicle testing center Cilincing and Ujung Menteng 2018