ASSESSMENT OF MUTAGENIC RISK OF SOME PETROCHEMICAL GASES——Ⅰ.CONSTRUCTION OF A CLOSED ALL-GLASS GAS EXPOSURE SYSTEM AND STUDY ON THE ETHYLENE INHALATION KINETICS OF RODENTS

Many environmental chemicals,including some smallmolecule petrochemical products are taken up by animalbody via,namely,respiratory tract,i.e.by the processof inhalation.