title: Comment on biological effect of elastic nuclear collisions.
mesh_terms: D006371:Helium; D006859:Hydrogen; D007477:Ions; D009584:Nitrogen; D011522:Protons; D012260:Ribonucleases / Q000528:radiation effects*
chemical_list: D007477:Ions; D011522:Protons; D006371:Helium; D006859:Hydrogen; D012260:Ribonucleases; D009584:Nitrogen