312 



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h*nnf iwdlu* or lo» proportion* of •xtncUbl* oieotUM. This oba«nr«tlea 



r«qulr«a V^ntlrMtloo uaIj^ t««hnlqu«a AttlfnmA to (Ir* kjiuutttutlTo 



rocovtr/^ .? • 



Th«M concluiioH^tojtthM- idth r«»ult« fro« other work within H. A D.g. 



oon/lra th4t It Is stlltW cof\«ld«r»bl« vslue to continue with the exAalnatlon 



of f4ctor» »ffeotin« nlcotll^ Aksorptlen In biologic*! t^steas. In this context, 



^^. 

 It 1* lBport*nt to dlfferentl»t« between transport froa the terosol to the 



/. ' : . 



^urfAce, »ja diffusion through Beebrmoes. A nuaber of »ppro*che» 4re being 



considered. 



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