title: Gas diffusion through non-tubular pores.
abstract: An equation is derived for quantifying the diffusion of gases through the funnel-shaped pores of eggshells. Calculations based on this approach indicate that diffusion in such pores is largely determined by the inner pore radius and that the thickness of the eggshell and its cuticle are relatively unimportant. The approach is extended to include other noncylindrical pores.
mesh_terms: D000818:Animals; D001717:Birds; D004058:Diffusion; D004528:Egg Shell / Q000648:ultrastructure*; D004625:Embryo, Nonmammalian / Q000378:metabolism; D005740:Gases / Q000378:metabolism*; D008433:Mathematics
chemical_list: D005740:Gases