The diffusion of urea through porous glass.
D055592:Biophysical Phenomena; D001703:Biophysics; D002476:Cellophane; D055598:Chemical Phenomena; D002627:Chemistry, Physical; D004058:Diffusion; D005898:Glass; D008567:Membranes, Artificial; D008722:Methods; D013053:Spectrophotometry; D014508:Urea
D008567:Membranes, Artificial; D014508:Urea; D002476:Cellophane