title: Immersion weighing method for recording the flows through macroscopic membranes.
abstract: The continuous record of the apparent weight of a membrane-bounded small vessel immersed in a solution of different density as compared to that inside it, offers a cheap and reliable possibility to measure osmotic flows at 10(-5) kg x m-2 x s-1 sensitivity. The method equally applies for diffusional (isotopic) water flows.
mesh_terms: D000818:Animals; D001001:Anura; D002463:Cell Membrane Permeability; D008433:Mathematics; D008567:Membranes, Artificial; D001743:Urinary Bladder / Q000378:metabolism; D014882:Water-Electrolyte Balance
chemical_list: D008567:Membranes, Artificial