title: Letter: Method for measurement of charge in collagen and polyelectrolyte composite materials.
mesh_terms: D003094:Collagen; D004573:Electrolytes; D008564:Membrane Potentials; D008567:Membranes, Artificial; D008722:Methods
chemical_list: D004573:Electrolytes; D008567:Membranes, Artificial; D003094:Collagen