title: Effects of divalent cations on the hypersensitivity of frog photoreceptors.
mesh_terms: D000200:Action Potentials / Q000187:drug effects; D000818:Animals; D001464:Barium / Q000494:pharmacology; D002118:Calcium / Q000494:pharmacology; D002413:Cations, Divalent / Q000494:pharmacology*; D003623:Dark Adaptation / Q000187:drug effects*; D066298:In Vitro Techniques; D008274:Magnesium / Q000494:pharmacology; D010786:Photoreceptor Cells / Q000502:physiology*; D011892:Rana catesbeiana; D013324:Strontium / Q000494:pharmacology; D013997:Time Factors
chemical_list: D002413:Cations, Divalent; D001464:Barium; D008274:Magnesium; D002118:Calcium; D013324:Strontium