"the disappearance of electrical resistance at very low temperatures"@en-us . . "0"^^ . . "superconductivity"^^ . . . . . . "110672008"@en-us . "11409892-n"^^ . . "0.375"^^ . "superconductivity"@en-us . . "111409892"^^ . "107765520"@en-us . "the disappearance of electrical resistance at very low temperatures"@en-us . .