"ultracentrifuge"@en-us . "ultracentrifuge"^^ . . . "0"^^ . "104332474"@en-us . . . . . "104506506"^^ . . . "103558300"@en-us . "a high speed centrifuge used to determine the relative molecular masses of large molecules in high polymers and proteins"@en-us . "04506506-n"^^ . . . "0"^^ .