"keratinous material"@en . . . . "1991-06-04T00:00:00"^^ . . . "material, keratinous"@en . . "Animal material that contains keratin."@en . . . . "300192973" . "2014-01-08T11:38:04"^^ . "material de queratina"@es . . . . . . "keratinisch materiaal"@nl .