Abstract: Zebra mussels are controlled by contacting them with the active portion of a Phytolacca plant.

Abstract: Zebra mussels (Dreissena polymorpha) are controlled by contacting the mussels with effective lethal amounts of an aqueous treating medium comprising molluscicidally effective portions of the berry from Phytolacca dodecandra.

Abstract: A multiplate, cell propagation device for use in tissue culture having an elongate enclosed vessel containing a plurality of parallel, spaced apart discs secured for rotation within the vessel. The device includes a cradle-like frame for holding the discs in place during rotation thereof, with the entire frame or individual discs being removable from the vessel without disturbing other discs. Means are provided on the frame for selectively holding the discs in place.

Abstract: A tissue culture system for zero gravity high-density cultivation of eucaryotic cells requiring attachment to a substratum in order to differentiate is disclosed. A major component of the system is a cylindrical bottle filled with culture medium and having mounted therein a rotatable shaft. The shaft includes a plurality of collagen-treated discs projecting therefrom and at an angle to the shaft to provide the necessary attachment substratum and to impel the culture medium as the shaft is rotated. Means are provided for initial stocking of the bottle with the culture cells and for continuously supplying fresh medium to and removing waste medium from the bottle.