LABORATORY EQUIPMENT-NAMELY, ELECTROPHORESIS STRIPS; CELL CULTURE FLASKS; CELL CULTURE TUBES; CELL CULTURE RACKS; MEMBRANE FILTERS; ROLLER DRUM ASSEMBLIES FOR GROWTH OF TISSUE CULTURES AND PREPARATION OF TISSUS CULTURES AND PREPARATION OF VIRUS POOLS; ROLLER DRUM TUBES; ROLLER DRUM TUBE CAPS; ROLLER DRUM TUBE CARRIERS; ROLLER DRUM TUBE BRUSHES; LABORATORY INVENTORY CONTROL SYSTEMS COMPRISING STORAGE RACKS AND CONTAINERS FOR STORING VIALS, BOTTLES, TUBES CONTAINING LABORATORY MATERIALS AND CATALOGUE CARDS AND CARD BOXES FOR RECORDING A DESCRIPTION OF THE MATERIALS STORED IN THE CONTAINERS AND RACKS; TISSUE CULTURE LABWARE INCLUDING TISSUE CULTURE DISHES; AND DILUTION EQUIPMENT-NAMELY, MICROTITRATION PLATES, MICROTITRATION PLATE SEALERS, MICROTITRATION PLATE SEALING ROLLERS, PIPETTES, PIPETTE BULBS, PIPETTE FILTERS, FILTER HOLDERS, DILUTERS, MULTIDILUTERS, BLOTTERS, REPLICATORS, MICROTITRATION PLATE READING MIRRORS, PIPETTEDILUTER STANDS, PIPETTE-DILUTER RACKS SOLD AS A UNIT WITH REPLACEMENT PARTS THEREFOR, AND MULTIPIPETTERS