Wheaton Science Products has long been an innovator in cell culture flasks. The patented Wheaton Magna Flex« impeller produces high-yield cultures by maintaining even circulation while keeping microcarriers in suspension. Slow acceleration and slow stop from the Wheaton Micro-Stir« stirrer prevent cell detachment. Wheaton also invented an adjustable impeller flask that does not have a rod extending through the top of a flask. In today¦s market the Celstir« design is the standard flask type for cell culture. Celstir flasks feature adjustable blade impeller for increased aeration and dimpled bottom to prevent the accumulation of cells under the impeller (dimpled bottom on 125 mL size and larger). When used with the Micro-Stir, which can operate at very low speeds, the Celstir flask provides an optimum environment for most suspension lines, including insect cell cultures. Hybridomas and adapted cell lines can also be grown in these spinner flasks. Sidearms on Magna Flex and Celstir vessels 500 mL and larger were widened to accommodate monitoring and control devices or media inlet/outlet lines. Wheaton has now moved cell culture another step forward with its innovative MantaRayÖ single-use culture flask. The MantaRay comes presterilized to protect cell cultures. The MantaRay has a unique impeller that provides efficient, gentle stirring for both suspension or microcarrier culture. The MantaRayÖ is disposable; discard it after use and save the time, trouble and expense of autoclaving and cleaning it. The MantaRay is made of unbreakable cell-friendly materials, which enhances lab safety. The Wheaton Celstir« features an adjustable paddle blade impeller for better mixing. The impeller does not protrude through the top cap, thereby maximizing incubator space and reducing the chance for contamination. The addition of the bottom dimple to flasks 125 mL and larger improves circulation and reduces the accumulation of cells in the center of the flask. Units 500 mL and larger have a 45 mm sidearm to be used as an air vent, media inlet or outlet, inoculation port, pH probe inlet, or for other applications. Celstirs provide maximum surface interface between culture and flask atmosphere. All flasks are proportioned to provide a head space ratio of 1:1 or greater. Use the Celstirs for microcarrier and suspension cultures such as insect cells, hybridomas and adapted cell lines. The unit consists of a glass flask, Teflon« and glass impeller assembly, and Teflon« and silicone-lined top cap. It is designed for use with Wheaton Micro-Stir« magnetic stirrers. The entire unit may be autoclaved. Wheaton also offers a non-breakable stainless steel shaft assembly kit as a retrofit to your Celstir (see 356874 series). Sizes 125 to 1000 mL are graduated in 50 mL increments; sizes 3000 to 8000 mL are graduated in 500 mL increments; sizes 25 mL and 50 mL are non-graduated. Celstirs are made from Wheaton 33« low extractable borosilicate glass (meets ASTM Type I Class A and USP Type I Standards). Units 500 mL and larger can be used with the Vented Cap (12-W240751).Choose from Jacketed or Non Jacketed

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