?:definition
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Reservoirs intended to be used as temperature controlled baths that incorporate a mechanism to rotate the sample container (i.e., flask, vial) during exposure to temperatures below the freezing point of water. Rotation of the sample container during the cooling process in intended to form a thin layer of frozen sample on the interior surface of the container. These baths are typically used to prepare samples for lyophilization (i.e., freeze drying).
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