Description_x000D_ Features and Benefits_x000D_ Eppendorf® Safe-Lock tubes, Biopur® (colorless) protect the sample with excellent centrifugation stability, feature optimized sealing properties, and reliably prevent sample evaporation. The features include:_x000D_ • Hinged Eppendorf Safe-Lock lid prevents unintentional lid opening during incubation and storage._x000D_ • Polypropylene provides high resistance to chemicals, mechanical stress and temperature extremes._x000D_ • Manufactured without the use of slip agents, plasticizers, and biocides – substances that have been shown to leach from plastic consumables into the sample and negatively affect bio-assay results, g-Safe®: Exceptional centrifugation stability up to 30,000 × g prevents sample loss due to tube breakage and provides extra safety when working with hazardous samples Precise lid sealing for minimal evaporation rates during long-term storage_x000D_ • Large frosted lid and surface on the side for easy labelling_x000D_ • Guaranteed functionality from -86 °C to 100 °C_x000D_ • Autoclavable when open (121 °C, 20 min)_x000D_ • Available in Eppendorf Protein and DNA LoBind material for maximum recovery of valuable samples._x000D_ Using the Eppendorf 30,000 × g system comprising of Safe-Lock Tubes and Centrifuge 5430 R with high-speed rotor, the effect of relative centrifugal force (rcf), duration of centrifugation and the amount of isopropanol on the recovery rate of plasmid DNA from alcohol precipitation were investigated. All three factors play a role, with rcf having the greatest effect. By centrifuging the Eppendorf Safe-Lock Tubes at 30,000 × g, nearly 90% of DNA could be recovered from a 5 min centrifugation._x000D_ Legal Information_x000D_ Biopur is a registered trademark of Eppendorf AG_x000D_ Eppendorf is a registered trademark of Eppendorf AG_x000D_ g-Safe is a registered trademark of Eppendorf AG