
Centrifuges are common, useful tools in the modern laboratory, especially in the biology lab.Like all other centrifuges, laboratory centrifuges work by the sedimentation principle, where the centripetal acceleration is used to separate substances of greater and lesser density.
The smaller centrifuges are known as microcentrifuges or microfuges, and microcentrifuge tubes or microfuge tubes are used with them. Microcentrifuge tubes or microfuge tubes are small, cylindrical plastic containers with conical bottoms, typically with an integral snap cap. They are used in molecular biology and biochemistry to store and centrifuge small amounts of liquid. As they are inexpensive and considered disposable, they are used by many chemists and biologists as convenient sample vials in lieu of glass vials; this is particularly useful when there is only a small amount of liquid in the tube or when small amounts of other liquids are being added, because microcentrifugation can be used to collect the drops together at the bottom of the tube after pipetting or mixing
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