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    The BioVortexer has two distinct applications... Stirring/Dispersment A practical alternative to a conventional vortex mixer for mixing and dispersing samples. Combined with disposable polypropylene stirring rods, it rapidly re-suspends precipitates such as pellets of protein or DNA. The working range is 10-500 mg of powdered or homogenized solids in a media volume of 0.5 to 10 ml. Take the BioVortexer to the sample instead of the sample to the vortex mixer. Grinding/Homogenizing Our SpiralPestle™ grinding pestle is a significant improvement over traditional smooth-walled polypropylene pestle and tube combinations.  Featuring a unique screw-like pattern on its surface, the 'threads' of the turning SpiralPestle serve as a screw pump to draw 10 to 100 mg of soft plant or animal tissue suspended in a 200 to 500 µl of extraction solution to the bottom of the microvial where it is macerated and mechanically dispersed between the rounded bottom of the pestle and vial. Tissue grinding is further enhanced by including a pinch of glass grinding beads (a sample is included with each SpiralPestle order). While pestle and microvial grinders are traditionally operated by hand rotation, optimum homogenization efficiency is achieved by combining the SpiralPestle with the BioVortexer™. With its greatly increased rotational speed (~9000 rpm) and the addition of some glass grinding beads, lysis of soft tissue samples is completed in seconds.