Do a Good Turn

Millipore's Steriflip Filter Unit
Steriflip® Filter Units from Millipore of Bedford, Mass., eliminate loss of liquid sample from centrifuge tubes during filtration. The units are designed to work with standard 50 ml double-lead threaded centrifuge tubes and include a 0.22 µm Millipore Express membrane. Filtration involves simply attaching the unit to a sample-containing tube, flipping the tube/filtration unit over, and applying a vacuum. The unit can be used for a variety of applications, including media and buffer preparation and sterilization of protein solutions. SteriFlip units are available in a 25-count pack for $95.

Millipore, (800) 645-5467,


Pellet Painter

Novagen Inc. of Madison, Wis., offers the Pellet Paint Co-Precipitant for visualization of alcohol-precipitated DNA and RNA pellets. After precipitation, the resulting pellet is a vivid pink color and also fluoresces. The Pellet Paint Co-Precipitant helps researchers visualize nucleic acids from very dilute...

Interested in reading more?

Become a Member of

Receive full access to digital editions of The Scientist, as well as TS Digest, feature stories, more than 35 years of archives, and much more!
Already a member?