News tagged with centrifuge
A centrifuge is a piece of equipment, generally driven by an electric motor (some older models were spun by hand), that puts an object in rotation around a fixed axis, applying a force perpendicular to the axis. The centrifuge works using the sedimentation principle, where the centripetal acceleration causes more dense substances to separate out along the radial direction (the bottom of the tube). By the same token, lighter objects will tend to move to the top (of the tube; in the rotating picture, move to the centre).
In the picture shown, the rotating unit, called the rotor, has fixed holes drilled at an angle (to the vertical). Test tubes are placed in these slots and the motor is spun. As the centrifugal force is in the horizontal plane and the tubes are fixed at an angle, the particles have to travel only a little distance before they hit the wall and drop down to the bottom. These angle rotors are very popular in the lab for routine use.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
Scientists discover enzyme that could slow part of the aging process in astronauts -- and the elderly
New research published online in the FASEB Journal suggests that a specific enzyme, called 5-lipoxygenase, plays a key role in cell death induced by microgravity environments, and that inhibiting this enzyme will likely help p ...
Genetics Apr 30, 2012 | 5 / 5 (1) | 0 |
(Medical Xpress) -- In parts of the world without reliable electricity, a pedal-powered nebulizer could provide life-saving asthma treatments. Small wax-filled sleeping bags could keep premature infants warm. ...
Other Apr 24, 2012 | not rated yet | 0
Patients undergoing molecular imaging to evaluate their stomach's ability to clear food are going to have an altogether new kind of breakfast. A study presented at SNM's 58th Annual Meeting has confirmed that nuclear medicine ...
Cancer Jun 06, 2011 | not rated yet | 0