BioScience Dictionary

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Found Centrifugation 9 times.

Displaying results 1 to 10.

1. Ammonium sulfate precipitation
In this technique, ammonium sulfate is used to make proteins precipitate out of a solution; the proteins are then collected by centrifugation .

2. Centrifugation
Separating molecules by size or density using centrifugal force s generated by a spinning rotor. G-forces of several hundred thousand times gravity are generated in ultracentrifugation.

3. Cesium chloride (CsCL) gradient centrifugation
A type of density gradient centrifugation , a lab technique used to separate or purify nucleic acid s. It involves putting cesium chloride and the nucleic acids into a centrifuge to be spun for hours or days. The cesium chloride forms a density gradient (highly dense at the bottom, thinnest at the top), and the different nucleic acids separate along the gradient according to their buoyancies in different densities.

4. Density gradient centrifugation
High-speed centrifugation in which molecules "float" at a point where their density equals that in a gradient of cesium chloride or sucrose .

5. Differential centrifugation
A technique for separating organelle s or other differently-sized cell components in a centrifuge ; particles of the same size and weight will settle out into common layers.

6. Equilibrium centrifugation
A type of density gradient centrifugation used to separate protein s or nucleic acid s from a mixture.

7. Plasmapheresis
This is a medical method in which some blood is removed from a person. The blood cells, after being separated from the plasma (usually via centrifugation ), are returned to the person. It has been speculated that this method removes certain proteins that are deleterious to the person, such as autoantibodies. Some limited success has been achieved in the treatment of conditions including: myasthenia gravis (MG), Eaton-Lambert syndrome (ELS), chronic inflammatory demyelinating polyneuropathy (CIDP), Guillain-Barre syndrome (GBS), paraproteinemia, amyotrophic lateral sclerosis (ALS), and multiple sclerosis (MS).

8. Sedimentation
* The process where particles suspended in solution settle out of the solution and to the bottom of the container. This can occur by gravity alone, or by centrifugation (high-speed spinning). * A sedimentological (geological) term for the settling of particles suspended in moving water into layers over time in the same location to form sedimentary deposits.

9. Supernatant
The soluble liquid and action of a sample after centrifugation or precipitation of insoluble solids.