ultracentrifuge


Also found in: Dictionary, Thesaurus, Encyclopedia, Wikipedia.

ultracentrifuge

 [ul″trah-sen´trĭ-fūj]
the centrifuge used in ultracentrifugation.

ul·tra·cen·tri·fuge

(ŭl'tră-sen'tri-fyūj),
A high-speed centrifuge (up to 100,000 rpm) by means of which large molecules, for example, of protein or nucleic acids, are caused to sediment at practicable rates; used for determinations of molecular weights, separation of large molecules, criteria of homogeneity of large molecules, conformational studies, etc.

ultracentrifuge

(ŭl′trə-sĕn′trə-fyo͞oj′)
n.
A high-velocity centrifuge used in the separation of colloidal or submicroscopic particles.

ul′tra·cen·trif′u·gal (-trĭf′yə-gəl, -trĭf′ə-gəl) adj.
ul′tra·cen·trif′u·gal·ly adv.
ul′tra·cen′tri·fu·ga′tion (-fyo͝o-gā′shən) n.

ultracentrifuge

[ul′trəsen′trifyo̅o̅j]
Etymology: L, ultra, beyond; Gk, kentron, center; L, fugere, to flee
a high-speed centrifuge with a rotation rate fast enough to produce sedimentation of protein and viruses, even in blood plasma. Use of an attached microscope may make it possible to see the sediment.

ul·tra·cen·tri·fuge

(ŭl'tră-sen'tri-fyūj)
A high-speed centrifuge by means of which large molecules (e.g., of protein or nucleic acids) are caused to sediment at practicable rates.

ultracentrifuge

A device for rotating small containers at extremely high speed so as to expose the liquid contents to powerful centrifugal force, of the order of 100,000 g. Ultracentrifuges are used to separate particles of molecular size and determine molecular weights.

ultracentrifuge

a machine capable of spinning a rotor at speeds of up to 50 000 revolutions per minute, producing up to 500 000 g forces. The high speeds enable the separation of tiny particles, which are identified by the rate at which they move down the centrifuge tube. The unit of rate is called the Svedberg (S), after the inventor of the ultracentrifuge. Thus RIBOSOMES are found to consist of two subunits after ultracentrifugation, called 30S and 50S. See also DENSITY-GRADIENT CENTRIFUGATION, DIFFERENTIAL CENTRIFUGATION, MICROSOMAL FRACTION.

ul·tra·cen·tri·fuge

(ŭl'tră-sen'tri-fyūzh)
A high-speed centrifuge by means of which large molecules sediment at practicable rates.

ultracentrifuge,

n a high-speed centrifuge with a rotation rate fast enough to produce sedimentation of viruses, even in blood plasma. Many kinds of biochemical analyses use ultracentrifuge, including such analyses as the measurement and separation of some proteins and viruses.

ultracentrifuge

the centrifuge used in ultracentrifugation.
References in periodicals archive ?
2003), to increase the numbers of the bacterium, to insure the DNA extraction from the honey samples and to eliminate the need of ultracentrifuge that may be not available.
Two ultracentrifuge tubes containing 5 mL of 9% iodixanol solution were underlayed with 4 mL extracted mouse plasma in 1 mL iodixanol.
Assuming that your lipid panel reports total cholesterol, triglycerides, low-density lipoprotein cholesterol (LDL-C), and high-density lipoprotein cholesterol (HDL-C), your best bet is to send very lipemic specimens to an National Heart, Lung and Blood Institute-Centers for Disease Control and Prevention (NHLBI-CDC) standardized laboratory, (1) which uses the classical preparative ultracentrifuge procedure.
Any instrument that operates at 35,000-100,000 rpm is an ultracentrifuge.
Sequently, membrane fractions were collected by ultracentrifugation at 120,000 g for 2 h at 4[degrees]C using an Optima[TM] Max Ultracentrifuge with the MLA-80 rotor (Beckman-Coulter, USA).
A Beckman ultracentrifuge (L8-70M, Beckman, Boston, MA) was used to carry out fractionation.
Set 1 - Table Ultracentrifuge with different rotors;
A major breakthrough came with the development of the zonal ultracentrifuge in the 1960s (invented by Norman G.
As the market for bench-top systems grows, however, the demand for floor-standing, high-speed and ultracentrifuge systems is expected to decline.
38 swinging rotor at 4[degrees]C for 4 h using the Centricon T-1080 ultracentrifuge (Kontron AG, Switzerland).
The end result of this work included the design and construction of the K-II large-scale ultracentrifuge (7-10).