ultracentrifuge

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ultracentrifuge

 [ul″trah-sen´trĭ-fūj]
the centrifuge used in ultracentrifugation.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

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.
Farlex Partner Medical Dictionary © Farlex 2012

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.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

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.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

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.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005

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.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005

ul·tra·cen·tri·fuge

(ŭl'tră-sen'tri-fyūzh)
A high-speed centrifuge by means of which large molecules sediment at practicable rates.
Medical Dictionary for the Dental Professions © Farlex 2012
References in periodicals archive ?
Centrifuging blood and harvesting the plasma from the ultracentrifuged microhematocrit tubes appears to be an appropriate means of obtaining sufficient sample volumes to perform plasma biochemical testing on patients as small as 50 g.
Difference, mean (SD) Analyte and Indirect ISE Direct ISE correction (ultracentrifuged) (mmol/L)--formula- formula (a) --formula-corrected corrected value (mmol/L) value (mmol/L) [Na.sup.+] F1 -4 (1.90) -3 (2.4) F2 -2 (2.3) -1 (2.6) F3 0 (1.9) 1 (3.2) [Cl.sup.-] F4 -1 (1.8) 2 (2.6) F5 -1 (1.5) 2 (2.5) [K.sup.+] F6 -0.11 (0.14) 0.01 (0.16) F7 -0.16 (0.08) 0.08 (0.22) (a) F1, F2, F4, and F6 are published correction formulas.
Three serum samples with albumin concentrations 650 [micro]mol/L were ultracentrifuged at 141 000g for 24 h or at 230 000g for 19 h.
To evaluate the stability of ultracentrifuged samples, 17 replicates were analyzed by the 5-, 1-, and 0.23-mL [beta]-quantification methods.
However, apo B concentrations in the ultracentrifuged sample tended to be higher than those measured in the immunoseparated filtrate, especially at mean LDL-apo B concentrations >~1.0 g/L (Fig.
Then it was ultracentrifuged in a Beckman L7 ultracentrifuge at 100 OOOg for 30 min at 4 [degrees]C.