biological half-life


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biological half-life

n.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.
Biology The time required for one half of the total amount of a particular substance in a biological system to be degraded by biological processes when the rate of removal is nearly exponential
Nuclear physics The length of time required for one half of a radioactive substance to be biologically eliminated from the body
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.

biological half-life

T1/2 Biology The time required for 1⁄2 of the total amount of a particular substance in a biologic system to be degraded by biological processes when the rate of removal is nearly exponential Radiation physics The length of time required for1/2 of a radioactive substance to be biologically eliminated from the body
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
The physical half-life of caesium-137 is 30.22 years, whereas its biological half-life is 70 days.
Biological half-life of maternal enterovirus 71 neutralizing antibodies in 154 seropositive neonates, determined by crosssectional and longitudinal analyses, Taiwan * Antibody titers GMT at birth at 6 mo of age No.
One of the earliest toxicokinetics studies reported that Pb, once absorbed into the blood compartment, has a mean biological half-life of about 40 days in adult males (Rabinowitz et al.
Further, in blood, DEHP is rapidly metabolized with a biological half-life in humans of < 6 hr (e.g., Peck and Albro 1982).