Define Biological half life. Biological half life synonyms, Biological half life pronunciation, Biological half life translation, English dictionary definition of Biological half life. n. See half-life. American Heritage® Dictionary of the English Lan
1.(General Physics) the time taken for half of the atoms in a radioactive material to undergo decay. Symbol:τ 2.(Biology) the time required for half of a quantity of radioactive material absorbed by a living tissue or organism to be naturally eliminated (biological half-life) or removed...
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 substan...
(biology)the time taken for the amount of a drug or other substance in the body to fall to half its original level Seehalf-lifein the Oxford Advanced American DictionarySeehalf-lifein the Oxford Learner's Dictionary of Academic English ...
2.Biology a.The time required for half the quantity of a drug or other substance deposited in a living organism to be metabolized or eliminated by normal biological processes. Also calledbiological half-life. b.The time required for the radioactivity of material taken in by a living organism ...
from 1861;life-cycleis from 1855;life-expectancyfrom 1847;life-historyin biology from 1870;life-sciencefrom 1935.Life-work"the labor to which one's life has been devoted" is from 1848. Expressionthis is the lifeis from 1919; verbal shrugthat's lifeis from 1924 (earliersuch is life, ...
In subject area: Biochemistry, Genetics and Molecular Biology A drug's half–life is the time required for a drug to reach 50% of steady-state levels during administration or to decay 50% from steady-state levels after administration ceases. ...
57 Unsolved Problems in Number Theory 59:42 The Life and Numbers of Richard Guy (1916 – 2020) 49:10 Aliquot sequences 48:10 Crossing Numbers of Large Complete Graphs 51:05 The Notorious Collatz conjecture 1:17:02 Explicit results about primes in Chebotarev's density theorem 50:06 Richard...
The biological half-life or elimination half life of a substance is the time it takes for a substance (for example a metabolite, drug, signalling molecule, radioactive nuclide, or other substance) to lose half of its pharmacologic, physiologic, or radiologic activity, as per the MeSH ...
The biological half life for in vivo screened I/sup 131/ labeled rat fibrinogen injected intravenously in normal rats was found to be 1.5 days. After 8 to ... GS Shaber,LL Miller - 《Proceedings of the Society for Experimental Biology & Medicine Society for Experimental Biology & Medicine》...