biologic half-life

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• half-life — The period in which the radioactivity or number of atoms of a radioactive substance decreases by half; similarly applied to any substance, such as a drug in serum, whose quantity decreases exponentially with time. Cf.:half time. biologic half… …   Medical dictionary

• biological half-life — or biologic half life n the time that a living body requires to eliminate one half the quantity of an administered substance (as a radioisotope) through its normal channels of elimination * * * the time required for a living tissue, organ, or… …   Medical dictionary

• Luteinizing hormone — beta polypeptide Identifiers Symbol LHB Entrez 3972 HUGO …   Wikipedia

• Follicle-stimulating hormone — (FSH) is a hormone synthesized and secreted by gonadotropes in the anterior pituitary gland. FSH regulates the development, growth, pubertal maturation, and reproductive processes of the human body. FSH and Luteinizing hormone (LH) act… …   Wikipedia

• Heparin — Systematic (IUPAC) name see Hep …   Wikipedia

• Jeanatope — is iodinated I 125 human serum albumin, typically injected to aid in the determination of total blood and plasma volume. I 125 is a radioactive isotope of Iodine, it decays by electron capture with a physical half life of 60.14 days. The biologic …   Wikipedia

• Human placental lactogen — HPL redirects here. For other uses, see HPL (disambiguation). chorionic somatomammotropin hormone 1 (human placental lactogen) Crystal Structure of Human Placental Lactogen.[1] …   Wikipedia

• nordazepam — An active sedative/hypnotic of the benzodiazepine class; an active metabolite of diazepam, chlorazepate, and several other benzodiazepines; has a long biologic half life (40–80 hours) …   Medical dictionary

• radiation — radiational, adj. /ray dee ay sheuhn/, n. 1. Physics. a. the process in which energy is emitted as particles or waves. b. the complete process in which energy is emitted by one body, transmitted through an intervening medium or space, and… …   Universalium

• radioactivity — /ray dee oh ak tiv i tee/, n. Physics, Chem. the phenomenon, exhibited by and being a property of certain elements, of spontaneously emitting radiation resulting from changes in the nuclei of atoms of the element. Also called activity. [1895… …   Universalium

• electromagnetic radiation — Physics. radiation consisting of electromagnetic waves, including radio waves, infrared, visible light, ultraviolet, x rays, and gamma rays. [1950 55] * * * Energy propagated through free space or through a material medium in the form of… …   Universalium