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Caesium in the body has a biological half-life of about one to four months. Mercury (as methylmercury) in the body has a half-life of about 65 days. Lead in the blood has a half life of 28–36 days. [29] [30] Lead in bone has a biological half-life of about ten years. Cadmium in bone has a biological half-life of about 30 years.
Methotrexate, formerly known as amethopterin, is a chemotherapy agent and immune-system suppressant. [4] It is used to treat cancer , autoimmune diseases , and ectopic pregnancies . [ 4 ] Types of cancers it is used for include breast cancer , leukemia , lung cancer , lymphoma , gestational trophoblastic disease , and osteosarcoma . [ 4 ]
Up to 13 hours after death, eyeball cooling in pigs provides a reasonable estimate of time since death. [30] After 13 hours, muscle and rectal temperatures in pigs are better estimates of time since death. [31] In dogs: what changes and when. Eye K+ decreases from 1.5 hours after death to 7 hours after death. [32] Rigor mortis of hindlimbs ...
The drug methotrexate (bottom) is an antimetabolite that interferes with the metabolism of folic acid (top). An antimetabolite is a chemical that inhibits the use of a metabolite, which is another chemical that is part of normal metabolism. [1]
For example, the medical sciences refer to the biological half-life of drugs and other chemicals in the human body. The converse of half-life (in exponential growth) is doubling time. The original term, half-life period, dating to Ernest Rutherford's discovery of the principle in 1907, was shortened to half-life in the early 1950s. [1]
Post-mortem phenomena to estimate the time of death. The post-mortem interval ( PMI ) is the time that has elapsed since an individual's death . [ 1 ] When the time of death is not known, the interval may be estimated, and so an approximate time of death established.
The approximate time it takes putrefaction to occur is dependent on various factors. Internal factors that affect the rate of putrefaction include the age at which death has occurred, the overall structure and condition of the body, the cause of death, and external injuries arising before or after death.
Yellapragada Subbarow [a] (12 January 1895 – 8 August 1948) was an Indian American biochemist who discovered the function of adenosine triphosphate (ATP) as an energy source in the cell, [1] developed methotrexate for the treatment of cancer and led the department at Lederle laboratories in which Benjamin Minge Duggar discovered chlortetracycline in 1945.