![half life meaning half life meaning](https://pics.me.me/whats-the-half-life-symbol-means-valvetime-net-valve-news-52241314.png)
![half life meaning half life meaning](https://www.xyht.com/wp-content/uploads/2019/10/VibrantAfrica.jpg)
On the other hand, t 1/2 is the elimination half-life.Ħ. Where, Vd = Volume of distribution and CL = Clearance.ĥ. On the other hand, the equation for calculating t½: The equation for calculating t max (peak plasma time): While at t 1/2, the concentration of a drug may or may not in peak. At tmax, the concentration of a drug is in peak. while t 1/2 is dependent on the elimination rate (k) and volume of distribution (Vd).ģ. The t max is dependent on the elimination rate (k) and absorption rate constant (ka). In pharmacokinetic, elimination half-life, t 1/2 refers to the time required for half the dose of drug administered to be removed from the body.Ģ.
![half life meaning half life meaning](http://acronymsandslang.com/acronym_image/33/721efce4041ae5c9a4adfc17d6a9e73b.jpg)
In other words, t ½ (elimination half-life) is the time required for the amount or concentration of a drug to decrease by one-half. On the other hand, t 1/2 (elimination half-life) is the time required to decrease the drug concentration within the body by one-half during elimination. Also, at t max, the drug absorption rate exactly equals the drug elimination rate. C max is the maximum (peak) plasma drug concentration attained after the oral administration of the drug. Simply, t max is the time to reach C max. The t max (time of peak plasma concentration) is the time required to reach maximum drug concentration in the plasma after drug administration. Definition of Peak plasma time or time for peak plasma concentration or time of peak plasma concentration or t max and t1/2 The x-axis is the number of half-lives passed, and the y-axis is how much of the original amount of the radioactive element is left.1. The decay of all radioactive elements can be shown with this graph: That means that no matter how many half-lives of element #x# have passed, some tiny amount of element #x# will remain. The half-life concept applies to any possible amount of a radio active element: If I have #y# amount of element #x#, after the span of element #x#'s half-life, I will have #y/2# amount of element #x#. grandchildren would have half a cubic kilometer of Uranium, as well as radiation poisoning. If I had a cubic kilometer of Uranium, in 4.5 billion years one of my great-great-great. grandchildren would have half a cubic millimeter of Uranium. If I had a cubic millimeter of Uranium, in 4.5 billion years one of my great-great-great. Half-lives can vary widely, but all radioactive elements have them.Īn important concept to understand is that half-lives apply to any amount of a radioactive material. Bismuth, the most stable radioactive element, has a half-life of 19,000,000,000,000,000,000 years. Uranium's most common isotope has a half life of 4,500,000,000 billion years. More stable (but still very dangerous) ones, have far longer ones. Some radioactive elements, with the highest atomic numbers, have half-lives of seconds. Radioactive elements break down into simpler ones due to their instability. This doesn't apply to things like compost and paper, which break down into their components and become soil, but radioactive things. What we mean when we say half life is how long it takes for half of any amount of something to break down.