A permission is authorization to perform an operation on a specific object, such as a file. Permissions are granted by owners. If you own an object, you can grant any user or security group permission to do whatever you are authorized to do with it. This includes granting permission to take ownership.
Fracking linked to radioactive river water in Pa. River water in western Pennsylvania has elevated levels of radioactivity, some of it from fluids discharged after fracking for natural gas in the Marcellus Shale area, says a Duke University study Wednesday. Post to Facebook.
Krypton fluoride is used in some lasers. Radioactive krypton was used during the Cold War to estimate Soviet nuclear production. The gas is a product of all nuclear reactors, so the Russian share was found by subtracting the amount that came from Western reactors from the total in the air. From 1960 to 1983 the isotope krypton-86 was used to define the standard measure of length.