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.
There are many uses of radioactive isotopes. Two of the most common include carbon dating to discover how old fossils and other historical organic (including carbon) artifacts â¦ are and uses of radioactive isotopes in medicine.Radioactive isotopes in medicine are used to help diagnose certain disease states and isolate regions in the body.he rate at which a parent isotope decays to its daughter isotope is considered one half life. Carbon-14 has a half life of 5730 years and its daughter isotope is Nitrogen-14.