Radioactive tracer such as a cell or tissue, or as a flow tracer to track fluid flow. Radioactive tracers are also used to determine the location of fractures created by hydraulic fracturing in natural gas production. Radioactive tracers form the basis of a variety of imaging systems, such as, PET scans, SPECT scans and technetium scans. Radiocarbon dating uses the naturally occurring carbon-14 isotope as an isotopic label. Isotopes of a chemical element differ only in the mass number. For example, the isotopes of hydrogen can be written as H, H and H, with the mass number at top left. When the
Isotope 244 expected release date in the fourth quarter of 2012. Isotope 244 Isotope 244 is a video game developer, based in the USA. It was founded by James Bryant in 1999. Isotope 244 is best known for developing retro remakes and real-time strategy genres for both desktop and mobile devices. Isotope 244 was also a leading developer of 3D screensavers in the early 2000s. The company received several mentions for its retrogaming and real-time strategy games, above all on portable platforms. IP Atomic Cannon Pocket was a notable turn-based strategy game available on the Pocket PC. It was the top selling