Amyotrophic lateral sclerosis, or ALS, is a disease in which certain nerve cells in the brain and spinal cord slowly die. These nerve cells are called motor neurons, and they control the muscles that allow you to move the parts of your body. ALS is also called Lou Gehrig's disease.LS is rare. Each year in the United States and most of the world, only 1 to 2 people out of 100,000 get ALS. Men get ALS slightly more often than women do.
Technetium-99m is a metastable nuclear isomer of technetium-99 (itself an isotope of technetium), symbolized as 99m Tc, that is used in tens of millions of medical diagnostic procedures annually, making it the most commonly used medical radioisotope.his procedure produced molybdenum-99, a radionuclide with a longer half-life (2.75 days), which decays to Tc-99m. At present, molybdenum-99 (Mo-99) is used commercially as the easily transportable source of medically used Tc-99m.
Technetium-95, with a half-life of 61 days, is used as a radioactive tracer. Technetium-99, has a very long half-life (2.11 X 10 5 years) and decays almost entirely by beta decay with no gamma rays.It is used as for equipment calibration.echnetium is a rare, silver-gray metal that tarnishes slowly in moist air. In powder form, it burns in oxygen to the heptoxide (Tc 2 O 7). Technetium dissolves in nitric acid and concentrated sulfuric acid, but is not soluble in hydrochloric acid of any strength.