Internal Examination of a Newly Hatched Alligator. A professional can determine the gender of a very small baby alligator, 6 to 10 inches long. One method is to place the creature on its back and hold open his vent with round-tipped tweezers or forceps, with a helper's assistance.
Technetium is the only element below uranium that does not exist on Earth. It is a synthetic (man-made) element produced in a particle accelerator. For many years, chemists knew that an element with atomic number 43 must exist, based on an empty spot in the periodic table.
It is often intravenously injected in a molecular form that is best suited for a certain diagnostic purpose. Technetiumâs characteristics, however, allow it to pass through the body with ease and quickly (2,4). Tc-99m/Tc99. Technetium-99m is the most prevalent diagnostic agent in nuclear medicine. It accounts for 85% of all diagnostic scans and is used around 20 million times per year (1). It is through its unique characteristics as a metastable radioactive isotope that gives it this dominance in the field.