You may need a backup method of birth control if you have vaginal intercourse during the seven days after a missed pill. Some backup methods are the condom, female condom, diaphragm, or sponge. You can also use emergency contraception (morning after pill) up to five days after unprotected intercourse.
Strontium-90, a radioactive isotope, is a by-product of nuclear reactors and present in nuclear fallout. It has a half-life of 28 years. It is absorbed by bone tissue instead of calcium and can destroy bone marrow and cause cancer. However, it is also useful as it is one of the best high-energy beta-emitters known. It can be used to generate electricity for space vehicles, remote weather stations and navigation buoys.
One of these purposes is the Technetium-99m Generator.Technetium-99m, a man made element and a type of technetium isotope, has been used as a radioisotope since 1958. Since all isotopes of technetium are radioactive so is technetium-99m.The radioisotope is used to diagnose diseased organs. The injection of the technetium-99m isotope gives off a certain type of radiation which show doctors which areas of the organ is diseased without causing radiation damage to the patient.ne of these purposes is the Technetium-99m Generator.Technetium-99m, a man made element and a type of technetium isotope, has been used as a radioisotope since 1958. Since all isotopes of technetium are radioactive so is technetium-99m.