Page 4. Beta decay is a radioactive process in which an electron is emitted from the nucleus of a radioactive atom, along with an unusual particle called an antineutrino.The neutrino is an almost massless particle that carries away some of the energy from the decay process.age 4. Beta decay is a radioactive process in which an electron is emitted from the nucleus of a radioactive atom, along with an unusual particle called an antineutrino.
There is also a 12-hour extended-release form of pseudoephedrine; it should also start working within half an hour of taking your first dose, but will last much longer. Because it can last up to 12 hours, remember that you should not take more than two tablets in a 24-hour period.
Research suggests that though it is recommended that you take it within 72 hours after sex, it is moderately effective up to 120 hours (or five days) after sex. However, even though it's referred to as the morning after pill, you don't have to wait for the sun to come up. The sooner it is taken, the more effective it is. Emergency contraception (EC) isn't to be confused with RU-486 (mifepristone), a pill that causes medical abortion in pregnant women within 49 days from the first day of their last menstrual period.