How often to water and fertilize: While growing, cacti and succulents should be watered at least once a week. Some people water more often than this. During each watering, give the soil a good soaking, so that water runs out of the 'drainage holes' of the pots. During the growing season, a balanced fertilizer, which has been diluted to 1/4 strength, can be added to the water for each watering.
Explain the scientific and technical concepts related to nuclear medicine. 1  Nuclear medicine is a specialized branch of modern medicine that exploits the process of radioactivity for imaging, diagnosis, and treatment. Many imaging techniques inject small amounts of radioactive material into the body, which are then tracked by a sensing device specific to the type of radiation emitted from that material.
An important nuclear medicine procedure is Magnetic Resonance Imaging (MRI), which uses powerful magnets and radio waves to create cross-sectional images of organs and internal structures in the body. It does not use radioisotopes or ionizing radiation, but relies on nuclear magnetic resonance of hydrogen.