
Water purification is the process of removing undesirable chemicals, biological contaminants, suspended solids, and gases from water.The goal is to produce water that is fit for specific purposes. Most water is purified and disinfected for human consumption (drinking water), but water purification may also be carried out for a variety of other purposes, including medical, …

Author: A/Prof John Troupis* What is a computed tomography coronary angiography (CTCA)? Angiography is the X-ray imaging of blood vessels using contrast agents injected into the bloodstream (see Angiography).. CTCA uses computed tomography (CT) scanning to take pictures or images (angiograms) of the coronary arteries of the beating heart.

As much as possible, stay in a specific room and away from other people and pets in your home.If possible, you should use a separate bathroom. If you need to be around other people or animals in or outside of the home, wear a well-fitting mask.. Tell your close contacts that they may have been exposed to COVID-19. An infected person can spread COVID-19 starting …

An X-ray, or, much less commonly, X-radiation, is a penetrating form of high-energy electromagnetic radiation.Most X-rays have a wavelength ranging from 10 picometers to 10 nanometers, corresponding to frequencies in the range 30 petahertz to 30 exahertz (3 × 10 16 Hz to 3 × 10 19 Hz) and energies in the range 145 eV to 124 keV.X-ray wavelengths are shorter …

The world's largest artificial reef was created by sinking of the 44,000 ton aircraft carrier USS Oriskany off the coast of Pensacola, Florida, in 2006.. Ex-USNS Hoyt S. Vandenberg. The second-largest artificial reef is USNS Hoyt S. Vandenberg, a former World War II era troop transport that served as a spacecraft-tracking ship after the war. The Vandenberg was scuttled …