Ultrasonic humidifiers are the quietest humidifiers available, and the ideal choice when noise level is a concern (if you are a light sleeper). In general, a warm moisture humidifier will be much quieter than a cool moisture evaporative humidifier.
Iodine is a chemical element with symbol I and atomic number 53. The heaviest of the stable halogens, it exists as a lustrous, purple-black metallic solid at a standard conditions that sublimes readily to form a violet gas. The elemental form was discovered by the French chemist Bernard Courtois in 1811.
Answer Wiki. Oxygen is needed as the final electron acceptor in the electron transport chain. As nutrients (i.e. fats, sugars) are oxidized (metabolized), NAD+ is reduced to NADH. In order for more sugar and fats to be metabolized, NADH needs to be regenerated to NAD+ by dumping it's electrons on another molecule with a higher electron affinity.