Metered-dose inhaler stringent set of criteria, they must: In the early days of MDIs the most commonly used propellants were the chlorofluorocarbons CFC-11, CFC-12 and CFC-114. In 2008 the Food and Drug Administration announced that inhalers using chlorofluorocarbons as a propellant, such as Primatene Mist, could no longer be manufactured or sold as of 2012. This followed from the U.S. decision to agree to the 1987 Montreal Protocol on Substances that Deplete the Ozone Layer. Phospholipids are important natural surfactant lipids used in enhancing penetration and bioavailability. Phospholipids act by reducing the high surface tension forces at the air-water interface within the
Encrypted Title Key normal result of updating a recordable MKB shall also use these same protocols. These protocols are: - Recovery Protocol When the Encrypted Title Keys are in a Separate File: In this case, the original recording device shall rename the old encrypted Title Keys to a defined temporary name before beginning to write the new encrypted Title Key File. -Recovery Protocol When the Encrypted Title Keys are in the Content File: In the extreme case, each content file contains its own encrypted Title Key. In that case, it is not likely that there is a temporary version of the encrypted Title