Nafion is a sulfonated tetrafluoroethylene based fluoropolymer-copolymer discovered in the late 1960s by Walther Grot of DuPont. It is the first of a class of synthetic polymers with ionic properties which are called ionomers.his form of Nafion, referred to as the neutral or salt form, is finally converted to the acid form containing the sulfonic acid (-SO 3 H) groups. Nafion can be cast into thin films by heating in aqueous alcohol at 250 Â°C in an autoclave.
Antarctic Ecosystem: Abundance of Life Diatoms like these are at the base of the Antarctic food chain. In summer they use photosynthesis to grow, and multiply into huge populations. Young (juvenile) krill that were collected in a net. A curious Emperor penguin approaches a technician.
Millions of years ago, Antarctica was warmer and much wetter, and supported the Antarctic flora, including forests of podocarps and southern beech. Antarctica was also part of the ancient supercontinent of Gondwana, which gradually broke up by plate tectonics starting 110 million years ago.he Antarctic flora subsequently died out in Antarctica, but is still an important component of the flora of southern Neotropic (South America) and Australasia, which were also former parts of Gondwana.