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.
All freshwater ecosystems (lakes, rivers, ponds, streams, wetlands) are home to various life forms, often collectively referred to as the food chain or food web. The numbers and variety of living organisms in a freshwater food web are dependent on the productivity of the ecosystem.n the deeper, open-water areas, algae are the dominant green plants. Collectively, these plants form the base of the freshwater food web. Their conversion, through photosynthesis, of inorganic nutrients and minerals to living (organic) matter is called primary production.