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Typical applications include the construction of gas scrubbers, reactors, containment vessels and piping. [6] In coal-fired power plants, it is used for lining heat exchangers. By channeling crude gas through a PFA-lined apparatus, the gas stream can be cooled below its condensation temperature without damaging the heat exchanger.
Several technologies are currently available for remediating PFASs in liquids. These technologies can be applied to drinking water supplies, groundwater, industrial wastewater, surface water, and other applications such as landfill leachate. Influent concentrations of PFASs can vary by orders of magnitude for specific media or applications.
The Professional Fraternity Association (PFA) is an American association of national, collegiate, professional fraternities and sororities that was formed in 1978. Since PFA groups are discipline-specific, members join while pursuing graduate (law, medicine, etc.) degrees as well as undergraduate (business, engineering, etc.) degrees.
Performic acid (PFA) is an organic compound with the formula CH 2 O 3. It is an unstable colorless liquid which can be produced by mixing formic acid with hydrogen peroxide . Owing to its oxidizing and disinfecting action, it is used in the chemical, medical and food industries.
Trifluoroacetic acid is a widely employed acid, used for example in the synthesis of peptides.Its esters are useful in analytical chemistry. Longer-chain perfluoroalkyl carboxylic acids, e.g. with five to nine carbons, are useful fluorosurfactants and emulsifiers used in the production of polytetrafluoroethylene (Teflon) and related fluoropolymers.
In 1993 the National Constitution and Bylaws were ratified and a decision was made to incorporate as a social organization, rendering the sorority both a social and professional organization (due to the NEB's affiliation with the PFA). Articles of Incorporation for Alpha Omega Epsilon, Inc. were filed in Wisconsin. [4]
FEP is very similar in composition to the fluoropolymers PTFE (polytetrafluoroethylene) and PFA (perfluoroalkoxy polymer resin). FEP and PFA both share PTFE's useful properties of low friction and non-reactivity, but are more easily formable. FEP is softer than PTFE and melts at 260 °C; it is highly transparent and resistant to sunlight. [3] [4]
Alpha Chi Sigma (ΑΧΣ) is a professional fraternity specializing in the fields of the chemical sciences. [1] It has both collegiate and professional chapters throughout the United States consisting of both men and women and numbering more than 78,000 members.