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Some important organofluorine compounds. A: fluoromethane B: isoflurane C: a CFC D: an HFC E: triflic acid F: Teflon G: PFOS H: fluorouracil I: fluoxetine Organofluorine chemistry describes the chemistry of organofluorine compounds, organic compounds that contain a carbon–fluorine bond.
The United States Environmental Protection Agency (EPA) defines PFAS in the Drinking Water Contaminant Candidate List 5 as substances that contain "at least one of the following three structures: R−CF 2 −CF(R')R", where both the −CF 2 − and −CF− moieties are saturated carbons, and none of the R groups can be hydrogen; R−CF 2 −O ...
Identity document Issued by Issued for Ref. Community Tax Certificate (CTC) Cedula: Municipal/City government: Residents of a local government unit [9]Barangay certificate of residency
This is the list of state-funded schools, colleges and universities [1] in the Philippines. The list includes national colleges and universities system, region-wide colleges and universities system, province-wide colleges and universities system, and specialized schools. This list does NOT include locally funded schools, colleges and ...
This is a complete list of cities and municipalities in the Philippines. The Philippines is administratively divided into 82 provinces ( Filipino : lalawigan ). These, together with the National Capital Region , are further subdivided into cities (Filipino: lungsod ) and municipalities (Filipino: bayan ).
The difference between the corresponding date and the collection date of the seawater sample is the average age for the water parcel. [71] The age of a parcel of water can also be calculated using the ratio of two CFC partial pressures or the ratio of the SF 6 partial pressure to a CFC partial pressure. [71]
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The Philippines is projected to be one of the most vulnerable countries to the impacts of climate change, [5] which would exacerbate weather extremes. As the Philippines lies on the Pacific Ring of Fire, it is prone to natural disasters, like earthquakes, typhoons, and volcanic eruptions.