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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.
Chlorofluorocarbons (CFCs) and hydrochlorofluorocarbons (HCFCs) are fully or partly halogenated hydrocarbons that contain carbon (C), hydrogen (H), chlorine (Cl), and fluorine (F), produced as volatile derivatives of methane, ethane, and propane.
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 ...
In the Philippines, Natural Parks as defined by law are relatively large areas not materially altered by human activity. The extraction of natural resources is not allowed in these areas and they are maintained to protect outstanding natural and scenic areas of national or international significance for scientific, educational, and recreational ...
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
DAISY Digital Talking Book – a talking book format; Musepack – an audio codec; MP3 – lossy audio codec, previously patented; Ogg – container for Vorbis, FLAC, Speex and Opus (audio formats) & Theora (a video format), each of which is an open format; Opus [2] – a lossy audio compression format developed by the IETF.
Name Language Type Area reporting covers ABS-CBN News: English/Filipino: Daily: National Bulatlat [5]: English: Daily: National Cebu Daily News (CDN Digital) English
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