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2,3,7,8-Tetrachlorodibenzo-p-dioxin (TCDD) is a polychlorinated dibenzo-p-dioxin (sometimes shortened, though inaccurately, to simply 'dioxin') [3] with the chemical formula C 12 H 4 Cl 4 O 2. Pure TCDD is a colorless solid with no distinguishable odor at room temperature.
2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) is the reference chemical to which the toxicity of other dioxins and DLCs are compared. TCDD is the most toxic DLC known. TCDD is the most toxic DLC known. Other dioxins and DLCs are assigned a scaling factor, or TEF, in comparison to TCDD.
The 2,4,5-T used was contaminated with 2,3,7,8-tetrachlorodibenzodioxin (TCDD), an extremely toxic dioxin compound. During the Vietnam war, between 1962 and 1971, the United States military sprayed 20,000,000 U.S. gallons (76,000,000 L) of chemical herbicides and defoliants in Vietnam, eastern Laos and parts of Cambodia, as part of Operation ...
This estimation was based on the analysis of fat tissue biopsies collected with an interval of 28 months from on 14-year-old girl who for a period of about 2–3 years had been exposed to technical pentachlorophenol. The half-lives of Hexachlorodibenzo-p-dioxin and octachlorodibenzo-p-dioxin were estimated to be 3.5 and 2 years, respectively. [6]
1,4-Dioxin (also referred as dioxin or p-dioxin) is a heterocyclic, organic, non-aromatic [2] compound with the chemical formula C 4 H 4 O 2.There is an isomeric form of 1,4-dioxin, 1,2-dioxin (or o-dioxin). 1,2-Dioxin is very unstable due to its peroxide-like characteristics.
Geʽez (/ ˈ ɡ iː ɛ z / GEE-ez; [4] Ge'ez: ግዕዝ, romanized: Gəʽəz, IPA: [ˈɡɨʕɨz] ⓘ) is a script used as an abugida (alphasyllabary) for several Afro-Asiatic and Nilo-Saharan languages of Ethiopia and Eritrea.
The Pahlavi script is derived from the Aramaic script as it was used under the Sasanians, with modifications to support the phonology of the Iranian languages. It is essentially a typical abjad , where, in general, only long vowels are marked with matres lectionis (although short /i/ and /u/ are sometimes expressed so as well), and vowel ...
The Brahmi script also evolved into the Nagari script, which in turn evolved into Devanagari and Nandinagari. Both were used to write Sanskrit, until the latter was merged into the former. The resulting script is widely adopted across India to write Sanskrit, Marathi, Hindi and its dialects, and Konkani.