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13 hours ago · Properties and chemistry DDT is similar in structure to the insecticide methoxychlor and the acaricide dicofol. It is highly hydrophobic and nearly insoluble in water but has good solubility in most organic solvents, fats and oils. DDT does not occur naturally and is synthesised by consecutive Friedel–Crafts reactions between chloral (CCl 3 CHO) and two equivalents of chlorobenzene (C 6 H 5 ...
13 hours ago · A 2022 study, which looked at modern-day populations and more than 700 ancient genomes from Southern Europe and West Asia covering a period of 11,000 years, found that Turkish people carry the genetic legacy of "both ancient people who lived in Anatolia for thousands of years covered by our study and people coming from Central Asia bearing ...
11 minutes ago · Members of the Armenian-American Census Coalition gather at the Carousel a Lebanese-Armenian restaurant for a working lunch in Glendale, Calif. on Friday, May 17, 2024. For some race and ethnic groups, how the U.S. government categorizes them for crucial surveys and the once-a-decade census is still falling short.
13 hours ago · 53.4 m (175 ft) (1960) [3] The Aral Sea ( / ˈærəl /) [4] [a] was an endorheic lake lying between Kazakhstan to its north and Uzbekistan to its south which began shrinking in the 1960s and largely dried up by the 2010s. It was in the Aktobe and Kyzylorda regions of Kazakhstan and the Karakalpakstan autonomous region of Uzbekistan.
13 hours ago · Niacin, also known as nicotinic acid, is an organic compound and a vitamer of vitamin B 3, an essential human nutrient. [3] It is produced by plants and animals from the amino acid tryptophan. [4] Niacin is obtained in the diet from a variety of whole and processed foods, with highest contents in fortified packaged foods, meat, poultry, red ...
