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13 ore fa · 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 ore fa · Within eight years 46,000 new beerhouses opened and, because operating costs were so low, huge profits were often made. The combination of increasing competition and high profits eventually led to what has been described as a golden age of pub building when many landlords extended or redeveloped their properties, adopting many features modern pubs still have.
13 ore fa · University of Michigan. / 42.27694°N 83.73806°W / 42.27694; -83.73806. The University of Michigan ( U-M, UMich, or simply Michigan) is a public research university in Ann Arbor, Michigan. Founded in 1817, it is the oldest institution of higher education in the state.
13 ore fa · A stained-glass panel from Canterbury Cathedral, c. 1175 – c. 1180. It depicts the Parable of the Sower, a biblical narrative. In the history of Europe, the Middle Ages or medieval period (also spelt mediaeval or mediæval) lasted from approximately 500 to 1500 AD, although some prefer other start and end dates. The Middle Ages is the second of the three traditional divisions of Western ...
