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SMS Lothringen

SMS Lothringen was the last of five pre-dreadnought battleships of the Braunschweig class built for the Imperial German Navy. Launched in May 1904, she was named for the then-German province of Lothringen. The ship was armed with a battery of four 28 cm (11 in) guns and had a top speed of 18 knots (33 km/h; 21 mph). She was to be replaced in July 1914 by dreadnought battleships but World War I prevented her retirement. The ship and the rest of II Squadron joined the dreadnoughts of the High Seas Fleet to support a raid on Scarborough, Hartlepool, and Whitby in December 1914. She primarily served as a guard ship in the German Bight; in poor condition by 1916, she was withdrawn from fleet service in February. She thereafter patrolled the Danish straits until replaced by the battleship Hannover in September 1917. After the war, she was converted into a depot ship for F-type minesweepers and placed in reserve in March 1920. (This article is part of a featured topic: Battleships of Germany.)

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In chemistry, an amino acid is a molecule containing both amine and carboxyl functional groups. In biochemistry, this term refers to alpha-amino acids with the general formula H2NCHRCOOH, where R is an organic substituent.[1] In the alpha amino acids, the amino and carboxylate groups are attached to the same carbon, which is called the α–carbon. The various alpha amino acids differ in which side chain (R group) is attached to their alpha carbon. They can vary in size from just a hydrogen atom in glycine through a methyl group in alanine to a large heterocyclic group in tryptophan.

Beyond the amino acids that are found in all forms of life, many non-natural amino acids have vital roles in technology and industry. For example, the chelating agents EDTA and nitrilotriacetic acid are alpha amino acids that are important in the chemical industry. (more...)

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Wheat Fields

Wheat Fields is a series of dozens of paintings by Dutch artist Vincent van Gogh. The close association of peasants and the cycles of nature particularly interested Van Gogh, such as the sowing of seeds, harvest and sheaves of wheat in the fields. Van Gogh saw ploughing, sowing and harvesting as symbolic to man's efforts to overwhelm the cycles of nature. This oil-on-canvas Wheat Fields painting, also sometimes known as Wheat Field with Alpilles Foothills in the Background, was created in June 1888 and is now in the Van Gogh Museum in Amsterdam.

Painting credit: Vincent van Gogh

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  1. ^ Proline is an exception to this general formula. It lacks the NH2 group because of the cyclization of the side chain.