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Nicholas of Worcester (died 1124) was the prior of the Benedictine priory of Worcester Cathedral (crypt pictured) from about 1115 until his death. He was born around the time of the Norman Conquest. It is not known who his parents were, but William of Malmesbury wrote that he was "of exalted descent", and it has been argued that he was a son of King Harold Godwinson. Nicholas was the favourite pupil of Wulfstan, the bishop of Worcester, who brought him up. Wulfstan was influential in transmitting Old English culture to Anglo-Norman England, and Nicholas carried on this work as prior. He was respected by the chroniclers William of Malmesbury, John of Worcester and Eadmer for his assistance with their histories. Nicholas was an English monk at a time when both Englishmen and monks rarely received promotion in the church, and when Bishop Theulf of Worcester died in October 1123, Nicholas led an unsuccessful attempt of the monks of the priory chapter to be allowed to choose the next bishop. (Full article...)
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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...) Recently highlighted: Two-level utilitarianism – Islamic view of Ezra – Weapon dance |
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May 28: Republic Day in Armenia (1918); Independence Day in Azerbaijan (1918)
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Acraea terpsicore, commonly known as the tawny coster, is a species of butterfly in the Nymphalidae family, the brush-footed butterflies. It is found across eastern Asia from India and Sri Lanka to Singapore, Indonesia and the Maldives and, more recently, Australia. It is small, with a size of 53–64 millimetres (2.1–2.5 in), has leathery wings and is common in grassland and scrub habitats. Acraea terpsicore has a weak fluttery flight and is avoided by most insect predators. This A. terpsicore individual was photographed in Komodo National Park, Indonesia. Photograph credit: Charles J. Sharp Recently featured: Wheat Fields - Giechburg - Plains-wanderer |
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- ^ Proline is an exception to this general formula. It lacks the NH2 group because of the cyclization of the side chain.