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Ed Bradley (1941–2006) was an American broadcast journalist best known for reporting with 60 Minutes and CBS News. Bradley started his television news career in 1971 as a stringer for CBS at the Paris Peace Accords. He won Alfred I. duPont and George Polk awards for his coverage of the Vietnam War and the Cambodian Civil War. Returning to the United States, he became CBS's first Black White House correspondent. Bradley joined 60 Minutes in 1981 and reported on more than 500 stories with the program during his career, the most of any of his colleagues. Known for his fashion sense and disarming demeanor, Bradley won numerous journalism awards for his reporting, which has been credited with prompting federal investigations into psychiatric hospitals, lowering the cost of drugs used to treat HIV/AIDS, and ensuring that the accused in the Duke lacrosse case received a fair trial. He died of lymphocytic leukemia in 2006. (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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July 5: Fifth of July in New York
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Cirsium palustre, the marsh thistle, is a herbaceous biennial (or often perennial) flowering plant in the family Asteraceae. It is native to Europe, where it is particularly common on damp ground such as marshes, wet fields, moorland and beside streams. In Canada and the northern United States it is an introduced species that has become invasive. It grows in dense thickets that can crowd out slower growing native plants. Cirsium palustre can reach up to 2 metres (7 ft) in height and features strong stems with few branches which are covered in small spines. In its first year the plant grows as a dense rosette and in subsequent years a candelabra of dark purple or occasionally white flowers, 10–20 millimetres (0.4–0.8 in) with purple-tipped bracts. In the northern hemisphere these are produced from June to September. The plant provides an important source of nectar for pollinators. This C. palustre flower was photographed in Niitvälja, Estonia. Photograph credit: Ivar Leidus Recently featured: George Washington - Ectophasia crassipennis - Canadian National Railway |
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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.