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Persian Immortals The " Immortals " (from the Greek Ἀθάνατοι , sometimes "Ten Thousand Immortals" or "Persian Immortals") was the name given by Herodotus to an elite force of soldiers who fought for the Achaemenid Empire . This force performed the dual roles of both Imperial Guard and standing army during the Persian Empire's expansion and during the Greco-Persian Wars . Its Persian name may have been Anûšiya ('companions'). [ 1 ] Herodotus describes the 'Immortals' as being heavy infantry led by Hydarnes that were kept constantly at a strength of exactly 10,000 men. He claimed that the unit's name stemmed from the custom that every killed, seriously wounded or sick member was immediately replaced with a new one, maintaining the numbers and cohesion of the unit. [ 2 ]
Amadeus is a play by Peter Shaffer , which gives a highly fictionalized account of the lives of the composers Wolfgang Amadeus Mozart and Antonio Salieri . First performed in 1979, Amadeus was inspired by a short 1830 play by Alexander Pushkin called Mozart and Salieri (which was also used as the libretto for an opera of the same name by Nikolai Rimsky-Korsakov in 1897). In the play, significant use is made of the music of Mozart, Salieri and other composers of the period. The premieres of Mozart's operas The Abduction from the Seraglio , The Marriage of Figaro , Don Giovanni , and The Magic Flute are each the setting for key scenes of the play.
The seven deadly sins , also known as the capital vices or cardinal sins , is a classification of objectionable vices (part of Christian ethics ) that have been used since early Christian times to educate and instruct Christians concerning fallen humanity's tendency to sin . The currently recognized version of the sins are usually given as wrath , greed , sloth , pride , lust , envy , and gluttony . The Roman Catholic Church divides sin into two categories: venial sins , in which guilt is relatively minor, and the more severe mortal sins . Theologically, a mortal or deadly sin is believed to destroy the life of grace and charity within a person and thus creates the threat of eternal damnation .
The general structure of an ether Ethers ( pron.: / ˈ iː θ ər / ) are a class of organic compounds that contain an ether group — an oxygen atom connected to two alkyl or aryl groups — of general formula R–O–R'. [ 1 ] A typical example is the solvent and anesthetic diethyl ether , commonly referred to simply as "ether" (CH 3 -CH 2 -O-CH 2 -CH 3 ). Ethers are common in organic chemistry and pervasive in biochemistry, as they are common linkages in carbohydrates and lignin . [ edit ] Structure and bonding Ethers feature C-O-C linkage defined by a bond angle of about 104.5° and C-O distances of about 140 pm.
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