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The School of Athens (Italian: Scuola di Atene) is a fresco by the Italian Renaissance artist Raphael. It was painted between 1509 and 1511 as part of a commission by Pope Julius II to decorate the rooms now called the Stanze di Raffaello in the Apostolic Palace in Vatican City .
The School of Athens or "Scuola di Atene" in Italian is one of the most famous paintings by the Italian Renaissance artist Raphael. It was painted between 1509 and 1510 as a part of Raphael's commission to decorate with frescoes the rooms that are now known as the Stanze di Raffaello , in the Apostolic Palace in the Vatican .
The black mamba (Dendroaspis polylepis) is a species of highly venomous snake belonging to the family Elapidae.It is native to parts of sub-Saharan Africa.First formally described by Albert Günther in 1864, it is the second-longest venomous snake after the king cobra; mature specimens generally exceed 2 m (6 ft 7 in) and commonly grow to 3 m (9.8 ft).
A mamba may retain the same lair for years. Resembling a cobra, the threat display of a mamba includes rearing, opening the mouth and hissing. The black mamba's mouth is black within, which renders the threat more conspicuous. A rearing mamba has a narrower yet longer hood and tends to lean well forward, instead of standing erect as a cobra does.
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A single dendrotoxin molecule associates reversibly with a potassium channel in order to exert its inhibitory effect. It is proposed that this interaction is mediated by electrostatic interactions between the positively charged amino acid residues in the cationic domain of dendrotoxin and the negatively charged residues in the ion channel pore.
The school was closed for a year (306 BCE) when all foreign philosophers were required to leave Athens. It seems to have gone into decline from c. 300, and to have more or less disintegrated sometime after 225 BCE when its last certain scholar, Lyco of Troas , died and left the Lyceum not to one man but to all his colleagues.
Jameson's mamba (Dendroaspis jamesoni) is a species of highly venomous snake in the family Elapidae. The species is native to equatorial Africa . A member of the mamba genus , Dendroaspis , it is slender with dull green upper parts and cream underparts and generally ranges from 1.5 to 2.2 m (4.9 to 7.2 ft) in total length.