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1 天前 · The Wizard of Oz is a 1939 American musical fantasy film produced by Metro-Goldwyn-Mayer (MGM). An adaptation of L. Frank Baum's 1900 children's fantasy novel The Wonderful Wizard of Oz, it was primarily directed by Victor Fleming, who left production to take over the troubled Gone with the Wind. It stars Judy Garland, Frank Morgan, Ray Bolger ...
3 天前 · A protein is a polyamide. Secondary structure: regularly repeating local structures stabilized by hydrogen bonds. The most common examples are the α-helix, β-sheet and turns. Because secondary structures are local, many regions of different secondary structure can be present in the same protein molecule.
3 天前 · Galileo di Vincenzo Bonaiuti de' Galilei (15 February 1564 – 8 January 1642), commonly referred to as Galileo Galilei (/ ˌ ɡ æ l ɪ ˈ l eɪ oʊ ˌ ɡ æ l ɪ ˈ l eɪ / GAL-il-AY-oh GAL-il-AY, US also / ˌ ɡ æ l ɪ ˈ l iː oʊ-/ GAL-il-EE-oh - , Italian: [ɡaliˈlɛːo ɡaliˈlɛːi]) or simply Galileo, was an Italian astronomer, physicist and engineer, sometimes described as a polymath.
1 天前 · The 2024 ATP Tour is the global elite men's professional tennis circuit organized by the Association of Tennis Professionals (ATP) for the 2024 tennis season. The 2024 ATP Tour calendar comprises the Grand Slam tournaments, supervised by the International Tennis Federation (ITF), the ATP Finals, the ATP Masters 1000, the United Cup (organized with the WTA), the ATP 500 series and the ATP 250 ...
3 天前 · CRISPR (/ ˈ k r ɪ s p ər /) (an acronym for clustered regularly interspaced short palindromic repeats) is a family of DNA sequences found in the genomes of prokaryotic organisms such as bacteria and archaea. These sequences are derived from DNA fragments of bacteriophages that had previously infected the prokaryote. ...
2 天前 · Lyndon Baines Johnson (/ ˈ l ɪ n d ə n ˈ b eɪ n z /; August 27, 1908 – January 22, 1973), often referred to by his initials LBJ, was an American politician who served as the 36th president of the United States from 1963 to 1969. He became president after the assassination of John F. Kennedy, under whom he had served as the 37th vice president from 1961 to 1963.
2 天前 · The crucifixion of Jesus was the execution by crucifixion of Jesus of Nazareth in 1st-century Judaea, most likely in AD 30 or AD 33.It is described in the four canonical gospels, referred to in the New Testament epistles, attested to by other ancient sources, and is broadly accepted as one of the events most likely to have occurred during his life.
