2 days ago · Isabella was born in Madrigal de las Altas Torres, Ávila, to John II of Castile and his second wife, Isabella of Portugal on 22 April 1451. At the time of her birth, she was second in line to the throne after her older half-brother Henry IV of Castile . 
Aug 01, 2020 · Flortaucipir (18 F) is a radioactive diagnostic agent for adults with cognitive impairment who are being evaluated for Alzheimer's disease. It is indicated for positron emission tomography (PET) imaging of the brain to estimate the density and distribution of aggregated tau neurofibrillary tangles (NFTs), a primary marker of Alzheimer's disease.
2 days ago · Christopher Columbus (1451–1506) was a Genoese trader, explorer, and navigator. He was born in Genoa, Italy, in the year 1451. "Christopher Columbus" is the English version of Columbus's name. His real name in Italian was Cristoforo Colombo. In 1492 Columbus landed on an island of the Bahamas, the first European to do so. His initial goal was ...
3 days ago · The migration waves of Byzantine scholars and émigrés in the period following the sacking of Constantinople and the fall of Constantinople in 1453 is considered by many scholars key to the revival of Greek and Roman studies that led to the development of the Renaissance humanism [dead link] [better source needed] and science. These émigrés ...
- 6 April – 29 May 1453 (53 days)
- Decisive Ottoman victory, fall of the Byzantine Empire
- Constantinople (present-day Istanbul)41°01′00″N 28°58′37″E / 41.0167°N 28.9769°ECoordinates: 41°01′00″N 28°58′37″E / 41.0167°N 28.9769°E
- Ottoman Empire annexes the remaining Byzantine territories; Constantinople becomes its new capital, The Morea and Trebizond continue as Byzantine rump states, until their conquest in 1460 and 1461 respectively
2 days ago · The zodiac is found in medieval stained glass as at Angers Cathedral, where the master glassmaker, André Robin, made the ornate rosettes for the North and South transepts after the fire there in 1451. Mughal king Jahangir issued an attractive series of coins in gold and silver depicting the twelve signs of the Zodiac. Early modern
2 days ago · On average a coronavirus particle has 74 surface spikes. A subset of coronaviruses (specifically the members of betacoronavirus subgroup A) also have a shorter spike-like surface protein called hemagglutinin esterase (HE). The coronavirus surface spikes are homotrimers of the S protein, which is composed of an S1 and S2 subunit.
5 days ago · 洛迪王朝（1451年－1526年）是德里蘇丹國第五個王朝，其創建者為普什图人 巴赫魯爾·洛迪。 巴赫魯爾·洛迪原為賽義德王朝錫林德總督。1451年，巴赫魯爾奪取了德里，建立洛迪王朝。王朝共歷3代蘇丹，管轄範圍包括今旁遮普、北方邦等地區。
2 days ago · 1451 - 1453と組で48番目の双子素数、ソフィー・ジェルマン素数; 1454 = 21 2 + 22 2 + 23 2; 1458 = 2 1 × 3 6 = 2 × 729; 1460 = 4 × 365 と表せるため閏年を含まないときの4年間の日数; 1461 - 閏年を含めたときの4年間の日数; 1463 = 11 1 + 11 2 + 11 3; 1464 = 11 0 + 11 1 + 11 2 + 11 3; 1469 - 八 ...
5 days ago · През 1451 г. то е тимар с 64 домакинства, а данъкът за бея е бил 4685 акчета. През xvi в. тук е имало 3 джелепкешани, които доставяли 150 овце.
2 days ago · Wikipedia®和维基百科标志是维基媒体基金会的注册商标；维基™是维基媒体基金会的商标。 维基媒体基金会是按美国国內稅收法501(c)(3)登记的 非营利慈善机构 。