Search results
Results from the WOW.Com Content Network
Gadolinium is a chemical element; it has symbol Gd and atomic number 64. Gadolinium is a silvery-white metal when oxidation is removed. It is a malleable and ductile rare-earth element. Gadolinium reacts with atmospheric oxygen or moisture slowly to form a black coating. Gadolinium below its Curie point of 20 °C (68 °F) is ferromagnetic, with ...
Fields. Chemistry. Jean Charles Galissard de Marignac (24 April 1817 – 15 April 1894) was a Swiss chemist whose work with atomic weights suggested the possibility of isotopes and the packing fraction of nuclei. His study of the rare earth elements led to his discovery of ytterbium in 1878 and co-discovery of gadolinium in 1880. [1][2][3]
Windover Archeological Site. The Windover Archeological Site is a Middle Archaic (8,000 to 1,000 BC) archaeological site and National Historic Landmark in Brevard County near Titusville, Florida, United States on the central east coast of the state. Windover is a muck pond where skeletal remains of 168 individuals were found buried in the peat ...
Johan Gadolin (5 June 1760 – 15 August 1852) [1] was a Finnish chemist, physicist and mineralogist. Gadolin discovered a "new earth" containing the first rare-earth compound yttrium, which was later determined to be a chemical element. He is also considered the founder of Finnish chemistry research, as the second holder of the Chair of ...
Gadolinium (III) containing MRI contrast agents (often termed simply "gado" or "gad") are the most commonly used for enhancement of vessels in MR angiography or for brain tumor enhancement associated with the degradation of the blood–brain barrier (BBB). [3][4] Over 450 million doses have been administered worldwide from 1988 to 2017. [5]
Florida was under colonial rule by Spain from the 16th century to the 19th century, and briefly by Great Britain during the 18th century (1763–1783). Neither Spain nor Britain maintained a large military or civilian population. It became a territory of the United States in 1821.
History of Florida. St. Augustine, Florida, the oldest continuously occupied settlement of European origin in the continental United States, was founded in 1565 by Spanish admiral Pedro Menéndez de Avilés. The Spanish Crown issued an asiento to Menéndez, signed by King Philip II on March 20, 1565, granting him various titles, including that ...
Isotopes of gadolinium (64Gd) Naturally occurring gadolinium (64 Gd) is composed of 6 stable isotopes, 154 Gd, 155 Gd, 156 Gd, 157 Gd, 158 Gd and 160 Gd, and 1 radioisotope, 152 Gd, with 158 Gd being the most abundant (24.84% natural abundance). The predicted double beta decay of 160 Gd has never been observed; only a lower limit on its half ...