XRAYS

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• X-ray — [ 22 December 1895 and presented to Professor Ludwig Zehnder of the Physik Institut, University of Freiburg, on 1 January 1896. The dark oval on the third finger is a shadow produced by her ring. [cite book last = Kevles first =Bettyann Holtzmann …   Wikipedia

• X-ray astronomy — X rays start at 0.008 nm and extend across the electromagnetic spectrum to 8 nm, over which the Earth s atmosphere is opaque. X ray astronomy is an observational branch of astronomy which deals with the study of X ray observation and detection… …   Wikipedia

• Wilhelm Conrad Röntgen — Infobox Scientist name = Wilhelm Röntgen box width = 300px image width = 220px caption = Wilhelm Conrad Röntgen birth date = birth date|1845|3|27|df=y birth place = Lennep, Prussia death date = Death date and age|df=yes|1923|2|10|1845|3|27 death… …   Wikipedia

• Gray (unit) — The gray (symbol: Gy) is the SI unit of absorbed radiation dose of ionizing radiation (for example, X rays), and is defined as the absorption of one joule of ionizing radiation by one kilogram of matter (usually human tissue).[1] Named after the… …   Wikipedia

• Gravity Kills — For the album by this group, see Gravity Kills (album). Gravity Kills Gravity Kills, 1995 Background information Origin St. Louis, Missouri …   Wikipedia

• French Bulldog — Infobox Dogbreed akcgroup = Non sporting akcstd = http://www.akc.org/breeds/french bulldog/index.cfm altname = Bouledogue Français ankcgroup = Group 7 (Non Sporting) ankcstd = http://www.ankc.aust.com/french.html ckcgroup = Group 6 Non Sporting… …   Wikipedia

• Blink comparator — A blink comparator was a viewing apparatus used by astronomers to find differences between two photographs of the night sky shot using optical telescopes such as astrographs. It permitted rapidly switching from viewing one photograph to viewing… …   Wikipedia

• ASTRO-E — and ASTRO EII (or Astro E2) are Japanese X ray astronomy satellites built primarily by JAXA. In 2000 the Astro E launch failed (with the satellite falling into the ocean), so a replacement called Astro EII was launched on July 10, 2005. Astro EII …   Wikipedia

• Nonunion — also means a workforce that does not belong to a trade union. Nonunion is permanent failure of healing following a broken bone. Nonunion is a serious complication of a fracture and may occur when the fracture moves too much, has a poor blood… …   Wikipedia

• Joint replacement — is one of the most common and successful operations in modern orthopaedic surgery. It consists of replacing painful, arthritic, worn or cancerous parts of the joint with artificial surfaces shaped in such a way as to allow joint… …   Wikipedia