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Topic: Louis Harold Gray

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	Louis Harold Gray - Wikipedia, the free encyclopedia
		Louis Harold Gray (10 November 1905 - 9 July 1965) was a British physicist who worked mainly on the effects of radiation on biological systems, inventing the field of radiobiology as he went.
		Harold's mother was good with her hands and from her he learned to wallpaper, bake and sew; an aunt showed him how to make a bookshelf out of old wooden crates.
		Gray had to discontinue his research at Hammersmith Hospital in 1954 due to personal differences with the clinic directorship.2 He then returned to Mount Vernon Hospital in Northwood, where the world's first radiobiological institute was built according to his plans.
	en.wikipedia.org /wiki/Louis_Harold_Gray (1462 words)

	Louis Harold Gray (Site not responding. Last check: 2007-10-09)
		Louis Harold Grey obtained his PhD at the Cavendish Laboratory under Rutherford at a time when the laboratory was a world centre for fundamental research in nuclear physics.
		In a 1940 paper, Gray and Read employed their energy unit, "that amount of neutron radiation which produces an increment of energy in unit volume of tissue equal to the increment of energy produced in unit volume of water by one röntgen of radiation".
		Gray was Vice Chairman of the International Commission on Radiation Units and Measurements (ICRU) from 1956 to 1962, and assisted in the formation of the IARR.
	www.medphysics.ucla.edu /more_gray.htm (378 words)

	Gray (unit) - Wikipedia, the free encyclopedia
		The gray (symbol: Gy) is the SI unit of absorbed dose.
		To avoid any risk of confusion between the absorbed dose and the equivalent dose, one must use the corresponding special units, namely the gray instead of the joule per kilogram for absorbed dose and the sievert instead of the joule per kilogram for the dose equivalent.
		The Gray was defined in 1975 in honor of Louis Harold Gray (1905-1965), who used a similar concept, “that amount of neutron radiation which produces an increment of energy in unit volume of tissue equal to the increment of energy produced in unit volume of water by one röntgen of radiation,” in 1940.
	en.wikipedia.org /wiki/Gray_(unit) (328 words)

	Encyclopedia: Gray
		Gray or grey is a color created by mixing white and fl in different proportions.
		Gray (unit) the absorbed dose of radiation named after Louis Harold Gray.
		Gray's " Elegy Written in a Country Church-yard " (1751), written in the churchyard of Stoke Poges, Buckinghamshire, is considered as the representative poem of its age and was to become a lasting contribution to the English heritage.
	www.nationmaster.com /encyclopedia/Gray (336 words)

	gray : Definition from the Online Dictionary at Datasegment.com
		Gray mill or Gray millet (Bot.), a name of several plants of the genus Lithospermum; gromwell.
		Gray mullet (Zool.) any one of the numerous species of the genus Mugil, or family Mugilid[ae], found both in the Old World and America; as the European species (Mugilid[ae] capito, and Mugilid[ae] auratus), the American striped mullet (Mugilid[ae] albula), and the white or silver mullet (Mugilid[ae] Braziliensis).
		Gray whale (Zool.), a rather large and swift whale of the northern Pacific (Eschrichtius robustus, formerly Rhachianectes glaucus), having short jaws and no dorsal fin.
	onlinedictionary.datasegment.com /word/gray (441 words)

	Gray Definition / Gray Research (Site not responding. Last check: 2007-10-09)
		Gray or grey is a color created by mixing whiteWhite is a color (more accurately it contains all the colors of the spectrum and is sometimes described as an achromatic color—fl is the absence of color) that has high brightness but zero hue.
		Gray (unit) the absorbed dose of radiationRadiation generally means the transmission of waves, objects or information from a source into a surrounding medium or destination.
		Gray, France is a townA town is usually an urban area which is not considered to rank as a city.
	www.elresearch.com /Gray (780 words)

	Harold Gray Meers, 2000 Finalist, MET New England Region
		Harold Gray Meers, 2000 Finalist, MET New England Region
		Harold Gray Meers has performed a wide range of repertoire across the country, including the Young Collector in Andre Previn's, A Streetcar Named Desire with New Orleans Opera, 1st Jew in Salome with Glimmerglass Opera, and Don Ottavio in Don Giovanni with Opera North.
		Meers was heard at Boston Lyric Opera as Simonson Machover in Resurrection and Pedrillo in The Abduction from the Seraglio.
	www.neaudition.org /singers/meers.html (143 words)

	Encyclopedia: Louis Harold Gray
		Clinac 2100 C accelerator Radiation therapy (or radiotherapy) is the medical use of ionizing radiation as part of cancer treatment to control malignant cells (not to be confused with radiology, the use of radiation in medical imaging and diagnosis).
		The word gray is also spelled grey : see Grey for topics with this spelling.
		Gray or grey is a color created by mixing white and fl in different proportions.
	www.nationmaster.com /encyclopedia/Louis-Harold-Gray (2181 words)

	Gray Cancer Institute: LH Gray - Obituary (Site not responding. Last check: 2007-10-09)
		The urge to meet with his fellow men for their mutual benefit by discussion of matters of science was characteristic also of Hal Gray.
		The twentieth-century Gray (also a product of Trinity College, Cambridge) was reared in an age when the cult of specialisation for learning more and more about less and less was at its most fashionable.
		Gray and the few others of his ilk by some instinctive process foresaw that escape from this confinement depended on those with sufficient breadth of understanding somehow encompassing the new philosophies of the the twentieth century and synthesising the advances of physical, chemical and biological sciences into new concepts.
	www.gci.ac.uk /lab/history/lhgray/gray_obit.html (337 words)

	Louis Harold Gray
		Gray spoke to both public groups and scientific gatherings, and his lectures and publications range from technical scientific discussions to helpful talks for the layman.
		Gray's personal papers include correspondence with many of his now-famous colleagues and friends, such as Sir James Chadwick, discoverer of the neutron, and Ernest Rutherford, discoverer of the proton.
		It is awarded for outstanding contributions to basic or medical radiation science of interest to the ICRU and honors the late Louis Harold Gray, former member and Vice-Chairman of the Commission.
	indykfi.atomki.hu /indyKFI/MT/gray.htm (732 words)

	Radiobiology
		The gray replaces an earlier unit called the rad (an abbreviation for "radiation absorbed dose") which is equal to 0.01 Gy.
		The SI unit of absorbed dose is the gray [Gy].
		The gray and the sievert are each equal to a joule per kilogram, but they are not equal to each other.
	hypertextbook.com /physics/modern/radiobiology/index.shtml (2066 words)

	Gray
		Name for the unit of absobed dose, symbol: Gy.
		1 Gray = 1 joule divided by kilogram.
		The name has been chosen in memory of Louis Harold Gray (1905 to 1965) who contributed to the fundamental findings in radiation dosimetry.
	www.euronuclear.org /info/encyclopedia/g/gray.htm (48 words)

	Information on gray
		Gray A parser generator written in Forth by Martin Anton Ertl.
		Gray, GA -- U.S. city in Georgia Population (2000): 1811 Housing Units (2000): 713 Land area (2000): 2.418527 sq.
		Gray, IA -- U.S. city in Iowa Population (2000): 82 Housing Units (2000): 43 Land area (2000): 1.000854 sq.
	www.wkonline.com /d/gray.html (770 words)

	ICRU News (Site not responding. Last check: 2007-10-09)
		The Gray Medal was established by the ICRU in 1967.
		It is awarded for outstanding contributions to basic or applied radiation science of interest to the ICRU and honors the late Louis Harold Gray, former member and Vice-Chairman of the Commission.
		The ninth award of the ICRU Gray Medal will be made at the annual meeting of American Society of Therapeutic Radiology and Oncology (ASTRO) in San Francisco, November 2001.
	www.icru.org /n_001_6.htm (244 words)

	G - Glossary of chemical terms
		Gray (Gy) is the SI derived unit of absorbed dose of radiation.
		The gray is the absorbed dose when the energy per unit mass imparted to matter by ionizing radiation is one joule per kilogram (Gy = J/kg).
		The unit is named after the British scientist Louis Harold Gray (1905-1965).
	www.ktf-split.hr /periodni/en/abc/g.html (753 words)

	MS 0642: The L.H. Gray Papers, 1940-1970 (Site not responding. Last check: 2007-10-09)
		The papers of Louis Harold Gray (1905-1965) were purchased with federal assistance in January 1971 for the Archives of Radiation Biology.
		Louis Harold Gray (1905-1965) was an imminent English physicist and radiobiologist.
		During his career, Gray was recipient of numerous awards including election as a fellow in the Royal Society, an honorary member of the American Radium Society, and an honorary degree from Leeds University.
	www.lib.utk.edu /spcoll/manuscripts/ms0642fa.html (2863 words)

	Bookslut \| Louis Riel by Chester Brown
		The history of Louis Riel and of the Métis Rebellion is probably new to most non-Canadian readers.
		Much has been made of the artistic style that Chester Brown uses in Louis Riel, which is reminiscent of both Harold Gray’s work on Little Orphan Annie and of Herge’s Tintin (the former of which Brown acknowledges as his chief influence).
		It’s especially interesting to read Louis Riel after having previously read Osamu Tezuka’s Buddha -- a heavily fictionalized version of Siddhartha’s life, which can’t really be considered a “biography” even in the non-academic (though certainly scholarly) sense of Louis Riel.
	www.bookslut.com /comicbookslut/2004_04_001887.php (559 words)

	Harold Gray Medal - International Commission on Radiation Units and Measurements (ICRU) (Site not responding. Last check: 2007-10-09)
		Harold Gray Medal - International Commission on Radiation Units and Measurements (ICRU)
		Quoting the ICRU News: "The Gray Medal was established by the ICRU in 1967.
		It is 3 inches in diameter (you would have thought that the ICRU would use metric dimensions) and weighs 197 grams.
	www.orau.org /PTP/collection/medalsmementoes/haroldgraymedal.htm (132 words)

	BBC - h2g2 - The Measurement of Radioactivity
		The unit gray (Gy) is used to express the energy absorbed from a dose of radiation.
		Using our hapless boxer again, a gray would be analogous to a unit that measures whether the punch is a strong uppercut or just a little jab.
		Grays are also used to express a radiation "field" or area (such as, from a powerful x-ray machine, sometimes also called "shine") in Gy/h or Gy/min or even Gy/s.
	www.bbc.co.uk /dna/ww2/A2867457 (2790 words)

	Publications from the Gray Laboratory dated 1966 (Site not responding. Last check: 2007-10-09)
		Gray, L.H. and Boag, J.W. The inhibition of root growth by electron radiation.
		Hawes, C.A., Howard, A. and Gray, L.H. Induction of chromosome structural damage in Ehrlich ascites tumour cells.
		Hewitt, H.B. The effect on cell survival of inhalation of oxygen under high pressure during irradiation in vivo of a solid mouse sarcoma.
	www.graylab.ac.uk /lab/public/glpubs1966.html (173 words)

	Louis Harold Gray - Encyclopedia, History, Geography and Biography
		Louis Harold Gray - Encyclopedia, History, Geography and Biography
		This encyclopedia, history, geography and biography article about Louis Harold Gray contains research on
		Louis Harold Gray, Summary of Career, External links, 1905 births, 1965 deaths, British physicists and Radiobiologists.
	www.arikah.com /encyclopedia/Louis_Harold_Gray (289 words)

	Jeet Heer, "Dear Orphan Annie"
		A staunch believer in the virtues of unfettered free enterprise, Gray was happy to use his strip to attack those he regarded as leading the country down the road to communism.
		Gray's career coincided with the heyday of serial storytelling; appropriately, he wrapped his political message in suspenseful installments that drew audiences into a world of intrigue and danger.
		Gray's political messages were perhaps most direct during the presidency of Franklin Roosevelt.
	www.jeetheer.com /comics/dearannie.htm (2017 words)

	Gray (unit) - Encyclopedia, History, Geography and Biography
		This page was last modified 15:45, 5 December 2005.
		This encyclopedia, history, geography and biography article about Gray (unit) contains research on
		Gray (unit), Definition, SI multiples, Origin, Explanation, Conversions, SI derived units, Nuclear physics, Nuclear chemistry and Units of radiation dose.
	www.arikah.com /encyclopedia/Gray_%28unit%29 (362 words)

	Radiation Dosimetry (Site not responding. Last check: 2007-10-09)
		The ability of the radiation to deposit energy per unit mass of the target material is defined as the "radiation dose." It is expressed in grays, or Gy (in honor of Louis Harold Gray, 1905–1965, the British physician who was an authority on the use of radiation in the treatment of cancer).
		One gray equals 1 joule of deposited energy per kilogram of the target material.
		An older, similar unit, still in widespread use, is the rad (radiation absorbed dose), which is equal to 100 ergs per gram.
	www.aero.org /publications/crosslink/summer2003/03_sidebar1.html (285 words)

	IRPA - News (Site not responding. Last check: 2007-10-09)
		The ICRU initiated Gray Medal program in 1967 to honor Louis Harold Gray, former Vice-Chairman of the Commission, and to acknowledge the merits of a scientist who made an outstanding contribution in radiation science.
		The 10th Gray Medal will be awarded to Dr Michael Fry for his outstanding achievements in radiobiology and radiation protection, and his enthusiastic involvement in the management of the Radiation Research Journal.
		The 11th Gray Medal will be awarded to Dr Martin J. Berger for his remarkable and recognized contribution to the radiation transport theory and the leading role he has played in the field.
	www.irpa.net /news/arch/2002d.html (1748 words)

	Grey / Gray in The AnswerBank: Arts & Literature (Site not responding. Last check: 2007-10-09)
		Gray is a color, but grey is a colour...
		Gray, as in the British scientist, Louis Harold Gray, who has lent his name to the dose of radiation absorbed by food during processing.
		Abbreviated to (G) as in 1 Gray = 0.001kGy = 1 joule of energy absorbed by 1 kilogram of food irradiated.
	www.theanswerbank.co.uk /Arts_and_Literature/Question122265.html (371 words)

	Louis Harold Gray (Site not responding. Last check: 2007-10-09)
		Amongst many other achievements, he defined a unit of radiation dosage which was later namedafter him as an SI unit, the Gray.
		This discovery initiated an new direction for chemistry research that is still very active today and is vital forunderstanding of the effects of radiation on biological tissue, for instance in cancer treatment.
		Based in part on this slide and several subsequent and prior ones, withpermission.
	www.therfcc.org /louis-harold-gray-144620.html (231 words)

	Radiotherapy
		This Louis Harold Gray, F.R.S. was an interesting fellow.
		Gray went on to become president of the British Institute of Radiology, chairman of the British Units Committee, and was elected a Fellow of the Royal Society in 1961.
		The Gray Laboratory of the Cancer Research Trust carries on his name.
	polynation.pwp.blueyonder.co.uk /alan_gray/04.html (1101 words)

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