|
McClure Radioactive Site
The McClure radioactive site was a radioactive site in Scarborough, Toronto. It was discovered in 1980 at a housing development built by the Ontario Housing Corporation on McClure Crescent in the Malvern neighbourhood. It was contaminated with radium from a previous industrial use. Background McClure Crescent is a residential street in Malvern (near the intersection of ( Neilson Road and Sheppard Avenue) where the contaminated soil was discovered. In the 1940s, Radium Luminous Industries was a company that operated a plant on the same site. The plant extracted radium from scrap metal to be used for experiments in accelerated plant growth. The experiments ultimately proved unsuccessful and the company shut down operations. However, the soil on the site of the plant was radioactively contaminated.Richard Schofield, Meredyth Schofield, Karen Whynot. 1996. Scarboro: Then and Now. Scarborough Board of Education, Scarborough Historical Society. p. 72. In the 1970s, the Ontario provincial ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scarborough, Toronto
Scarborough (; 2021 Canadian census, 2021 Census 629,941) is a district of Toronto, Ontario, Canada. It is situated atop the Scarborough Bluffs in the eastern part of the city. Its borders are Victoria Park Avenue to the west, Steeles Avenue (Toronto), Steeles Avenue to the north, Rouge River (Ontario), Rouge River and the city of Pickering, Ontario, Pickering to the east, and Lake Ontario to the south. It borders Old Toronto, East York and North York in the west and the city of Markham, Ontario, Markham in the north. Scarborough was named after the English town of Scarborough, North Yorkshire. Scarborough, which was settled by Europeans in the 1790s, has grown from a collection of small rural villages and farms to become fully urbanized with a diverse cultural community. Incorporated in 1850 as a township, Scarborough became part of Metropolitan Toronto in 1953 and was reconstituted as a borough in 1967. Scarborough rapidly developed as a suburb of Toronto over the next decade ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Toronto
Toronto ( ; or ) is the capital city of the Canadian province of Ontario. With a recorded population of 2,794,356 in 2021, it is the most populous city in Canada and the fourth most populous city in North America. The city is the anchor of the Golden Horseshoe, an urban agglomeration of 9,765,188 people (as of 2021) surrounding the western end of Lake Ontario, while the Greater Toronto Area proper had a 2021 population of 6,712,341. Toronto is an international centre of business, finance, arts, sports and culture, and is recognized as one of the most multicultural and cosmopolitan cities in the world. Indigenous peoples have travelled through and inhabited the Toronto area, located on a broad sloping plateau interspersed with rivers, deep ravines, and urban forest, for more than 10,000 years. After the broadly disputed Toronto Purchase, when the Mississauga surrendered the area to the British Crown, the British established the town of York in 1793 and later designat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Malvern, Toronto
Malvern is a neighbourhood in the city of Toronto, Ontario, Canada, with a population of 44,315. It is located in the northeast corner of the city. There are over 60 different cultures represented in Malvern, with the most dominant ethnic groups being Caribbean Canadians (mostly Jamaican, Trinidadian, and Guyanese) and South Asian Canadians (mostly Sri Lankan Tamil, Indian and Pakistani). The neighbourhood has the highest concentration of young people in Canada. History The history of Malvern began in 1856, when the Malvern Post Office was opened in David Brown's general store, which stood at the south-east corner of Finch Avenue and Markham Road. This post office was named after a resort town in England. A year after the post office was opened, Senator David Reesor — formerly of Markham Village — began selling "Village Lots" in Malvern. Reesor trumpeted Malvern as the future "Capital of Scarborough," anticipating that the Grand Trunk Railway would extend a branch ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radium
Radium is a chemical element with the symbol Ra and atomic number 88. It is the sixth element in group 2 of the periodic table, also known as the alkaline earth metals. Pure radium is silvery-white, but it readily reacts with nitrogen (rather than oxygen) upon exposure to air, forming a black surface layer of radium nitride (Ra3N2). All isotopes of radium are radioactive, the most stable isotope being radium-226 with a half-life of 1600 years. When radium decays, it emits ionizing radiation as a by-product, which can excite fluorescent chemicals and cause radioluminescence. Radium, in the form of radium chloride, was discovered by Marie and Pierre Curie in 1898 from ore mined at Jáchymov. They extracted the radium compound from uraninite and published the discovery at the French Academy of Sciences five days later. Radium was isolated in its metallic state by Marie Curie and André-Louis Debierne through the electrolysis of radium chloride in 1911. In nature, radium is found ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of North–south Roads In Toronto
The following is a list of the north–south expressways and arterial thoroughfares in the city of Toronto, Ontario, Canada. The city is organized in a grid pattern dating back to the plan laid out by Augustus Jones between 1793 and 1797. Most streets are aligned in the north–south or east–west direction, based on the shoreline of Lake Ontario. In other words, major north–south roads are generally perpendicular to the Lake Ontario shoreline and major east–west roads are generally parallel to the lake's shoreline. The Toronto road system is also influenced by its topography as some roads are aligned with the old Lake Iroquois shoreline, or the deep valleys. Minor streets with documented history or etymology are listed in a separate section. Expressways Allen Road William R. Allen Road, known more commonly as Allen Road, The Allen Expressway and The Allen, is a short expressway that travels from Eglinton Avenue West in the south to Kennard Avenue in the north. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sheppard Avenue
Sheppard Avenue is an east–west principal arterial road in Toronto, Ontario, Canada. The street has two distinct branches near its eastern end, with the original route being a collector road leading to Pickering via a turnoff, and the main route following a later-built roadway which runs south to Kingston Road. To avoid name duplication, the Toronto portion of the northern branch was renamed Twyn Rivers Drive. The section of the street entirely in Toronto is (34.2 km) in length, while the Pickering section and Twyn Rivers Dr. is (5.4 km) long. History Sheppard is named for Joseph Shepard I, who acquired of land at the northwest corner of Sheppard and Yonge Street. His son opened a general store there. The site was occupied in 1860 by the Dempsey Hardware Store, which was later moved and restored as a museum. In the mid-2010s, a commercial building was constructed on the original site. Sheppard was a sideroad between lots 15 and 16 York Township In the former S ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chalk River, Ontario
Chalk River (2016 population: 1029) is a small rural village, part of the Laurentian Hills municipality in Renfrew County, Ontario, Canada. It is located in the Upper Ottawa Valley along Highway 17 (Trans-Canada Highway), inland (west) from the Ottawa River, approximately northwest of Petawawa, and northwest of Ottawa. Chalk River was a separate municipality until January 1, 2000, when the United Townships of Rolph, Buchanan, Wylie and McKay and the Village of Chalk River were merged. Chalk River's area is environmentally pristine with extensive forests, hills and numerous small lakes, all of which support a variety of wildlife typical to the southern edge of the Canadian Shield. St. Anthony's Elementary School is the only educational institution in the community, instructing grades Junior Kindergarten to Grade 8. It provides Catholic education to the children in the neighbourhood, with a church next door. Students in higher grades are bussed to nearby Deep River. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gamma Radiation
A gamma ray, also known as gamma radiation (symbol γ or \gamma), is a penetrating form of electromagnetic radiation arising from the radioactive decay of atomic nuclei. It consists of the shortest wavelength electromagnetic waves, typically shorter than those of X-rays. With frequencies above 30 exahertz (), it imparts the highest photon energy. Paul Villard, a French chemist and physicist, discovered gamma radiation in 1900 while studying radiation emitted by radium. In 1903, Ernest Rutherford named this radiation ''gamma rays'' based on their relatively strong penetration of matter; in 1900 he had already named two less penetrating types of decay radiation (discovered by Henri Becquerel) alpha rays and beta rays in ascending order of penetrating power. Gamma rays from radioactive decay are in the energy range from a few kiloelectronvolts (keV) to approximately 8 megaelectronvolts (MeV), corresponding to the typical energy levels in nuclei with reasonably long lifeti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sievert
The sievert (symbol: SvNot be confused with the sverdrup or the svedberg, two non-SI units that sometimes use the same symbol.) is a unit in the International System of Units (SI) intended to represent the stochastic health risk of ionizing radiation, which is defined as the probability of causing radiation-induced cancer and genetic damage. The sievert is important in dosimetry and radiation protection. It is named after Rolf Maximilian Sievert, a Swedish medical physicist renowned for work on radiation dose measurement and research into the biological effects of radiation. The sievert is used for radiation dose quantities such as equivalent dose and effective dose (radiation), effective dose, which represent the risk of external radiation from sources outside the body, and committed dose, which represents the risk of internal irradiation due to inhaled or ingested radioactive substances. According to the International Commission on Radiological Protection (ICRP) one sievert r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
History Of Toronto
Toronto was founded as the Town of York and capital of Upper Canada in 1793 after the Mississaugas surrendered the land to the British in the Toronto Purchase. For over 12,000 years, Indigenous People have lived in the Toronto area. The ancestors of the Huron-Wendat were the first known groups to establish agricultural villages in the area about 1,600 years ago. In the 17th century, the Toronto Carrying-Place Trail along the Humber River became a strategic site for controlling the fur trade farther north. The Seneca people established a village of about 2,000 people known as Teiaiagon along the trail. The French set up trading posts in the area, including Fort Rouillé in 1751, which they abandoned as the British conquered French North America in the Seven Years' War. In the 1790s the British began to settle Toronto and built the garrison which became Fort York at the entrance to Toronto Harbour. The Americans attacked the village and garrison during the War of 1812. In t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radioactive Waste
Radioactive waste is a type of hazardous waste that contains radioactive material. Radioactive waste is a result of many activities, including nuclear medicine, nuclear research, nuclear power generation, rare-earth mining, and nuclear weapons reprocessing. The storage and disposal of radioactive waste is regulated by government agencies in order to protect human health and the environment. Radioactive waste is broadly classified into low-level waste (LLW), such as paper, rags, tools, clothing, which contain small amounts of mostly short-lived radioactivity, intermediate-level waste (ILW), which contains higher amounts of radioactivity and requires some shielding, and high-level waste (HLW), which is highly radioactive and hot due to decay heat, so requires cooling and shielding. In nuclear reprocessing plants about 96% of spent nuclear fuel is recycled back into uranium-based and mixed-oxide (MOX) fuels. The residual 4% is minor actinides and fission products the latter of w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radioactively Contaminated Areas
Radioactive describes something undergoing radioactive decay, the process by which an unstable atomic nucleus emits radiation. Radioactive may also refer to: Materials *Naturally occurring radioactive material *Nuclear pharmacy, the preparation of radioactive materials for nuclear medicine *Radioactive contamination *Radioactive waste Entertainment * ''Radioactive'' (Yelawolf album), a 2011 album by rapper Yelawolf * "Radioactive" (Gene Simmons song), a song from the 1978 album ''Gene Simmons'' by Gene Simmons *'' Radio:Active'' the fourth album from British pop rock group McFly * "Radioactive" (The Firm song), a song from the 1985 album ''The Firm'' by the English supergroup The Firm * "Radioactive" (Imagine Dragons song), a 2012 song by Imagine Dragons * "Radioactive" (Kings of Leon song), a 2010 song by Kings of Leon * "Radioactive" (Marina and the Diamonds song), a 2011 song by Marina and the Diamonds * "Radioactive" (Rita Ora song), a 2013 song by Rita Ora *Radioactive Recor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
.svg "Click for more on -> Radium")
