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Samuel Epstein (geochemist)
Samuel Epstein (December 9, 1919 – September 17, 2001) was a Canadian-American geochemist who developed methods for reconstructing geologic temperature records using stable isotope geochemistry. He was elected to the United States National Academy of Sciences in 1977, and a fellow of the Royal Society of Canada in 1997. Early years Sam Epstein was born in Kobryn, Belarus, then part of Poland, and as a child his family emigrated to Winnipeg, Manitoba. After receiving a B.Sc. in Geology and Chemistry (1941) and a M.Sc. in Chemistry (1942) from the University of Manitoba, Epstein completed his Ph.D. at McGill University under the supervision of Carl A. Winkler in 1944. His thesis focused on the synthesis and reaction kinetics of high explosives, including RDX and HMX. Epstein subsequently worked for the Canadian Atomic Energy Project for several years. Career In 1947, Epstein moved to the United States to begin a research fellowship with Harold Urey's group at the Univer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kobryn
Kobryn ( be, Кобрын; russian: Кобрин; pl, Kobryń; lt, Kobrynas; uk, Кобринь, Kobryn'; yi, קאָברין) is a city in the Brest Region of Belarus and the center of the Kobryn District. The city is located in the southwestern corner of Belarus, where the Mukhavets River and Dnepr-Bug Canal meet. The city lies about 52 km east of the city of Brest. Kobryn is located at Latitude 52.12.58N and Longitude 24.21.59E. It is at an altitude of 485 feet. It is a station on the Brest – Homiel railway line. As of 1995, the population was around 51,500. Sometimes the name of the city is written as ''Kobrin'' which is a transliteration from Russian. History In the early times, it was inhabited by the ancient Baltic Yotvingian tribe. At various times, the city belonged to Kingdom of Galicia–Volhynia, the Grand Duchy of Lithuania, the Polish–Lithuanian Commonwealth, the Russian Empire, the Second Polish Republic, the Byelorussian SSR, and the Republic of Bel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Canadians
Canadians (french: Canadiens) are people identified with the country of Canada. This connection may be residential, legal, historical or cultural. For most Canadians, many (or all) of these connections exist and are collectively the source of their being ''Canadian''. Canada is a multilingual and Multiculturalism, multicultural society home to people of groups of many different ethnic, religious, and national origins, with the majority of the population made up of Old World Immigration to Canada, immigrants and their descendants. Following the initial period of New France, French and then the much larger British colonization of the Americas, British colonization, different waves (or peaks) of immigration and settlement of non-indigenous peoples took place over the course of nearly two centuries and continue today. Elements of Indigenous, French, British, and more recent immigrant customs, languages, and religions have combined to form the culture of Canada, and thus a Canadian ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Isotopes Of Oxygen
There are three known stable isotopes of oxygen (8O): , , and . Radioactive isotopes ranging from to have also been characterized, all short-lived. The longest-lived radioisotope is with a half-life of , while the shortest-lived isotope is with a half-life of (though the half-lives of the neutron-unbound and are still unknown). List of isotopes , - , , style="text-align:right" , 8 , style="text-align:right" , 3 , , [] , proton emission, 2p , , (3/2−) , , , - , , style="text-align:right" , 8 , style="text-align:right" , 4 , , , 2p , , 0+ , , , - , rowspan=2, , rowspan=2 style="text-align:right" , 8 , rowspan=2 style="text-align:right" , 5 , rowspan=2, , rowspan=2, , β+ () , , rowspan=2, (3/2−) , rowspan=2, , rowspan=2, , - , β+p () , , - , , style="text-align:right" , 8 , style="text-align:right" , 6 , , , β+ , , 0+ , , , - , , style="text-align:right" , 8 , style="text-align:right" , 7 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heinz A
The H. J. Heinz Company is an American food processing company headquartered at One PPG Place in Pittsburgh, Pennsylvania. The company was founded by Henry J. Heinz in 1869. Heinz manufactures thousands of food products in plants on six continents, and markets these products in more than 200 countries and territories. The company claims to have 150 number-one or number-two brands worldwide. Heinz ranked first in ketchup in the US with a market share in excess of 50%; the Ore-Ida label held 46% of the frozen potato sector in 2003. Since 1896, the company has used its " 57 Varieties" slogan; it was inspired by a sign advertising 21 styles of shoes, and Henry Heinz chose the number 57 even though the company manufactured more than 60 products at the time, because "5" was his lucky number and "7" was his wife's. In February 2013, Heinz agreed to be purchased by Berkshire Hathaway and the Brazilian investment firm 3G Capital for $23billion. On March 25, 2015, Kraft announced its ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ralph Buchsbaum
Ralph Morris Buchsbaum (January 2, 1907 – February 11, 2002) was an American zoologist, invertebrate biologist, and ecologist. His book ''Animals Without Backbones'', first published in 1938, was the first textbook in biology to be reviewed by ''Time'' and featured in ''Life''.. It has gone through several revisions . and is still in print, and has been widely used as a textbook. It was still being used as of 2013.Z250 Readings Due to his 1938 book, Buchsbaum became known as a popularizer of science. In 1952 he founded the Boxwood Press, which published his own and others' science books. He also made a series of 29 educational films on biology for the Encyclopædia Britannica, and visited Thailand, Ecuador, Ghana, and India, where he helped develop educational curricula in biology. Personal life and career Buchsbaum was born in 1907, in Chickasha, Indian Territory, now part of Oklahoma. He earned his Ph.D. in zoology from the University of Chicago in 1932 and continued there ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Harold Urey
Harold Clayton Urey ( ; April 29, 1893 – January 5, 1981) was an American physical chemist whose pioneering work on isotopes earned him the Nobel Prize in Chemistry in 1934 for the discovery of deuterium. He played a significant role in the development of the atom bomb, as well as contributing to theories on the development of organic life from non-living matter. Born in Walkerton, Indiana, Urey studied thermodynamics under Gilbert N. Lewis at the University of California, Berkeley. After he received his PhD in 1923, he was awarded a fellowship by the American-Scandinavian Foundation to study at the Niels Bohr Institute in Copenhagen. He was a research associate at Johns Hopkins University before becoming an associate professor of Chemistry at Columbia University. In 1931, he began work with the separation of isotopes that resulted in the discovery of deuterium. During World War II, Urey turned his knowledge of isotope separation to the problem of uranium enrichment. He he ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
High Explosives
An explosive (or explosive material) is a reactive substance that contains a great amount of potential energy that can produce an explosion if released suddenly, usually accompanied by the production of light, heat, sound, and pressure. An explosive charge is a measured quantity of explosive material, which may either be composed solely of one ingredient or be a mixture containing at least two substances. The potential energy stored in an explosive material may, for example, be * chemical energy, such as nitroglycerin or grain dust * pressurized gas, such as a gas cylinder, aerosol can, or BLEVE * nuclear energy, such as in the fissile isotopes uranium-235 and plutonium-239 Explosive materials may be categorized by the speed at which they expand. Materials that detonate (the front of the chemical reaction moves faster through the material than the speed of sound) are said to be "high explosives" and materials that deflagrate are said to be "low explosives". Explosives may ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geology
Geology () is a branch of natural science concerned with Earth and other astronomical objects, the features or rocks of which it is composed, and the processes by which they change over time. Modern geology significantly overlaps all other Earth sciences, including hydrology, and so is treated as one major aspect of integrated Earth system science and planetary science. Geology describes the structure of the Earth on and beneath its surface, and the processes that have shaped that structure. It also provides tools to determine the relative and absolute ages of rocks found in a given location, and also to describe the histories of those rocks. By combining these tools, geologists are able to chronicle the geological history of the Earth as a whole, and also to demonstrate the age of the Earth. Geology provides the primary evidence for plate tectonics, the evolutionary history of life, and the Earth's past climates. Geologists broadly study the properties and processes of E ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Winnipeg, Manitoba
Winnipeg () is the capital and largest city of the province of Manitoba in Canada. It is centred on the confluence of the Red and Assiniboine rivers, near the longitudinal centre of North America. , Winnipeg had a city population of 749,607 and a metropolitan population of 834,678, making it the sixth-largest city, and eighth-largest metropolitan area in Canada. The city is named after the nearby Lake Winnipeg; the name comes from the Western Cree words for "muddy water" - “winipīhk”. The region was a trading centre for Indigenous peoples long before the arrival of Europeans; it is the traditional territory of the Anishinabe (Ojibway), Ininew (Cree), Oji-Cree, Dene, and Dakota, and is the birthplace of the Métis Nation. French traders built the first fort on the site in 1738. A settlement was later founded by the Selkirk settlers of the Red River Colony in 1812, the nucleus of which was incorporated as the City of Winnipeg in 1873. Being far inland, the local c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Poland
Poland, officially the Republic of Poland, is a country in Central Europe. It is divided into 16 administrative provinces called voivodeships, covering an area of . Poland has a population of over 38 million and is the fifth-most populous member state of the European Union. Warsaw is the nation's capital and largest metropolis. Other major cities include Kraków, Wrocław, Łódź, Poznań, Gdańsk, and Szczecin. Poland has a temperate transitional climate and its territory traverses the Central European Plain, extending from Baltic Sea in the north to Sudeten and Carpathian Mountains in the south. The longest Polish river is the Vistula, and Poland's highest point is Mount Rysy, situated in the Tatra mountain range of the Carpathians. The country is bordered by Lithuania and Russia to the northeast, Belarus and Ukraine to the east, Slovakia and the Czech Republic to the south, and Germany to the west. It also shares maritime boundaries with Denmark and Sweden. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Royal Society Of Canada
The Royal Society of Canada (RSC; french: Société royale du Canada, SRC), also known as the Academies of Arts, Humanities and Sciences of Canada (French: ''Académies des arts, des lettres et des sciences du Canada''), is the senior national, bilingual council of distinguished Canadian scholars, humanists, scientists and artists. The primary objective of the RSC is to promote learning and research in the arts, the humanities and the sciences. The RSC is Canada's National Academy and exists to promote Canadian research and scholarly accomplishment in both official languages, to recognize academic and artistic excellence, and to advise governments, non-governmental organizations and Canadians on matters of public interest. History In the late 1870s, the Governor General of Canada, the Marquis of Lorne, determined that Canada required a cultural institution to promote national scientific research and development. Since that time, succeeding Governor Generals have remained involved w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States National Academy Of Sciences
The National Academy of Sciences (NAS) is a United States nonprofit, non-governmental organization. NAS is part of the National Academies of Sciences, Engineering, and Medicine, along with the National Academy of Engineering (NAE) and the National Academy of Medicine (NAM). As a national academy, new members of the organization are elected annually by current members, based on their distinguished and continuing achievements in original research. Election to the National Academy is one of the highest honors in the scientific field. Members of the National Academy of Sciences serve '' pro bono'' as "advisers to the nation" on science, engineering, and medicine. The group holds a congressional charter under Title 36 of the United States Code. Founded in 1863 as a result of an Act of Congress that was approved by Abraham Lincoln, the NAS is charged with "providing independent, objective advice to the nation on matters related to science and technology. ... to provide scie ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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