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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 U ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kobryn
Kobryn or Kobrin is a town in Brest Region, Belarus. It serves as the administrative center of Kobryn District. It is located in the southwestern corner of Belarus, where the Mukhavets river and Dnieper–Bug Canal meet. The town lies about east of the city of Brest, Belarus, Brest. As of 2025, it has a population of 52,432. History In the early times, it was inhabited by the ancient Balts, 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 Soviet Socialist Republic, Byelorussian SSR, and the Belarus, Republic of Belarus. Middle Ages and early modern era In the 10th century, the area became part of the emerging Civitas Schinesghe, Polish state under first ruler Mieszko I of Poland. Later, the area was part of the Kievan Rus' and the Kingdom of Galicia–Volhynia. Kobryn was first mentioned in 1287. I ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Urey Medal (European Association Of Geochemistry)
The Urey Medal is given annually by the European Association of Geochemistry for outstanding contributions advancing Geochemistry over a career. The award is named after the physical chemist Harold Urey, FRS. Urey Medalists See also * List of geology awards This list of geology awards is an index to articles on notable awards for geology, an earth science concerned with the solid earth, solid Earth, the rock (geology), rocks of which it is composed, and the processes by which they change over time. G ... References {{reflist European science and technology awards Geology awards ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heinz A
The Kraft Heinz Foods Company, formerly the H. J. Heinz Company and commonly known as Heinz (), 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 food products on six continents, and markets them in more than 200 countries and territories. The company claimed 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 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 then manufactured more than 60 products, 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 2 ... [...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 Nuclear weapon, atom bomb, as well as contributing to theories on the Miller–Urey experiment, 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 ... [...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 Dust explosion, grain dust * pressure, pressurized gas compressor, gas, such as a gas cylinder, aerosol can, or boiling liquid expanding vapor explosion * nuclear weapon, 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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geology
Geology (). is a branch of natural science concerned with the Earth and other astronomical objects, the rocks of which they are composed, and the processes by which they change over time. Modern geology significantly overlaps all other Earth sciences, including hydrology. It is integrated with 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. Geologists study the mineralogical composition of rocks in order to get insight into their history of formation. Geology determines the relative ages of rocks found at a given location; geochemistry (a branch of geology) determines their absolute ages. By combining various petrological, crystallographic, and paleontological tools, geologists are able to chronicle the geological history of the Earth as a whole. One aspect is to demonstrate the age of the Earth. Geology provides evidence for plate tectonics, the ev ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Winnipeg, Manitoba
Winnipeg () is the capital and largest city of the Provinces and territories of Canada, Canadian province of Manitoba. It is centred on the confluence of the Red River of the North, Red and Assiniboine River, Assiniboine rivers. , Winnipeg had a city population of 749,607 and a metropolitan population of 834,678, making it Canada's List of the largest municipalities in Canada by population, sixth-largest city and List of census metropolitan areas and agglomerations in Canada, eighth-largest metropolitan area. The city is named after the nearby Lake Winnipeg; the name comes from the Cree language, Western Cree words for 'muddy water' – . The region was a trading centre for Indigenous peoples in Canada, Indigenous peoples long before the European colonization of the Americas, arrival of Europeans; it is the traditional territory of the Anishinaabe (Ojibway), Ininew (Cree), Oji-Cree, Dene, and Dakota people, Dakota, and is the birthplace of the Métis people in Canada, Métis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Poland
Poland, officially the Republic of Poland, is a country in Central Europe. It extends from the Baltic Sea in the north to the Sudetes and Carpathian Mountains in the south, 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. The territory has a varied landscape, diverse ecosystems, and a temperate climate. Poland is composed of Voivodeships of Poland, sixteen voivodeships and is the fifth most populous member state of the European Union (EU), with over 38 million people, and the List of European countries by area, fifth largest EU country by area, covering . The capital and List of cities and towns in Poland, largest city is Warsaw; other major cities include Kraków, Wrocław, Łódź, Poznań, and Gdańsk. Prehistory and protohistory of Poland, Prehistoric human activity on Polish soil dates to the Lower Paleolithic, with continuous settlement since the end of the Last Gla ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Royal Society Of Canada
The Royal Society of Canada (RSC; , 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. It promotes Canadian research and scholarly accomplishment in both official languages, recognizes academic and artistic excellence, and advises governments, non-governmental organizations, and Canadians on matters of public interest. History In the late 1870s, the Governor General of Canada, John Campbell, 9th Duke of Argyll, John Campbell, Marquis of Lorne, determined that Canada required a cultural institution to promote national scientific research and development. Since that time, succeeding governors general have remained invol ... [...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 in the United States. 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. Congress legislated and President Abraham Lincoln signed an Act of Congress (1863) establishing the National Academy of Sciences as an independent, trusted nongovernmental institution, created for the purpose of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stable Isotope
Stable nuclides are Isotope, isotopes of a chemical element whose Nucleon, nucleons are in a configuration that does not permit them the surplus energy required to produce a radioactive emission. The Atomic nucleus, nuclei of such isotopes are not radioactive and unlike radionuclides do not spontaneously undergo radioactive decay. When these nuclides are referred to in relation to specific elements they are usually called that element's stable isotopes. The 80 elements with one or more stable isotopes comprise a total of 251 nuclides that have not been shown to decay using current equipment. Of these 80 elements, 26 have only one stable isotope and are called monoisotopic element, monoisotopic. The other 56 have more than one stable isotope. Tin has ten stable isotopes, the largest number of any element. Definition of stability, and naturally occurring nuclides Most naturally occurring nuclides are stable (about 251; see list at the end of this article), and about 35 more (tot ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
