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Wendell E. Dunn, Jr.
Wendell Earl Dunn Jr. (August 30, 1922 – December 24, 2007) was an American chemical engineer, metallurgy, metallurgist, and inventor. His technologies for high temperature chlorination reaction, chlorination, gold, tantalum and titanium extraction are still widely used. Early years Dunn was the first son of educator Wendell E. Dunn, for many years principal of Forest Park High School (Maryland), Forest Park High School in Baltimore, and brother of conductor Thomas Dunn (musician), Thomas Dunn. A graduate of Baltimore City College and Johns Hopkins University, Dunn was also awarded a doctorate in chemical engineering from Johns Hopkins. After completing the Harvard/MIT V-12 Navy College Training Program, V-12 program in 1944, he was engaged in aircraft terrain avoidance radar research in both the U.S. and occupied Germany. Dunn served as Captain (United States), captain in the U.S. Army Air Corps until 1946. Chemical research In 1950 Dunn was a key member of the research ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Baltimore, Maryland
Baltimore ( , locally: or ) is the most populous city in the U.S. state of Maryland, fourth most populous city in the Mid-Atlantic, and the 30th most populous city in the United States with a population of 585,708 in 2020. Baltimore was designated an independent city by the Constitution of Maryland in 1851, and today is the most populous independent city in the United States. As of 2021, the population of the Baltimore metropolitan area was estimated to be 2,838,327, making it the 20th largest metropolitan area in the country. Baltimore is located about north northeast of Washington, D.C., making it a principal city in the Washington–Baltimore combined statistical area (CSA), the third-largest CSA in the nation, with a 2021 estimated population of 9,946,526. Prior to European colonization, the Baltimore region was used as hunting grounds by the Susquehannock Native Americans, who were primarily settled further northwest than where the city was later built. Colonis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
DuPont
DuPont de Nemours, Inc., commonly shortened to DuPont, is an American multinational chemical company first formed in 1802 by French-American chemist and industrialist Éleuthère Irénée du Pont de Nemours. The company played a major role in the development of Delaware and first arose as a major supplier of gunpowder. DuPont developed many polymers such as Vespel, neoprene, nylon, Corian, Teflon, Mylar, Kapton, Kevlar, Zemdrain, M5 fiber, Nomex, Tyvek, Sorona, Corfam and Lycra in the 20th century, and its scientists developed many chemicals, most notably Freon (chlorofluorocarbons), for the refrigerant industry. It also developed synthetic pigments and paints including ChromaFlair. In 2015, DuPont and the Dow Chemical Company agreed to a reorganization plan in which the two companies would merge and split into three. As a merged entity, DuPont simultaneously acquired Dow and renamed itself to DowDuPont on August 31, 2017, and after 18 months spin off the merged entity' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Everett Dunn
Everett Wesley Dunn, (born August 1, 1892, Summit, South Dakota, died October 3, 1980, Hartley, Iowa, age 88) was a civil engineer and labor negotiator. He was known for his work with the Iowa State Highway Commission, which demonstrated his knowledge not only of engineering but of financing as well. Early life Everett Dunn was the son of Moncena and Lois Woodward Dunn. Moncena Dunn (1867–1944) was a farmer, optometrist, and inventor of the patented Dunn Ballot (fraud-proof coupon ballot). Everett Dunn was born August 1, 1892, at Summit, South Dakota. After graduating from high school in Minneapolis, he attended South Dakota State College at Brookings, South Dakota and graduated with a degree in Civil Engineering in 1913. Engineering career Dunn was county engineer at Eldora, Iowa, for several years, then served as District Highway Engineer for the State of Iowa at Sioux City, Iowa, until 1941, when he entered private practice. Dunn was employed by, or was a consultant for, t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Green Mount Cemetery
Green Mount Cemetery is a historic rural cemetery in Baltimore, Maryland, United States. Established on March 15, 1838, and dedicated on July 13, 1839, it is noted for the large number of historical figures interred in its grounds as well as many prominent Baltimore-area families. It retained the name Green Mount when the land was purchased from the heirs of Baltimore merchant Robert Oliver. Green Mount is a treasury of precious works of art, including striking works by major sculptors including William H. Rinehart and Hans Schuler. The cemetery was listed in the National Register of Historic Places in 1980. Guided tours are available at various times of the year. A Baltimore City Landmark plaque at the entrance reads: In addition to John Wilkes Booth, two other conspirators in the assassination of Abraham Lincoln are buried here, Samuel Arnold and Michael O'Laughlen. It is common for visitors to the cemetery to leave pennies on the graves of the three men; the one-cent coi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
South Dakota School Of Mines And Technology
The South Dakota School of Mines & Technology (South Dakota Mines, SD Mines, or SDSM&T) is a public university in Rapid City, South Dakota. It is governed by the South Dakota Board of Regents and was founded in 1885. South Dakota Mines offers bachelor’s, master’s, and doctoral degrees. History The cornerstone of the first School of Mines (then known as the Dakota School of Mines) building was dedicated on August 19, 1885, with the first classes being held February 21, 1887. John W. Hancher received the first bachelor of science degree at the first commencement on May 31, 1888. The school became known as the South Dakota School of Mines in 1889 after admission of South Dakota as a state to the United States. The School of Mines presented exhibits during the 1904 World's Fair and the first licensed radio station in the state of South Dakota was established on campus in December 1911, a full decade before WCAT (the precursor the current campus station KTEQ-FM). The first "M-Day ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Niobium
Niobium is a chemical element with chemical symbol Nb (formerly columbium, Cb) and atomic number 41. It is a light grey, crystalline, and ductile transition metal. Pure niobium has a Mohs hardness rating similar to pure titanium, and it has similar ductility to iron. Niobium oxidizes in Earth's atmosphere very slowly, hence its application in jewelry as a hypoallergenic alternative to nickel. Niobium is often found in the minerals pyrochlore and columbite, hence the former name "columbium". Its name comes from Greek mythology: Niobe, daughter of Tantalus, the namesake of tantalum. The name reflects the great similarity between the two elements in their physical and chemical properties, which makes them difficult to distinguish. English chemist Charles Hatchett reported a new element similar to tantalum in 1801 and named it columbium. In 1809, English chemist William Hyde Wollaston wrongly concluded that tantalum and columbium were identical. German chemist Heinrich Rose determin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rapid City
Rapid City ( lkt, link=no, Mni Lúzahaŋ Otȟúŋwahe; "Swift Water City") is the second most populous city in South Dakota and the county seat of Pennington County. Named after Rapid Creek, where the settlement developed, it is in western South Dakota, on the Black Hills' eastern slope. The population was 74,703 as of the 2020 Census. Known as the "Gateway to the Black Hills" and the "City of Presidents" because of the life-size bronze president statues downtown, Rapid City is split by a low mountain ridge that divides the city's western and eastern parts. Ellsworth Air Force Base is on the city's outskirts. Camp Rapid, part of the South Dakota Army National Guard, is in the city's western part. Rapid City is home to such attractions as Art Alley, Dinosaur Park, the City of Presidents walking tour, Chapel in the Hills, Storybook Island, and Main Street Square. The historic "Old West" town of Deadwood is nearby. In the neighboring Black Hills are the tourist attractions of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lien Brothers
A lien ( or ) is a form of security interest granted over an item of property to secure the payment of a debt or performance of some other obligation. The owner of the property, who grants the lien, is referred to as the ''lienee'' and the person who has the benefit of the lien is referred to as the ''lienor'' or ''lien holder''. The etymological root is Anglo-French ''lien'', ''loyen'' "bond", "restraint", from Latin ''ligamen'', from ''ligare'' "to bind". In the United States, the term lien generally refers to a wide range of encumbrances and would include other forms of mortgage or charge. In the US, a lien characteristically refers to '' nonpossessory'' security interests (see generally: ). In other common-law countries, the term lien refers to a very specific type of security interest, being a passive right to retain (but not sell) property until the debt or other obligation is discharged. In contrast to the usage of the term in the US, in other countries it refers to a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kerr-McGee
The Kerr-McGee Corporation, founded in 1929, was an American energy company involved in oil exploration, production of crude oil, natural gas, perchlorate and uranium mining and milling in various countries. On June 23, 2006, Anadarko Petroleum acquired Kerr-McGee in an all-cash transaction totaling $16.5 billion plus $2.6 billion in debt and all operations moved from their base in Oklahoma, United States. History The company later known as Kerr-McGee was founded in 1929 as Anderson & Kerr Drilling Company by Oklahoma businessman-politician Robert S. Kerr (1896-1963) and oil driller James L. Anderson. When Dean A. McGee (1904-1989), a former chief geologist for Phillips Petroleum, joined the firm in 1946, it changed its name to Kerr-McGee Oil Industries, Incorporated. The company initially focused mostly on off-shore oil exploration and production, being one of the first companies to use drillships in the Gulf of Mexico, and later one of the first companies to use a Spar type pla ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reynolds Metals
Reynolds Group Holdings is a New Zealand based packaging company with roots in the former Reynolds Metals Company, which was the second-largest aluminum company in the United States, and the third-largest in the world. Reynolds Metals was acquired by Alcoa in Reynolds Metals became known for the consumer product Reynolds Wrap foil, as well as for developing and promoting new uses for aluminum. Its RV ''Aluminaut'' submarine was operated by Reynolds Submarine Services Corporation. It was headquartered for most of its existence in Richmond, Virginia; the Modernist style Reynolds Metals Company International Headquarters was built there in 1958. History The Reynolds Metals Company was founded in 1919 as the U.S. Foil Company in Louisville, Kentucky, by Richard S. Reynolds Sr., nephew of tobacco king R. J. Reynolds. Initially, the new company supplied lead and tin foil wrappers to cigarette and candy companies. In 1924, U.S. Foil purchased the manufacturer of Eskimo Pies, whic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
South Dakota
South Dakota (; Sioux language, Sioux: , ) is a U.S. state in the West North Central states, North Central region of the United States. It is also part of the Great Plains. South Dakota is named after the Lakota people, Lakota and Dakota people, Dakota Sioux Native Americans in the United States, Native American tribes, who comprise a large portion of the population with nine Indian reservation, reservations currently in the state and have historically dominated the territory. South Dakota is the List of U.S. states and territories by area, seventeenth largest by area, but the List of U.S. states and territories by population, 5th least populous, and the List of U.S. states and territories by population density, 5th least densely populated of the List of U.S. states, 50 United States. As the southern part of the former Dakota Territory, South Dakota became a state on November 2, 1889, simultaneously with North Dakota. They are the 39th and 40th states admitted to the union; Pr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Peko-Wallsend
Peko-Wallsend was an Australian mining company. History Peko-Wallsend was founded in 1961 when Peko Mines merged with Wallsend Investments. In 1962 Peko-Wallsend purchased Toll Transport. In January 1968, Peko-Wallsend acquired a majority shareholding in the Mount Morgan Mine. In May 1979, Sims Metal was acquired. In December 1979, Peko-Wallsend acquired a 25% stake in the Ranger Uranium Mine. In 1986, Toll Transport was sold in a management buyout to Paul Little and Peter Rowsthorn. In 1988 Peko Wallsend was taken over by North Limited. North Limited
North Limited was a diversified mining and resources company. Although based in Australia, its ...
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