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Donald Mastick
Donald Francis Mastick (September 1, 1920 – September 8, 2007) was an American chemist who worked at the Manhattan Project's Los Alamos Laboratory. As part of Project Alberta, he was part of the planning and preparation for the atomic bombing of Hiroshima and Nagasaki, for which he was awarded the Bronze Star Medal. He later worked for the Naval Radiological Defense Laboratory and the Atomic Energy Commission. In 1971, he founded his own interior landscape company, Foliage Plant Systems. Early life Donald Francis Mastick was born in St. Helena, California, the son of Spencer Mastick and his wife Frankie Hite. He grew up in the Napa Valley. He entered the University of California, Berkeley, where he studied chemistry, graduating with his Bachelor of Science degree in 1942. He was a member of the Phi Beta Kappa and Sigma Xi honor societies. Manhattan Project By the time Mastick graduated, the United States had entered World War II. Mastick was studying radioactive carbo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Santa Barbara, California
Santa Barbara ( es, Santa Bárbara, meaning "Saint Barbara") is a coastal city in Santa Barbara County, California, of which it is also the county seat. Situated on a south-facing section of coastline, the longest such section on the West Coast of the United States, the city lies between the steeply rising Santa Ynez Mountains and the Pacific Ocean. Santa Barbara's climate is often described as Mediterranean climate, Mediterranean, and the city has been dubbed "The American Riviera". According to the 2020 United States census, U.S. Census, the city's population was 88,665. In addition to being a popular tourist and resort destination, the city has a diverse economy that includes a large service sector, education, technology, health care, finance, agriculture, manufacturing, and local government. In 2004, the service sector accounted for 35% of local employment. Education in particular is well represented, with four institutions of higher learning nearby: the University of Calif ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wendell Latimer
Wendell Mitchell Latimer (April 22, 1893 – July 6, 1955) was an American chemist notable for his description of oxidation states in his book "The Oxidation States of the Elements and Their Potentials in Aqueous Solution" (ASIN B000GRXLSA, first published 1938). He received his Ph.D from the University of California, Berkeley for the work with George Ernest Gibson. He earned many awards and honors for his scientific work. Awards and honors Latimer received many awards and honor during his lifetime including membership in the National Academy of Sciences, and chairmanship of its Section of Chemistry from 1947 to 1950; the Distinguished Service Award from his alma mater, the University of Kansas, in 1948; the President's Certificate of Merit, in 1948; Faculty Research Lecture in 1953, an honor that the Academic Senate of the University of California annually bestows upon one of its members; the William H. Nichols Medal from the New York Section of the American Chemical Soc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stafford L
Stafford () is a market town and the county town of Staffordshire, in the West Midlands region of England. It lies about north of Wolverhampton, south of Stoke-on-Trent and northwest of Birmingham. The town had a population of 70,145 in the 2021 census, It is the main settlement within the larger borough of Stafford which had a population of 136,837 (2021). History Stafford means "ford" by a staithe (landing place). The original settlement was on a dry sand and gravel peninsula that offered a strategic crossing point in the marshy valley of the River Sow, a tributary of the River Trent. There is still a large area of marshland north-west of the town, which is subject to flooding and did so in 1947, 2000, 2007 and 2019. Stafford is thought to have been founded about AD 700 by a Mercian prince called Bertelin, who, legend has it, founded a hermitage on a peninsula named Betheney. Until recently it was thought that the remains of a wooden preaching cross from the time had ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Louis Hempelmann
Louis Henry Hempelmann Jr, (March 5, 1914 – June 21, 1993) was an American physician who was the director of the Health Group at the Manhattan Project's Los Alamos Laboratory during World War II. After the war he was involved in research into radiology. A paper he published in the ''New England Journal of Medicine'' in 1949 warned of the dangers of using fluoroscopes to measure the size of children's feet. Early life Louis Henry Hempelmann Jr. was born in St. Louis, Missouri, on March 5, 1914, the son of Louis Henry Hempelmann Sr. Both his father and grandfather were physicians. He earned both his undergraduate and medical degrees from Washington University in St. Louis, from which he graduated in 1938. He did his internship in pathology at Barnes Hospital in St. Louis, and then his residency at Peter Bent Brigham Hospital in Boston. In 1941, Sherwood Moore, the director of Mallinckrodt Institute of Radiology in St. Louis, and a friend of his father, offered Hempelmann a po ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alpha Radiation
Alpha decay or α-decay is a type of radioactive decay in which an atomic nucleus emits an alpha particle (helium nucleus) and thereby transforms or 'decays' into a different atomic nucleus, with a mass number that is reduced by four and an atomic number that is reduced by two. An alpha particle is identical to the nucleus of a helium-4 atom, which consists of two protons and two neutrons. It has a charge of and a mass of . For example, uranium-238 decays to form thorium-234. While alpha particles have a charge , this is not usually shown because a nuclear equation describes a nuclear reaction without considering the electrons – a convention that does not imply that the nuclei necessarily occur in neutral atoms. Alpha decay typically occurs in the heaviest nuclides. Theoretically, it can occur only in nuclei somewhat heavier than nickel (element 28), where the overall binding energy per nucleon is no longer a maximum and the nuclides are therefore unstable toward spontaneo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dissociation (chemistry)
Dissociation in chemistry is a general process in which molecules (or ionic compounds such as salts, or complexes) separate or split into other things such as atoms, ions, or radicals, usually in a reversible manner. For instance, when an acid dissolves in water, a covalent bond between an electronegative atom and a hydrogen atom is broken by heterolytic fission, which gives a proton (H+) and a negative ion. Dissociation is the opposite of association or recombination. Dissociation constant For reversible dissociations in a chemical equilibrium :AB A + B the dissociation constant ''K''d is the ratio of dissociated to undissociated compound :K_d = \mathrm where the brackets denote the equilibrium concentrations of the species. Dissociation degree The dissociation degree \alpha is the fraction of original solute molecules that have dissociated. It is usually indicated by the Greek symbol α. More accurately, degree of dissociation refers to the amount of solute dissociated i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plutonium(III) Chloride
Plutonium(III) chloride is a chemical compound with the formula PuCl3. This ionic plutonium salt can be prepared by reacting the metal with hydrochloric acid. Structure Plutonium atoms in crystalline PuCl3 are 9 coordinate, and the structure is tricapped trigonal prismatic. It crystallizes as the trihydrate, and forms lavender-blue solutions in water.John H. Burns, J. R. Peterson, J. N. Stevenson: "Crystallographic Studies of some Transuranic Trihalides: 239PuCl3, 244CmBr3, 249BkBr3 and 249CfBr3", ''Journal of Inorganic and Nuclear Chemistry'' 1975, ''37 (3)'', 743–749; . Safety As with all plutonium compounds, it is subject to control under the Nuclear Non-Proliferation Treaty The Treaty on the Non-Proliferation of Nuclear Weapons, commonly known as the Non-Proliferation Treaty or NPT, is an international treaty whose objective is to prevent the spread of nuclear weapons and weapons technology, to promote cooperation .... Due to the radioactivity of plutonium, all o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arthur Wahl
Arthur Charles Wahl (September 8, 1917 – March 6, 2006) was an American chemist who, as a doctoral student of Glenn T. Seaborg at the University of California, Berkeley, first isolated plutonium in February 1941.Glenn Seaborg: Chamberlain of Science. Science Spectra. Nº 11 (1998) He was a worker on the in Los Alamos until 1946, when he joined Washington University in St. Louis< ...
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Edwin McMillan
Edwin Mattison McMillan (September 18, 1907 – September 7, 1991) was an American physicist credited with being the first-ever to produce a transuranium element, neptunium. For this, he shared the 1951 Nobel Prize in Chemistry with Glenn Seaborg. A graduate of California Institute of Technology, he earned his doctorate from Princeton University in 1933, and joined the Berkeley Radiation Laboratory, where he discovered oxygen-15 and beryllium-10. During World War II, he first worked on microwave radar at the MIT Radiation Laboratory, and on sonar at the Navy Radio and Sound Laboratory. In 1942 he joined the Manhattan Project, the wartime effort to create atomic bombs, and he helped establish the project's Los Alamos Laboratory where the bombs were designed. He led teams working on the gun-type nuclear weapon design, and also participated in the development of the successful implosion-type nuclear weapon. McMillan co-invented the synchrotron with Vladimir Veksler, and after th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
John Harry Williams
John Harry Williams (July 7, 1908 – April 18, 1966) was a Canadian-American physicist. Born in the asbetos mining town of Asbestos, Quebec, he had three brothers: Elewyn, Lloyd, and Arthur. John was an active child and participated in sports, developing a lifelong interest in the outdoors. His father, a mining engineer, died during the First World War, leaving his wife Josephine Stockwell to raise the family alone. She moved the family to Kelowna, British Columbia, where John attended public high school. He matriculated to the University of British Columbia on a full scholarship, where he graduated with a BS degree in 1928. During his last year at the university, he was married to Vera Martin; the couple had three children. Williams performed his graduate studies at the University of California, Berkeley, where he was awarded an MA degree in 1930 and a PhD the following year. In his first year of graduate school he published his first paper about a double crystal x-ray spectromet ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Robert Serber
Robert Serber (March 14, 1909 – June 1, 1997) was an American physicist who participated in the Manhattan Project. Serber's lectures explaining the basic principles and goals of the project were printed and supplied to all incoming scientific staff, and became known as '' The Los Alamos Primer''. The ''New York Times'' called him “the intellectual midwife at the birth of the atomic bomb.” Early life and education He was born in Philadelphia, the eldest son of Rose (Frankel) and David Serber. His family was Jewish. His mother died in 1922 and his father married her cousin Frances Leof in 1928. Robert Serber earned his BS in engineering physics from Lehigh University in 1930 and earned his PhD in physics from the University of Wisconsin–Madison with John Van Vleck in 1934. He married Charlotte Leof (26 Jul 1911 – 1967), the daughter of his stepmother's uncle, in 1933. Shortly before receiving his doctorate, Serber was selected for a National Research Council postdoctor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Robert R
Robert Lee Rayford (February 3, 1953 – May 15 1969), sometimes identified as Robert R. due to his age, was an American teenager from Missouri who has been suggested to represent the earliest confirmed case of HIV/AIDS in North America based on evidence which was published in 1988 in which the authors claimed that medical evidence indicated that he was "infected with a virus closely related or identical to human immunodeficiency virus type 1." Rayford died of pneumonia, but his other symptoms baffled the doctors who treated him. A study published in 1988 reported the detection of antibodies against HIV. Results of testing for HIV genetic material were reported once at a scientific conference in Australia in 1999; however, the data has never been published in a peer-reviewed medical or scientific journal. Background Robert Rayford was born on February 3, 1953, in St. Louis, Missouri to Constance Rayford (September 12, 1931 – April 3, 2011) and Joseph Benny Bell (March 24, 1 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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