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David Rittenberg
David Rittenberg (November 11, 1906 – January 24, 1970) was an American biochemist who pioneered the isotopic ''tagging'' of molecules. He was born and died in New York, and spent almost the whole of his life there. He obtained his B.S. in 1929 from the City College of New York, and his Ph.D. in 1935 at Columbia University under the supervision of Harold Urey. Research on isotopes as tracers Rittenberg's doctoral work concerned thermodynamic properties of molecules containing 2H (deuterium), and he built his career principally on work with isotopes. His introduction of the use of 2H as a tracer to follow the fate of various different compounds in human metabolism changed the prevailing scientific theory, from a static, "wear and tear" view of metabolic processes, to a dynamic theory in which there is constant and rapid buildup and degradation of body constituents. In their Biographical Memoir David Shemin and Ronald Bentley described the approach in these terms: From 1935 o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Weizmann Institute Of Science
The Weizmann Institute of Science ( ''Machon Weizmann LeMada'') is a Public university, public research university in Rehovot, Israel, established in 1934, fourteen years before the State of Israel was founded. Unlike other List of Israeli universities and colleges, Israeli universities it exclusively offers postgraduate-only degrees in the natural science, natural and exact sciences. The institute is a multidisciplinary research center, employing around 3,800 scientists, Postdoctoral researcher, postdoctoral fellows, Ph.D. and M.Sc. students, and scientific, technical, and administrative staff working at the institute. As of 2019, the Weizmann Institute of Science has been associated with six Nobel laureates and three Turing Award winners. The Weizmann Institute of Science and Elbit Systems have collaborated on various projects, notably including the development and supply of the space telescope for Israel's Ultraviolet Transient Astronomy Satellite (ULTRASAT) program and re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Isotope
Isotopes are distinct nuclear species (or ''nuclides'') of the same chemical element. They have the same atomic number (number of protons in their Atomic nucleus, nuclei) and position in the periodic table (and hence belong to the same chemical element), but different nucleon numbers (mass numbers) due to different numbers of neutrons in their nuclei. While all isotopes of a given element have similar chemical properties, they have different atomic masses and physical properties. The term isotope is derived from the Greek roots isos (wikt:ἴσος, ἴσος "equal") and topos (wikt:τόπος, τόπος "place"), meaning "the same place"; thus, the meaning behind the name is that different isotopes of a single element occupy the same position on the periodic table. It was coined by Scottish doctor and writer Margaret Todd (doctor), Margaret Todd in a 1913 suggestion to the British chemist Frederick Soddy, who popularized the term. The number of protons within the atomic nuc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1970 Deaths
Events January * January 1 – Unix time epoch reached at 00:00:00 UTC. * January 5 – The 7.1 1970 Tonghai earthquake, Tonghai earthquake shakes Tonghai County, Yunnan province, China, with a maximum Mercalli intensity scale, Mercalli intensity of X (''Extreme''). Between 10,000 and 14,621 are killed and 30,000 injured. * January 15 – After a 32-month fight for independence from Nigeria, Biafran forces under Philip Effiong formally surrender to General Yakubu Gowon, ending the Nigerian Civil War. February * February 1 – The Benavídez rail disaster near Buenos Aires, Argentina (a rear-end collision) kills 236. * February 10 – An avalanche at Val-d'Isère, France, kills 41 tourists. * February 11 – ''Ohsumi (satellite), Ohsumi'', Japan's first satellite, is launched on a Lambda-4 rocket. * February 22 – Guyana becomes a Republic within the Commonwealth of Nations. * February – Multi-business Conglomerate (company), conglomerate Virgin Group is founded as a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1906 Births
Events January–February * January 12 – Persian Constitutional Revolution: A nationalistic coalition of merchants, religious leaders and intellectuals in Persia forces the shah Mozaffar ad-Din Shah Qajar to grant a constitution, and establish a national assembly, the National Consultative Assembly, Majlis. * January 16–April 7 – The Algeciras Conference convenes, to resolve the First Moroccan Crisis between French Third Republic, France and German Empire, Germany. * January 22 – The strikes a reef off Vancouver Island, Canada, killing over 100 (officially 136) in the ensuing disaster. * January 31 – The 1906 Ecuador–Colombia earthquake, Ecuador–Colombia earthquake (8.8 on the Moment magnitude scale), and associated tsunami, cause at least 500 deaths. * February 7 – is launched, sparking a Anglo-German naval arms race, naval race between Britain and Germany. * February 11 ** Pope Pius X publishes the encyclical ''Vehementer Nos'', de ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hadassah Medical Center
Hadassah Medical Center () is an Israeli medical organization established in 1934 that operates two university hospitals in Jerusalem (one in Ein Karem and one in Mount Scopus) as well as schools of medicine, dentistry, nursing, and pharmacology affiliated with the Hebrew University of Jerusalem. Its declared mission is to extend a "hand to all, without regard for race, religion or ethnic origin." The hospital was founded by the Hadassah Women's Zionist Organization of America, which continues to underwrite a large part of its budget today. The Medical Center ranks as the sixth-largest hospital complex in Israel. Across its two campuses, Hadassah Medical Center has over 1,300 beds, 31 operating theaters and nine special intensive care units, and runs five schools of medical professions. History Late Ottoman period (1912–1915) The Hadassah organization was established in 1912 in New York City to provide health care in Ottoman-ruled Jerusalem. In 1913, Hadassah sent two nurses t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rehovot
Rehovot (, / ) is a city in the Central District (Israel), Central District of Israel, about south of Tel Aviv. In it had a population of . Etymology Israel Belkind, founder of the Bilu (movement), Bilu movement, proposed the name "Rehovot" () based on Book of Genesis, Genesis 26:22: "And he called the name of it ''Rehoboth''; and he said: 'For now the Lord hath made room for us, and we shall be fruitful in the land'." This Bible verse is also inscribed in the city's logo. The biblical town of ''Rehoboth (Bible), Rehoboth'' was located in the Negev, Negev Desert. History Rehovot was established in 1890 by pioneers of the First Aliyah on the coastal plain near a site called ''Khirbat Deiran'', an "abandoned or sparsely populated" estate, which now lies in the center of the built-up area of the city. According to Marom, Deiran offered "a convenient launching pad for early land purchase initiatives which shaped the pattern of Jewish settlement until the beginning of the Brit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Weizmann Institute
The Weizmann Institute of Science ( ''Machon Weizmann LeMada'') is a Public university, public research university in Rehovot, Israel, established in 1934, fourteen years before the State of Israel was founded. Unlike other List of Israeli universities and colleges, Israeli universities it exclusively offers postgraduate-only degrees in the natural science, natural and exact sciences. The institute is a multidisciplinary research center, employing around 3,800 scientists, Postdoctoral researcher, postdoctoral fellows, Ph.D. and M.Sc. students, and scientific, technical, and administrative staff working at the institute. As of 2019, the Weizmann Institute of Science has been associated with six Nobel laureates and three Turing Award winners. The Weizmann Institute of Science and Elbit Systems have collaborated on various projects, notably including the development and supply of the space telescope for Israel's Ultraviolet Transient Astronomy Satellite (ULTRASAT) program and re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Molecule
A molecule is a group of two or more atoms that are held together by Force, attractive forces known as chemical bonds; depending on context, the term may or may not include ions that satisfy this criterion. In quantum physics, organic chemistry, and biochemistry, the distinction from ions is dropped and ''molecule'' is often used when referring to polyatomic ions. A molecule may be homonuclear, that is, it consists of atoms of one chemical element, e.g. two atoms in the oxygen molecule (O2); or it may be heteronuclear, a chemical compound composed of more than one element, e.g. water (molecule), water (two hydrogen atoms and one oxygen atom; H2O). In the kinetic theory of gases, the term ''molecule'' is often used for any gaseous particle regardless of its composition. This relaxes the requirement that a molecule contains two or more atoms, since the noble gases are individual atoms. Atoms and complexes connected by non-covalent interactions, such as hydrogen bonds or ionic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Biochemist
Biochemists are scientists who are trained in biochemistry. They study chemical processes and chemical transformations in living organisms. Biochemists study DNA, proteins and Cell (biology), cell parts. The word "biochemist" is a portmanteau of "biological chemist." Biochemists also research how certain chemical reactions happen in cells and Tissue (biology), tissues and observe and record the effects of Product (chemistry), products in food additives and Medication, medicines. Biochemist researchers focus on playing and constructing research experiments, mainly for developing new products, updating existing products and analyzing said products. It is also the responsibility of a biochemist to present their research findings and create Grant writing, grant proposals to obtain Funding of science, funds for future research. Biochemists study aspects of the immune system, the expressions of genes, isolating, analyzing, and synthesizing different products, mutations that lead to ca ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Biochemistry
Biochemistry, or biological chemistry, is the study of chemical processes within and relating to living organisms. A sub-discipline of both chemistry and biology, biochemistry may be divided into three fields: structural biology, enzymology, and metabolism. Over the last decades of the 20th century, biochemistry has become successful at explaining living processes through these three disciplines. Almost all List of life sciences, areas of the life sciences are being uncovered and developed through biochemical methodology and research.#Voet, Voet (2005), p. 3. Biochemistry focuses on understanding the chemical basis that allows biomolecule, biological molecules to give rise to the processes that occur within living Cell (biology), cells and between cells,#Karp, Karp (2009), p. 2. in turn relating greatly to the understanding of tissue (biology), tissues and organ (anatomy), organs as well as organism structure and function.#Miller, Miller (2012). p. 62. Biochemistry is closely ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eli Lilly Award In Biological Chemistry
The Eli Lilly Award in Biological Chemistry was established in 1934. Consisting of a bronze medal and honorarium, its purpose is to stimulate fundamental research in biological chemistry by scientists not over thirty-eight years of age. The Award is administered by the Division of Biological Chemistry of the American Chemical Society. Recipients Past recipients of the Lilly Award: *1935 – Willard Myron Allen *1937 – *1938 – *1939 – George Wald *1940 – *1941 – David Rittenberg *1942 – Earl A. Evans, Jr. *1943 – Herbert E. Carter *1944 – Joseph S. Fruton *1945 – *1946 – John D. Ferry *1947 – Sidney Colowick *1948 – Dilworth Wayne Woolley *1949 – *1950 – *1951 – John M. Buchanan *1952 – *1953 – Nathan O. Kaplan *1954 – Harvey A. Itano *1955 – William F. Neuman *1956 – Robert A. Alberty *1957 – Harold A. Scheraga *1958 – Lester J. Reed *1959 – Paul Berg *1960 – James D. Watson *1961 – *1962 – Jerard Hurwit ... [...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] |
