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Mario J. Molina
Mario José Molina-Pasquel Henríquez (19 March 19437 October 2020) was a Mexican physical chemist. He played a pivotal role in the discovery of the Antarctic ozone hole, and was a co-recipient of the 1995 Nobel Prize in Chemistry for his role in discovering the threat to the Earth's ozone layer from chlorofluorocarbon (CFC) gases. He was the first Mexican-born scientist to receive a Nobel Prize in Chemistry and the third Mexican-born person to receive a Nobel prize. In his career, Molina held research and teaching positions at University of California, Irvine, California Institute of Technology, Massachusetts Institute of Technology, University of California, San Diego, and the Center for Atmospheric Sciences at the Scripps Institution of Oceanography. Molina was also Director of the Mario Molina Center for Energy and Environment in Mexico City. Molina was a climate policy advisor to the President of Mexico, Enrique Peña Nieto. Early life Molina was born in Mexico City t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mexico City
Mexico City is the capital city, capital and List of cities in Mexico, largest city of Mexico, as well as the List of North American cities by population, most populous city in North America. It is one of the most important cultural and financial centers in the world, and is classified as an Globalization and World Cities Research Network, Alpha world city according to the Globalization and World Cities Research Network (GaWC) 2024 ranking. Mexico City is located in the Valley of Mexico within the high Mexican central plateau, at an altitude of . The city has 16 Boroughs of Mexico City, boroughs or , which are in turn divided into List of neighborhoods in Mexico City, neighborhoods or . The 2020 population for the city proper was 9,209,944, with a land area of . According to the most recent definition agreed upon by the federal and state governments, the population of Greater Mexico City is 21,804,515, which makes it the list of largest cities#List, sixth-largest metropolitan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
NASA Exceptional Scientific Achievement Medal
The NASA Exceptional Scientific Achievement Medal (abbrv. ESAM) was established by NASA on September 15, 1961, when the original ESM was divided into three separate awards. Under its guidelines, the ESAM is awarded for unusually significant scientific contribution toward achievement of aeronautical or space exploration goals. This award may be given for individual efforts that have resulted in a contribution of fundamental importance in this field, or have significantly enhanced understanding of this field. Recipients (incomplete list) * 1962 – Robert E. Bourdeau * 1963 – John Houbolt * 1965 – Jack N. James * 1966 – Richard Franz Joseph Arenstorf (He was awarded the medal for his contributions to the Space Navigation and the Apollo Lunar Landing Program. * 1968 – G. Mervin Ault * 1969 – Charles Berry, William F. Brown, Thomas Canning, Moustafa Chahine, Hong-Yee Chiu, Clarence Cone, James Downey, Erwin Fehlberg, Richard Green, Rudolf Hanel, Webb Haymaker, Gerhard ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scripps Institution Of Oceanography
Scripps Institution of Oceanography (SIO) is the center for oceanography and Earth science at the University of California, San Diego. Its main campus is located in La Jolla, with additional facilities in Point Loma. Founded in 1903 and incorporated into the University of California system in 1912, the institution has since broadened its research focus to encompass the physics, chemistry, geology, biology, and climate of the Earth. The institution awards the Nierenberg Prize annually to recognize researchers with exceptional contributions to science in public interest. History Founding Scripps Institution of Oceanography can trace its beginnings back to William Ritter, a biologist originally from Wisconsin. In 1891, Ritter was offered a job teaching biology at the University of California, Berkeley and married Mary Bennett. Their honeymoon and subsequent biological studies took them to San Diego, where Ritter met a local physician and naturalist, Fred Baker, who would ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
La Jornada
''La Jornada'' (''The Working Day'') is one of Mexico City's leading daily newspapers. It was established in 1984 by Carlos Payán Velver. The current editor (''directora general'') is Carmen Lira Saade. As of 2006 it had approximately 287,000 readers in Mexico City, and, according to them, their website has approximately 180,000 daily page views. The online version was launched in 1995, with no restrictions on access and a Google-based search that includes the historic archives of the newspaper. The website is hosted by the National Autonomous University of Mexico (UNAM). Regional Editions ''La Jornada'' has the following regional editions: * La Jornada Aguascalientes * La Jornada Baja California * La Jornada Estado de México * La Jornada Hidalgo * La Jornada Maya * La Jornada Morelos * La Jornada de Oriente * La Jornada San Luis * La Jornada Veracruz * La Jornada Zacatecas Previously, ''La Jornada'' had editions in Guerrero, Jalisco, and Michoacán. Contributors Many ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chlorofluorocarbon
Chlorofluorocarbons (CFCs) and hydrochlorofluorocarbons (HCFCs) are fully or partly Halogenation, halogenated hydrocarbons that contain carbon (C), hydrogen (H), chlorine (Cl), and fluorine (F). They are produced as volatility (chemistry), volatile derivatives of methane, ethane, and propane. The most common example of a CFC is dichlorodifluoromethane (R-12). R-12, also commonly called Freon, is used as a refrigerant. Many CFCs have been widely used as refrigerants, propellants (in aerosol applications), gaseous fire suppression systems, and solvents. As a result of CFCs contributing to ozone depletion in the upper atmosphere, the manufacture of such compounds has been phased out under the Montreal Protocol, and they are being replaced with other products such as hydrofluorocarbons (HFCs) and hydrofluoroolefins (HFOs) including R-410A, R-134a and 2,3,3,3-Tetrafluoropropene, R-1234yf. Structure, properties and production As in simpler alkanes, carbons in CFCs bond with tetrahe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ozone Layer
The ozone layer or ozone shield is a region of Earth's stratosphere that absorption (electromagnetic radiation), absorbs most of the Sun's ultraviolet radiation. It contains a high concentration of ozone (O3) in relation to other parts of the atmosphere, although still small in relation to other gases in the stratosphere. The ozone layer peaks at 8 to 15 parts per million of ozone, while the average ozone concentration in Earth's atmosphere as a whole is about 0.3 parts per million. The ozone layer is mainly found in the lower portion of the stratosphere, from approximately above Earth, although its thickness varies seasonally and geographically. The ozone layer was discovered in 1913 by French physicists Charles Fabry and Henri Buisson. Measurements of the sun showed that the radiation sent out from its surface and reaching the ground on Earth is usually consistent with the spectrum of a black body with a temperature in the range of , except that there was no radiation below a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ozone Depletion
Ozone depletion consists of two related events observed since the late 1970s: a lowered total amount of ozone in Earth, Earth's upper atmosphere, and a much larger springtime decrease in stratospheric ozone (the ozone layer) around Earth's polar regions. The latter phenomenon is referred to as the #Ozone hole and its causes, ozone hole. There are also springtime polar tropospheric ozone depletion events in addition to these stratospheric events. The main causes of ozone depletion and the ozone hole are manufactured chemicals, especially manufactured halocarbon refrigerants, solvents, propellants, and foam-blowing agents (chlorofluorocarbons (CFCs), HCFCs, Haloalkanes, halons), referred to as ''ozone-depleting substances'' (ODS). These compounds are transported into the stratosphere by Turbulence, turbulent mixing after being emitted from the surface, mixing much faster than the molecules can settle. Once in the stratosphere, they release atoms from the halogen group through photod ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Science History Institute
The Science History Institute is an institution that preserves and promotes understanding of the history of science. Located in Philadelphia, Pennsylvania, it includes a library, museum, archive, research center and conference center. It was founded in 1982 as a joint venture of the American Chemical Society and the University of Pennsylvania, as the Center for the History of Chemistry (CHOC). The American Institute of Chemical Engineers (AIChE) became a co-founder in 1984. It was renamed the Chemical Heritage Foundation (CHF) in 1992, and moved two years later to the institution's current location, 315 Chestnut Street in Old City. On December 1, 2015, CHF merged with the Life Sciences Foundation, creating an organization that covers "the history of the life sciences and biotechnology together with the history of the chemical sciences and engineering." As of February 1, 2018, the organization was renamed the Science History Institute, to reflect its wider range of histori ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ozone Hole Recovery
Ozone () (or trioxygen) is an inorganic molecule with the chemical formula . It is a pale blue gas with a distinctively pungent smell. It is an allotrope of oxygen that is much less stable than the diatomic allotrope , breaking down in the lower atmosphere to (dioxygen). Ozone is formed from dioxygen by the action of ultraviolet (UV) light and electrical discharges within the Earth's atmosphere. It is present in very low concentrations throughout the atmosphere, with its highest concentration high in the ozone layer of the stratosphere, which absorbs most of the Sun's ultraviolet (UV) radiation. Ozone's odor is reminiscent of chlorine, and detectable by many people at concentrations of as little as in air. Ozone's O3 chemical structure, structure was determined in 1865. The molecule was later proven to have a bent structure and to be weakly diamagnetism, diamagnetic. At standard temperature and pressure, ozone is a pale blue gas that condenses at cryogenic fuel, cryogenic temp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Presidential Medal Of Freedom
The Presidential Medal of Freedom is the highest civilian award of the United States, alongside the Congressional Gold Medal. It is an award bestowed by decision of the president of the United States to "any person recommended to the President for award of the Medal or any person selected by the President upon his own initiative", and was created to recognize people who have made "an especially meritorious contribution to (1) the security or national interests of the United States, or (2) world peace, or (3) cultural or other significant public or private endeavors." The award is not limited to U.S. citizens, and, while it is a civilian award, it can also be awarded to military personnel and worn on the uniform. It was established in 1963 by President John F. Kennedy, superseding the Medal of Freedom that was initially established by President Harry S. Truman in 1945 to honor civilian service. Occasionally, the medal award is further denoted as, "with distinction." There are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Volvo Environment Prize
The Volvo Environment Prize is a highly regarded annual scientific award. The prize is awarded to individuals who "''explore the way to a sustainable world''." The prize is awarded by the Volvo Environment Prize Foundation which was instituted in 1988. Scientific excellence is the most important criterion for becoming a laureate. The candidate must have an outstanding research and publication record in his or her field. Strong emphasis is also placed on the research's impact on the policy and application sectors. The Volvo Environment Prize recipient receives a "hand-crafted diploma, a glass sculpture and a cash award of SEK 1.5 million (approximately Euro 135,000 or USD 140,000)". Organisation A scientific committee headed by Professor Carl Folke does the initial screening and evaluation of candidates, which are presented to the International prize jury. The prize jury is chaired by Professor Mary Scholes (University of the Witwatersrand, South Africa) with members Professor P ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heinz Award
The Heinz Awards are individual achievement honors given annually by the Heinz Foundations, Heinz Family Foundation. The Heinz Awards each year recognize outstanding individuals for their innovative contributions in three areas: the Arts, the Economy and the Environment. The award was established in 1993 by Teresa Heinz, the chairwoman of the Heinz Foundations, Heinz Family Foundation, in honor of her late husband, U.S. Senator H. John Heinz III. The Heinz Award is considered to be among the largest individual achievement prizes in the world. Two recipients in each of the three categories receive an unrestricted prize of 250,000 and a cast silver medallion. In 2009 through 2011, the Awards instead did a Special Focus on the Environment, and widened the awards to 10 people, each winner receiving 100,000 and a medallion. The Heinz Award medallion displays the likeness of Senator Heinz and the words "Shared Ideals Realized" on its front side, which is a quote from the late Senator He ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
