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Daniel G. Nocera
Daniel George Nocera (born July 3, 1957) is an American chemist, currently the Patterson Rockwood Professor of Energy in the Department of Chemistry and Chemical Biology at Harvard University. He is a member of the National Academy of Sciences and the American Academy of Arts and Sciences. In 2006 he was described as a "major force in the field of inorganic photochemistry and photophysics". ''Time'' magazine included him in its 2009 list of the 100 most influential people. Nocera has opened up new areas of basic research into the mechanisms of energy conversion in biology and chemistry, including the study of multielectron excited states and proton coupled electron transfer (PCET). He works on research applications in artificial photosynthesis and solar fuels, including an "artificial leaf" that mimics photosynthesis in plants. In 2009, Nocera formed Sun Catalytix, a startup for development of the artificial leaf. The company was bought by Lockheed Martin in 2014. Early life a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Medford, Massachusetts
Medford is a city northwest of downtown Boston on the Mystic River in Middlesex County, Massachusetts, United States. At the time of the 2020 U.S. Census, Medford's population was 59,659. It is home to Tufts University, which has its campus along the Medford and Somerville border. History Indigenous history Native Americans inhabited the area that would become Medford for thousands of years prior to European colonization of the Americas. At the time of European contact and exploration, Medford was the winter home of the Naumkeag people, who farmed corn and created fishing weirs at multiple sites along the Mystic River. Naumkeag sachem Nanepashemet was killed and buried at his fortification in present-day Medford during a war with the Tarrantines in 1619. The contact period introduced a number of European infectious diseases which would decimate native populations in virgin soil epidemics, including a smallpox epidemic which in 1633 which killed Nanepashemet's sons, sachems ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Time (magazine)
''Time'' (stylized in all caps) is an American news magazine based in New York City. For nearly a century, it was published Weekly newspaper, weekly, but starting in March 2020 it transitioned to every other week. It was first published in New York City on March 3, 1923, and for many years it was run by its influential co-founder, Henry Luce. A European edition (''Time Europe'', formerly known as ''Time Atlantic'') is published in London and also covers the Middle East, Africa, and, since 2003, Latin America. An Asian edition (''Time Asia'') is based in Hong Kong. The South Pacific edition, which covers Australia, New Zealand, and the Pacific Islands, is based in Sydney. Since 2018, ''Time'' has been published by Time USA, LLC, owned by Marc Benioff, who acquired it from Meredith Corporation. History ''Time'' has been based in New York City since its first issue published on March 3, 1923, by Briton Hadden and Henry Luce. It was the first weekly news magazine in the United St ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electrochemistry
Electrochemistry is the branch of physical chemistry concerned with the relationship between electrical potential difference, as a measurable and quantitative phenomenon, and identifiable chemical change, with the potential difference as an outcome of a particular chemical change, or vice versa. These reactions involve electrons moving via an electronically-conducting phase (typically an external electrical circuit, but not necessarily, as in electroless plating) between electrodes separated by an ionically conducting and electronically insulating electrolyte (or ionic species in a solution). When a chemical reaction is driven by an electrical potential difference, as in electrolysis, or if a potential difference results from a chemical reaction as in an electric battery or fuel cell, it is called an ''electrochemical'' reaction. Unlike in other chemical reactions, in electrochemical reactions electrons are not transferred directly between atoms, ions, or molecules, but via the af ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spectroscopy
Spectroscopy is the field of study that measures and interprets the electromagnetic spectra that result from the interaction between electromagnetic radiation and matter as a function of the wavelength or frequency of the radiation. Matter waves and acoustic waves can also be considered forms of radiative energy, and recently gravitational waves have been associated with a spectral signature in the context of the Laser Interferometer Gravitational-Wave Observatory (LIGO) In simpler terms, spectroscopy is the precise study of color as generalized from visible light to all bands of the electromagnetic spectrum. Historically, spectroscopy originated as the study of the wavelength dependence of the absorption by gas phase matter of visible light dispersed by a prism. Spectroscopy, primarily in the electromagnetic spectrum, is a fundamental exploratory tool in the fields of astronomy, chemistry, materials science, and physics, allowing the composition, physical structure and e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chemistry
Chemistry is the science, scientific study of the properties and behavior of matter. It is a natural science that covers the Chemical element, elements that make up matter to the chemical compound, compounds made of atoms, molecules and ions: their composition, structure, properties, behavior and the changes they undergo during a Chemical reaction, reaction with other Chemical substance, substances. Chemistry also addresses the nature of chemical bonds in chemical compounds. In the scope of its subject, chemistry occupies an intermediate position between physics and biology. It is sometimes called the central science because it provides a foundation for understanding both Basic research, basic and Applied science, applied scientific disciplines at a fundamental level. For example, chemistry explains aspects of plant growth (botany), the formation of igneous rocks (geology), how atmospheric ozone is formed and how environmental pollutants are degraded (ecology), the properties ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bergenfield, New Jersey
Bergenfield is a Borough (New Jersey), borough in Bergen County, New Jersey, Bergen County, New Jersey, United States. As of the 2020 United States census, the borough's population was 28,321, an increase of 1,557 from the 2010 United States census, 2010 censuscount of 26,764,DP-1 - Profile of General Population and Housing Characteristics: 2010 Demographic Profile Data for Bergenfield borough, Bergen County, New Jersey United States Census Bureau. Accessed May 16, 2012. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bergenfield High School
Bergenfield High School is a four-year, comprehensive public high school serving students in ninth through twelfth grades from Bergenfield, in Bergen County, New Jersey, United States, operating as part of the Bergenfield Public Schools. Bergenfield High School is accredited by the New Jersey Department of Education until July 2028 and has been accredited by the Middle States Association of Colleges and Schools since 1945. As of the 2021–22 school year, the school had an enrollment of 1,220 students and 104.9 classroom teachers (on an FTE basis), for a student–teacher ratio of 11.6:1. There were 262 students (21.5% of enrollment) eligible for free lunch and 103 (8.4% of students) eligible for reduced-cost lunch.School data for Bergenfield High School |
Photosynthesis
Photosynthesis is a process used by plants and other organisms to convert light energy into chemical energy that, through cellular respiration, can later be released to fuel the organism's activities. Some of this chemical energy is stored in carbohydrate molecules, such as sugars and starches, which are synthesized from carbon dioxide and water – hence the name ''photosynthesis'', from the Greek ''phōs'' (), "light", and ''synthesis'' (), "putting together". Most plants, algae, and cyanobacteria perform photosynthesis; such organisms are called photoautotrophs. Photosynthesis is largely responsible for producing and maintaining the oxygen content of the Earth's atmosphere, and supplies most of the energy necessary for life on Earth. Although photosynthesis is performed differently by different species, the process always begins when energy from light is absorbed by proteins called reaction centers that contain green chlorophyll (and other colored) pigments/chromoph ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Solar Fuel
A solar fuel is a synthetic chemical fuel produced from solar energy. Solar fuels can be produced through photochemical (i.e. activation of certain chemical reactions by photons), photobiological (i.e., artificial photosynthesis), thermochemical (i.e., through the use of solar heat supplied by concentrated solar thermal energy to drive a chemical reaction), and electrochemical reactions (i.e. using the electricity from solar panels to drive a chemical reaction). Light is used as an energy source, with solar energy being transduced to chemical energy, typically by reducing protons to hydrogen, or carbon dioxide to organic compounds. A solar fuel can be produced and stored for later use, when sunlight is not available, making it an alternative to fossil fuels and batteries. Examples of such fuels are hydrogen, ammonia, and hydrazine. Diverse photocatalysts are being developed to carry these reactions in a sustainable, environmentally friendly way. Overview The world's dependen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Artificial Photosynthesis
Artificial photosynthesis is a chemical process that biomimics the natural process of photosynthesis to convert sunlight, water, and carbon dioxide into carbohydrates and oxygen. The term artificial photosynthesis is commonly used to refer to any scheme for capturing and storing the energy from sunlight in the chemical bonds of a fuel (a solar fuel). Photocatalytic water splitting converts water into hydrogen and oxygen and is a major research topic of artificial photosynthesis. Light-driven carbon dioxide reduction is another process studied that replicates natural carbon fixation. Research on this topic includes the design and assembly of devices for the direct production of solar fuels, photoelectrochemistry and its application in fuel cells, and the engineering of enzymes and photoautotrophic microorganisms for microbial biofuel and biohydrogen production from sunlight. Overview The photosynthetic reaction can be divided into two half-reactions of oxidation and redu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Proton Coupled Electron Transfer
A Proton-coupled electron transfer (PCET) is a chemical reaction that involves the transfer of electrons and protons from one atom to another. The term was originally coined for single proton, single electron processes that are concerted, but the definition has relaxed to include many related processes. Reactions that involve the concerted shift of a single electron and a single proton are often called Concerted Proton-Electron Transfer or CPET. In PCET, the proton and the electron (i) start from different orbitals and (ii) are transferred to different atomic orbitals. They transfer in a concerted elementary step. CPET contrast to step-wise mechanisms in which the electron and proton are transferred sequentially. :ET : X+ → Xsup>+ + sup>− :PT : X+ → sup>− + Msup>+ :CPET : X+ → + M Examples PCET is thought to be pervasive. Important examples include water oxidation in photosynthesis, nitrogen fixation, oxygen reduction reaction, and the function of hydrogenas ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Clare Grey
Dame Clare Philomena Grey is Geoffrey Moorhouse Gibson Professor in the Department of Chemistry at the University of Cambridge and a Fellow of Pembroke College, Cambridge. Grey uses nuclear magnetic resonance spectroscopy to study and optimize batteries. Education Grey received a Bachelor of Arts degree in 1987 followed by a Doctor of Philosophy degree in chemistry in 1991, both from the University of Oxford. Her doctoral thesis, under the supervision of Anthony Cheetham, used nuclear magnetic resonance (NMR) spectroscopy and magic angle spinning (MAS) to study rare-earth pyrochlores. Career and research Following Grey's graduate studies, she held a postdoctoral research position at the University of Nijmegen. From 1992 to 1993, she worked as a visiting researcher at DuPont. In 1994, Grey was appointed a professor at the State University of New York at Stony Brook, and became full professor in 2001. In 2009, she became the Geoffrey Moorhouse Gibson Professor in Materials C ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
