42,772 articles
Menger's theorem
Menger's theorem is a graph theory result proved by Karl Menger in 1927 equating the maximum number of disjoint paths between two vertices with the minimum separating set.
Menlo Park laboratory
The Menlo Park laboratory was Thomas Edison's research and development facility in Menlo Park, New Jersey, opened in 1876 and regarded as the first industrial research laboratory.
Menny Shalom
Menny Shalom (Hebrew: מני שלום) is an Israeli solid-state chemist and professor at Ben-Gurion University of the Negev who develops carbon nitride and nickel-based electrocatalysts for renewable energy.
Mensa Ponderaria
Mensa ponderaria (plural mensae ponderariae; Greek sekomata): Roman stone or marble tables with standard-volume cavities in public places for checking trade measures. Best examples at Pompeii (VII.7.31, Oscan-to-Roman reworking after 80 BC) and Tivoli (Augustan, funded by freedman Marcus Varenus Diphilus).
Menshutkin reaction
The Menshutkin reaction is the synthesis of a quaternary ammonium salt from a tertiary amine and an alkylating agent, first reported by Nikolai Menshutkin in 1890.
Mental age
Mental age is an intelligence test score expressed as the age of children who typically perform at that level, introduced by Binet and Simon in 1908.
Mental calculation
Mental calculation, also known as mental arithmetic or mental math, is the solving of arithmetic problems entirely in the head without aids such as a calculator or pen and paper.
Mental Measurements Yearbook
The Mental Measurements Yearbook (MMY) is a reference series providing critical professional reviews of commercially available education and psychology tests, first published by Oscar Krisen Buros in 1938.
Menthol
Menthol, also known as levomenthol or peppermint camphor, is a natural compound in mint oils that produces a cooling sensation, used in medicines, candies, and cigarettes.
Menthone
Menthone is a naturally occurring monoterpene ketone with a minty smell, making up about 25% of peppermint oil and serving as a biosynthetic precursor to menthol.
Mentoring networks for women in physics
Mentoring networks for women in physics are organized programs pairing women students and early-career researchers with senior physicists or peer cohorts, from undergraduate recruitment through faculty life.
Mepivacaine
Mepivacaine, sold as Carbocaine and Polocaine, is an amide-type local anesthetic synthesized in 1956 and marketed in 1960, used for dental anesthesia, nerve blocks, and epidural and spinal anesthesia.
Mercator projection
The Mercator projection, also known as the Mercator chart, is a cylindrical map projection presented by Gerardus Mercator in 1569, in which lines of constant bearing are straight.
Mercedeh Khajavikhan
Mercedeh Khajavikhan is a professor of electrical engineering at the University of Southern California working on non-Hermitian, topological photonics, and nanolasers, known for the first PT-symmetric laser.
Mercer's theorem
Mercer's theorem, proved by James Mercer in 1909, states that a continuous symmetric positive semidefinite kernel expands as a uniformly convergent series of eigenfunctions with nonnegative coefficients.
Merchants of Doubt
Merchants of Doubt is a 2010 nonfiction book by Naomi Oreskes and Erik M. Conway documenting how a few scientists sowed doubt on tobacco and climate.
Merck Index
The Merck Index is an English-language encyclopedia of chemicals, drugs, and biologicals, first published by Merck & Co. in 1889 and published by the Royal Society of Chemistry since 2013.
Mercouri G. Kanatzidis
Mercouri G. Kanatzidis, born 1957 in Thessaloniki, Greece, is a Greek-born American inorganic chemist at Northwestern University known for thermoelectric materials, halide perovskite solar cells, and radiation detectors.
Mercuric oxide
Mercuric oxide (mercury(II) oxide, HgO, CAS 21908-53-2, Santar) is a toxic red or yellow inorganic mercury compound that decomposes above 500 °C into mercury and oxygen, formerly used in batteries, paints, and antiseptics.
Mercurous chloride
Mercurous chloride (Hg2Cl2), or calomel, a poorly soluble mercury(I) salt once widely used as a purgative and syphilis treatment, now limited mainly to calomel reference electrodes and subject to pesticide and export bans.
Mercury
Mercury is the smallest planet in the Solar System and the closest to the Sun, a rocky world orbiting every 88 Earth days and named for the Roman messenger god.
Mercury (element)
Mercury, historically called quicksilver (hydrargyrum, meaning liquid silver), is a heavy, silvery metal, symbol Hg and atomic number 80, the only common metal liquid at room temperature and highly toxic.
Mercury (planet)
Mercury, the planet, is the smallest planet and the closest to the Sun, a rocky world with a giant iron core and no moons or rings.
Mercury intrusion porosimetry
Mercury intrusion porosimetry (MIP) forces mercury, a non-wetting liquid, into a solid's pores under pressure to measure pore size distribution, pore volume, surface area, and density.
Mercury sulfide
Mercury sulfide is the inorganic compound HgS, occurring in nature as the red mineral cinnabar and the black metacinnabar, and long used as the pigment vermilion.
Mercury-in-glass thermometer
A mercury-in-glass thermometer, also known as a mercury thermometer, measures temperature through mercury expanding in a graduated glass tube; it was developed by Daniel Gabriel Fahrenheit.
Mercury-vapor lamp
A mercury-vapor lamp is a high-intensity discharge lamp that makes bluish-white light by passing an electric arc through vaporized mercury, used for street lighting since 1901.
Mercury's magnetic field
Mercury's magnetic field is a global dynamo field generated in Mercury's liquid iron core, about 1% as strong as Earth's, making Mercury the only other inner planet with one.
Mercury(II) chloride
Mercury(II) chloride, historically known as corrosive sublimate, is a highly toxic white crystalline mercury compound, once an antiseptic and now mainly a catalyst in vinyl chloride production for PVC.
Mercury(II) iodide
Mercury(II) iodide, or mercuric iodide (HgI2), is a scarlet-red, water-insoluble, poisonous mercury salt and wide-band-gap semiconductor best known for room-temperature X-ray and gamma-ray detectors since the early 1970s.