42,772 articles
Kyoko Nozaki
Kyoko Nozaki (野崎京子) is a Japanese chemist known for homogeneous catalysis and organometallic chemistry, a professor at the University of Tokyo since 2003 who designs molecular catalysts that put carbon dioxide to use.
Kyoung-Shin Choi
Kyoung-Shin Choi (최경신) is a South Korean electrochemist and professor of chemistry at the University of Wisconsin–Madison, known for bismuth vanadate photoanodes for solar water splitting.
Kyriakos Costa Nicolaou
Kyriakos Costa Nicolaou, also known as K.C. Nicolaou, is a Cypriot-born American organic chemist known for the total synthesis of Taxol and other complex natural products.
Kyshtym disaster
The Kyshtym disaster, also known as the Mayak disaster, was a 1957 chemical explosion of radioactive waste at a Soviet plutonium plant near Ozersk, the third worst nuclear accident in history.
L carvone
L-carvone ((R)-(−)-carvone, CAS 6485-40-1) is the mint-scented levorotatory enantiomer of carvone, 50-65% of spearmint oil, used as a flavoring, fragrance, and EPA-registered biochemical insect repellent; EFSA set no ADI for it.
L dwarf
An L dwarf is the coolest class of star and the warmest class of brown dwarf, with effective temperatures falling from about 2200 K at L0 to 1300 K.
L-arginine
L-arginine, a nitrogen-rich amino acid and nitric oxide precursor (CAS 74-79-3), supplies about 4-5 g/day from food; oral Observed Safe Level 20 g/day; FDA food additive and GRAS; weak performance evidence.
L-infinity
L-infinity, written L^∞, is the Banach space of essentially bounded measurable functions on a measure space, normed by the essential supremum and forming the endpoint of the L^p family.
L-leucine
L-leucine, an essential branched-chain amino acid (C6H13NO2, CAS 61-90-5, E641), stimulates muscle protein synthesis via mTOR; GRAS notices GRN 308 and 523 cover 0.5-3 g per serving in beverages and bars.
L-mode
L-mode, or low-confinement mode, is the baseline tokamak plasma regime in which turbulence-driven transport limits confinement; it was named after the 1982 discovery of the higher-confinement H-mode.
L-system
An L-system, or Lindenmayer system, is a parallel string-rewriting formalism in which every symbol is rewritten at each step, introduced by Aristid Lindenmayer in 1968 to model plant development.
L-theanine
L-theanine (γ-glutamylethylamide, N-ethyl-L-glutamine) is a non-protein amino acid from tea (Camellia sinensis) giving green tea umami taste; produced by extraction, synthesis, or enzymatic transformation; GRAS in the US with a 250 mg/serving notice.
L-Thyronine
L-Thyronine (T0) is the iodine-free parent compound of the thyroid hormones thyroxine (T4) and triiodothyronine (T3), an amino acid with two phenolic rings and the alanine side chain of L-tyrosine.
L. J. Lander
L. J. Lander (Leon J. Lander) was an American mathematician who, with T. R. Parkin, found in 1966 the first counterexample to Euler's sum of powers conjecture.
L. Jan Anton Koster
L. Jan Anton Koster is a Dutch physicist at the University of Groningen, full professor of novel semiconductors and devices since 2022, studying organic semiconductor charge transport.
L. Kent Thomas
L. Kent Thomas, born Leonard Kent Thomas, was an American petroleum engineer who spent 40 years developing reservoir simulators at Phillips 66 and ConocoPhillips in Bartlesville, Oklahoma.
L. M. Milne-Thomson
L. M. Milne-Thomson (Louis Melville Milne-Thomson, 1891–1974) was a British applied mathematician, professor at the Royal Naval College, Greenwich, known for Theoretical Hydrodynamics and the circle theorem.
L. R. Ford, Jr.
L. R. Ford, Jr., full name Lester Randolph Ford, Jr. (1927–2017), was an American mathematician at RAND who co-founded network flow theory with Fulkerson and devised the Ford–Johnson sorting algorithm.
L.E. Borgman
L.E. Borgman (Leon E. Borgman, 1928–2007) was an American statistical oceanographer at the University of Wyoming, elected to the National Academy of Engineering in 1999.
L'Hôpital's rule
L'Hôpital's rule, also called De L'Hospital's Rule, is a calculus theorem for finding limits of quotients in indeterminate forms by differentiating the numerator and denominator separately.
L10-MnGa
L10-MnGa is a rare-earth-free manganese gallium alloy with a tetragonal L1₀ structure and large perpendicular magnetic anisotropy, a candidate for spin-transfer torque memory and permanent magnets.
L1544
L1544 (Lynds 1544) is a prestellar core in the Taurus Molecular Cloud, about 550 light-years away, collapsing to form a star but containing no protostar yet.
L8-BO
L8-BO is a Y6-family small-molecule non-fullerene acceptor, reported in 2021 by Yanming Sun, that with the donor PM6 delivered a then-record 18.32% efficiency in organic solar cells.
La Garita Caldera
La Garita Caldera, also called the La Garita supervolcano, is a large eroded caldera in southwestern Colorado formed about 28 million years ago by the Fish Canyon Tuff supereruption.
La Neuve Formation
La Neuve (gisement de La Neuve) is a late Campanian (Begudian) fossil locality in the Arc syncline, Aix-en-Provence Basin, near Trets, France, yielding sandstone-hosted dinosaur eggshell, theropod teeth, gar fish, mammals, and salamanders; sources give no formal formation name.
La Silla Observatory
La Silla Observatory is an astronomical observatory operated by the European Southern Observatory on La Silla mountain in Chile's Atacama Desert, ESO's first, inaugurated in 1969.
La Superba
La Superba (Y Canum Venaticorum, or Y CVn) is a deeply red J-type carbon star in Canes Venatici, a semi-regular variable about 711 light-years away.
La Vida (book)
La Vida is a 1966 ethnography by Oscar Lewis presenting the life stories of sixteen members of a Puerto Rican family in San Juan and New York.
La-Ce-H superhydrides
La-Ce-H superhydrides are hydrogen-rich superconductors in which lanthanum and cerium share the metal sublattice, synthesized at 100 to 170 GPa with transition temperatures up to 178 K.
La0.6Sr0.4Co0.2Fe0.8O3 (LSCF)
La0.6Sr0.4Co0.2Fe0.8O3 (LSCF) is a strontium- and cobalt-substituted lanthanum ferrite perovskite oxide, the most widely used air electrode for solid oxide fuel cells and electrolysis cells, also studied as a bifunctional oxygen catalyst.