id stringlengths 2 8 | url stringlengths 31 117 | title stringlengths 1 71 | text stringlengths 153 118k | topic stringclasses 4
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537859 | https://en.wikipedia.org/wiki/Police%20dog | Police dog | A police dog, also known as a K-9, is a dog that is trained to assist police and other law enforcement officers. Their duties may include searching for drugs and explosives, locating missing people, finding crime scene evidence, protecting officers and other people, and attacking suspects who flee from officers. The br... | Technology | Agriculture, labor and economy | null |
537990 | https://en.wikipedia.org/wiki/Classical%20swine%20fever | Classical swine fever | Classical swine fever (CSF) or hog cholera (also sometimes called pig plague based on the German word ) is a highly contagious disease of swine (Old World and New World pigs). It has been mentioned as a potential bioweapon.
Clinical signs
Swine fever causes fever, skin lesions, convulsions, splenic infarctions and usu... | Biology and health sciences | Viral diseases | Health |
538005 | https://en.wikipedia.org/wiki/Plateau | Plateau | In geology and physical geography, a plateau (; ; : plateaus or plateaux), also called a high plain or a tableland, is an area of a highland consisting of flat terrain that is raised sharply above the surrounding area on at least one side. Often one or more sides have deep hills or escarpments. Plateaus can be formed b... | Physical sciences | Landforms | null |
538413 | https://en.wikipedia.org/wiki/Friesian%20horse | Friesian horse | The Friesian ( in Dutch; in West Frisian) is a horse breed originating in Friesland in north Netherlands. The breed nearly became extinct on more than one occasion. It is classified as a light draught horse, and the modern day Friesian horse is used for riding and driving. The Friesian horse is most known for its all-... | Biology and health sciences | Horses | null |
539055 | https://en.wikipedia.org/wiki/Share%20taxi | Share taxi | A share taxi, shared taxi, taxibus, or jitney or dollar van in the US, or marshrutka in former Soviet countries, is a mode of transport which falls between a taxicab and a bus. Share taxis are a form of paratransit. They are vehicles for hire and are typically smaller than buses. Share taxis usually take passengers on ... | Technology | Motorized road transport | null |
540093 | https://en.wikipedia.org/wiki/Copenhagen%20Metro | Copenhagen Metro | The Copenhagen Metro (, ) is a light rapid transit system in Copenhagen, Denmark, serving the municipalities of Copenhagen, Frederiksberg, and Tårnby.
The original system opened in October 2002, serving nine stations on two lines: M1 and M2. In 2003 and 2007, the Metro was extended to Vanløse and Copenhagen Airport (... | Technology | Scandinavia | null |
540448 | https://en.wikipedia.org/wiki/Product%20%28chemistry%29 | Product (chemistry) | Products are the species formed from chemical reactions. During a chemical reaction, reactants are transformed into products after passing through a high energy transition state. This process results in the consumption of the reactants. It can be a spontaneous reaction or mediated by catalysts which lower the energy of... | Physical sciences | Reaction | Chemistry |
540869 | https://en.wikipedia.org/wiki/Lindane | Lindane | Lindane, also known as gamma-hexachlorocyclohexane (γ-HCH), gammaxene, Gammallin and benzene hexachloride (BHC), is an organochlorine chemical and an isomer of hexachlorocyclohexane that has been used both as an agricultural insecticide and as a pharmaceutical treatment for lice and scabies.
Lindane is a neurotoxin th... | Technology | Pest and disease control | null |
540979 | https://en.wikipedia.org/wiki/Magnetic%20moment | Magnetic moment | In electromagnetism, the magnetic moment or magnetic dipole moment is the combination of strength and orientation of a magnet or other object or system that exerts a magnetic field. The magnetic dipole moment of an object determines the magnitude of torque the object experiences in a given magnetic field. When the same... | Physical sciences | Magnetostatics | Physics |
541000 | https://en.wikipedia.org/wiki/Siesta | Siesta | A siesta (from Spanish, pronounced and meaning "nap") is a short nap taken in the early afternoon, often after the midday meal. Such a period of sleep is a common tradition in some countries, particularly those in warm-weather zones. The "siesta" can refer to the nap itself, or more generally to a period of the day, g... | Biology and health sciences | Ethology | Biology |
895672 | https://en.wikipedia.org/wiki/Feral%20cat | Feral cat | A feral cat or a stray cat is an unowned domestic cat (Felis catus) that lives outdoors and avoids human contact; it does not allow itself to be handled or touched, and usually remains hidden from humans. Feral cats may breed over dozens of generations and become a local apex predator in urban, savannah and bushland en... | Biology and health sciences | Felines | Animals |
896356 | https://en.wikipedia.org/wiki/Magnetic%20storage | Magnetic storage | Magnetic storage or magnetic recording is the storage of data on a magnetized medium. Magnetic storage uses different patterns of magnetisation in a magnetizable material to store data and is a form of non-volatile memory. The information is accessed using one or more read/write heads.
Magnetic storage media, primar... | Technology | Non-volatile memory | null |
896399 | https://en.wikipedia.org/wiki/Gray%20fox | Gray fox | The gray fox (Urocyon cinereoargenteus), or grey fox, is an omnivorous mammal of the family Canidae, widespread throughout North America and Central America. This species and its only congener, the diminutive island fox (Urocyon littoralis) of the California Channel Islands, are the only living members of the genus Uro... | Biology and health sciences | Canines | Animals |
896497 | https://en.wikipedia.org/wiki/Magazine%20%28firearms%29 | Magazine (firearms) | A magazine, often simply called a mag, is an ammunition storage and feeding device for a repeating firearm, either integral within the gun (internal/fixed magazine) or externally attached (detachable magazine). The magazine functions by holding several cartridges within itself and sequentially pushing each one into a p... | Technology | Mechanisms_2 | null |
897047 | https://en.wikipedia.org/wiki/Arc-fault%20circuit%20interrupter | Arc-fault circuit interrupter | An arc-fault circuit interrupter (AFCI) or arc-fault detection device (AFDD) is a circuit breaker that breaks the circuit when it detects the electric arcs that are a signature of loose connections in home wiring. Loose connections, which can develop over time, can sometimes become hot enough to ignite house fires. An ... | Technology | Electrical protective devices | null |
897091 | https://en.wikipedia.org/wiki/Asteroid%20family | Asteroid family | An asteroid family is a population of asteroids that share similar proper orbital elements, such as semimajor axis, eccentricity, and orbital inclination. The members of the families are thought to be fragments of past asteroid collisions. An asteroid family is a more specific term than asteroid group whose members, w... | Physical sciences | Planetary science | Astronomy |
897567 | https://en.wikipedia.org/wiki/Insemination | Insemination | Insemination is the introduction of sperm (in semen) into a female or hermaphrodite's reproductive system in order to fertilize the ovum through sexual reproduction. The sperm enters into the uterus of a mammal or the oviduct of an oviparous (egg-laying) animal. Female humans and other mammals are inseminated during se... | Biology and health sciences | Animal reproduction | Biology |
897576 | https://en.wikipedia.org/wiki/Adder | Adder | Vipera berus, also known as the common European adder and the common European viper, is a species of venomous snake in the family Viperidae. The species is extremely widespread and can be found throughout much of Europe, and as far as East Asia. There are three recognised subspecies.
Known by a host of common names in... | Biology and health sciences | Reptiles | null |
898503 | https://en.wikipedia.org/wiki/Steam%20%28service%29 | Steam (service) | Steam is a digital distribution service and storefront developed by Valve Corporation. It was launched as a software client in September 2003 to provide game updates automatically for Valve's games and expanded to distributing third-party titles in late 2005. Steam offers various features, such as game server matchmaki... | Technology | Multimedia | null |
5094165 | https://en.wikipedia.org/wiki/African%20swine%20fever%20virus | African swine fever virus | African swine fever virus (ASFV) is a large, double-stranded DNA virus in the Asfarviridae family. It is the causative agent of African swine fever (ASF). The virus causes a hemorrhagic fever with high mortality rates in domestic pigs; some isolates can cause death of animals as quickly as a week after infection. It pe... | Biology and health sciences | Specific viruses | Health |
5095984 | https://en.wikipedia.org/wiki/Ephedra%20%28plant%29 | Ephedra (plant) | Ephedra is a genus of gymnosperm shrubs. The various species of Ephedra are widespread in many arid regions of the world, ranging across southwestern North America, southern Europe, northern Africa, southwest and central Asia, northern China, and western South America. It is the only extant genus in its family, Ephedra... | Biology and health sciences | Gymnosperms (except conifers) | Plants |
20215858 | https://en.wikipedia.org/wiki/Lunar%20south%20pole | Lunar south pole | The lunar south pole is the southernmost point on the Moon. It is of interest to scientists because of the occurrence of water ice in permanently shadowed areas around it. The lunar south pole region features craters that are unique in that the near-constant sunlight does not reach their interior. Such craters are cold... | Physical sciences | Solar System | Astronomy |
2798024 | https://en.wikipedia.org/wiki/Ferricyanide | Ferricyanide | Ferricyanide is the name of the anion [Fe(CN)6]3−. It is also called hexacyanoferrate(III) and in rare, but systematic nomenclature, hexacyanidoferrate(III). The most common salt of this anion is potassium ferricyanide, a red crystalline material that is used as an oxidant in organic chemistry.
Properties
[Fe(CN)6]3−... | Physical sciences | Cyanide salts | Chemistry |
2798040 | https://en.wikipedia.org/wiki/Ferrocyanide | Ferrocyanide | Ferrocyanide is the name of the anion [Fe(CN)6]4−. Salts of this coordination complex give yellow solutions. It is usually available as the salt potassium ferrocyanide, which has the formula K4Fe(CN)6. [Fe(CN)6]4− is a diamagnetic species, featuring low-spin iron(II) center in an octahedral ligand environment. Although... | Physical sciences | Cyanide salts | Chemistry |
2799611 | https://en.wikipedia.org/wiki/Zosterophyll | Zosterophyll | The zosterophylls are a group of extinct land plants that first appeared in the Silurian period. The taxon was first established by Banks in 1968 as the subdivision Zosterophyllophytina; they have since also been treated as the division Zosterophyllophyta or Zosterophyta and the class or plesion Zosterophyllopsida or Z... | Biology and health sciences | Lycophytes | Plants |
2800195 | https://en.wikipedia.org/wiki/Yakhch%C4%81l | Yakhchāl | A yakhchāl ( "ice pit"; yakh meaning "ice" and chāl meaning "pit") is an ancient type of ice house, which also made ice. They are primarily found in the Dasht-e Lut and Dasht-e-Kavir deserts, whose climates range from cold (BWk) to hot (BWh) desert regions.
In present-day Iran, Afghanistan, and Tajikistan, the term ya... | Technology | Heating and cooling | null |
2800677 | https://en.wikipedia.org/wiki/D%C3%A9sir%C3%A9e%20potato | Désirée potato | The Désirée potato (sometimes rendered Desirée or Desiree) is a red-skinned main-crop potato originally bred in the Netherlands in 1962. It has yellow flesh with a distinctive flavour and is a favourite with allotment-holders because of its resistance to drought, and is fairly resistant to disease. It is a versatile, f... | Biology and health sciences | Root vegetables | Plants |
2801560 | https://en.wikipedia.org/wiki/Ocean%20acidification | Ocean acidification | Ocean acidification is the ongoing decrease in the pH of the Earth's ocean. Between 1950 and 2020, the average pH of the ocean surface fell from approximately 8.15 to 8.05. Carbon dioxide emissions from human activities are the primary cause of ocean acidification, with atmospheric carbon dioxide () levels exceeding 42... | Physical sciences | Climate change | Earth science |
30270392 | https://en.wikipedia.org/wiki/Sternum | Sternum | The sternum (: sternums or sterna) or breastbone is a long flat bone located in the central part of the chest. It connects to the ribs via cartilage and forms the front of the rib cage, thus helping to protect the heart, lungs, and major blood vessels from injury. Shaped roughly like a necktie, it is one of the largest... | Biology and health sciences | Skeletal system | Biology |
30275643 | https://en.wikipedia.org/wiki/Belemnitida | Belemnitida | Belemnitida (or belemnites) is an extinct order of squid-like cephalopods that existed from the Late Triassic to Late Cretaceous. Unlike squid, belemnites had an internal skeleton that made up the cone. The parts are, from the arms-most to the tip: the tongue-shaped pro-ostracum, the conical phragmocone, and the pointy... | Biology and health sciences | Cephalopods | Animals |
3756619 | https://en.wikipedia.org/wiki/T-top | T-top | A T-top (UK: T-bar) is an automobile roof with a removable panel on each side of a rigid bar running from the center of one structural bar between pillars to the center of the next structural bar. The panels of a traditional T-top are usually made of auto grade safety glass (tempered or laminated), or acrylic – but the... | Technology | Motorized road transport | null |
3757010 | https://en.wikipedia.org/wiki/Azhdarchidae | Azhdarchidae | Azhdarchidae (from the Persian word , , a dragon-like creature in Persian mythology) is a family of pterosaurs known primarily from the Late Cretaceous Period, though an isolated vertebra apparently from an azhdarchid is known from the Early Cretaceous as well (late Berriasian age, about 140 million years ago). Azhdarc... | Biology and health sciences | Pterosaurs | Animals |
3758115 | https://en.wikipedia.org/wiki/Edge%20contraction | Edge contraction | In graph theory, an edge contraction is an operation that removes an edge from a graph while simultaneously merging the two vertices that it previously joined. Edge contraction is a fundamental operation in the theory of graph minors. Vertex identification is a less restrictive form of this operation.
Definition
The ... | Mathematics | Graph theory | null |
3762639 | https://en.wikipedia.org/wiki/Ice%20pellets | Ice pellets | Ice pellets (Canadian English) or sleet (American English) is a form of precipitation consisting of small, hard, translucent balls of ice. Ice pellets are different from graupel ("soft hail"), which is made of frosty white opaque rime, and from a mixture of rain and snow, which is a slushy liquid or semisolid. Ice pe... | Physical sciences | Precipitation | Earth science |
21294842 | https://en.wikipedia.org/wiki/Spinal%20cord | Spinal cord | The spinal cord is a long, thin, tubular structure made up of nervous tissue that extends from the medulla oblongata in the lower brainstem to the lumbar region of the vertebral column (backbone) of vertebrate animals. The center of the spinal cord is hollow and contains a structure called the central canal, which cont... | Biology and health sciences | Nervous system | null |
21294852 | https://en.wikipedia.org/wiki/Pony | Pony | A pony is a type of small horse, usually measured under a specified height at maturity. Ponies often have thicker coats, manes and tails, compared to larger horses, and proportionally shorter legs, wider barrels, heavier , thicker necks and shorter heads. In modern use, breed registries and horse shows may define a pon... | Biology and health sciences | Horses | null |
21299730 | https://en.wikipedia.org/wiki/Lemon | Lemon | The lemon (Citrus × limon) is a species of small evergreen tree in the Citrus genus of the flowering plant family Rutaceae. The lemon is a hybrid of the citron and the bitter orange. Its origins are uncertain, but some evidence suggests lemons originated during the 1st millennium BC in what is now northeastern India.
... | Biology and health sciences | Sapindales | null |
21304320 | https://en.wikipedia.org/wiki/Quartz%20clock | Quartz clock | Quartz clocks and quartz watches are timepieces that use an electronic oscillator regulated by a quartz crystal to keep time. This crystal oscillator creates a signal with very precise frequency, so that quartz clocks and watches are at least an order of magnitude more accurate than mechanical clocks. Generally, some f... | Technology | Clocks | null |
21304364 | https://en.wikipedia.org/wiki/DOS | DOS | DOS (, ) is a family of disk-based operating systems for IBM PC compatible computers. The DOS family primarily consists of IBM PC DOS and a rebranded version, Microsoft's MS-DOS, both of which were introduced in 1981. Later compatible systems from other manufacturers include DR-DOS (1988), ROM-DOS (1989), PTS-DOS (1993... | Technology | Operating Systems | null |
21304415 | https://en.wikipedia.org/wiki/Sexual%20reproduction | Sexual reproduction | Sexual reproduction is a type of reproduction that involves a complex life cycle in which a gamete (haploid reproductive cells, such as a sperm or egg cell) with a single set of chromosomes combines with another gamete to produce a zygote that develops into an organism composed of cells with two sets of chromosomes (di... | Biology and health sciences | Biological reproduction | null |
21304461 | https://en.wikipedia.org/wiki/Steam | Steam | Steam is water vapour (water in the gas phase), often mixed with air and/or an aerosol of liquid water droplets. This may occur due to evaporation or due to boiling, where heat is applied until water reaches the enthalpy of vaporization. Steam that is saturated or superheated (water vapor) is invisible; however, wet st... | Physical sciences | Water | Chemistry |
21306150 | https://en.wikipedia.org/wiki/Random-access%20memory | Random-access memory | Random-access memory (RAM; ) is a form of electronic computer memory that can be read and changed in any order, typically used to store working data and machine code. A random-access memory device allows data items to be read or written in almost the same amount of time irrespective of the physical location of data ins... | Technology | Data storage | null |
24277294 | https://en.wikipedia.org/wiki/Blossom%20algorithm | Blossom algorithm | In graph theory, the blossom algorithm is an algorithm for constructing maximum matchings on graphs. The algorithm was developed by Jack Edmonds in 1961, and published in 1965. Given a general graph , the algorithm finds a matching such that each vertex in is incident with at most one edge in and is maximized. The ... | Mathematics | Graph theory | null |
32882672 | https://en.wikipedia.org/wiki/Sup%27ung%20Dam | Sup'ung Dam | The Sup'ung Dam (), also referred to as the Shuifeng Dam and originally the Suihō Dam, is a gravity dam on the Yalu River between Kuandian Manchu Autonomous County, Liaoning Province in China and Sakju County, North Pyongan Province in North Korea. The dam was constructed by the Japanese between 1937 and 1943 in order ... | Technology | Dams | null |
28825877 | https://en.wikipedia.org/wiki/Smartwatch | Smartwatch | A smartwatch is a portable wearable computer that resembles a wristwatch. Most modern smartwatches are operated via a touchscreen, and rely on mobile apps that run on a connected device (such as a smartphone) in order to provide core functions.
Early smartwatches were capable of performing basic functions like calcula... | Technology | Computer hardware | null |
28831147 | https://en.wikipedia.org/wiki/Roundness%20%28geology%29 | Roundness (geology) | Roundness is the degree of smoothing due to abrasion of sedimentary particles. It is expressed as the ratio of the average radius of curvature of the edges or corners to the radius of curvature of the maximum inscribed sphere.
Measure of roundness
Rounding, roundness or angularity are terms used to describe the shape... | Physical sciences | Sedimentology | Earth science |
2010826 | https://en.wikipedia.org/wiki/Sodium%20oxide | Sodium oxide | Sodium oxide is a chemical compound with the formula . It is used in ceramics and glasses. It is a white solid but the compound is rarely encountered. Instead "sodium oxide" is used to describe components of various materials such as glasses and fertilizers which contain oxides that include sodium and other elements. S... | Physical sciences | Alkali oxide salts | Chemistry |
2010836 | https://en.wikipedia.org/wiki/Sodium%20peroxide | Sodium peroxide | Sodium peroxide is an inorganic compound with the formula Na2O2. This yellowish solid is the product of sodium ignited in excess oxygen. It is a strong base. This metal peroxide exists in several hydrates and peroxyhydrates including Na2O2·2H2O2·4H2O, Na2O2·2H2O, Na2O2·2H2O2, and Na2O2·8H2O. The octahydrate, which is ... | Physical sciences | Peroxide salts | Chemistry |
2010867 | https://en.wikipedia.org/wiki/Potassium%20peroxide | Potassium peroxide | Potassium peroxide is an inorganic compound with the molecular formula K2O2. It is formed as potassium reacts with oxygen in the air, along with potassium oxide (K2O) and potassium superoxide (KO2).
Potassium peroxide reacts with water to form potassium hydroxide and oxygen:
Properties
Potassium peroxide is a highly... | Physical sciences | Peroxide salts | Chemistry |
2011471 | https://en.wikipedia.org/wiki/Sodium%20perchlorate | Sodium perchlorate | Sodium perchlorate is an inorganic compound with the chemical formula . It consists of sodium cations and perchlorate anions . It is a white crystalline, hygroscopic solid that is highly soluble in water and ethanol. It is usually encountered as sodium perchlorate monohydrate . The compound is noteworthy as the most w... | Physical sciences | Halide oxyanions | Chemistry |
2013229 | https://en.wikipedia.org/wiki/Megazostrodon | Megazostrodon | Megazostrodon is an extinct genus of basal mammaliaforms belonging to the order Morganucodonta. It is approximately 200 million years old. Two species are known: M. rudnerae from the Early Jurassic of Lesotho and South Africa, and M. chenali from the Late Triassic of France.
Discovery
The type species M. rudnerae was ... | Biology and health sciences | Stem-mammals | Animals |
2013448 | https://en.wikipedia.org/wiki/Scrubber | Scrubber | Scrubber systems (e.g. chemical scrubbers, gas scrubbers) are a diverse group of air pollution control devices that can be used to remove some particulates and/or gases from industrial exhaust streams. An early application of a carbon dioxide scrubber was in the submarine the Ictíneo I, in 1859; a role for which they c... | Technology | Food, water and health | null |
2014227 | https://en.wikipedia.org/wiki/Ravine | Ravine | A ravine is a landform that is narrower than a canyon and is often the product of streambank erosion. Ravines are typically classified as larger in scale than gullies, although smaller than valleys. Ravines may also be called a cleuch, dell, ghout (Nevis), gill or ghyll, glen, gorge, kloof (South Africa), and chine (Is... | Physical sciences | Fluvial landforms | Earth science |
5101086 | https://en.wikipedia.org/wiki/Cycle%20track | Cycle track | A cycle track or cycleway (British) or bikeway (mainly North American), sometimes historically referred to as a sidepath, is a separate route for cycles and not motor vehicles. In some cases cycle tracks are also used by other users such as pedestrians and horse riders (see shared-use route). A cycle track can be next ... | Technology | Road infrastructure | null |
1376450 | https://en.wikipedia.org/wiki/Square%20inch | Square inch | A square inch (plural: square inches) is a unit of area, equal to the area of a square with sides of one inch. The following symbols are used to denote square inches:
square in
sq inches, sq inch, sq in
inches/-2, inch/-2, in/-2
inches^2, inch^2, in^2
inches2, inch2, in2 (also denoted by "2)
historic engineering drawi... | Physical sciences | Area | Basics and measurement |
1377614 | https://en.wikipedia.org/wiki/Elevated%20railway | Elevated railway | An elevated railway or elevated train (also known as an el train or el for short) is a railway with the tracks above street level on a viaduct or other elevated structure (usually constructed from steel, cast iron, concrete, or bricks). The railway may be broad-gauge, standard-gauge or narrow-gauge railway, light rail,... | Technology | Rail and cable transport | null |
1378708 | https://en.wikipedia.org/wiki/Sodium%20thiosulfate | Sodium thiosulfate | Sodium thiosulfate (sodium thiosulphate) is an inorganic compound with the formula . Typically it is available as the white or colorless pentahydrate (x = 5), which is a white solid that dissolves well in water. The compound is a reducing agent and a ligand, and these properties underpin its applications.
Uses
Sodium ... | Physical sciences | Sulfuric oxyanions | Chemistry |
1380144 | https://en.wikipedia.org/wiki/Linalool | Linalool | Linalool () refers to two enantiomers of a naturally occurring terpene alcohol found in many flowers and spice plants. Together with geraniol, nerol, citronellol, linalool is one of the rose alcohols. Linalool has multiple commercial applications, the majority of which are based on its pleasant scent (floral, with a to... | Physical sciences | Terpenes and terpenoids | Chemistry |
25686223 | https://en.wikipedia.org/wiki/Symbian | Symbian | Symbian was a mobile operating system (OS) and computing platform designed for smartphones. It was originally developed as a proprietary software OS for personal digital assistants in 1998 by the Symbian Ltd. consortium. Symbian OS is a descendant of Psion's EPOC, and was released exclusively on ARM processors, althoug... | Technology | Operating Systems | null |
25687534 | https://en.wikipedia.org/wiki/Ranina%20ranina | Ranina ranina | Ranina ranina, also known as the Huỳnh Đế crab, (red) frog crab or spanner crab, is a species of crab found throughout tropical and subtropical habitats. It is often fished for its meat.
Description
It may grow up to long, and may weigh up to . The carapace is wider at the front, reddish brown in color, with ten whit... | Biology and health sciences | Crabs and hermit crabs | Animals |
2808556 | https://en.wikipedia.org/wiki/Alpher%E2%80%93Bethe%E2%80%93Gamow%20paper | Alpher–Bethe–Gamow paper | In physical cosmology, the Alpher–Bethe–Gamow paper, or αβγ paper, was created by Ralph Alpher, then a physics PhD student, his advisor George Gamow, and Hans Bethe. The work, which would become the subject of Alpher's PhD dissertation, argued that the Big Bang would create hydrogen, helium and heavier elements in the ... | Physical sciences | Physical cosmology | Astronomy |
898756 | https://en.wikipedia.org/wiki/Basking%20shark | Basking shark | The basking shark (Cetorhinus maximus) is the second-largest living shark and fish, after the whale shark. It is one of three plankton-eating shark species, along with the whale shark and megamouth shark. Typically, basking sharks reach in length. It is usually greyish-brown, with mottled skin, with the inside of the ... | Biology and health sciences | Sharks | Animals |
899115 | https://en.wikipedia.org/wiki/Lunar%20distance | Lunar distance | The instantaneous Earth–Moon distance, or distance to the Moon, is the distance from the center of Earth to the center of the Moon. In contrast, the Lunar distance (LD or ), or Earth–Moon characteristic distance, is a unit of measure in astronomy. More technically, it is the semi-major axis of the geocentric lunar orbi... | Physical sciences | Astronomical | Basics and measurement |
899474 | https://en.wikipedia.org/wiki/Acre-foot | Acre-foot | The acre-foot is a non-SI unit of volume equal to about commonly used in the United States in reference to large-scale water resources, such as reservoirs, aqueducts, canals, sewer flow capacity, irrigation water, and river flows.
An acre-foot equals approximately an eight-lane swimming pool, long, wide and deep.
... | Physical sciences | Volume | Basics and measurement |
899880 | https://en.wikipedia.org/wiki/Sea%20surface%20temperature | Sea surface temperature | Sea surface temperature (or ocean surface temperature) is the temperature of ocean water close to the surface. The exact meaning of surface varies in the literature and in practice. It is usually between and below the sea surface. Sea surface temperatures greatly modify air masses in the Earth's atmosphere within a s... | Physical sciences | Oceanography | Earth science |
899973 | https://en.wikipedia.org/wiki/Definition%20of%20planet | Definition of planet | The definition of the term planet has changed several times since the word was coined by the ancient Greeks. Greek astronomers employed the term (), 'wandering stars', for star-like objects which apparently moved over the sky. Over the millennia, the term has included a variety of different celestial bodies, from the ... | Physical sciences | Planetary science | Astronomy |
900775 | https://en.wikipedia.org/wiki/Taipei%20Metro | Taipei Metro | Taipei Metro (also known as Taipei Mass Rapid Transit (MRT) and branded as Metro Taipei) is a rapid transit system operated by the Taipei Rapid Transit Corporation serving the capital Taipei and New Taipei City in Taiwan.
It was the first rapid transit system to be built on the island. The initial network was approved... | Technology | Asia_2 | null |
900867 | https://en.wikipedia.org/wiki/Drilling | Drilling | Drilling is a cutting process where a drill bit is spun to cut a hole of circular cross-section in solid materials. The drill bit is usually a rotary cutting tool, often multi-point. The bit is pressed against the work-piece and rotated at rates from hundreds to thousands of revolutions per minute. This forces the cutt... | Technology | Hand tools | null |
901291 | https://en.wikipedia.org/wiki/Sodium%20benzoate | Sodium benzoate | Sodium benzoate also known as benzoate of soda is the sodium salt of benzoic acid, widely used as a food preservative (with an E number of E211) and a pickling agent. It appears as a white crystalline chemical with the formula C6H5COONa.
Production
Sodium benzoate is commonly produced by the neutralization of sodium h... | Physical sciences | Organic salts | Chemistry |
902027 | https://en.wikipedia.org/wiki/Orion%20Arm | Orion Arm | The Orion Arm, also known as the Orion–Cygnus Arm, is a minor spiral arm within the Milky Way Galaxy spanning in width and extending roughly in length. This galactic structure encompasses the Solar System, including Earth. It is sometimes referred to by alternate names such as the Local Arm or Orion Bridge, and it wa... | Physical sciences | Milky Way | Astronomy |
902183 | https://en.wikipedia.org/wiki/Double-decker%20bus | Double-decker bus | A double-decker bus or double-deck bus is a bus that has two storeys or decks. Double-deckers are used primarily for commuter transport, but open-top models are used as sightseeing buses for tourists, and there are coaches too for long-distance travel. They appear in many places around the world but are presently most ... | Technology | Motorized road transport | null |
31417095 | https://en.wikipedia.org/wiki/Antenna%20array | Antenna array | An antenna array (or array antenna) is a set of multiple connected antennas which work together as a single antenna, to transmit or receive radio waves. The individual antennas (called elements) are usually connected to a single receiver or transmitter by feedlines that feed the power to the elements in a specific pha... | Technology | Signal transmission | null |
24287300 | https://en.wikipedia.org/wiki/Halobates | Halobates | Halobates or sea skaters are a genus with over 40 species of water striders. Most Halobates species are coastal and typically found in sheltered marine habitats (a habitat where a few other genera of water striders also live), but five live on the surface of the open ocean and only occur near the coast when storms blow... | Biology and health sciences | Hemiptera (true bugs) | Animals |
24295969 | https://en.wikipedia.org/wiki/Applied%20mathematics | Applied mathematics | Applied mathematics is the application of mathematical methods by different fields such as physics, engineering, medicine, biology, finance, business, computer science, and industry. Thus, applied mathematics is a combination of mathematical science and specialized knowledge. The term "applied mathematics" also describ... | Mathematics | Other | null |
541808 | https://en.wikipedia.org/wiki/Paddy%20field | Paddy field | A paddy field is a flooded field of arable land used for growing semiaquatic crops, most notably rice and taro. It originates from the Neolithic rice-farming cultures of the Yangtze River basin in southern China, associated with pre-Austronesian and Hmong-Mien cultures. It was spread in prehistoric times by the expansi... | Technology | Buildings and infrastructure | null |
541900 | https://en.wikipedia.org/wiki/Microbiological%20culture | Microbiological culture | A microbiological culture, or microbial culture, is a method of multiplying microbial organisms by letting them reproduce in predetermined culture medium under controlled laboratory conditions. Microbial cultures are foundational and basic diagnostic methods used as research tools in molecular biology.
The term cultur... | Biology and health sciences | Biology basics | Biology |
542071 | https://en.wikipedia.org/wiki/Anopheles | Anopheles | Anopheles () is a genus of mosquito first described by the German entomologist J. W. Meigen in 1818, and are known as nail mosquitoes and marsh mosquitoes. Many such mosquitoes are vectors of the parasite Plasmodium, a genus of protozoans that cause malaria in birds, reptiles, and mammals, including humans. The Anophel... | Biology and health sciences | Flies (Diptera) | Animals |
542107 | https://en.wikipedia.org/wiki/Schizotypal%20personality%20disorder | Schizotypal personality disorder | Schizotypal personality disorder (StPD or SPD), also known as schizotypal disorder, is a cluster A personality disorder. The Diagnostic and Statistical Manual of Mental Disorders (DSM) describes the disorder specifically as a personality disorder characterized by thought disorder, paranoia, a characteristic form of soc... | Biology and health sciences | Mental disorders | Health |
542241 | https://en.wikipedia.org/wiki/Tetra | Tetra | Tetra is the common name of many small freshwater characiform fishes. Tetras come from Africa, Central America, and South America, belonging to the biological family Characidae and to its former subfamilies Alestidae (the "African tetras") and Lebiasinidae. The Characidae are distinguished from other fish by the presen... | Biology and health sciences | Characiformes | Animals |
542399 | https://en.wikipedia.org/wiki/Binomial%20%28polynomial%29 | Binomial (polynomial) | In algebra, a binomial is a polynomial that is the sum of two terms, each of which is a monomial. It is the simplest kind of a sparse polynomial after the monomials.
Definition
A binomial is a polynomial which is the sum of two monomials. A binomial in a single indeterminate (also known as a univariate binomial) can b... | Mathematics | Basics | null |
542410 | https://en.wikipedia.org/wiki/Thermus%20aquaticus | Thermus aquaticus | Thermus aquaticus is a species of bacteria that can tolerate high temperatures, one of several thermophilic bacteria that belong to the Deinococcota phylum. It is the source of the heat-resistant enzyme Taq DNA polymerase, one of the most important enzymes in molecular biology because of its use in the polymerase chain... | Biology and health sciences | Gram-negative bacteria | Plants |
542465 | https://en.wikipedia.org/wiki/Locus%20%28mathematics%29 | Locus (mathematics) | In geometry, a locus (plural: loci) (Latin word for "place", "location") is a set of all points (commonly, a line, a line segment, a curve or a surface), whose location satisfies or is determined by one or more specified conditions.
The set of the points that satisfy some property is often called the locus of a point ... | Mathematics | Other | null |
543106 | https://en.wikipedia.org/wiki/Enzyme%20unit | Enzyme unit | The enzyme unit, or international unit for enzyme (symbol U, sometimes also IU) is a unit of enzyme's catalytic activity.
1 U (μmol/min) is defined as the amount of the enzyme that catalyzes the conversion of one micromole of substrate per minute under the specified conditions of the assay method.
The specified con... | Physical sciences | Catalytic activity | Basics and measurement |
543301 | https://en.wikipedia.org/wiki/Marten | Marten | A marten is a weasel-like mammal in the genus Martes within the subfamily Guloninae, in the family Mustelidae. They have bushy tails and large paws with partially retractile claws. The fur varies from yellowish to dark brown, depending on the species; it is valued by animal trappers for the fur trade. Martens are slend... | Biology and health sciences | Carnivora | null |
543466 | https://en.wikipedia.org/wiki/Siberian%20tiger | Siberian tiger | The Siberian tiger or Amur tiger is a population of the tiger subspecies Panthera tigris tigris native to Northeast China, the Russian Far East, and possibly North Korea. It once ranged throughout the Korean Peninsula, but currently inhabits mainly the Sikhote-Alin mountain region in south-west Primorye Province in the... | Biology and health sciences | Felines | Animals |
543568 | https://en.wikipedia.org/wiki/Lorentz%20covariance | Lorentz covariance | In relativistic physics, Lorentz symmetry or Lorentz invariance, named after the Dutch physicist Hendrik Lorentz, is an equivalence of observation or observational symmetry due to special relativity implying that the laws of physics stay the same for all observers that are moving with respect to one another within an i... | Physical sciences | Theory of relativity | Physics |
544776 | https://en.wikipedia.org/wiki/Soil%20liquefaction | Soil liquefaction | Soil liquefaction occurs when a cohesionless saturated or partially saturated soil substantially loses strength and stiffness in response to an applied stress such as shaking during an earthquake or other sudden change in stress condition, in which material that is ordinarily a solid behaves like a liquid. In soil mech... | Physical sciences | Geophysics | Earth science |
544934 | https://en.wikipedia.org/wiki/Klebsiella%20pneumoniae | Klebsiella pneumoniae | Klebsiella pneumoniae is a Gram-negative, non-motile, encapsulated, lactose-fermenting, facultative anaerobic, rod-shaped bacterium. It appears as a mucoid lactose fermenter on MacConkey agar.
Although found in the normal flora of the mouth, skin, and intestines, it can cause destructive changes to human and animal lu... | Biology and health sciences | Gram-negative bacteria | Plants |
3766560 | https://en.wikipedia.org/wiki/Entropy%20of%20activation | Entropy of activation | In chemical kinetics, the entropy of activation of a reaction is one of the two parameters (along with the enthalpy of activation) that are typically obtained from the temperature dependence of a reaction rate constant, when these data are analyzed using the Eyring equation of the transition state theory. The standard ... | Physical sciences | Kinetics | Chemistry |
3767418 | https://en.wikipedia.org/wiki/Amchoor | Amchoor | Amchoor or aamchur or amchur, also referred to as mango powder, is a fruity spice powder made from dried unripe green mangoes. A citrusy seasoning, it is mostly produced in India. In addition to its use as a seasoning it adds the nutritional benefits of mangoes when the fresh fruit is out of season.
Preparation
To mak... | Biology and health sciences | Herbs and spices | Plants |
5111982 | https://en.wikipedia.org/wiki/Agricultural%20chemistry | Agricultural chemistry | Agricultural chemistry is the chemistry, especially organic chemistry and biochemistry, as they relate to agriculture. Agricultural chemistry embraces the structures and chemical reactions relevant in the production, protection, and use of crops and livestock. Its applied science and technology aspects are directed t... | Technology | Academic disciplines | null |
21323216 | https://en.wikipedia.org/wiki/Herpes | Herpes | Herpes simplex, often known simply as herpes, is a viral infection caused by the herpes simplex virus. Herpes infections are categorized by the area of the body that is infected. The two major types of herpes are oral herpes and genital herpes, though other forms also exist.
Oral herpes involves the face or mouth. It ... | Biology and health sciences | Infectious disease | null |
2017415 | https://en.wikipedia.org/wiki/Ani%20%28bird%29 | Ani (bird) | The anis are the three species of birds in the genus Crotophaga of the cuckoo family. They are essentially tropical New World birds, although the range of two species just reaches the United States.
Unlike some cuckoos, the anis are not brood parasites, but nest communally, the cup nest being built by several pairs fr... | Biology and health sciences | Cuculiformes and relatives | Animals |
2018701 | https://en.wikipedia.org/wiki/Yellow-green%20algae | Yellow-green algae | Yellow-green algae or the Xanthophyceae (xanthophytes) are an important group of heterokont algae. Most live in fresh water, but some are found in marine and soil habitats. They vary from single-celled flagellates to simple colonial and filamentous forms. Xanthophyte chloroplasts contain the photosynthetic pigments chl... | Biology and health sciences | SAR supergroup | Plants |
2018704 | https://en.wikipedia.org/wiki/Leptostraca | Leptostraca | Leptostraca (from the Greek words for thin and shell) is an order of small, marine crustaceans. Its members, including the well-studied Nebalia, occur throughout the world's oceans and are usually considered to be filter-feeders. It is the only extant order in the subclass Phyllocarida. They are believed to represent t... | Biology and health sciences | Malacostraca | Animals |
2018725 | https://en.wikipedia.org/wiki/Argulidae | Argulidae | The family Argulidae, whose members are commonly known as carp lice or fish lice, are parasitic crustaceans in the class Ichthyostraca. It is the only family in the monotypic subclass Branchiura and the order Arguloida, although a second family, Dipteropeltidae, has been proposed.
Taxonomy
Branchiurans were once tho... | Biology and health sciences | Crustaceans | Animals |
2019834 | https://en.wikipedia.org/wiki/Navy%20bean | Navy bean | The navy bean, haricot bean, pearl haricot bean, Boston bean, white pea bean, or pea bean is a variety of the common bean (Phaseolus vulgaris) native to the Americas, where it was first domesticated. It is a dry white bean that is smaller than many other types of white beans, and has an oval, slightly flattened shape. ... | Biology and health sciences | Pulses | Plants |
2019941 | https://en.wikipedia.org/wiki/Micro%20combined%20heat%20and%20power | Micro combined heat and power | Micro combined heat and power, micro-CHP, μCHP or mCHP is an extension of the idea of cogeneration to the single/multi family home or small office building in the range of up to 50 kW. Usual technologies for the production of heat and power in one common process are e.g. internal combustion engines, micro gas turbines,... | Technology | Power generation | null |
1381306 | https://en.wikipedia.org/wiki/Sweat%20gland | Sweat gland | Sweat glands, also known as sudoriferous or sudoriparous glands, , are small tubular structures of the skin that produce sweat. Sweat glands are a type of exocrine gland, which are glands that produce and secrete substances onto an epithelial surface by way of a duct. There are two main types of sweat glands that diffe... | Biology and health sciences | Exocrine system | Biology |
1381556 | https://en.wikipedia.org/wiki/Chlorocebus | Chlorocebus | Chlorocebus is a genus of medium-sized primates from the family of Old World monkeys. Six species are currently recognized, although some people classify them all as a single species with numerous subspecies. Either way, they make up the entirety of the genus Chlorocebus.
Confusingly, the terms "vervet monkey" and "gr... | Biology and health sciences | Old World monkeys | Animals |
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