text stringlengths 11 320k | source stringlengths 26 161 |
|---|---|
Antimony trichloride is the chemical compound with the formula SbCl 3 . It is a soft colorless solid with a pungent odor and was known to alchemists as butter of antimony .
Antimony trichloride is prepared by reaction of chlorine with antimony , antimony tribromide , antimony trioxide , or antimony trisulfide . It als... | https://en.wikipedia.org/wiki/Antimony_trichloride |
This page provides supplementary chemical data on antimony trioxide .
Also known as Sb 2 O 3 . It has a melting point of 656 °C, and a boiling point of 1550 °C. It is a Cubic Crystal Structure with a
density of 5.2G/Cm3 | https://en.wikipedia.org/wiki/Antimony_trioxide_(data_page) |
Antimycin A (more exactly antimycin A1b ) is a secondary metabolite produced by Streptomyces bacteria [ 1 ] and a member of a group of related compounds called antimycins . Antimycin A is classified as an extremely hazardous substance in the United States, as defined in Section 302 of the U.S. Emergency Planning and C... | https://en.wikipedia.org/wiki/Antimycin_A |
Antinuclear antibodies ( ANAs , also known as antinuclear factor or ANF ) [ 2 ] are autoantibodies that bind to contents of the cell nucleus . In normal individuals, the immune system produces antibodies to foreign proteins ( antigens ) but not to human proteins ( autoantigens ). In some cases, antibodies to human anti... | https://en.wikipedia.org/wiki/Antinuclear_antibody |
Antioxidants are compounds that inhibit oxidation , a chemical reaction that can produce free radicals . Autoxidation leads to degradation of organic compounds, including living matter. [ 1 ] Antioxidants are frequently added to industrial products, such as polymers , fuels , and lubricants , to extend their usable lif... | https://en.wikipedia.org/wiki/Antioxidant |
In biochemistry , two biopolymers are antiparallel if they run parallel to each other but with opposite directionality (alignments). An example is the two complementary strands of a DNA double helix , which run in opposite directions alongside each other.
Nucleic acid molecules have a phosphoryl (5') end and a hydroxy... | https://en.wikipedia.org/wiki/Antiparallel_(biochemistry) |
Antiparasitics are a class of medications which are indicated for the treatment of parasitic diseases , such as those caused by helminths , [ 1 ] amoeba , [ 2 ] ectoparasites , parasitic fungi , [ 3 ] and protozoa , [ 1 ] among others. Antiparasitics target the parasitic agents of the infections by destroying them or i... | https://en.wikipedia.org/wiki/Antiparasitic |
Onia
In particle physics , every type of particle of "ordinary" matter (as opposed to antimatter ) is associated with an antiparticle with the same mass but with opposite physical charges (such as electric charge ). For example, the antiparticle of the electron is the positron (also known as an antielectron). While th... | https://en.wikipedia.org/wiki/Antiparticle |
In mathematics , two points of a sphere (or n-sphere , including a circle ) are called antipodal or diametrically opposite if they are the endpoints of a diameter , a straight line segment between two points on a sphere and passing through its center . [ 1 ]
Given any point on a sphere, its antipodal point is the uniq... | https://en.wikipedia.org/wiki/Antipodal_point |
In chemistry , an enantiomer ( /ɪˈnænti.əmər, ɛ-, -oʊ-/ [ 1 ] ih-NAN-tee-ə-mər ), also known as an optical isomer , [ 2 ] antipode , [ 3 ] or optical antipode , [ 4 ] is one of a pair of molecular entities which are mirror images of each other and non-superposable.
Enantiomer molecules are like right and left hands: o... | https://en.wikipedia.org/wiki/Antipode_(chemistry) |
An antiporter (also called exchanger or counter-transporter ) is an integral membrane protein that uses secondary active transport to move two or more molecules in opposite directions across a phospholipid membrane . It is a type of cotransporter , which means that uses the energetically favorable movement of one molec... | https://en.wikipedia.org/wiki/Antiporter |
Antiprotozoal agents ( ATC code: ATC P01) is a class of pharmaceuticals used in treatment of protozoan infection .
A paraphyletic group , protozoans have little in common with each other. For example, Entamoeba histolytica , a unikont eukaryotic organism, is more closely related to Homo sapiens (humans), which also be... | https://en.wikipedia.org/wiki/Antiprotozoal |
Antiqua et nova ( Latin for 'Ancient and new') is a doctrinal note of the Catholic Church co-issued by the Dicastery for the Doctrine of the Faith and the Dicastery for Culture and Education in January 2025. It addresses the "relationship between artificial intelligence [AI] and human intelligence " and offers reflecti... | https://en.wikipedia.org/wiki/Antiqua_et_nova |
The Antique Gas & Steam Engine Museum ( AGSEM ) is a living history museum founded in 1969. It is located on 55 acres (220,000 m 2 ) of county-owned land at 2040 N Santa Fe Ave. on the outskirts of Vista, California . The museum is a non-profit 501c(3) organization, run by several paid employees along with volunteer he... | https://en.wikipedia.org/wiki/Antique_Gas_and_Steam_Engine_Museum |
The Antique Telescope Society ( ATS ) is a society for people interested in antique telescopes , [ 2 ] binoculars , instruments, books, atlases, etc. [ 3 ] It was established in 1992 [ 4 ] and presently based in Virginia, the USA. [ 5 ]
The society has an annual meeting. [ 6 ] It also publishes the Journal of the Anti... | https://en.wikipedia.org/wiki/Antique_Telescope_Society |
An antique radio is a radio receiving set that is collectible because of its age and rarity.
The first radio receivers used a coherer and sounding board, and were only able to receive continuous wave (CW) transmissions, encoded with Morse code ( wireless telegraphy ). Later transmission and reception of speech became ... | https://en.wikipedia.org/wiki/Antique_radio |
Anti-reticular Cytotoxic Serum is made from the blood of a rabbit that has been injected with homogenized cadaver spleen and rib marrow . In small quantities it can aid animal growth, but is toxic in large doses. It was first developed by Alexander A. Bogomolets in 1936. [ 1 ]
"It was a "miracle" that Professor Bogomo... | https://en.wikipedia.org/wiki/Antireticular_cytotoxic_serum |
In mathematics , the inverse trigonometric functions (occasionally also called antitrigonometric , [ 1 ] cyclometric , [ 2 ] or arcus functions [ 3 ] ) are the inverse functions of the trigonometric functions , under suitably restricted domains . Specifically, they are the inverses of the sine , cosine , tangent , cota... | https://en.wikipedia.org/wiki/Antisecant |
Antisense therapy is a form of treatment that uses antisense oligonucleotides (ASOs) to target messenger RNA (mRNA). ASOs are capable of altering mRNA expression through a variety of mechanisms, including ribonuclease H mediated decay of the pre-mRNA, direct steric blockage, and exon content modulation through splicing... | https://en.wikipedia.org/wiki/Antisense_therapy |
In mathematics , the inverse trigonometric functions (occasionally also called antitrigonometric , [ 1 ] cyclometric , [ 2 ] or arcus functions [ 3 ] ) are the inverse functions of the trigonometric functions , under suitably restricted domains . Specifically, they are the inverses of the sine , cosine , tangent , cota... | https://en.wikipedia.org/wiki/Antisine |
Antisperm antibodies ( ASA ) are antibodies produced against sperm antigens .
Antisperm antibodies are immunoglobulins of IgG , IgA , and/or IgM , which are directed against sperm antigens . ASA can be detected in ejaculate, cervical mucus, follicular fluid, and blood serum of both males and females. [ 1 ] While IgG a... | https://en.wikipedia.org/wiki/Antisperm_antibodies |
An antistatic agent is a compound used for treatment of materials or their surfaces in order to reduce or eliminate buildup of static electricity . Static charge may be generated by the triboelectric effect [ 1 ] or by a non-contact process using a high voltage power source. Static charge may be introduced on a surface... | https://en.wikipedia.org/wiki/Antistatic_agent |
In quantum mechanics , an antisymmetrizer A {\displaystyle {\mathcal {A}}} (also known as an antisymmetrizing operator [ 1 ] ) is a linear operator that makes a wave function of N identical fermions antisymmetric under the exchange of the coordinates of any pair of fermions. After application of A {\displaystyle {\math... | https://en.wikipedia.org/wiki/Antisymmetrizer |
In mathematics , the inverse trigonometric functions (occasionally also called antitrigonometric , [ 1 ] cyclometric , [ 2 ] or arcus functions [ 3 ] ) are the inverse functions of the trigonometric functions , under suitably restricted domains . Specifically, they are the inverses of the sine , cosine , tangent , cota... | https://en.wikipedia.org/wiki/Antitangent |
In pharmacology , an antitarget (or off-target ) is a receptor , enzyme , or other biological target that, when affected by a drug, causes undesirable side-effects . During drug design and development , it is important for pharmaceutical companies to ensure that new drugs do not show significant activity at any of a ra... | https://en.wikipedia.org/wiki/Antitarget |
In molecular biology , antitermination is the prokaryotic cell's aid to fix premature termination during the transcription of RNA . It occurs when the RNA polymerase ignores the termination signal and continues elongating its transcript until a second signal is reached. Antitermination provides a mechanism whereby one ... | https://en.wikipedia.org/wiki/Antitermination |
An antitoxin is an antibody with the ability to neutralize a specific toxin . Antitoxins are produced by certain animals , plants , and bacteria in response to toxin exposure. Although they are most effective in neutralizing toxins, they can also kill bacteria and other microorganisms. Antitoxins are made within organi... | https://en.wikipedia.org/wiki/Antitoxin |
Antitranspirants are compounds applied to the leaves of plants to reduce transpiration . They are used on Christmas trees , on cut flowers , on newly transplanted shrubs , and in other applications to preserve and protect plants from drying out too quickly. They have also been used to protect leaves from salt burn an... | https://en.wikipedia.org/wiki/Antitranspirant |
In mathematics , the inverse trigonometric functions (occasionally also called antitrigonometric , [ 1 ] cyclometric , [ 2 ] or arcus functions [ 3 ] ) are the inverse functions of the trigonometric functions , under suitably restricted domains . Specifically, they are the inverses of the sine , cosine , tangent , cota... | https://en.wikipedia.org/wiki/Antitrigonometric_function |
Antitropical (alternatives include biantitropical or amphitropical ) distribution is a type of disjunct distribution where a species or clade exists at comparable latitudes across the equator but not in the tropics . For example, a species may be found north of the Tropic of Cancer and south of the Tropic of Capricorn ... | https://en.wikipedia.org/wiki/Antitropical_distribution |
In mathematics , an antiunitary transformation is a bijective antilinear map
between two complex Hilbert spaces such that
for all x {\displaystyle x} and y {\displaystyle y} in H 1 {\displaystyle H_{1}} , where the horizontal bar represents the complex conjugate . If additionally one has H 1 = H 2 {\displaystyle H_{1... | https://en.wikipedia.org/wiki/Antiunitary_operator |
An antivector is an element of grade n − 1 in an n -dimensional exterior algebra . [ 1 ] An antivector is always a blade , and it gets its name from the fact that its components each involve a combination of all except one basis vector, thus being the opposite of a vector whose components each involve exactly one basis... | https://en.wikipedia.org/wiki/Antivector |
Antiviral drugs are a class of medication used for treating viral infections . [ 1 ] Most antivirals target specific viruses , while a broad-spectrum antiviral is effective against a wide range of viruses. [ 2 ] Antiviral drugs are a class of antimicrobials , a larger group which also includes antibiotic (also termed a... | https://en.wikipedia.org/wiki/Antiviral_drug |
Antje Töpfer (born 22 May 1968 in Ludwigsfelde , East Germany ) is a German politician from Alliance 90/The Greens . From December 2022 to September 2024 she was State Secretary in the Ministry of Social Affairs, Health, Integration and Consumer Protection of the State of Brandenburg . [ 1 ]
Töpfer graduated from high... | https://en.wikipedia.org/wiki/Antje_Töpfer |
In mathematics , Antoine's necklace is a topological embedding of the Cantor set in 3-dimensional Euclidean space , whose complement is not simply connected . It also serves as a counterexample to the claim that all Cantor spaces are ambiently homeomorphic to each other. It was discovered by Louis Antoine ( 1921 ). [ 1... | https://en.wikipedia.org/wiki/Antoine's_necklace |
Anton is a massively parallel supercomputer designed and built by D. E. Shaw Research in New York, first running in 2008. It is a special-purpose system for molecular dynamics (MD) simulations of proteins and other biological macromolecules. An Anton machine consists of a substantial number of application-specific inte... | https://en.wikipedia.org/wiki/Anton_(computer) |
Anton Kazimirovich Sushkevich (Антон Казимирович Сушкевич) (23 January 1889, Borisoglebsk , Russia — 30 August 1961, Kharkiv , Ukraine) was a Russian mathematician and textbook author who expanded group theory to include semigroups and other magmas .
Sushkevich attended secondary school in Voronezh and studied in Berl... | https://en.wikipedia.org/wiki/Anton_Sushkevich |
The Anton blood group antigen is a cell surface receptor found on some human red blood cells . It has been observed to play a role in Haemophilus influenzae infections. Studies showed that bacterium can adhere to this receptor and cause human red blood cells to agglutinate .
In 1985, this antigen was found to be the s... | https://en.wikipedia.org/wiki/Anton_blood_group_antigen |
Antonella Buccianti (born 1960) is an Italian statistician and earth scientist, known for her work on the statistics of compositional data and its applications in geochemistry and geostatistics . [ 1 ] She is an associate professor in the department of earth sciences at the University of Florence . [ 2 ]
Buccianti was... | https://en.wikipedia.org/wiki/Antonella_Buccianti |
Antonio Vallejo-Nájera (1889–1960) was a Spanish psychiatrist. He was interested in eugenics and proposed a link between Marxism and intellectual disability, something he sought to prove through experimenting on Republican prisoners. His ideas led to the thefts of many Spanish newborns and young children from their lef... | https://en.wikipedia.org/wiki/Antonio_Vallejo-Nájera |
Antozonite (historically known as Stinkspat , Stinkfluss , Stinkstein , Stinkspar [ 1 ] and fetid fluorite [ 2 ] ) is a radioactive fluorite variety first found in Wölsendorf , Bavaria , in 1841, [ 3 ] and named in 1862. [ 4 ]
It is characterized by the presence of multiple inclusions containing elemental fluorine ; [... | https://en.wikipedia.org/wiki/Antozonite |
This is a disambiguation page for the biological term. For the 2018 horror movie, see Antrum (film)
In biology , antrum is a general term for a cavity or chamber, which may have specific meaning in reference to certain organs or sites in the body.
In vertebrates , it may refer specifically to:
In invertebrates , it ... | https://en.wikipedia.org/wiki/Antrum |
Ant–fungus mutualism is a symbiosis seen between certain ant and fungal species, in which ants actively cultivate fungus much like humans farm crops as a food source. There is only evidence of two instances in which this form of agriculture evolved in ants resulting in a dependence on fungi for food. These instances we... | https://en.wikipedia.org/wiki/Ant–fungus_mutualism |
Anuradha Acharya (born 1972) is an Indian entrepreneur. She is the founder and CEO of Ocimum Bio Solutions and Mapmygenome . [ 2 ] She was awarded Young Global Leader by the World Economic Forum in 2011. [ citation needed ]
Acharya was born in Bikaner but spent most of her life in Kharagpur. Acharya graduated from IIT... | https://en.wikipedia.org/wiki/Anuradha_Acharya |
In computer science , an anytime algorithm is an algorithm that can return a valid solution to a problem even if it is interrupted before it ends. The algorithm is expected to find better and better solutions the longer it keeps running.
Most algorithms run to completion: they provide a single answer after performing ... | https://en.wikipedia.org/wiki/Anytime_algorithm |
The aortic bifurcation is the point at which the abdominal aorta bifurcates (forks) into the left and right common iliac arteries . The aortic bifurcation is usually seen at the level of L4 , [ 1 ] just above the junction of the left and right common iliac veins .
The right common iliac artery passes in front of the l... | https://en.wikipedia.org/wiki/Aortic_bifurcation |
Apache Cordova (formerly PhoneGap ) is a mobile application development framework created by Nitobi . Adobe Systems purchased Nitobi in 2011, rebranded it as PhoneGap, and later released an open-source version of the software called Apache Cordova. [ 5 ] Apache Cordova enables software programmers to build hybrid web a... | https://en.wikipedia.org/wiki/Apache_Cordova |
Apama is a complex event processing (CEP) and event stream processing (ESP) engine, developed by Software AG . Apama serves as a platform for performing streaming analytics over a range of high volume/low latency inputs and applications, such as IoT devices, financial exchanges, fraud detection, social media and simila... | https://en.wikipedia.org/wiki/Apama_(software) |
Apamin is an 18 amino acid globular peptide neurotoxin found in apitoxin ( bee venom ). [ 2 ] Dry bee venom consists of 2–3% of apamin. [ 3 ] Apamin selectively blocks SK channels , a type of Ca 2+ -activated K + channel expressed in the central nervous system . Toxicity is caused by only a few amino acids, in particul... | https://en.wikipedia.org/wiki/Apamin |
In constructive mathematics , an apartness relation is a constructive form of inequality, and is often taken to be more basic than equality .
An apartness relation is often written as # {\displaystyle \#} (⧣ in unicode ) to distinguish from the negation of equality (the denial inequality ), which is weaker. In the lit... | https://en.wikipedia.org/wiki/Apartness |
Apdex (Application Performance Index) is an open standard developed by an alliance of companies for measuring performance of software applications in computing . Its purpose is to convert measurements into insights about user satisfaction, by specifying a uniform way to analyze and report on the degree to which measure... | https://en.wikipedia.org/wiki/Apdex |
In geometry , an apeirogon (from Ancient Greek ἄπειρος apeiros ' infinite, boundless ' and γωνία gonia ' angle ' ) or infinite polygon is a polygon with an infinite number of sides. Apeirogons are the rank 2 case of infinite polytopes . In some literature, the term "apeirogon" may refer only to the regular apeirogon, w... | https://en.wikipedia.org/wiki/Apeirogon |
In geometry , an apeirogonal hosohedron or infinite hosohedron [ 1 ] is a tiling of the plane consisting of two vertices at infinity . It may be considered an improper regular tiling of the Euclidean plane, with Schläfli symbol {2,∞}.
The apeirogonal hosohedron is the arithmetic limit of the family of hosohedra {2, p ... | https://en.wikipedia.org/wiki/Apeirogonal_hosohedron |
Apeiron ( / ə ˈ p aɪ ˌ r ɒ n / ; [ 1 ] ἄπειρον ) is a Greek word meaning '(that which is) unlimited; boundless; infinite; indefinite' [ 2 ] from ἀ- a- 'without' and πεῖραρ peirar 'end, limit; boundary', [ 3 ] the Ionic Greek form of πέρας peras 'end, limit, boundary'. [ 4 ]
The apeiron is central to the cosmological t... | https://en.wikipedia.org/wiki/Apeiron |
Apeirophobia (from Ancient Greek : ᾰ̓́πειρος , romanized : ápeiros , lit. 'infinite, boundless') is the phobia of infinity or eternity , causing discomfort and sometimes panic attacks . [ 2 ] It normally starts in adolescence or earlier and it is currently not known how it normally develops over time. Apeirophobia may ... | https://en.wikipedia.org/wiki/Apeirophobia |
An aperture card is a type of punched card with a cut-out window into which a chip of microfilm is mounted. Such a card is used for archiving or for making multiple inexpensive copies of a document for ease of distribution. The card is typically punched with machine-readable metadata associated with the microfilm ima... | https://en.wikipedia.org/wiki/Aperture_card |
Aphasiology is the study of language impairment usually resulting from brain damage , due to neurovascular accident—hemorrhage, stroke—or associated with a variety of neurodegenerative diseases , including different types of dementia . These specific language deficits, termed aphasias , may be defined as impairments o... | https://en.wikipedia.org/wiki/Aphasiology |
The Aphelion Imaging Software Suite is a software suite that includes three base products - Aphelion Lab, Aphelion Dev, and Aphelion SDK for addressing image processing and image analysis applications. The suite also includes a set of extension programs to implement specific vertical applications that benefit from ima... | https://en.wikipedia.org/wiki/Aphelion_(software) |
In chemistry , a trigonal bipyramid formation is a molecular geometry with one atom at the center and 5 more atoms at the corners of a triangular bipyramid . [ 1 ] This is one geometry for which the bond angles surrounding the central atom are not identical (see also pentagonal bipyramid ), because there is no geometri... | https://en.wikipedia.org/wiki/Apical_(chemistry) |
In morphogenesis , apical constriction is the process in which contraction of the apical side of a cell causes the cell to take on a wedged shape. Generally, this shape change is coordinated across many cells of an epithelial layer, generating forces that can bend or fold the cell sheet. [ 1 ]
Apical constriction pla... | https://en.wikipedia.org/wiki/Apical_constriction |
Apicomplexans , a group of intracellular parasites , have life cycle stages that allow them to survive the wide variety of environments they are exposed to during their complex life cycle. [ 1 ] Each stage in the life cycle of an apicomplexan organism is typified by a cellular variety with a distinct morphology and bio... | https://en.wikipedia.org/wiki/Apicomplexan_life_cycle |
Apicophilicity is the phenomenon in which electronegative substituents of trigonal bipyramidal pentacoordinate compounds prefer to occupy apical (axial) positions (L ap ). [ 1 ]
The term "apicophilicity" was first proposed by Earl L. Muetterties in 1963 for the structural analysis of pentacoordinate phosphorus fluorid... | https://en.wikipedia.org/wiki/Apicophilicity |
Aplasia ( / ə ˈ p l eɪ ʒ ə / ⓘ ; from Greek a , "not", "no" + plasis , "formation") is a birth defect where an organ or tissue is wholly or largely absent. It is caused by a defect in a developmental process. [ 1 ] [ 2 ]
Aplastic anemia is the failure of the body to produce blood cells. It may occur at any time, and h... | https://en.wikipedia.org/wiki/Aplasia |
Aplasmomycin is an antibiotic with antimalarial activity isolated from Streptomycete . [ 1 ]
This organic chemistry article is a stub . You can help Wikipedia by expanding it . | https://en.wikipedia.org/wiki/Aplasmomycin |
" Apodictic ", also spelled " apodeictic " ( Ancient Greek : ἀποδεικτικός , "capable of demonstration"), is an adjectival expression from Aristotelean logic that refers to propositions that are demonstrably, necessarily or self-evidently true. [ 1 ] Apodicticity or apodixis is the corresponding abstract noun , referrin... | https://en.wikipedia.org/wiki/Apodicticity |
Apollinaris is a naturally sparkling mineral water from a spring in Bad Neuenahr , Germany. Discovered in 1852, it was popularised in England and on the Continent and became the leading table-water of its time until about World War II. There are many references to it in high and popular culture. Today the brand is o... | https://en.wikipedia.org/wiki/Apollinaris_(water) |
On Christmas Eve , December 24, 1968, the crew of Apollo 8 , the first humans to orbit the Moon, read from the Book of Genesis during a television broadcast. During their ninth orbit of the Moon astronauts Bill Anders , Jim Lovell , and Frank Borman recited verses 1 through 10 of the Genesis creation narrative from the... | https://en.wikipedia.org/wiki/Apollo_8_Genesis_reading |
The Apollo Telescope Mount , or ATM , was a crewed solar observatory that was a part of Skylab , the first American space station . It could observe the Sun in wavelengths ranging from soft X-rays, ultraviolet, and visible light.
The ATM was manually operated by the astronauts aboard Skylab from 1973–74, yielding data... | https://en.wikipedia.org/wiki/Apollo_Telescope_Mount |
In geometry , Apollonius's theorem is a theorem relating the length of a median of a triangle to the lengths of its sides. It states that the sum of the squares of any two sides of any triangle equals twice the square on half the third side, together with twice the square on the median bisecting the third side.
The th... | https://en.wikipedia.org/wiki/Apollonius's_theorem |
Apollonius of Perga ( Ancient Greek : Ἀπολλώνιος ὁ Περγαῖος Apollṓnios ho Pergaîos ; c. 240 BC – c. 190 BC ) was an ancient Greek geometer and astronomer known for his work on conic sections . Beginning from the earlier contributions of Euclid and Archimedes on the topic, he brought them to the state prior to the inven... | https://en.wikipedia.org/wiki/Apollonius_of_Perga |
Apolysis ( Ancient Greek : ἀπόλυσις "discharge, lit. absolution") is the separation of the cuticle from the epidermis in arthropods and related groups ( Ecdysozoa ). Since the cuticle of these animals is also the skeletal support of the body and is inelastic, it is shed during growth and a new covering of larger dimens... | https://en.wikipedia.org/wiki/Apolysis |
This is a page of data for apomorphine . | https://en.wikipedia.org/wiki/Apomorphine_(data_page) |
In phylogenetics , an apomorphy (or derived trait ) is a novel character or character state that has evolved from its ancestral form (or plesiomorphy ). [ 2 ] [ 3 ] [ 4 ] A synapomorphy is an apomorphy shared by two or more taxa and is therefore hypothesized to have evolved in their most recent common ancestor . [ 1 ] ... | https://en.wikipedia.org/wiki/Apomorphy_and_synapomorphy |
A synanthrope (from ancient Greek σύν sýn "together, with" and ἄνθρωπος ánthrōpos "man") is an organism that evolved to live near humans and benefit from human settlements and their environmental modifications (see also anthropophilia for animals who live close to humans as parasites ). The term includes many animals a... | https://en.wikipedia.org/wiki/Apophyte |
Apoplexy (from Ancient Greek ἀποπληξία ( apoplexia ) ' a striking away ' ) refers to the rupture of an internal organ and the associated symptoms. Informally or metaphorically, the term apoplexy is associated with being furious, especially as "apoplectic". Historically, it described what is now known as a hemorrhagic s... | https://en.wikipedia.org/wiki/Apoplexy |
Apoptosis (from Ancient Greek : ἀπόπτωσις , romanized : apóptōsis , lit. 'falling off') is a form of programmed cell death that occurs in multicellular organisms and in some eukaryotic, single-celled microorganisms such as yeast . [ 1 ] Biochemical events lead to characteristic cell changes ( morphology ) and death. [ ... | https://en.wikipedia.org/wiki/Apoptosis |
Apoptotic DNA fragmentation is a key feature of apoptosis , a type of programmed cell death . Apoptosis is characterized by the activation of endogenous endonucleases , particularly the caspase-3 activated DNase (CAD), [ 1 ] with subsequent cleavage of nuclear DNA into internucleosomal fragments of roughly 180 base pai... | https://en.wikipedia.org/wiki/Apoptotic_DNA_fragmentation |
Aporphine alkaloids are naturally occurring chemical compounds from the group of alkaloids . After the benzylisoquinoline alkaloids they are the second largest group of isoquinoline alkaloids.
At least 85 aporphine alkaloids have been isolated from plants of 15 families. The best known representative is apomorphine .... | https://en.wikipedia.org/wiki/Aporphine_alkaloids |
Aposymbiosis occurs when symbiotic organisms live apart from one another (for example, a clownfish living independently of a sea anemone ). Studies have shown that the lifecycles of both the host and the symbiont are affected in some way, usually negative, and that for obligate symbiosis the effects can be drastic. [ ... | https://en.wikipedia.org/wiki/Aposymbiosis |
AppLovin Corporation is an American mobile technology company headquartered in Palo Alto, California . [ 3 ] Founded in 2012, the company helps developers market, monetize, analyze and publish their apps through its mobile advertising, marketing, and analytics platforms MAX, AppDiscovery, and SparkLabs. AppLovin operat... | https://en.wikipedia.org/wiki/AppLovin |
Apparent death [ a ] is a behavior in which animals take on the appearance of being dead . It is an immobile state most often triggered by a predatory attack and can be found in a wide range of animals from insects and crustaceans to mammals, birds, reptiles, amphibians, and fish. [ 1 ] [ 5 ] [ 2 ] Apparent death is se... | https://en.wikipedia.org/wiki/Apparent_death |
Apparent longitude is celestial longitude corrected for aberration and nutation as opposed to mean longitude .
Apparent longitude is used in the definition of equinox and solstice . At equinox, the apparent geocentric celestial longitude of the Sun is 0° or 180°. At solstice, it is equal to 90° or 270°. This does not ... | https://en.wikipedia.org/wiki/Apparent_longitude |
In thermodynamics , an apparent molar property of a solution component in a mixture or solution is a quantity defined with the purpose of isolating the contribution of each component to the non-ideality of the mixture . It shows the change in the corresponding solution property (for example, volume ) per mole of that c... | https://en.wikipedia.org/wiki/Apparent_molar_property |
In freshwater or marine systems apparent oxygen utilization ( AOU ) is the difference between oxygen gas solubility (i.e. the concentration at saturation) and the measured oxygen concentration in water with the same physical and chemical properties. [ 1 ]
A O U = [ O 2 s o l u b i l i t y ] − [ O 2 o b s e r v e d ] {... | https://en.wikipedia.org/wiki/Apparent_oxygen_utilisation |
In fluid mechanics , apparent viscosity (sometimes denoted η ) [ 1 ] is the shear stress applied to a fluid divided by the shear rate :
For a Newtonian fluid , the apparent viscosity is constant, and equal to the Newtonian viscosity of the fluid, but for non-Newtonian fluids , the apparent viscosity depends on the she... | https://en.wikipedia.org/wiki/Apparent_viscosity |
Appcircle Inc. (replacing Smartface Inc.) is a mobile technology company focusing on Mobile DevOps and mobile Continuous Integration and Continuous Delivery for mobile application development , primarily in enterprise settings. Appcircle is headquartered in Delaware with offices in New Jersey, Palo Alto and Istanbul.
... | https://en.wikipedia.org/wiki/Appcircle |
The Appel reaction is an organic reaction that converts an alcohol into an alkyl chloride using triphenylphosphine and carbon tetrachloride . [ 1 ] The use of carbon tetrabromide or bromine as a halide source will yield alkyl bromides, whereas using carbon tetraiodide , methyl iodide or iodine gives alkyl iodides . The... | https://en.wikipedia.org/wiki/Appel_reaction |
In classical mechanics , Appell's equation of motion (aka the Gibbs–Appell equation of motion ) is an alternative general formulation of classical mechanics described by Josiah Willard Gibbs in 1879 [ 1 ] and Paul Émile Appell in 1900. [ 2 ]
The Gibbs-Appell equation reads
where α r = q ¨ r {\displaystyle \alpha _{r}... | https://en.wikipedia.org/wiki/Appell's_equation_of_motion |
In mathematics , an Appell sequence , named after Paul Émile Appell , is any polynomial sequence { p n ( x ) } n = 0 , 1 , 2 , … {\displaystyle \{p_{n}(x)\}_{n=0,1,2,\ldots }} satisfying the identity
and in which p 0 ( x ) {\displaystyle p_{0}(x)} is a non-zero constant.
Among the most notable Appell sequences beside... | https://en.wikipedia.org/wiki/Appell_sequence |
Appery.io is a cloud-based HTML5 , Ionic , jQuery Mobile , and hybrid app-building platform for developing mobile apps, web apps, and PWAs . Appery.io is a browser-based drag-and-drop visual builder tool that supports Android and iOS with integrated Apache Cordova /PhoneGap output. [ 1 ] [ 2 ] [ 3 ] The platform is use... | https://en.wikipedia.org/wiki/Appery.io |
Appetite is the desire to eat food items, usually due to hunger . Appealing foods can stimulate appetite even when hunger is absent, although appetite can be greatly reduced by satiety . [ 1 ] Appetite exists in all higher life-forms, and serves to regulate adequate energy intake to maintain metabolic needs. It is regu... | https://en.wikipedia.org/wiki/Appetite |
The AppleLink Package Compression Format , or AppleLink Package for short, is an obsolete file format used on Apple Inc. 's defunct AppleLink online service as a file transfer and file compression format. It was not particularly efficient and was easily outperformed by contemporary systems like StuffIt and Compact Pro ... | https://en.wikipedia.org/wiki/AppleLink_Package |
Apple Home is a smart home platform developed by Apple Inc. that lets users configure, communicate with and control smart appliances using Apple devices. Apple Home communicates with devices using HomeKit, the software framework and communication protocol developed by Apple, and the open Matter standard. [ 1 ] By desig... | https://en.wikipedia.org/wiki/Apple_Home |
The Apple Multimedia Lab was a pioneering [ 1 ] electronic media research group operated by Apple Computer . It was founded in 1987 by cognitive psychologist Kristina Hooper Woolsey and educational psychologist Sueann Ambron.
This United States media company article is a stub . You can help Wikipedia by expanding it ... | https://en.wikipedia.org/wiki/Apple_Multimedia_Lab |
The Apple Watch is a brand of smartwatch products developed and marketed by Apple . It incorporates fitness tracking , health-oriented capabilities , and wireless telecommunication , and integrates with watchOS and other Apple products and services. The Apple Watch was released in April 2015, [ 5 ] [ 6 ] and quickly be... | https://en.wikipedia.org/wiki/Apple_Watch |
Apple Watch Ultra is a line of sport smartwatches produced by Apple Inc. as part of the Apple Watch product line. Introduced in September 2022, they are marketed towards endurance athletes and outdoor recreation , and carry a rugged form factor with a wider band, a larger, brighter display, multi-band GPS, a larger bat... | https://en.wikipedia.org/wiki/Apple_Watch_Ultra |
The Apple ecosystem is a term used to describe Apple Inc. 's digital ecosystem of products and services, including the iPhone , iPad , Apple Watch , Mac computers, HomePod , and the applications that run on them. [ 1 ] It is often praised for its seamless integration and optimization between various networks of devices... | https://en.wikipedia.org/wiki/Apple_ecosystem |
The Applegate mechanism ( Applegate's mechanism or Applegate effect ) explains long term orbital period variations seen in certain eclipsing binaries . As a main sequence star goes through an activity cycle, the outer layers of the star are subject to a magnetic torque changing the distribution of angular momentum, res... | https://en.wikipedia.org/wiki/Applegate_mechanism |
In chemistry and machine learning , the applicability domain (AD) of a quantitative structure-activity relationship (QSAR) model defines the boundaries within which the model's predictions are considered reliable. It represents the chemical, structural, or biological space covered by the training data used to build the... | https://en.wikipedia.org/wiki/Applicability_domain |
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... | https://en.wikipedia.org/wiki/Applicable_mathematics |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.