id int64 39 79M | url stringlengths 32 168 | text stringlengths 7 145k | source stringlengths 2 105 | categories listlengths 1 6 | token_count int64 3 32.2k | subcategories listlengths 0 27 |
|---|---|---|---|---|---|---|
766,244 | https://en.wikipedia.org/wiki/Lead%28II%29%20iodide | Lead(II) iodide (or lead iodide) is a chemical compound with the formula . At room temperature, it is a bright yellow odorless crystalline solid, that becomes orange and red when heated. It was formerly called plumbous iodide.
The compound currently has a few specialized applications, such as the manufacture of solar ... | Lead(II) iodide | [
"Chemistry"
] | 1,274 | [
"Semiconductor materials",
"Inorganic compounds",
"Metal halides",
"Salts"
] |
766,409 | https://en.wikipedia.org/wiki/Network%20theory | In mathematics, computer science and network science, network theory is a part of graph theory. It defines networks as graphs where the vertices or edges possess attributes. Network theory analyses these networks over the symmetric relations or asymmetric relations between their (discrete) components.
Network theory h... | Network theory | [
"Mathematics"
] | 2,734 | [
"Discrete mathematics",
"Graph theory",
"Combinatorics",
"Network theory",
"Mathematical relations"
] |
766,619 | https://en.wikipedia.org/wiki/Cyclonic%20separation | Cyclonic separation is a method of removing particulates from an air, gas or liquid stream, without the use of filters, through vortex separation. When removing particulate matter from liquid, a hydrocyclone is used; while from gas, a gas cyclone is used. Rotational effects and gravity are used to separate mixtures of... | Cyclonic separation | [
"Chemistry",
"Engineering"
] | 1,929 | [
"Separation processes by phases",
"Solid-gas separation",
"Water treatment",
"Chemical engineering",
"Colloids",
"Pollution control technologies",
"Aerosols",
"Environmental engineering",
"Particle technology",
"Waste treatment technology"
] |
766,953 | https://en.wikipedia.org/wiki/Videogrammetry | Videogrammetry is a measurement technology in which the three-dimensional coordinates of points on an object are determined by measurements made in two or more video images taken from different angles. Images can be obtained from two cameras which simultaneously view the object or from successive images captured by the... | Videogrammetry | [
"Physics",
"Mathematics"
] | 102 | [
"Quantity",
"Physical quantities",
"Measurement",
"Size"
] |
767,065 | https://en.wikipedia.org/wiki/Rain%20fade | Rain fade refers primarily to the absorption of a microwave radio frequency (RF) signal by atmospheric rain, snow, or ice, and losses which are especially prevalent at frequencies above 11 GHz. It also refers to the degradation of a signal caused by the electromagnetic interference of the leading edge of a storm front.... | Rain fade | [
"Engineering"
] | 1,171 | [
"Telecommunications engineering",
"Satellite broadcasting"
] |
767,086 | https://en.wikipedia.org/wiki/Cotinine | Cotinine is an alkaloid found in tobacco and is also the predominant metabolite of nicotine, typically used as a biomarker for exposure to tobacco smoke. Cotinine is currently being studied as a treatment for depression, post-traumatic stress disorder (PTSD), schizophrenia, Alzheimer's disease and Parkinson's disease. ... | Cotinine | [
"Chemistry",
"Biology"
] | 1,223 | [
"Pyridine alkaloids",
"Alkaloids by chemical classification",
"Biomarkers"
] |
767,142 | https://en.wikipedia.org/wiki/Access%20Grid | Access Grid is a collection of resources and technologies that enables large format audio and video based collaboration between groups of people in different locations. The Access Grid is an ensemble of resources, including multimedia large-format displays, presentation and interactive environments, and interfaces with... | Access Grid | [
"Technology"
] | 760 | [
"Multimedia"
] |
767,350 | https://en.wikipedia.org/wiki/Nitrophosphate%20process | The nitrophosphate process (also known as the Odda process) is a method for the industrial production of nitrogen fertilizers invented by Erling Johnson in the municipality of Odda, Norway around 1927.
The process involves acidifying phosphate rock with dilute nitric acid to produce a mixture of phosphoric acid and ca... | Nitrophosphate process | [
"Chemistry"
] | 540 | [
"Chemical process engineering",
"Chemical processes",
"nan"
] |
767,937 | https://en.wikipedia.org/wiki/Consensus%20sequence | In molecular biology and bioinformatics, the consensus sequence (or canonical sequence) is the calculated sequence of most frequent residues, either nucleotide or amino acid, found at each position in a sequence alignment. It represents the results of multiple sequence alignments in which related sequences are compared... | Consensus sequence | [
"Engineering",
"Biology"
] | 831 | [
"Bioinformatics",
"Biological engineering"
] |
8,116,008 | https://en.wikipedia.org/wiki/Cohn%20process | The Cohn process, developed by Edwin J. Cohn, is a series of purification steps with the purpose of extracting albumin from blood plasma. The process is based on the differential solubility of albumin and other plasma proteins based on pH, ethanol concentration, temperature, ionic strength, and protein concentration. A... | Cohn process | [
"Chemistry",
"Biology"
] | 2,513 | [
"Biochemistry methods",
"Fractionation",
"Separation processes",
"Biochemical separation processes",
"Medical technology"
] |
8,117,002 | https://en.wikipedia.org/wiki/Newton%E2%80%93Wigner%20localization | Newton–Wigner localization (named after Theodore Duddell Newton and Eugene Wigner) is a scheme for obtaining a position operator for massive relativistic quantum particles. It is known to largely conflict with the Reeh–Schlieder theorem outside of a very limited scope.
The Newton–Wigner position operators 1, 2, 3, ar... | Newton–Wigner localization | [
"Physics"
] | 358 | [
"Quantum field theory",
"Quantum mechanics",
"Quantum physics stubs"
] |
8,120,812 | https://en.wikipedia.org/wiki/Dobson%20ozone%20spectrophotometer | The Dobson spectrophotometer, also known as Dobsonmeter, Dobson spectrometer, or just Dobson is one of the earliest instruments used to measure atmospheric ozone.
History
The Dobson spectrometer was invented in 1924 by British physicist and meteorologist Gordon Dobson. A history of the development of the instrument... | Dobson ozone spectrophotometer | [
"Physics",
"Chemistry",
"Technology",
"Engineering"
] | 933 | [
"Meteorological instrumentation and equipment",
"Spectrum (physical sciences)",
"Oxidizing agents",
"Measuring instruments",
"Ozone",
"Spectrometers",
"Spectroscopy"
] |
8,121,479 | https://en.wikipedia.org/wiki/Quasi-set%20theory | Quasi-set theory is a formal mathematical theory for dealing with collections of objects, some of which may be indistinguishable from one another. Quasi-set theory is mainly motivated by the assumption that certain objects treated in quantum physics are indistinguishable and don't have individuality.
Motivation
The Am... | Quasi-set theory | [
"Physics",
"Mathematics"
] | 1,605 | [
"Mathematical logic",
"Theoretical physics",
"Quantum mechanics",
"Set theory"
] |
8,124,077 | https://en.wikipedia.org/wiki/Transition%20state%20analog | Transition state analogs (transition state analogues), are chemical compounds with a chemical structure that resembles the transition state of a substrate molecule in an enzyme-catalyzed chemical reaction. Enzymes interact with a substrate by means of strain or distortions, moving the substrate towards the transition s... | Transition state analog | [
"Chemistry"
] | 1,210 | [
"Chemical kinetics",
"nan",
"Enzyme kinetics"
] |
3,500,268 | https://en.wikipedia.org/wiki/Metal%20roof | A metal roof is a roofing system featuring metal pieces or tiles exhibiting corrosion resistance, impermeability to water, and long life. It is a component of the building envelope. The metal pieces may be a covering on a structural, non-waterproof roof, or they could be self-supporting sheets.
History
Lead and copper... | Metal roof | [
"Physics",
"Technology",
"Engineering"
] | 2,573 | [
"Structural engineering",
"Building engineering",
"Architecture",
"Structural system",
"Construction",
"Materials",
"Roofs",
"Matter",
"Building materials"
] |
3,502,601 | https://en.wikipedia.org/wiki/EDA%20database | An EDA database is a database specialized for the purpose of electronic design automation. These application specific databases are required because general purpose databases have historically not provided enough performance for EDA applications.
In examining EDA design databases, it is useful to look at EDA tool arc... | EDA database | [
"Technology",
"Engineering"
] | 1,446 | [
"Computer engineering",
"Integrated circuits"
] |
3,502,906 | https://en.wikipedia.org/wiki/Mannheim%20process | The Mannheim process is an industrial process for the production of hydrogen chloride and sodium sulfate from sulfuric acid and sodium chloride. The Mannheim furnace is also used to produce potassium sulfate from potassium chloride. The Mannheim process is a stage in the Leblanc process for the production of sodium ca... | Mannheim process | [
"Chemistry"
] | 330 | [
"Chemical process engineering",
"Chemical processes",
"nan"
] |
3,503,207 | https://en.wikipedia.org/wiki/Multi-core%20processor | A multi-core processor (MCP) is a microprocessor on a single integrated circuit (IC) with two or more separate central processing units (CPUs), called cores to emphasize their multiplicity (for example, dual-core or quad-core). Each core reads and executes program instructions, specifically ordinary CPU instructions (s... | Multi-core processor | [
"Technology",
"Engineering"
] | 6,575 | [
"Computers",
"Computer engineering",
"Computer architecture"
] |
3,503,227 | https://en.wikipedia.org/wiki/Solubility%20chart | A solubility chart is a chart describing whether the ionic compounds formed from different combinations of cations and anions dissolve in or precipitate from solution.
Chart
The following chart shows the solubility of various ionic compounds in water at 1 atm pressure and room temperature (approx. ). "Soluble" means t... | Solubility chart | [
"Chemistry"
] | 182 | [
"Homogeneous chemical mixtures",
"Solutions"
] |
3,503,493 | https://en.wikipedia.org/wiki/Di-tert-butyl%20dicarbonate | Di-tert-butyl dicarbonate is a reagent widely used in organic synthesis. Since this compound can be regarded formally as the acid anhydride derived from a tert-butoxycarbonyl (Boc) group, it is commonly referred to as Boc anhydride. This pyrocarbonate reacts with amines to give N-tert-butoxycarbonyl or so-called Boc de... | Di-tert-butyl dicarbonate | [
"Chemistry"
] | 1,028 | [
"Reagents for organic chemistry"
] |
23,717,143 | https://en.wikipedia.org/wiki/C5H4N4 | {{DISPLAYTITLE:C5H4N4}}
The molecular formula C5H4N4 may refer to:
Purine
Purine analogues
5-Aza-7-deazapurine
Pyridine analogues
Triazolopyridine
4-azidopyridine
Molecular formulas | C5H4N4 | [
"Physics",
"Chemistry"
] | 67 | [
"Molecules",
"Set index articles on molecular formulas",
"Isomerism",
"Molecular formulas",
"Matter"
] |
23,717,161 | https://en.wikipedia.org/wiki/C4H12N2 | {{DISPLAYTITLE:C4H12N2}}
The molecular formula C4H12N2 (molar mass: 88.15 g/mol) may refer to:
Dimethylethylenediamines
1,1-Dimethylethylenediamine
1,2-Dimethylethylenediamine
2,3-Butanediamine
Putrescine
Tetramethylhydrazine
Molecular formulas | C4H12N2 | [
"Physics",
"Chemistry"
] | 91 | [
"Molecules",
"Set index articles on molecular formulas",
"Isomerism",
"Molecular formulas",
"Matter"
] |
23,717,280 | https://en.wikipedia.org/wiki/C5H5NO | {{DISPLAYTITLE:C5H5NO}}
The molecular formula C5H5NO (molar mass: 95.10 g/mol, exact mass: 95.03711 u) may refer to:
Pyridone
2-Pyridone
3-Pyridone
4-Pyridone
Pyridine-N-oxide
Molecular formulas | C5H5NO | [
"Physics",
"Chemistry"
] | 82 | [
"Molecules",
"Set index articles on molecular formulas",
"Isomerism",
"Molecular formulas",
"Matter"
] |
23,717,469 | https://en.wikipedia.org/wiki/C10H10O2 | {{DISPLAYTITLE:C10H10O2}}
The molecular formula C10H10O2 (molar mass : 162.18 g/mol) may refer to:
Benzoylacetone
Isosafrole, 3,4-methylenedioxyphenyl-1-propene
4-Methoxycinnamaldehyde
Methyl cinnamate
Safrole, 3,4-methylenedioxyphenyl-2-propene
4,5-Dihydro-1-benzoxepin-3(2H)-one, a watermelon flavorant | C10H10O2 | [
"Chemistry"
] | 130 | [
"Isomerism",
"Set index articles on molecular formulas"
] |
23,717,479 | https://en.wikipedia.org/wiki/C13H18O7 | {{DISPLAYTITLE:C13H18O7}}
The molecular formula C13H18O7 (molar mass : 286.28 g/mol, react mass : 286.105253 u) may refer to :
Gastrodin, a natural polyphenol found in the orchid Gastrodia elata
Salicin, a natural polyphenol found in willow | C13H18O7 | [
"Chemistry"
] | 84 | [
"Isomerism",
"Set index articles on molecular formulas"
] |
23,717,513 | https://en.wikipedia.org/wiki/C7H6O3 | {{DISPLAYTITLE:C7H6O3}}
The molecular formula C7H6O3 may refer to:
Dihydroxybenzaldehydes
2,4-Dihydroxybenzaldehyde
3,4-Dihydroxybenzaldehyde
Monohydroxybenzoic acids
2-Hydroxybenzoic acid (salicylic acid)
3-Hydroxybenzoic acid
4-Hydroxybenzoic acid
Peroxybenzoic acid
Sesamol | C7H6O3 | [
"Chemistry"
] | 111 | [
"Isomerism",
"Set index articles on molecular formulas"
] |
23,727,664 | https://en.wikipedia.org/wiki/Shanghai%20Stem%20Cell%20Institute | The Shanghai Stem Cell Institute is an institute in Shanghai, People's Republic of China dedicated to stem cell research.
The institute
The institute, located within the Shanghai Jiao Tong University under the School of Medicine faculty, is entirely funded by the government of the People's Republic of China.
In 2007,... | Shanghai Stem Cell Institute | [
"Chemistry",
"Engineering",
"Biology"
] | 419 | [
"Stem cell research",
"Cloning",
"Genetic engineering",
"Translational medicine",
"Tissue engineering",
"Biotechnology organizations"
] |
20,727,645 | https://en.wikipedia.org/wiki/Somatic%20fusion | Somatic fusion, also called protoplast fusion, is a type of genetic modification in plants by which two distinct species of plants are fused together to form a new hybrid plant with the characteristics of both, a somatic hybrid. Hybrids have been produced either between different varieties of the same species (e.g. bet... | Somatic fusion | [
"Chemistry",
"Engineering",
"Biology"
] | 1,586 | [
"Biological engineering",
"Genetic engineering",
"Biotechnology",
"nan",
"Molecular biology",
"Biochemistry"
] |
20,736,184 | https://en.wikipedia.org/wiki/Solidago%20sempervirens | Solidago sempervirens, the seaside goldenrod or salt-marsh goldenrod, is a plant species in the genus Solidago of the family Asteraceae. It is native to eastern North America and parts of the Caribbean. It is an introduced species in the Great Lakes region. Similar plants found in the Azores (now Solidago azorica) are ... | Solidago sempervirens | [
"Chemistry"
] | 531 | [
"Halophytes",
"Salts"
] |
20,740,421 | https://en.wikipedia.org/wiki/Methyl%20cyanoacrylate | Methyl cyanoacrylate (MCA; also sometimes referred to as α-cyanoacrylate or alpha-cyanoacrylate) is an organic compound that contains several functional groups: a methyl ester, a nitrile, and an alkene. It is a colorless liquid with low viscosity. Its chief use is as the main component of cyanoacrylate glues. It can be... | Methyl cyanoacrylate | [
"Chemistry",
"Materials_science"
] | 259 | [
"Lachrymatory agents",
"Monomers",
"Polymer chemistry",
"Chemical weapons"
] |
15,607,775 | https://en.wikipedia.org/wiki/Reaction%20Engines%20LAPCAT%20A2 | The Reaction Engines Limited LAPCAT Configuration A2 (called the LAPCAT A2) is a design study for a hypersonic speed jet airliner intended to provide long range, high capacity commercial transportation.
The aircraft concept was designed, as part of the European Union-funded Long-Term Advanced Propulsion Concepts and ... | Reaction Engines LAPCAT A2 | [
"Physics"
] | 819 | [
"Physical systems",
"Transport",
"Supersonic transports"
] |
15,611,465 | https://en.wikipedia.org/wiki/Magnetic%20Prandtl%20number | The Magnetic Prandtl number (Prm) is a dimensionless quantity occurring in magnetohydrodynamics which approximates the ratio of momentum diffusivity (viscosity) and magnetic diffusivity. It is defined as:
where:
Rem is the magnetic Reynolds number
Re is the Reynolds number
ν is the momentum diffusivity (kinematic ... | Magnetic Prandtl number | [
"Chemistry",
"Engineering"
] | 154 | [
"Piping",
"Magnetohydrodynamics",
"Chemical engineering",
"Fluid dynamics"
] |
15,612,827 | https://en.wikipedia.org/wiki/Bandwidth%20%28computing%29 | In computing, bandwidth is the maximum rate of data transfer across a given path. Bandwidth may be characterized as network bandwidth, data bandwidth, or digital bandwidth.
This definition of bandwidth is in contrast to the field of signal processing, wireless communications, modem data transmission, digital communica... | Bandwidth (computing) | [
"Physics",
"Mathematics",
"Technology",
"Engineering"
] | 1,091 | [
"Temporal quantities",
"Telecommunications engineering",
"Physical quantities",
"Applied mathematics",
"Temporal rates",
"Computer science",
"Information theory"
] |
10,488,043 | https://en.wikipedia.org/wiki/Interferon%20alpha-n3 | Interferon alpha-n3 (Alferon-N) is a medication consisting of purified natural human interferon alpha proteins used for the treatment of genital warts.
References
Immunostimulants
Antiviral drugs | Interferon alpha-n3 | [
"Biology"
] | 50 | [
"Antiviral drugs",
"Biocides"
] |
10,489,186 | https://en.wikipedia.org/wiki/Melamine%20resin | Melamine resin or melamine formaldehyde (also shortened to melamine) is a resin with melamine rings terminated with multiple hydroxyl groups derived from formaldehyde. This thermosetting plastic material is made from melamine and formaldehyde. In its butylated form, it is dissolved in n-butanol and xylene. It is then... | Melamine resin | [
"Physics",
"Chemistry",
"Engineering"
] | 967 | [
"Organic polymers",
"Building engineering",
"Architecture",
"Organic compounds",
"Construction",
"Materials",
"Matter",
"Building materials"
] |
10,491,549 | https://en.wikipedia.org/wiki/Mannitol%20salt%20agar | Mannitol salt agar or MSA is a commonly used selective and differential growth medium in microbiology. It encourages the growth of a group of certain bacteria while inhibiting the growth of others.
It contains a high concentration (about 7.5–10%) of salt (NaCl) which is inhibitory to most bacteria - making MSA selectiv... | Mannitol salt agar | [
"Chemistry",
"Biology"
] | 440 | [
"Biochemistry detection reactions",
"Microbiology equipment",
"Biochemical reactions",
"Microbiology techniques",
"Microbiological media"
] |
10,494,269 | https://en.wikipedia.org/wiki/Bethe%E2%80%93Salpeter%20equation | The Bethe–Salpeter equation (BSE, named after Hans Bethe and Edwin Salpeter) is an integral equation, the solution of which describes the structure of a relativistic two-body (particles) bound state in a covariant formalism quantum field theory (QFT). The equation was first published in 1950 at the end of a paper by Y... | Bethe–Salpeter equation | [
"Physics"
] | 1,628 | [
"Quantum field theory",
"Equations of physics",
"Theoretical physics",
"Eponymous equations of physics",
"Quantum mechanics"
] |
10,495,039 | https://en.wikipedia.org/wiki/Ekanite | Ekanite is an uncommon silicate mineral with chemical formula or . It is a member of the steacyite group. It is among the few gemstones that are naturally radioactive. Most ekanite is mined in Sri Lanka, although deposits also occur in Russia and North America. Clear and well-colored stones are rare as the radioactiv... | Ekanite | [
"Physics"
] | 267 | [
"Materials",
"Gemstones",
"Matter"
] |
10,499,606 | https://en.wikipedia.org/wiki/Slater%27s%20rules | In quantum chemistry, Slater's rules provide numerical values for the effective nuclear charge in a many-electron atom. Each electron is said to experience less than the actual nuclear charge, because of shielding or screening by the other electrons. For each electron in an atom, Slater's rules provide a value for the ... | Slater's rules | [
"Physics",
"Chemistry",
"Materials_science"
] | 989 | [
"Quantum chemistry",
"Quantum mechanics",
"Theoretical chemistry",
"Condensed matter physics",
" molecular",
"Atomic physics",
"Atomic",
"nan",
"Chemical bonding",
" and optical physics"
] |
10,500,138 | https://en.wikipedia.org/wiki/CD4%2B%20T%20cells%20and%20antitumor%20immunity | Understanding of the antitumor immunity role of CD4+ T cells has grown substantially since the late 1990s. CD4+ T cells (mature T-helper cells) play an important role in modulating immune responses to pathogens and tumor cells, and are important in orchestrating overall immune responses.
Immunosurveillance and immunoe... | CD4+ T cells and antitumor immunity | [
"Biology"
] | 5,680 | [
"Immunology"
] |
19,531,744 | https://en.wikipedia.org/wiki/Brinelling | Brinelling is the permanent indentation of a hard surface. It is named after the Brinell scale of hardness, in which a small ball is pushed against a hard surface at a preset level of force, and the depth and diameter of the mark indicates the Brinell hardness of the surface. Brinelling is permanent plastic deformatio... | Brinelling | [
"Physics",
"Chemistry",
"Materials_science",
"Engineering"
] | 1,158 | [
"Tribology",
"Applied and interdisciplinary physics",
"Metallurgy",
"Materials science",
"Surface science",
"nan",
"Mechanical engineering"
] |
19,535,600 | https://en.wikipedia.org/wiki/HMMER | HMMER is a free and commonly used software package for sequence analysis written by Sean Eddy. Its general usage is to identify homologous protein or nucleotide sequences, and to perform sequence alignments. It detects homology by comparing a profile-HMM (a Hidden Markov model constructed explicitly for a particular s... | HMMER | [
"Mathematics",
"Biology"
] | 1,722 | [
"Computational science",
"Applied mathematics",
"Bioinformatics",
"Bioinformatics software"
] |
19,539,938 | https://en.wikipedia.org/wiki/Fr%C3%A9chet%20distance | In mathematics, the Fréchet distance is a measure of similarity between curves that takes into account the location and ordering of the points along the curves. It is named after Maurice Fréchet.
Intuitive definition
Imagine a person traversing a finite curved path while walking their dog on a leash, with the dog tra... | Fréchet distance | [
"Physics",
"Mathematics"
] | 1,348 | [
"Physical quantities",
"Distance",
"Quantity",
"Size",
"Topology",
"Space",
"Geometry",
"Spacetime",
"Wikipedia categories named after physical quantities"
] |
250,001 | https://en.wikipedia.org/wiki/Molecular%20clock | The molecular clock is a figurative term for a technique that uses the mutation rate of biomolecules to deduce the time in prehistory when two or more life forms diverged. The biomolecular data used for such calculations are usually nucleotide sequences for DNA, RNA, or amino acid sequences for proteins.
Early discov... | Molecular clock | [
"Chemistry",
"Biology"
] | 2,834 | [
"Evolutionary processes",
"Molecular evolution",
"Taxonomy (biology)",
"Evolutionary biology concepts",
"Bioinformatics",
"Molecular genetics",
"Molecular biology",
"Phylogenetics"
] |
250,074 | https://en.wikipedia.org/wiki/Binomial%20options%20pricing%20model | In finance, the binomial options pricing model (BOPM) provides a generalizable numerical method for the valuation of options. Essentially, the model uses a "discrete-time" (lattice based) model of the varying price over time of the underlying financial instrument, addressing cases where the closed-form Black–Scholes fo... | Binomial options pricing model | [
"Mathematics"
] | 1,680 | [
"Applied mathematics",
"Mathematical finance"
] |
250,107 | https://en.wikipedia.org/wiki/Pitch%20drop%20experiment | A pitch drop experiment is a long-term experiment which measures the flow of a piece of pitch over many years. "Pitch" is the name for any of a number of highly viscous liquids which appear solid, most commonly bitumen, also known as asphalt. At room temperature, tar pitch flows at a very low rate, taking several years... | Pitch drop experiment | [
"Physics",
"Chemistry",
"Engineering"
] | 1,429 | [
"Physics experiments",
"Chemical engineering",
"Experimental physics",
"Piping",
"Fluid dynamics"
] |
250,178 | https://en.wikipedia.org/wiki/Skewes%27s%20number | In number theory, Skewes's number is the smallest natural number for which the prime-counting function exceeds the logarithmic integral function It is named for the South African mathematician Stanley Skewes who first computed an upper bound on its value.
The exact value of Skewes's number is still not known, but ... | Skewes's number | [
"Mathematics"
] | 1,184 | [
"Discrete mathematics",
"Mathematical objects",
"Large numbers",
"Numbers",
"Number theory"
] |
250,237 | https://en.wikipedia.org/wiki/Effective%20results%20in%20number%20theory | For historical reasons and in order to have application to the solution of Diophantine equations, results in number theory have been scrutinised more than in other branches of mathematics to see if their content is effectively computable. Where it is asserted that some list of integers is finite, the question is whethe... | Effective results in number theory | [
"Mathematics"
] | 894 | [
"Analytic number theory",
"Mathematical objects",
"Equations",
"Diophantine equations",
"Number theory"
] |
250,302 | https://en.wikipedia.org/wiki/Waiting%20room | A waiting room or waiting hall is a building, or more commonly a part of a building or a room, where people sit or stand until the event or appointment for which they are waiting begins.
There are two types of physical waiting room. One has individuals leave for appointments one at a time or in small groups, for insta... | Waiting room | [
"Physics",
"Engineering"
] | 1,466 | [
"Physical quantities",
"Time",
"Rooms",
"Time management",
"Spacetime",
"Architecture"
] |
250,323 | https://en.wikipedia.org/wiki/Covering%20space | In topology, a covering or covering projection is a map between topological spaces that, intuitively, locally acts like a projection of multiple copies of a space onto itself. In particular, coverings are special types of local homeomorphisms. If is a covering, is said to be a covering space or cover of , and is sai... | Covering space | [
"Mathematics"
] | 3,726 | [
"Graph theory",
"Algebraic topology",
"Fields of abstract algebra",
"Topology",
"Mathematical relations",
"Topological graph theory"
] |
250,424 | https://en.wikipedia.org/wiki/Ring%20theory | In algebra, ring theory is the study of rings, algebraic structures in which addition and multiplication are defined and have similar properties to those operations defined for the integers. Ring theory studies the structure of rings; their representations, or, in different language, modules; special classes of rings (... | Ring theory | [
"Mathematics"
] | 3,225 | [
"Mathematical structures",
"Mathematical objects",
"Ring theory",
"Fields of abstract algebra",
"Algebraic structures"
] |
250,438 | https://en.wikipedia.org/wiki/Slag | The general term slag may be a by-product or co-product of smelting (pyrometallurgical) ores and recycled metals depending on the type of material being produced. Slag is mainly a mixture of metal oxides and silicon dioxide. Broadly, it can be classified as ferrous (co-products of processing iron and steel), ferroalloy... | Slag | [
"Physics",
"Chemistry",
"Materials_science"
] | 2,720 | [
"Smelting",
"Metallurgical processes",
"Metallurgy",
"Steelmaking",
"Unsolved problems in physics",
"Metallurgical by-products",
"Amorphous solids"
] |
250,540 | https://en.wikipedia.org/wiki/Rhodopsin | Rhodopsin, also known as visual purple, is a protein encoded by the RHO gene and a G-protein-coupled receptor (GPCR). It is a light-sensitive receptor protein that triggers visual phototransduction in rods. Rhodopsin mediates dim light vision and thus is extremely sensitive to light. When rhodopsin is exposed to light... | Rhodopsin | [
"Chemistry",
"Biology"
] | 2,139 | [
"G protein-coupled receptors",
"Biological pigments",
"Pigmentation",
"Signal transduction"
] |
250,596 | https://en.wikipedia.org/wiki/Qiblih |
In the Baháʼí Faith, the Qiblih (, "direction") is the location to which Baháʼís face when saying their daily obligatory prayers. The Qiblih is fixed at the Shrine of Baháʼu'lláh, near Acre, in present-day Israel; approximately at .
In Bábism the Qiblih was originally identified by the Báb with "the One Whom God wil... | Qiblih | [
"Physics",
"Mathematics"
] | 542 | [
"Topology",
"Space",
"Geometry",
"Spacetime",
"Orientation (geometry)"
] |
250,708 | https://en.wikipedia.org/wiki/Induction%20coil | An induction coil or "spark coil" (archaically known as an inductorium or Ruhmkorff coil after Heinrich Rühmkorff) is a type of transformer used to produce high-voltage pulses from a low-voltage direct current (DC) supply. To create the flux changes necessary to induce voltage in the secondary coil, the direct current... | Induction coil | [
"Physics"
] | 2,539 | [
"Physical phenomena",
"Electrical phenomena",
"Electrical breakdown"
] |
250,815 | https://en.wikipedia.org/wiki/Selectron%20tube | The Selectron was an early form of digital computer memory developed by Jan A. Rajchman and his group at the Radio Corporation of America (RCA) under the direction of Vladimir K. Zworykin. It was a vacuum tube that stored digital data as electrostatic charges using technology similar to the Williams tube storage devic... | Selectron tube | [
"Physics"
] | 2,200 | [
"Vacuum tubes",
"Vacuum",
"Matter"
] |
251,061 | https://en.wikipedia.org/wiki/Glass-ceramic | Glass-ceramics are polycrystalline materials produced through controlled crystallization of base glass, producing a fine uniform dispersion of crystals throughout the bulk material. Crystallization is accomplished by subjecting suitable glasses to a carefully regulated heat treatment schedule, resulting in the nucleati... | Glass-ceramic | [
"Chemistry",
"Materials_science",
"Engineering"
] | 4,003 | [
"Glass engineering and science",
"Glass chemistry",
"Materials science",
"Ceramic materials",
"Ceramic engineering"
] |
251,075 | https://en.wikipedia.org/wiki/Induction%20motor | An induction motor or asynchronous motor is an AC electric motor in which the electric current in the rotor that produces torque is obtained by electromagnetic induction from the magnetic field of the stator winding. An induction motor therefore needs no electrical connections to the rotor. An induction motor's rotor c... | Induction motor | [
"Technology",
"Engineering"
] | 4,470 | [
"Electrical engineering",
"Engines",
"Electric motors"
] |
251,399 | https://en.wikipedia.org/wiki/Observable%20universe | The observable universe is a spherical region of the universe consisting of all matter that can be observed from Earth; the electromagnetic radiation from these objects has had time to reach the Solar System and Earth since the beginning of the cosmological expansion. Assuming the universe is isotropic, the distance t... | Observable universe | [
"Physics",
"Astronomy"
] | 4,963 | [
"Concepts in astronomy",
"Concepts in astrophysics",
"Physical cosmological concepts"
] |
251,712 | https://en.wikipedia.org/wiki/Darwin%20Mounds | Darwin Mounds is a large field of undersea sand mounds situated off the north west coast of Scotland that were first discovered in May 1998. They provide a unique habitat for ancient deep water coral reefs and were found using remote sensing techniques during surveys funded by the oil industry and steered by the joint ... | Darwin Mounds | [
"Physics",
"Biology"
] | 1,020 | [
"Biogeomorphology",
"Applied and interdisciplinary physics",
"Physical oceanography",
"Coral reefs"
] |
251,720 | https://en.wikipedia.org/wiki/Praseodymium | Praseodymium is a chemical element; it has symbol Pr and the atomic number 59. It is the third member of the lanthanide series and is considered one of the rare-earth metals. It is a soft, silvery, malleable and ductile metal, valued for its magnetic, electrical, chemical, and optical properties. It is too reactive to ... | Praseodymium | [
"Physics",
"Chemistry"
] | 4,752 | [
"Chemical elements",
"Redox",
"Reducing agents",
"Atoms",
"Matter"
] |
252,250 | https://en.wikipedia.org/wiki/Orbit%20%28dynamics%29 | In mathematics, specifically in the study of dynamical systems, an orbit is a collection of points related by the evolution function of the dynamical system. It can be understood as the subset of phase space covered by the trajectory of the dynamical system under a particular set of initial conditions, as the system ev... | Orbit (dynamics) | [
"Physics",
"Mathematics"
] | 838 | [
"Mechanics",
"Group actions",
"Symmetry",
"Dynamical systems"
] |
252,329 | https://en.wikipedia.org/wiki/Sequent%20calculus | In mathematical logic, sequent calculus is a style of formal logical argumentation in which every line of a proof is a conditional tautology (called a sequent by Gerhard Gentzen) instead of an unconditional tautology. Each conditional tautology is inferred from other conditional tautologies on earlier lines in a formal... | Sequent calculus | [
"Mathematics"
] | 5,205 | [
"Automated theorem proving",
"Proof theory",
"Mathematical logic",
"Logical calculi",
"Computational mathematics"
] |
23,588,655 | https://en.wikipedia.org/wiki/Acetylenediol | Acetylenediol, or ethynediol, is a chemical substance with formula HO−C≡C−OH (an ynol). It is the diol of acetylene. Acetylenediol is unstable in the condensed phase, although its tautomer glyoxal (CHO)2 is well known.
Detection
Acetylenediol was first observed in the gas-phase by mass spectrometry. The compound was... | Acetylenediol | [
"Chemistry"
] | 619 | [
"Organic compounds",
"Organic compounds with 2 carbon atoms"
] |
23,589,578 | https://en.wikipedia.org/wiki/Assimilative%20capacity | Assimilative capacity is the ability for pollutants to be absorbed by an environment without detrimental effects to the environment or those who use of it. Natural absorption into an environment is achieved through dilution, dispersion and removal through chemical or biological processes. The term assimilative capacity... | Assimilative capacity | [
"Chemistry",
"Engineering",
"Biology",
"Environmental_science"
] | 1,463 | [
"Hydrology",
"Ecology",
"nan",
"Environmental engineering"
] |
6,165,182 | https://en.wikipedia.org/wiki/Lyman-alpha%20blob | In astronomy, a Lyman-alpha blob (LAB) is a huge concentration of a gas emitting the Lyman-alpha emission line. LABs are some of the largest known individual objects in the Universe. Some of these gaseous structures are more than 400,000 light years across. So far they have only been found in the high-redshift univers... | Lyman-alpha blob | [
"Physics",
"Chemistry",
"Astronomy"
] | 486 | [
"Spectrum (physical sciences)",
"Outer space",
"Intergalactic media",
"Astrophysics",
"Astronomical spectroscopy",
"Spectroscopy"
] |
6,165,800 | https://en.wikipedia.org/wiki/Mixer-settler | Mixer settlers are a class of mineral process equipment used in the solvent extraction process. A mixer settler consists of a first stage that mixes the phases together followed by a quiescent settling stage that allows the phases to separate by gravity.
Mixer
A mixing chamber where a mechanical agitator brings in i... | Mixer-settler | [
"Chemistry",
"Engineering"
] | 871 | [
"Chemical equipment",
"nan",
"Separation processes"
] |
6,166,592 | https://en.wikipedia.org/wiki/Hartog%20Plate | Hartog Plate or Dirk Hartog's Plate is either of two pewter plates, although primarily the first, which were left on Dirk Hartog Island on the western coast of Australia before European settlement there. The first plate, left in 1616 by Dutch explorer Dirk Hartog, is the oldest-known artefact of European exploration in... | Hartog Plate | [
"Physics"
] | 1,437 | [
"Metallic objects",
"Physical objects",
"Matter"
] |
6,168,349 | https://en.wikipedia.org/wiki/Electric%20energy%20consumption | Electric energy consumption is energy consumption in the form of electrical energy. About a fifth of global energy is consumed as electricity: for residential, industrial, commercial, transportation and other purposes.
The global electricity consumption in 2022 was 24,398 terawatt-hour (TWh), almost exactly three time... | Electric energy consumption | [
"Physics",
"Engineering",
"Environmental_science"
] | 1,630 | [
"Physical quantities",
"Energy policy",
"Power (physics)",
"Electric power",
"Electrical engineering",
"Environmental social science"
] |
6,168,723 | https://en.wikipedia.org/wiki/Heterodiamond | Heterodiamond is a superhard material containing boron, carbon, and nitrogen (BCN). It is formed at high temperatures and high pressures, e.g., by application of an explosive shock wave to a mixture of diamond and cubic boron nitride (c-BN). The heterodiamond is a polycrystalline material coagulated with nano-crystall... | Heterodiamond | [
"Physics"
] | 254 | [
"Materials stubs",
"Materials",
"Superhard materials",
"Matter"
] |
22,194,510 | https://en.wikipedia.org/wiki/Signorini%20problem | The Signorini problem is an elastostatics problem in linear elasticity: it consists in finding the elastic equilibrium configuration of an anisotropic non-homogeneous elastic body, resting on a rigid frictionless surface and subject only to its mass forces. The name was coined by Gaetano Fichera to honour his teacher, ... | Signorini problem | [
"Physics",
"Materials_science"
] | 2,159 | [
"Physical phenomena",
"Continuum mechanics",
"Elasticity (physics)",
"Deformation (mechanics)",
"Classical mechanics",
"Physical properties"
] |
22,196,872 | https://en.wikipedia.org/wiki/Little%20string%20theory | In theoretical physics, little string theory is a non-gravitational non-local theory in six spacetime dimensions that can be obtained as an effective theory of NS5-branes in the limit in which gravity decouples. Little string theories exhibit T-duality, much like the full string theory.
References
String theory | Little string theory | [
"Astronomy"
] | 66 | [
"String theory",
"Astronomical hypotheses"
] |
22,200,477 | https://en.wikipedia.org/wiki/Ringing%20artifacts | In signal processing, particularly digital image processing, ringing artifacts are artifacts that appear as spurious signals near sharp transitions in a signal. Visually, they appear as bands or "ghosts" near edges; audibly, they appear as "echos" near transients, particularly sounds from percussion instruments; most n... | Ringing artifacts | [
"Technology",
"Engineering"
] | 4,011 | [
"Telecommunications engineering",
"Computer engineering",
"Signal processing"
] |
22,201,177 | https://en.wikipedia.org/wiki/Chlorinated%20polycyclic%20aromatic%20hydrocarbon | Chlorinated polycyclic aromatic hydrocarbons (Cl-PAHs) are a group of compounds comprising polycyclic aromatic hydrocarbons with two or more aromatic rings and one or more chlorine atoms attached to the ring system. Cl-PAHs can be divided into two groups: chloro-substituted PAHs, which have one or more hydrogen atoms s... | Chlorinated polycyclic aromatic hydrocarbon | [
"Chemistry",
"Engineering"
] | 1,202 | [
"Combustion engineering",
"Incineration"
] |
22,202,480 | https://en.wikipedia.org/wiki/Orbital%20propellant%20depot | An orbital propellant depot is a cache of propellant that is placed in orbit around Earth or another body to allow spacecraft or the transfer stage of the spacecraft to be fueled in space. It is one of the types of space resource depots that have been proposed for enabling infrastructure-based space exploration. Many d... | Orbital propellant depot | [
"Chemistry",
"Astronomy"
] | 6,671 | [
"Industry in space",
"Outer space",
"Space applications",
"Industrial gases",
"Chemical process engineering"
] |
22,203,669 | https://en.wikipedia.org/wiki/Schur%27s%20lemma%20%28Riemannian%20geometry%29 | In Riemannian geometry, Schur's lemma is a result that says, heuristically, whenever certain curvatures are pointwise constant then they are forced to be globally constant. The proof is essentially a one-step calculation, which has only one input: the second Bianchi identity.
The Schur lemma for the Ricci tensor
Supp... | Schur's lemma (Riemannian geometry) | [
"Mathematics"
] | 1,358 | [
"Mathematical theorems",
"Space (mathematics)",
"Riemannian manifolds",
"Metric spaces",
"Mathematical problems",
"Lemmas"
] |
4,711,412 | https://en.wikipedia.org/wiki/Hemocyte%20%28invertebrate%20immune%20system%20cell%29 | A hemocyte is a cell that plays a role in the immune system of invertebrates. It is found within the hemolymph.
Hemocytes are phagocytes of invertebrates.
Hemocytes in Drosophila melanogaster can be divided into two categories: embryonic and larval. Embryonic hemocytes are derived from head mesoderm and enter the hem... | Hemocyte (invertebrate immune system cell) | [
"Biology"
] | 474 | [
"Immunology"
] |
4,715,518 | https://en.wikipedia.org/wiki/Isothermal%20titration%20calorimetry | In chemical thermodynamics, isothermal titration calorimetry (ITC) is a physical technique used to determine the thermodynamic parameters of interactions in solution. It is most often used to study the binding of small molecules (such as medicinal compounds) to larger macromolecules (proteins, DNA etc.) in a label-free... | Isothermal titration calorimetry | [
"Physics",
"Chemistry",
"Biology"
] | 2,273 | [
"Biochemistry methods",
"Biochemistry",
"Applied and interdisciplinary physics",
"Biophysics",
"Chemical thermodynamics"
] |
4,716,700 | https://en.wikipedia.org/wiki/3C%2075 | 3C 75 (also called 3C75) is a binary black hole system in the dumbbell-shaped galaxy NGC 1128 in the galaxy cluster Abell 400. It has four relativistic jets, two coming from each accreting supermassive black hole. It is travelling at 1200 kilometers per second, causing the jets to be swept back. 3C 75 may be X-ray sour... | 3C 75 | [
"Physics",
"Astronomy"
] | 173 | [
"Black holes",
"Galaxy stubs",
"Unsolved problems in physics",
"Supermassive black holes",
"Astronomy stubs",
"Constellations",
"Cetus"
] |
4,718,833 | https://en.wikipedia.org/wiki/Eukaryotic%20chromosome%20structure | Eukaryotic chromosome structure refers to the levels of packaging from raw DNA molecules to the chromosomal structures seen during metaphase in mitosis or meiosis. Chromosomes contain long strands of DNA containing genetic information. Compared to prokaryotic chromosomes, eukaryotic chromosomes are much larger in size ... | Eukaryotic chromosome structure | [
"Chemistry",
"Biology"
] | 1,009 | [
"Molecular genetics",
"Molecular biology"
] |
4,719,126 | https://en.wikipedia.org/wiki/Micropatterning | Micropatterning is the art of miniaturisation of patterns. Especially used for electronics, it has recently become a standard in biomaterials engineering and for fundamental research on cellular biology by mean of soft lithography. It generally uses photolithography methods but many techniques have been developed.
In ... | Micropatterning | [
"Materials_science",
"Engineering"
] | 381 | [
"Nanotechnology",
"Materials science",
"Microtechnology",
"Lithography (microfabrication)"
] |
2,554,508 | https://en.wikipedia.org/wiki/Tinplate | Tinplate consists of sheets of steel coated with a thin layer of tin to impede rusting. Before the advent of cheap mild steel, the backing metal (known as "") was wrought iron. While once more widely used, the primary use of tinplate now is the manufacture of tin cans.
In the tinning process, tinplate is made by rolli... | Tinplate | [
"Chemistry",
"Materials_science",
"Mathematics",
"Engineering"
] | 1,986 | [
"Thin film deposition",
"Metallurgical processes",
"Metallurgy",
"Coatings",
"Steelmaking",
"Thin films",
"Materials science",
"nan",
"Planes (geometry)",
"Solid state engineering",
"Metal plating"
] |
2,556,705 | https://en.wikipedia.org/wiki/Schur%27s%20inequality | In mathematics, Schur's inequality, named after Issai Schur,
establishes that for all non-negative real numbers
x, y, z, and t>0,
with equality if and only if x = y = z or two of them are equal and the other is zero. When t is an even positive integer, the inequality holds for all real numbers x, y and z.
When , the ... | Schur's inequality | [
"Mathematics"
] | 327 | [
"Mathematical theorems",
"Binary relations",
"Mathematical relations",
"Inequalities (mathematics)",
"Articles containing proofs",
"Mathematical problems"
] |
2,557,627 | https://en.wikipedia.org/wiki/Curved%20space | Curved space often refers to a spatial geometry which is not "flat", where a flat space has zero curvature, as described by Euclidean geometry. Curved spaces can generally be described by Riemannian geometry, though some simple cases can be described in other ways. Curved spaces play an essential role in general relati... | Curved space | [
"Physics",
"Astronomy"
] | 903 | [
"Astronomical sub-disciplines",
"Theoretical physics",
"Astrophysics",
"General relativity",
"Theory of relativity",
"Physical cosmology"
] |
2,557,692 | https://en.wikipedia.org/wiki/Hobbs%20meter | Hobbs meter is a generic trademark for devices used in aviation to measure the time that an aircraft is in use. The meters typically display hours and tenths of an hour, but there are several ways in which the meter may be activated:
It can measure the time that the electrical system is on. This maximizes the recorde... | Hobbs meter | [
"Technology",
"Engineering"
] | 596 | [
"Avionics",
"Aircraft instruments",
"Measuring instruments"
] |
2,559,736 | https://en.wikipedia.org/wiki/Animal%20studies | Animal studies is a recently recognised field in which animals are studied in a variety of cross-disciplinary ways. Scholars who engage in animal studies may be formally trained in a number of diverse fields, including art history, anthropology, biology, film studies, geography, history, psychology, literary studies, m... | Animal studies | [
"Chemistry",
"Biology"
] | 1,474 | [
"Behavioural sciences",
"Animal testing",
"Behavior"
] |
1,843,447 | https://en.wikipedia.org/wiki/Crank%E2%80%93Nicolson%20method | In numerical analysis, the Crank–Nicolson method is a finite difference method used for numerically solving the heat equation and similar partial differential equations. It is a second-order method in time. It is implicit in time, can be written as an implicit Runge–Kutta method, and it is numerically stable. The metho... | Crank–Nicolson method | [
"Mathematics"
] | 1,928 | [
"Applied mathematics",
"Mathematical analysis",
"Mathematical finance",
"Finite differences"
] |
1,843,913 | https://en.wikipedia.org/wiki/Desert%20ecology | Desert ecology is the study of interactions between both biotic and abiotic components of desert environments. A desert ecosystem is defined by interactions between organisms, the climate in which they live, and any other non-living influences on the habitat. Deserts are arid regions that are generally associated with ... | Desert ecology | [
"Biology"
] | 1,913 | [
"Deserts",
"Ecosystems"
] |
1,844,527 | https://en.wikipedia.org/wiki/Exponential%20dichotomy | In the mathematical theory of dynamical systems, an exponential dichotomy is a property of an equilibrium point that extends the idea of hyperbolicity to non-autonomous systems.
Definition
If
is a linear non-autonomous dynamical system in Rn with fundamental solution matrix Φ(t), Φ(0) = I, then the equilibrium point ... | Exponential dichotomy | [
"Physics",
"Mathematics"
] | 340 | [
"Mechanics",
"Dynamical systems"
] |
1,845,123 | https://en.wikipedia.org/wiki/Chain%20drive | Chain drive is a way of transmitting mechanical power from one place to another. It is often used to convey power to the wheels of a vehicle, particularly bicycles and motorcycles. It is also used in a wide variety of machines besides vehicles.
Most often, the power is conveyed by a roller chain, known as the drive ch... | Chain drive | [
"Physics",
"Engineering"
] | 1,741 | [
"Mechanical power transmission",
"Mechanics",
"Mechanical power control",
"Mechanical engineering"
] |
8,126,986 | https://en.wikipedia.org/wiki/Polyglutamylation | Polyglutamylation is a form of reversible posttranslational modification of glutamate residues seen for example in alpha and beta tubulins, nucleosome assembly proteins NAP1 and NAP2. The γ-carboxy group of glutamate may form peptide-like bond with the amino group of a free glutamate whose α-carboxy group can now be ex... | Polyglutamylation | [
"Chemistry"
] | 213 | [
"Gene expression",
"Biochemical reactions",
"Post-translational modification",
"Structural biology",
"Protein structure"
] |
8,128,733 | https://en.wikipedia.org/wiki/Regulon | In molecular genetics, a regulon is a group of genes that are regulated as a unit, generally controlled by the same regulatory gene that expresses a protein acting as a repressor or activator. This terminology is generally, although not exclusively, used in reference to prokaryotes, whose genomes are often organized in... | Regulon | [
"Chemistry",
"Biology"
] | 461 | [
"Gene expression",
"Molecular genetics",
"Cellular processes",
"Molecular biology",
"Biochemistry"
] |
8,129,403 | https://en.wikipedia.org/wiki/Kinetoplast | A kinetoplast is a network of circular DNA (called kDNA) inside a mitochondrion that contains many copies of the mitochondrial genome. The most common kinetoplast structure is a disk, but they have been observed in other arrangements. Kinetoplasts are only found in Excavata of the class Kinetoplastida. The variation in... | Kinetoplast | [
"Chemistry"
] | 1,993 | [
"Mitochondria",
"Metabolism"
] |
8,134,415 | https://en.wikipedia.org/wiki/Vasculum | A vasculum or a botanical box is a stiff container used by botanists to keep field samples viable for transportation. The main purpose of the vasculum is to transport plants without crushing them and by maintaining a cool, humid environment.
Construction
Vascula are cylinders typically made from tinned and sometimes l... | Vasculum | [
"Biology"
] | 530 | [
"Plants",
"Botany"
] |
23,729,510 | https://en.wikipedia.org/wiki/Einstein%E2%80%93de%20Sitter%20universe | The Einstein–de Sitter universe is a model of the universe proposed by Albert Einstein and Willem de Sitter in 1932. On first learning of Edwin Hubble's discovery of a linear relation between the redshift of the galaxies and their distance, Einstein set the cosmological constant to zero in the Friedmann equations, resu... | Einstein–de Sitter universe | [
"Physics"
] | 583 | [
"General relativity",
"Theory of relativity"
] |
23,729,622 | https://en.wikipedia.org/wiki/C30H50 | {{DISPLAYTITLE:C30H50}}
The molecular formula C30H50 (molar mass: 410.72 g/mol, exact mass: 410.3913 u) may refer to:
Squalene
Hopene
diploptene (Hop-22(29)-ene)
Molecular formulas | C30H50 | [
"Physics",
"Chemistry"
] | 69 | [
"Molecules",
"Set index articles on molecular formulas",
"Isomerism",
"Molecular formulas",
"Matter"
] |
23,732,455 | https://en.wikipedia.org/wiki/Upstream%20open%20reading%20frame | An upstream open reading frame (uORF) is an open reading frame (ORF) within the 5' untranslated region (5'UTR) of an mRNA. uORFs can regulate eukaryotic gene expression. Translation of the uORF typically inhibits downstream expression of the primary ORF. However, in some genes such as yeast GCN4, translation of specifi... | Upstream open reading frame | [
"Chemistry",
"Biology"
] | 227 | [
"Gene expression",
"Molecular genetics",
"Cellular processes",
"Molecular biology",
"Biochemistry"
] |
23,735,926 | https://en.wikipedia.org/wiki/Trojan%20wave%20packet | In physics, a trojan wave packet is a wave packet that is nonstationary and nonspreading. It is part of an artificially created system that consists of a nucleus and one or more electron wave packets, and that is highly excited under a continuous electromagnetic field. Its discovery as one of significant contributions ... | Trojan wave packet | [
"Physics",
"Materials_science",
"Engineering"
] | 1,219 | [
"Applied and interdisciplinary physics",
"Microtechnology",
"Quantum mechanics",
"Materials science",
"Nanoelectronics",
"nan",
"Nanotechnology",
"Microelectronic and microelectromechanical systems",
"Quantum states"
] |
23,736,226 | https://en.wikipedia.org/wiki/Dulong%E2%80%93Petit%20law | The Dulong–Petit law, a thermodynamic law proposed by French physicists Pierre Louis Dulong and Alexis Thérèse Petit, states that the classical expression for the molar specific heat capacity of certain chemical elements is constant for temperatures far from the absolute zero.
In modern terms, Dulong and Petit found... | Dulong–Petit law | [
"Physics",
"Chemistry",
"Materials_science",
"Engineering"
] | 1,407 | [
"Matter",
"Phases of matter",
"Materials science",
"Condensed matter physics",
"Thermodynamics",
"nan",
"Statistical mechanics",
"Laws of thermodynamics"
] |
23,737,949 | https://en.wikipedia.org/wiki/Two-way%20satellite%20time%20and%20frequency%20transfer | Two-way satellite time and frequency transfer (TWSTFT) is a high-precision long distance time and frequency transfer mechanism between time bureaux to determine and distribute time and frequency standards.
TWSTFT is being evaluated as an alternative to be used by the Bureau International des Poids et Mesures in the ... | Two-way satellite time and frequency transfer | [
"Physics",
"Mathematics",
"Engineering"
] | 148 | [
"Telecommunications engineering",
"Physical quantities",
"Time",
"Time stubs",
"Quantity",
"Spacetime",
"Wikipedia categories named after physical quantities",
"Synchronization"
] |
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