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In quantum information theory, the Lieb conjecture is a theorem concerning the Wehrl entropy of quantum systems for which the classical phase space is a sphere. It states that no state of such a system has a lower Wehrl entropy than the SU(2) coherent states .
The analogous property for quantum systems for which the ... | https://en.wikipedia.org/wiki/Lieb_conjecture |
The Liebermann reagent named after Hungarian chemist Leo Liebermann (1852-1926) is used as a simple spot-test to presumptively identify alkaloids as well as other compounds. It is composed of a mixture of potassium nitrite and concentrated sulfuric acid . [ 1 ] [ 2 ] 1 g of potassium nitrite is used for every 10 mL of ... | https://en.wikipedia.org/wiki/Liebermann_reagent |
The Liebeskind–Srogl coupling reaction is an organic reaction forming a new carbon–carbon bond from a thioester and a boronic acid using a metal catalyst . It is a cross-coupling reaction . [ 1 ] This reaction was invented by and named after Jiri Srogl from the Academy of Sciences, Czech Republic, and Lanny S. Liebeski... | https://en.wikipedia.org/wiki/Liebeskind–Srogl_coupling |
Liebig–Pasteur dispute is the dispute between Justus von Liebig and Louis Pasteur on the processes and causes of fermentation .
Louis Pasteur a French chemist, supported the idea that fermentation was a biological process. Justus von Liebig , a German chemist, supported the idea that fermentation was a mechanical proc... | https://en.wikipedia.org/wiki/Liebig–Pasteur_dispute |
In physics , the Lieb–Liniger model describes a gas of particles moving in one dimension and satisfying Bose–Einstein statistics . More specifically, it describes a one dimensional Bose gas with Dirac delta interactions. It is named after Elliott H. Lieb and Werner Liniger [ de ] who introduced the model in 1963. [ 1 ]... | https://en.wikipedia.org/wiki/Lieb–Liniger_model |
In quantum chemistry and physics , the Lieb–Oxford inequality provides a lower bound for the indirect part of the Coulomb energy of a quantum mechanical system. It is named after Elliott H. Lieb and Stephen Oxford .
The inequality is of importance for density functional theory and plays a role in the proof of stabilit... | https://en.wikipedia.org/wiki/Lieb–Oxford_inequality |
The Lieb–Robinson bound is a theoretical upper limit on the speed at which information can propagate in non- relativistic quantum systems. It demonstrates that information cannot travel instantaneously in quantum theory, even when the relativity limits of the speed of light are ignored. The existence of such a finite s... | https://en.wikipedia.org/wiki/Lieb–Robinson_bounds |
In mathematics and physics , Lieb–Thirring inequalities provide an upper bound on the sums of powers of the negative eigenvalues of a Schrödinger operator in terms of integrals of the potential. They are named after E. H. Lieb and W. E. Thirring .
The inequalities are useful in studies of quantum mechanics and differe... | https://en.wikipedia.org/wiki/Lieb–Thirring_inequality |
Liesegang rings ( / ˈ l iː z ə ɡ ɑː ŋ / ) are a phenomenon seen in many, if not most, chemical systems undergoing a precipitation reaction under certain conditions of concentration and in the absence of convection . Rings are formed when weakly soluble salts are produced from reaction of two soluble substances, one of ... | https://en.wikipedia.org/wiki/Liesegang_rings |
Lifastuzumab vedotin ( INN ; [ 1 ] development code DNIB0600A ) is an experimental monoclonal antibody-drug conjugate designed for the treatment of cancer. [ 2 ]
This drug was developed by Genentech / Roche .
This monoclonal antibody –related article is a stub . You can help Wikipedia by expanding it . | https://en.wikipedia.org/wiki/Lifastuzumab_vedotin |
Life-cycle cost analysis (LCCA) is an economic analysis tool to determine the most cost-effective option to purchase, run, sustain or dispose of an object or process. The method is popular in helping managers determine economic sustainability by figuring out the life cycle of a product or process.
The term differs sli... | https://en.wikipedia.org/wiki/Life-cycle_cost_analysis |
LifeAct is a 17 amino acid recombinant peptide that stains filamentous actin (F-actin) structures of eukaryotic living or fixed cells. [ 1 ] There are several types and combinations of LifeAct that can be utilized depending on the cell type, protocol, and purpose of the analysis.
Lifeact 17 amino acid sequence is MGVA... | https://en.wikipedia.org/wiki/LifeAct_Dye |
LifeStraw is a brand of water filtration and purification devices. The original LifeStraw was designed as a portable water filter "straw". It filters a maximum of 4,000 litres of water, and enough for one person for three years. It removes almost all waterborne bacteria , microplastics and germs. [ 1 ] A bottle was lat... | https://en.wikipedia.org/wiki/LifeStraw |
Life 3.0: Being Human in the Age of Artificial Intelligence [ 1 ] is a 2017 non-fiction book by Swedish-American cosmologist Max Tegmark . Life 3.0 discusses artificial intelligence (AI) and its impact on the future of life on Earth and beyond. The book discusses a variety of societal implications, what can be done to ... | https://en.wikipedia.org/wiki/Life_3.0 |
The publication Life Safety Code , known as NFPA 101, is a consensus standard widely adopted in the United States. [ clarification needed ] It is administered, trademarked, copyrighted, and published by the National Fire Protection Association and, like many NFPA documents, is systematically revised on a three-year cyc... | https://en.wikipedia.org/wiki/Life_Safety_Code |
Life Sciences Foundation ( LSF ) was a San Francisco-based nonprofit organization that was established in 2011 to collect, preserve, interpret, and promote the history of biotechnology . [ 2 ] [ 3 ] LSF conducted historical research, maintained archives and published historically relevant materials and information. [ ... | https://en.wikipedia.org/wiki/Life_Sciences_Foundation |
Life Sciences Greenhouse of Central Pennsylvania ( LSGPA ) is a biotechnology initiative and non-profit organization based in Harrisburg, Pennsylvania . It was founded in 2001. It focuses on in the advancement of life sciences through technology to improve the healthcare and economic opportunities of Pennsylvanians.
T... | https://en.wikipedia.org/wiki/Life_Sciences_Greenhouse_of_Central_Pennsylvania |
The Life Sciences Research Foundation ( LSRF ) is a postdoctoral fellowship program, with missions "to identify and fund exceptional young scientists at a critical juncture of their training in all areas of basic life sciences" and "to establish partnerships between those who support research in the life sciences and a... | https://en.wikipedia.org/wiki/Life_Sciences_Research_Foundation |
Life Sciences Switzerland ( LS2 ) is the Swiss federation of scientific societies for life sciences . It was formerly known as the Union of the Swiss Societies for Experimental Biology (USGEB). [ 1 ] [ 2 ] It was founded in 1969, with the founding meeting taking place in Bern, Switzerland. [ 3 ] At the founding, four s... | https://en.wikipedia.org/wiki/Life_Sciences_Switzerland |
Life That Glows (also known as David Attenborough's Light on Earth ) is a 2016 British nature documentary programme made for BBC Television , first shown in the UK on BBC Two on 9 May 2016. The programme is presented and narrated by Sir David Attenborough .
Life That Glows depicts the biology and ecology of biolumines... | https://en.wikipedia.org/wiki/Life_That_Glows |
Human life expectancy is a statistical measure of the estimate of the average remaining years of life at a given age. The most commonly used measure is life expectancy at birth (LEB, or in demographic notation e 0 , where e x denotes the average life remaining at age x ). This can be defined in two ways. Cohort LEB is ... | https://en.wikipedia.org/wiki/Life_expectancy |
Chemical
Neurological
Life extension is the concept of extending the human lifespan , either modestly through improvements in medicine or dramatically by increasing the maximum lifespan beyond its generally-settled biological limit of around 125 years . [ 1 ] Several researchers in the area, along with "life extensio... | https://en.wikipedia.org/wiki/Life_extension |
Life on Earth: A Natural History by David Attenborough is a British television natural history series made by the BBC in association with Warner Bros. Television and Reiner Moritz Productions . It was transmitted in the UK from 16 January 1979.
During the course of the series presenter David Attenborough , following t... | https://en.wikipedia.org/wiki/Life_on_Earth_(TV_series) |
The possibility of life on Mars is a subject of interest in astrobiology due to the planet 's proximity and similarities to Earth . To date, no conclusive evidence of past or present life has been found on Mars. Cumulative evidence suggests that during the ancient Noachian time period, the surface environment of Mars h... | https://en.wikipedia.org/wiki/Life_on_Mars |
Whether there is life on Titan , the largest moon of Saturn , is currently an open question and a topic of scientific assessment and research. Titan is far colder than Earth , but of all the places in the Solar System , Titan is the only place besides Earth known to have liquids in the form of rivers, lakes, and seas o... | https://en.wikipedia.org/wiki/Life_on_Titan |
The possibility of life on Venus is a subject of interest in astrobiology due to Venus 's proximity and similarities to Earth . To date, no definitive evidence has been found of past or present life there. In the early 1960s, studies conducted via spacecraft demonstrated that the current Venusian environment is extreme... | https://en.wikipedia.org/wiki/Life_on_Venus |
Verily Life Sciences LLC , [ 2 ] also known as Verily (formerly Google Life Sciences ), is Alphabet Inc. 's research organization devoted to the study of life sciences . [ 3 ] [ 4 ] The organization was formerly a division of Google X , until August 10, 2015, when Sergey Brin announced that the organization would becom... | https://en.wikipedia.org/wiki/Life_sciences_division_of_Google_X |
The Lifecycle Modeling Language (LML) is an open-standard modeling language designed for systems engineering . It supports the full lifecycle : conceptual, utilization, support and retirement stages. Along with the integration of all lifecycle disciplines including, program management , systems and design engineering ,... | https://en.wikipedia.org/wiki/Lifecycle_Modeling_Language |
Lifileucel , sold under the brand name Amtagvi , is an adoptive T cell therapy used for the treatment of melanoma . [ 1 ] [ 2 ] [ 3 ]
Specifically, lifileucel is a tumor-derived T cell immunotherapy composed of a recipient's own T cells. A portion of the recipient's tumor tissue is removed during a surgical procedure ... | https://en.wikipedia.org/wiki/Lifileucel |
In condensed matter physics and physical chemistry , the Lifshitz theory of van der Waals forces , sometimes called the macroscopic theory of van der Waals forces , is a method proposed by Evgeny Mikhailovich Lifshitz in 1954 for treating van der Waals forces between bodies which does not assume pairwise additivity of ... | https://en.wikipedia.org/wiki/Lifshitz_theory_of_van_der_Waals_force |
In polymer science , the Lifson–Roig model [ 1 ] is a helix-coil transition model applied to the alpha helix - random coil transition of polypeptides ; [ 2 ] it is a refinement of the Zimm–Bragg model that recognizes that a polypeptide alpha helix is only stabilized by a hydrogen bond only once three consecutive residu... | https://en.wikipedia.org/wiki/Lifson–Roig_model |
The lift-off process in microstructuring technology is a method of creating structures (patterning) of a target material on the surface of a substrate (e.g. wafer ) using a sacrificial material (e.g. photoresist ).
It is an additive technique as opposed to more traditional subtracting technique like etching .
The scale... | https://en.wikipedia.org/wiki/Lift-off_(microtechnology) |
In aerodynamics , the lift-to-drag ratio (or L/D ratio ) is the lift generated by an aerodynamic body such as an aerofoil or aircraft, divided by the aerodynamic drag caused by moving through air. It describes the aerodynamic efficiency under given flight conditions. The L/D ratio for any given body will vary according... | https://en.wikipedia.org/wiki/Lift-to-drag_ratio |
When a fluid flows around an object, the fluid exerts a force on the object. Lift is the component of this force that is perpendicular to the oncoming flow direction. [ 1 ] It contrasts with the drag force, which is the component of the force parallel to the flow direction. Lift conventionally acts in an upward directi... | https://en.wikipedia.org/wiki/Lift_(force) |
Lift Powder , or Lift Charge is a slang term for Gunpowder . The term "Lift Powder" is mostly used in the Fireworks Industry. [ 1 ] [ 2 ]
This pyrotechnics -related article is a stub . You can help Wikipedia by expanding it . | https://en.wikipedia.org/wiki/Lift_powder |
Lift slab construction (also called the Youtz-Slick Method) is a method of constructing concrete buildings by casting the floor or roof slab on top of the previous slab and then raising (jacking) the slab up with hydraulic jacks . This method of construction allows for a large portion of the work to be completed at gro... | https://en.wikipedia.org/wiki/Lift_slab_construction |
The Lifting Operations and Lifting Equipment Regulations 1998 (LOLER) are set of regulations created under the Health and Safety at Work etc. Act 1974 which came into force in Great Britain on 5 December 1998 [ 1 ] and replaced a number of other pieces of legislation which previously covered the use of lifting equipmen... | https://en.wikipedia.org/wiki/Lifting_Operations_and_Lifting_Equipment_Regulations_1998 |
Lifting bosses or handling bosses are protrusions intentionally left on stones by masons to facilitate maneuvering the blocks with ropes and levers. [ 1 ] [ 2 ]
They are an important feature of ancient and classical construction, and were often not cut away, despite having fulfilled their purpose. Sometimes this was t... | https://en.wikipedia.org/wiki/Lifting_boss |
Lifting equipment , also known as lifting gear , is a general term for any equipment that can be used to lift and lower loads. [ 1 ] Types of lifting equipment include heavy machinery such as the patient lift , overhead cranes , forklifts , jacks , building cradles, and passenger lifts, and can also include smaller acc... | https://en.wikipedia.org/wiki/Lifting_equipment |
Ligado Networks , formerly known as LightSquared, is an American satellite communications company.
After restructuring, emerging from bankruptcy and modifying its network plan, the new company, Ligado Networks, launched in 2016. It operates the SkyTerra 1 satellite. [ 3 ]
Ligado Networks is based in Reston, Virginia ... | https://en.wikipedia.org/wiki/Ligado_Networks |
In coordination chemistry , a ligand [ a ] is an ion or molecule with a functional group that binds to a central metal atom to form a coordination complex . The bonding with the metal generally involves formal donation of one or more of the ligand's electron pairs , often through Lewis bases . [ 1 ] The nature of metal... | https://en.wikipedia.org/wiki/Ligand |
Ligand-gated ion channels ( LICs , LGIC ), also commonly referred to as ionotropic receptors , are a group of transmembrane ion-channel proteins which open to allow ions such as Na + , K + , Ca 2+ , and/or Cl − to pass through the membrane in response to the binding of a chemical messenger (i.e. a ligand ), such as a n... | https://en.wikipedia.org/wiki/Ligand-gated_ion_channel |
A ligand-targeted liposome (LTL) is a nanocarrier with specific ligands attached to its surface to enhance localization for targeted drug delivery . The targeting ability of LTLs enhances cellular localization and uptake of these liposomes for therapeutic or diagnostic purposes. LTLs have the potential to enhance drug ... | https://en.wikipedia.org/wiki/Ligand-targeted_liposome |
LigandScout is computer software that allows creating three-dimensional (3D) pharmacophore models from structural data of macromolecule – ligand complexes, or from training and test sets of organic molecules. It incorporates a complete definition of 3D chemical features (such as hydrogen bond donors, acceptors, lipophi... | https://en.wikipedia.org/wiki/LigandScout |
In biochemistry and pharmacology , a ligand is a substance that forms a complex with a biomolecule to serve a biological purpose. The etymology stems from Latin ligare , which means 'to bind'. In protein-ligand binding, the ligand is usually a molecule which produces a signal by binding to a site on a target protein . ... | https://en.wikipedia.org/wiki/Ligand_(biochemistry) |
A ligand binding assay ( LBA ) is an assay , or an analytic procedure, which relies on the binding of ligand molecules to receptors , antibodies or other macromolecules . [ 1 ] A detection method is used to determine the presence and amount of the ligand-receptor complexes formed, and this is usually determined electro... | https://en.wikipedia.org/wiki/Ligand_binding_assay |
Ligand bond number (LBN) represents the effective total number of ligands or ligand attachment points surrounding a metal center, labeled M. [ 1 ] [ 2 ] More simply, it represents the number of coordination sites occupied on the metal. Based on the covalent bond classification method (from where LBN is derived), the ... | https://en.wikipedia.org/wiki/Ligand_bond_number |
In coordination chemistry , the ligand cone angle (θ) is a measure of the steric bulk of a ligand in a transition metal coordination complex . It is defined as the solid angle formed with the metal at the vertex of a cone and the outermost edge of the van der Waals spheres of the ligand atoms at the perimeter of the ba... | https://en.wikipedia.org/wiki/Ligand_cone_angle |
There are two types of pathway for substitution of ligands in a complex. The ligand dependent pathway is the one whereby the chemical properties of the ligand affect the rate of substitution. Alternatively, there is the ligand independent pathway , which is where the ligand does not have an effect.
This is of vital i... | https://en.wikipedia.org/wiki/Ligand_dependent_pathway |
Ligand efficiency is a measurement of the binding energy per atom of a ligand to its binding partner, such as a receptor or enzyme. [ 1 ]
Ligand efficiency is used in drug discovery research programs to assist in narrowing focus to lead compounds with optimal combinations of physicochemical properties and pharmacologi... | https://en.wikipedia.org/wiki/Ligand_efficiency |
Ligand field theory ( LFT ) describes the bonding, orbital arrangement, and other characteristics of coordination complexes . [ 1 ] [ 2 ] [ 3 ] [ 4 ] It represents an application of molecular orbital theory to transition metal complexes. A transition metal ion has nine valence atomic orbitals - consisting of five n d, ... | https://en.wikipedia.org/wiki/Ligand_field_theory |
In coordination chemistry , ligand isomerism is a type of structural isomerism in coordination complexes which arises from the presence of ligands which can adopt different isomeric forms. 1,2-Diaminopropane and 1,3-Diaminopropane are the examples that each feature a different isomer would be ligand isomers. [ 1 ] [ 2 ... | https://en.wikipedia.org/wiki/Ligand_isomerism |
The ligase chain reaction ( LCR ) is a method of DNA amplification. The ligase chain reaction (LCR) is an amplification process that differs from polymerase chain reaction (PCR) in that it involves a thermostable ligase to join two probes or other molecules together which can then be amplified by standard PCR cycling. ... | https://en.wikipedia.org/wiki/Ligase_chain_reaction |
Ligation-independent cloning (LIC) is a form of molecular cloning that can be performed without the use of restriction endonucleases or DNA ligase . The technique was developed in the early 1990s as an alternative to restriction enzyme/ligase cloning. [ 1 ] This allows genes to be cloned without the requirement of a re... | https://en.wikipedia.org/wiki/Ligation-independent_cloning |
Ligation is the joining of two nucleotides, or two nucleic acid fragments, into a single polymeric chain through the action of an enzyme known as a ligase . The reaction involves the formation of a phosphodiester bond between the 3'-hydroxyl terminus of one nucleotide and the 5'-phosphoryl terminus of another nucleotid... | https://en.wikipedia.org/wiki/Ligation_(molecular_biology) |
In mathematics , Light's associativity test is a procedure invented by F. W. Light for testing whether a binary operation defined in a finite set by a Cayley multiplication table is associative . The naive procedure for verification of the associativity of a binary operation specified by a Cayley table, which compares ... | https://en.wikipedia.org/wiki/Light's_associativity_test |
Light-Water: a Mosaic of Meditations is a " hypermedia work" [ 1 ] that utilizes and layers images and poetry to "create a striking experience of poetic meditation." [ 2 ] Created by Christy Sheffield Sanford in 1999, [ 3 ] [ 4 ] the work consists of ten poems that produce a "visual-literal meditation on light and wate... | https://en.wikipedia.org/wiki/Light-Water:_a_Mosaic_of_Meditations |
In physics , particularly special relativity , light-cone coordinates , introduced by Paul Dirac [ 1 ] and also known as Dirac coordinates, are a special coordinate system where two coordinate axes combine both space and time, while all the others are spatial.
A spacetime plane may be associated with the plane of spl... | https://en.wikipedia.org/wiki/Light-cone_coordinates |
Light-dependent reactions are certain photochemical reactions involved in photosynthesis , the main process by which plants acquire energy. There are two light dependent reactions: the first occurs at photosystem II (PSII) and the second occurs at photosystem I (PSI) .
PSII absorbs a photon to produce a so-called high... | https://en.wikipedia.org/wiki/Light-dependent_reactions |
A light-emitting electrochemical cell ( LEC or LEEC ) is a solid-state device that generates light from an electric current ( electroluminescence ). LECs are usually composed of two metal electrodes connected by (e.g. sandwiching) an organic semiconductor containing mobile ions. Aside from the mobile ions, their stru... | https://en.wikipedia.org/wiki/Light-emitting_electrochemical_cell |
In biology , a light-harvesting complex or LHC is an aggregate consisting of proteins bound with chromophores ( chlorophylls and carotenoids ) that play a key role in photosynthesis . LHCs are arrayed around photosynthetic reaction centers in both plants and photosynthetic bacteria and collect more of the incoming ligh... | https://en.wikipedia.org/wiki/Light-harvesting_complex |
The light-harvesting complex (or antenna complex ; LH or LHC ) is an array of protein and chlorophyll molecules embedded in the thylakoid membrane of plants and cyanobacteria, which transfer light energy to one chlorophyll a molecule at the reaction center of a photosystem .
The antenna pigments are predominantly chlo... | https://en.wikipedia.org/wiki/Light-harvesting_complexes_of_green_plants |
A light-induced fluorescence transient ( LIFT ) is a device to remotely measure chlorophyll fluorescence in plants in a fast and non-destructive way. By using a series of excitation light pulses, LIFT combines chlorophyll fluorescence data with spectral and RGB information to provide insights into various photosyntheti... | https://en.wikipedia.org/wiki/Light-induced_fluorescence_transient |
A Light-oxygen-voltage-sensing domain ( LOV domain ) is a protein sensor used by a large variety of higher plants, microalgae, fungi and bacteria to sense environmental conditions. In higher plants, they are used to control phototropism , chloroplast relocation, and stomatal opening, whereas in fungal organisms, they a... | https://en.wikipedia.org/wiki/Light-oxygen-voltage-sensing_domain |
The light-second is a unit of length useful in astronomy , telecommunications and relativistic physics . It is defined as the distance that light travels in free space in one second , and is equal to exactly 299 792 458 m (approximately 983 571 055 ft or 186 282 miles ).
Just as the second forms the basis for other un... | https://en.wikipedia.org/wiki/Light-second |
A Light Aid Detachment is an attached independent minor unit of the Royal Electrical and Mechanical Engineers , Royal Canadian Electrical and Mechanical Engineers , Royal Australian Electrical and Mechanical Engineers , or Royal New Zealand Army Logistic Regiment operating as a sub-unit of the supported unit. These uni... | https://en.wikipedia.org/wiki/Light_Aid_Detachment |
Light scattering spectroscopy (LSS) is a spectroscopic technique typically used to evaluate morphological changes in epithelial cells in order to study mucosal tissue and detect early cancer and precancer . [ 1 ] [ 2 ] [ 3 ]
Light scattering spectroscopy relies upon elastic scattering of photons reflected from the epi... | https://en.wikipedia.org/wiki/Light_Scattering_Spectroscopy |
An aluminium alloy ( UK / IUPAC ) or aluminum alloy ( NA ; see spelling differences ) is an alloy in which aluminium (Al) is the predominant metal. The typical alloying elements are copper , magnesium , manganese , silicon , tin , nickel and zinc . There are two principal classifications, namely casting alloys and wrou... | https://en.wikipedia.org/wiki/Light_alloy |
A light booth is an apparatus which simulates lighting conditions. This apparatus is used to test products under a variety of lighting conditions, meaning that the user can accurately show how that product will appear under a variety of conditions independent of environmental influences. [ 1 ] Light booths are primaril... | https://en.wikipedia.org/wiki/Light_booth |
In special and general relativity , a light cone (or "null cone") is the path that a flash of light, emanating from a single event (localized to a single point in space and a single moment in time) and traveling in all directions, would take through spacetime .
If one imagines the light confined to a two-dimensional p... | https://en.wikipedia.org/wiki/Light_cone |
In theoretical physics , light cone gauge is an approach to remove the ambiguities arising from a gauge symmetry . While the term refers to several situations, a null component of a field A is set to zero (or a simple function of other variables) in all cases. [ 1 ] [ 2 ]
The advantage of light-cone gauge is that fiel... | https://en.wikipedia.org/wiki/Light_cone_gauge |
Light crude oil is liquid petroleum that has a low density and flows freely at room temperature . [ 1 ] It has a low viscosity , low specific gravity and high API gravity due to the presence of a high proportion of light hydrocarbon fractions . [ 2 ] It generally has a low wax content. Light crude oil receives a higher... | https://en.wikipedia.org/wiki/Light_crude_oil |
In botany , a light curve shows the photosynthetic response of leaf tissue or algal communities to varying light intensities. The shape of the curve illustrates the principle of limiting factors ; in low light levels, the rate of photosynthesis is limited by the concentration of chlorophyll and the efficiency of the li... | https://en.wikipedia.org/wiki/Light_curve_(botany) |
A light echo is a physical phenomenon caused by light reflected off surfaces distant from the source, and arriving at the observer with a delay relative to this distance. The phenomenon is analogous to an echo of sound , but due to the much faster speed of light , it mostly manifests itself only over astronomical dista... | https://en.wikipedia.org/wiki/Light_echo |
Light field microscopy ( LFM ) is a scanning-free 3-dimensional (3D) microscopic imaging method based on the theory of light field . This technique allows sub-second (~10 Hz) large volumetric imaging ([~0.1 to 1 mm] 3 ) with ~1 μm spatial resolution in the condition of weak scattering and semi-transparence, which has n... | https://en.wikipedia.org/wiki/Light_field_microscopy |
A light fixture (US English), light fitting (UK English), or luminaire is an electrical lighting device containing one or more light sources, such as lamps , and all the accessory components required for its operation to provide illumination to the environment. [ 1 ] All light fixtures have a fixture body and one or mo... | https://en.wikipedia.org/wiki/Light_fixture |
The light-front quantization [ 1 ] [ 2 ] [ 3 ] of quantum field theories provides a useful alternative to ordinary equal-time quantization . In
particular, it can lead to a relativistic description of bound systems in terms of quantum-mechanical wave functions . The quantization is
based on the choice of light-front ... | https://en.wikipedia.org/wiki/Light_front_quantization |
A light metal is any metal of relatively low density. [ 1 ] These may be pure elements, but more commonly are metallic alloys . Lithium and then potassium are the two lightest metallic elements.
Magnesium , aluminium and titanium alloys are light metals of significant commercial importance. [ 2 ] Their densities of 1.... | https://en.wikipedia.org/wiki/Light_metal |
A light non-aqueous phase liquid (LNAPL) is a groundwater contaminant that is not soluble in water and has a lower density than water , in contrast to a DNAPL which has a higher density than water. Once a LNAPL pollution infiltrates the ground , it will stop at the depth of the water table because of its positive buoya... | https://en.wikipedia.org/wiki/Light_non-aqueous_phase_liquid |
Light Scanning Photomacrography (LSP), also known as Scanning Light Photomacrography (SLP) or Deep-Field Photomacrography , is a photographic film technique that allows for high magnification light imaging with exceptional depth of field (DOF). This method overcomes the limitations of conventional macro photography , w... | https://en.wikipedia.org/wiki/Light_scanning_photomacrography |
Light sheet fluorescence microscopy ( LSFM ) is a fluorescence microscopy technique with an intermediate-to-high [ 1 ] optical resolution , but good optical sectioning capabilities and high speed. In contrast to epifluorescence microscopy only a thin slice (usually a few hundred nanometers to a few micrometers) of the ... | https://en.wikipedia.org/wiki/Light_sheet_fluorescence_microscopy |
The light travel time effect is defined as the differences that occur in the periodic eclipses of binary stars when they are disturbed by another massive object.
The periods of the orbits in an undisturbed eclipsing binary star system stay relatively stable, since the center of mass does not change in position. A more... | https://en.wikipedia.org/wiki/Light_travel_time_effect |
Lightening holes are holes in structural components of machines and buildings used by a variety of engineering disciplines to make structures lighter. The edges of the hole may be flanged to increase the rigidity and strength of the component. [ 1 ] The holes can be circular, triangular, elliptical, or rectangular and ... | https://en.wikipedia.org/wiki/Lightening_holes |
Lightfastness is a property of a colourant such as dye or pigment that describes its resistance to fading when exposed to light. [ 1 ] [ 2 ] [ 3 ] Dyes and pigments are used for example for dyeing of fabrics , plastics or other materials and manufacturing paints or printing inks .
The bleaching of the color is caused ... | https://en.wikipedia.org/wiki/Lightfastness |
In aeroacoustics , Lighthill's eighth power law states that power of the sound created by a turbulent motion, far from the turbulence, is proportional to eighth power of the characteristic turbulent velocity, derived by Sir James Lighthill in 1952. [ 1 ] [ 2 ] This is used to calculate the total acoustic power of the j... | https://en.wikipedia.org/wiki/Lighthill's_eighth_power_law |
A lighting control system is intelligent network-based lighting control that incorporates communication between various system inputs and outputs related to lighting control with the use of one or more central computing devices. Lighting control systems are widely used on both indoor and outdoor lighting of commercia... | https://en.wikipedia.org/wiki/Lighting_control_system |
Lighting ratio in photography refers to the comparison of key light (the main source of light from which shadows fall) to the total fill light (the light that fills in the shadow areas). [ 1 ] The higher the lighting ratio, the higher the contrast of the image; the lower the ratio, the lower the contrast. The lighting ... | https://en.wikipedia.org/wiki/Lighting_ratio |
Nir Pochter (CMO/Co Founder)
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Lightricks , founded in January 2013, is a company that develops video and image editing mobile apps and software, known particularly for its selfie-editing app, Facetune . [ 1 ] [ 2 ] [ 3 ] Headquartered in Jerusalem, the firm has approximately 600 employees.... | https://en.wikipedia.org/wiki/Lightricks |
Lightweight Extensible Authentication Protocol ( LEAP ) is a proprietary wireless LAN authentication method developed by Cisco Systems . Important features of LEAP are dynamic WEP keys and mutual authentication (between a wireless client and a RADIUS server). LEAP allows for clients to re-authenticate frequently; upo... | https://en.wikipedia.org/wiki/Lightweight_Extensible_Authentication_Protocol |
A lightweight markup language ( LML ), also termed a simple or humane markup language , is a markup language with simple, unobtrusive syntax. It is designed to be easy to write using any generic text editor and easy to read in its raw form. Lightweight markup languages are used in applications where it may be necessar... | https://en.wikipedia.org/wiki/Lightweight_markup_language |
In computing , lightweight software [ 1 ] also called lightweight program and lightweight application , is a computer program that is designed to have a small memory footprint (RAM usage) and low CPU usage , overall a low usage of system resources [ citation needed ] . To achieve this, the software should avoid softwar... | https://en.wikipedia.org/wiki/Lightweight_software |
Lightweighting is a concept in the auto industry about building cars and trucks that are less heavy as a way to achieve better fuel efficiency , battery range , acceleration, braking and handling. [ 1 ] [ 2 ] In addition, lighter vehicles can tow and haul larger loads because the engine is not carrying unnecessary weig... | https://en.wikipedia.org/wiki/Lightweighting |
Lightwood's law is the principle that, in medicine , bacterial infections will tend to localise while viral infections will tend to spread. [ 1 ] This is based on the observation that while bacterial sepsis tends, despite affecting the whole body, to have a clear site of origin or 'focus', the opposite may be true of v... | https://en.wikipedia.org/wiki/Lightwood's_law |
A lignocolous lichen is a lichen that grows on wood that has the bark stripped from it. [ 1 ] This contrasts with a corticolous lichen that grows on the bark, [ 2 ] and saxicolous lichens that grow on rock. [ 3 ]
This article about lichens or lichenology is a stub . You can help Wikipedia by expanding it . | https://en.wikipedia.org/wiki/Lignicolous_lichen |
Lignin is a class of complex organic polymers that form key structural materials in the support tissues of most plants. [ 1 ] Lignins are particularly important in the formation of cell walls , especially in wood and bark , because they lend rigidity and do not rot easily. Chemically, lignins are polymers made by cross... | https://en.wikipedia.org/wiki/Lignin |
The term " lignin characterization " (or " lignin analysis ") refers to a group of activities within lignin research aiming at describing the characteristics of a lignin by determination of its most important properties. [ 1 ] Most often, this term is used to describe the characterization of technical lignins by means ... | https://en.wikipedia.org/wiki/Lignin_characterization |
LignoSat is a small Japanese wooden satellite . It is credited as the world's first satellite to be made of wood. [ 1 ] [ 2 ] [ 3 ] [ 4 ]
LignoSat was developed by Kyoto University and logging firm Sumitomo Forestry as a demonstration of using wood for space exploration uses. [ 4 ]
The satellite is named after the La... | https://en.wikipedia.org/wiki/LignoSat |
Ligroin is the petroleum fraction consisting mostly of C 7 and C 8 hydrocarbons and boiling in the range 90‒140 °C (194–284 °F). The fraction is also called heavy naphtha . [ 1 ] [ 2 ] Ligroin is used as a laboratory solvent . Products under the name ligroin can have boiling ranges as low as 60‒80 °C and may be called... | https://en.wikipedia.org/wiki/Ligroin |
A like button , like option , or recommend button is a feature in communication software such as social networking services , Internet forums , news websites and blogs where the user can express that they like or support certain content . [ 1 ] Internet services that feature like buttons usually display the number of u... | https://en.wikipedia.org/wiki/Like_button |
In mathematics , like terms are summands in a sum that differ only by a numerical factor. [ 1 ] Like terms can be regrouped by adding their coefficients.
Typically, in a polynomial expression , like terms are those that contain the same variables to the same powers , possibly with different coefficients .
More genera... | https://en.wikipedia.org/wiki/Like_terms |
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