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The stable isotope composition of amino acids refers to the abundance of heavy and light non-radioactive isotopes of carbon ( 13 C and 12 C), nitrogen ( 15 N and 14 N), and other elements within these molecules. Amino acids are the building blocks of proteins. They are synthesized from alpha-keto acid precursors that a... | https://en.wikipedia.org/wiki/Stable_isotope_composition_of_amino_acids |
Stable isotope labeling by/with amino acids in cell culture ( SILAC ) is a technique based on mass spectrometry that detects differences in protein abundance among samples using non-radioactive isotopic labeling . [ 1 ] [ 2 ] [ 3 ] [ 4 ] It is a popular method for quantitative proteomics .
Two populations of cells are... | https://en.wikipedia.org/wiki/Stable_isotope_labeling_by_amino_acids_in_cell_culture |
The term stable isotope has a meaning similar to stable nuclide , but is preferably used when speaking of nuclides of a specific element. Hence, the plural form stable isotopes usually refers to isotopes of the same element. The relative abundance of such stable isotopes can be measured experimentally ( isotope analysi... | https://en.wikipedia.org/wiki/Stable_isotope_ratio |
In mathematics , and in particular the study of dynamical systems , the idea of stable and unstable sets or stable and unstable manifolds give a formal mathematical definition to the general notions embodied in the idea of an attractor or repellor . In the case of hyperbolic dynamics , the corresponding notion is that ... | https://en.wikipedia.org/wiki/Stable_manifold |
In mathematics , especially in the study of dynamical systems and differential equations , the stable manifold theorem is an important result about the structure of the set of orbits approaching a given hyperbolic fixed point . It roughly states that the existence of a local diffeomorphism near a fixed point implies th... | https://en.wikipedia.org/wiki/Stable_manifold_theorem |
Stable massive particles (SMPs) are hypothetical particles that are long-lived and have appreciable mass. The precise definition varies depending on the different experimental or observational searches. SMPs may be defined as being at least as massive as electrons , and not decaying during its passage through a detecto... | https://en.wikipedia.org/wiki/Stable_massive_particles |
In mathematics , economics , and computer science , the stable matching problem [ 1 ] [ 2 ] [ 3 ] is the problem of finding a stable matching between two equally sized sets of elements given an ordering of preferences for each element. A matching is a bijection from the elements of one set to the elements of the other... | https://en.wikipedia.org/wiki/Stable_matching_problem |
Stable nucleic acid lipid particles ( SNALPs ) are microscopic particles approximately 120 nanometers in diameter, smaller than the wavelengths of visible light. They have been used to deliver siRNAs therapeutically to mammals in vivo . In SNALPs, the siRNA is surrounded by a lipid bilayer containing a mixture of catio... | https://en.wikipedia.org/wiki/Stable_nucleic_acid_lipid_particle |
Stable nuclides are isotopes of a chemical element whose nucleons are in a configuration that does not permit them the surplus energy required to produce a radioactive emission. The nuclei of such isotopes are not radioactive and unlike radionuclides do not spontaneously undergo radioactive decay . [ 1 ] When these nuc... | https://en.wikipedia.org/wiki/Stable_nuclide |
The stable ocean hypothesis ( SOH ) is one of several hypotheses within larval fish ecology that attempt to explain recruitment variability (Figure 1; [ 1 ] Table 1). The SOH is the notion that favorable and somewhat stable physical and biological ocean conditions, such as the flow of currents and food availability, ar... | https://en.wikipedia.org/wiki/Stable_ocean_hypothesis |
Stable and persistent phosphorus radicals are phosphorus-centred radicals that are isolable and can exist for at least short periods of time. [ 1 ] Radicals consisting of main group elements are often very reactive and undergo uncontrollable reactions, notably dimerization and polymerization . [ 2 ] The common strategi... | https://en.wikipedia.org/wiki/Stable_phosphorus_radicals |
In the context of the characteristic polynomial of a differential equation or difference equation , a polynomial is said to be stable if either:
The first condition provides stability for continuous-time linear systems, and the second case relates to stability
of discrete-time linear systems. A polynomial with the fi... | https://en.wikipedia.org/wiki/Stable_polynomial |
In mathematics , economics and computer science , particularly in the fields of combinatorics , game theory and algorithms , the stable-roommate problem ( SRP ) is the problem of finding a stable matching for an even-sized set. A matching is a separation of the set into disjoint pairs ("roommates"). The matching is sta... | https://en.wikipedia.org/wiki/Stable_roommates_problem |
In the mathematical field of model theory , a theory is called stable if it satisfies certain combinatorial restrictions on its complexity. Stable theories are rooted in the proof of Morley's categoricity theorem and were extensively studied as part of Saharon Shelah 's classification theory , which showed a dichotomy ... | https://en.wikipedia.org/wiki/Stable_theory |
Stack Exchange is a network of question-and-answer (Q&A) websites on topics in diverse fields, each site covering a specific topic, where questions, answers, and users are subject to a reputation award process. The reputation system allows the sites to be self-moderating. [ 5 ] Currently, [update] Stack Exchange is com... | https://en.wikipedia.org/wiki/Stack_Exchange |
Stack Overflow is a question-and-answer website for computer programmers . It is the flagship site of the Stack Exchange Network . [ 2 ] [ 3 ] [ 4 ] It was created in 2008 by Jeff Atwood and Joel Spolsky . [ 5 ] [ 6 ] It features questions and answers on certain computer programming topics. [ 7 ] [ 8 ] [ 9 ] It was cre... | https://en.wikipedia.org/wiki/Stack_Overflow |
The stack effect or chimney effect is the movement of air into and out of buildings through unsealed openings, chimneys , flue-gas stacks , or other purposefully designed openings or containers, resulting from air buoyancy . Buoyancy occurs due to a difference in indoor-to-outdoor air density resulting from temperature... | https://en.wikipedia.org/wiki/Stack_effect |
The Stack Resource Policy (SRP) is a resource allocation policy used in real-time computing , used for accessing shared resources when using earliest deadline first scheduling . It was defined by T. P. Baker. [ 1 ] SRP is not the same as the Priority ceiling protocol which is for fixed priority tasks (FP).
Each task ... | https://en.wikipedia.org/wiki/Stack_resource_policy |
Stack search (also known as Stack decoding algorithm ) is a search algorithm similar to beam search . It can be used to explore tree-structured search spaces and is often employed in Natural language processing applications, such as parsing of natural languages, or for decoding of error correcting codes where the techn... | https://en.wikipedia.org/wiki/Stack_search |
The Stackelberg leadership model is a strategic game in economics in which the leader firm moves first and then the follower firms move sequentially (hence, it is sometimes described as the "leader-follower game"). It is named after the German economist Heinrich Freiherr von Stackelberg who published Marktform und Glei... | https://en.wikipedia.org/wiki/Stackelberg_competition |
A stacker is a large machine used in bulk material handling . Its function is to pile bulk material such as limestone, ores, coal and cereals onto a stockpile . A reclaimer can be used to recover the material.
Gold dredges in Alaska had a stacker that was a fixed part of the dredge. It carried over-size material to t... | https://en.wikipedia.org/wiki/Stacker |
The stacking-fault energy (SFE) is a materials property on a very small scale. It is noted as γ SFE in units of energy per area.
A stacking fault is an interruption of the normal stacking sequence of atomic planes in a close-packed crystal structure . These interruptions carry a certain stacking-fault energy. The widt... | https://en.wikipedia.org/wiki/Stacking-fault_energy |
In chemistry , stacking refers to superposition of molecules or atomic sheets owing to attractive interactions between these molecules or sheets.
Metal dichalcogenides have the formula ME 2 , where M = a transition metal and E = S, Se, Te. [ 1 ] In terms of their electronic structures, these compounds are usually view... | https://en.wikipedia.org/wiki/Stacking_(chemistry) |
In crystallography , a stacking fault is a planar defect that can occur in crystalline materials. [ 1 ] [ 2 ] Crystalline materials form repeating patterns of layers of atoms. Errors can occur in the sequence of these layers and are known as stacking faults. Stacking faults are in a higher energy state which is quantif... | https://en.wikipedia.org/wiki/Stacking_fault |
Stacks , formerly Blockstack , is a layer-2 blockchain .
The Blockstack project was originally founded by Muneeb Ali and Ryan Shea in 2013. By 2017, Blockstack locked in two additional funding rounds totalling $4 million. In 2017, Blockstack went on to launch an initial coin offering (ICO) . BlockStack PBC (now called... | https://en.wikipedia.org/wiki/Stacks_blockchain |
Stadia marks , also called stadia lines or stadia hairs , are crosshairs on the reticle of a theodolite or other surveying instrument that allow stadiametric rangefinding .
The term stadia mark derives from the obsolete unit of distance, the stadion , derived from the Greek measurement of a stadium. [ 1 ] Several diff... | https://en.wikipedia.org/wiki/Stadia_mark |
Stadiametric rangefinding , or the stadia method / stadiametry , is a technique of measuring distances with a telescopic instrument . The term stadia comes from a Greek unit of length Stadion (equal to 600 Greek feet, pous ) which was the typical length of a sports stadium of the time. Stadiametric rangefinding is used... | https://en.wikipedia.org/wiki/Stadiametric_rangefinding |
Staff is a kind of artificial stone used for covering and ornamenting temporary buildings.
It is chiefly made of plaster of Paris (powdered gypsum ), with a little cement , glycerin , and dextrin , mixed with water until it is about as thick as molasses . When staff is cast in molds , it can form any shape. To strengt... | https://en.wikipedia.org/wiki/Staff_(building_material) |
In hydrology , stage is the water level in a river or stream with respect to a chosen reference height . [ 1 ] [ 2 ] It is commonly measured in units of feet. Stage is important because direct measurements of river discharge are very difficult while water surface elevation measurements are comparatively easy. In order ... | https://en.wikipedia.org/wiki/Stage_(hydrology) |
In chronostratigraphy , a stage is a succession of rock strata laid down in a single age on the geologic timescale , which usually represents millions of years of deposition. A given stage of rock and the corresponding age of time will by convention have the same name, and the same boundaries.
Rock series are divided... | https://en.wikipedia.org/wiki/Stage_(stratigraphy) |
A stage box is an interface device used in sound reinforcement and recording studios to connect equipment to a mixing console . It provides a central location to connect microphones, instruments, and speakers to a multicore cable (snake), which allows the sound desk to be further from the stage and simplifies setup. [ ... | https://en.wikipedia.org/wiki/Stage_box |
Stage Loading is a measure of the load on a turbomachinery stage, be it a part of a compressor , fan or turbine .
The parameter, which is non-dimensional, is defined as:
L = g J Δ H U 2 {\displaystyle L={\frac {gJ{\Delta }H}{U^{2}}}}
where: Imperial Units (SI Units)
g {\displaystyle g} acceleration of gravity ... | https://en.wikipedia.org/wiki/Stage_loading |
A stage monitor system is a set of performer-facing loudspeakers called monitor speakers , stage monitors , floor monitors , wedges , or foldbacks on stage during live music performances in which a sound reinforcement system is used to amplify a performance for the audience. The monitor system allows musicians to hear ... | https://en.wikipedia.org/wiki/Stage_monitor_system |
Stage wash in professional audio is unwanted sound entering a microphone on stage during a concert. Stage wash can come from the main public address system, from monitor loudspeakers , from instrument amplifiers such as for guitars and keyboards, and from loud instruments such as drums. The effects of stage wash in an ... | https://en.wikipedia.org/wiki/Stage_wash |
Staged combustion is a method used to reduce the emission of nitrogen oxides ( NO x ) during combustion . There are two methods for staged combustion: air staged supply and fuel staged supply. Applications of staged combustion include boilers [ 1 ] and rocket engines . [ 2 ]
Air staging, or two-stage combustion, is ge... | https://en.wikipedia.org/wiki/Staged_combustion |
The staged combustion cycle (sometimes known as topping cycle , preburner cycle , or closed cycle ) is a power cycle of a bipropellant rocket engine . In the staged combustion cycle, propellant flows through multiple combustion chambers , and is thus combusted in stages. The main advantage relative to other rocket engi... | https://en.wikipedia.org/wiki/Staged_combustion_cycle |
The staged event-driven architecture ( SEDA ) refers to an approach to software architecture that decomposes a complex, event-driven application into a set of stages connected by queues. [ 1 ] It avoids the high overhead associated with thread -based concurrency models (i.e. locking, unlocking, and polling for locks), ... | https://en.wikipedia.org/wiki/Staged_event-driven_architecture |
Staged reforming is a thermochemical process to convert organic material or bio waste such as wood, dung or hay into combustible gases containing methane , carbon monoxide and hydrogen . [ 1 ] The single-stage reforming of bio materials results in high dust and tar yields in the produced gas restricting its use, hence ... | https://en.wikipedia.org/wiki/Staged_reforming |
Stagefright is the name given to a group of software bugs that affect versions from 2.2 "Froyo" up until 5.1.1 "Lollipop" [ 1 ] of the Android operating system exposing an estimated 950 million devices (95% of all Android devices) at the time. [ 1 ] The name is taken from the affected library, which among other things,... | https://en.wikipedia.org/wiki/Stagefright_(bug) |
In organic chemistry , a staggered conformation is a chemical conformation of an ethane -like moiety abcX–Ydef in which the substituents a, b, and c are at the maximum distance from d, e, and f; this requires the torsion angles to be 60°. [ 1 ] It is the opposite of an eclipsed conformation , in which those substituent... | https://en.wikipedia.org/wiki/Staggered_conformation |
The staggered extension process (also referred to as StEP) is a common technique used in biotechnology and molecular biology to create new, mutated genes with qualities of one or more initial genes.
The technique itself is a modified polymerase chain reaction with very short (approximately 10 seconds) cycles.
In these... | https://en.wikipedia.org/wiki/Staggered_extension_process |
The staggered truss system is a type of structural steel framing used in high-rise buildings . The system consists of a series of story-high trusses spanning the total width between two rows of exterior columns and arranged in a staggered pattern on adjacent column lines. [ 1 ] William LeMessurier , the founder Cambrid... | https://en.wikipedia.org/wiki/Staggered_truss_system |
In thermodynamics and fluid mechanics , the stagnation enthalpy of a fluid is the static enthalpy of the fluid at a stagnation point . The stagnation enthalpy is also called total enthalpy. At a point where the flow does not stagnate, it corresponds to the static enthalpy of the fluid at that point assuming it was brou... | https://en.wikipedia.org/wiki/Stagnation_enthalpy |
In fluid dynamics , a stagnation point is a point in a flow field where the local velocity of the fluid is zero. [ 1 ] : § 3.2 The Bernoulli equation shows that the static pressure is highest when the velocity is zero and hence static pressure is at its maximum value at stagnation points: in this case static pressure e... | https://en.wikipedia.org/wiki/Stagnation_point |
In fluid dynamics , a stagnation point flow refers to a fluid flow in the neighbourhood of a stagnation point (in two-dimensional flows) or a stagnation line (in three-dimensional flows) with which the stagnation point/line refers to a point/line where the velocity is zero in the inviscid approximation. The flow specif... | https://en.wikipedia.org/wiki/Stagnation_point_flow |
In fluid dynamics , stagnation pressure , also
referred to as total pressure , is what the pressure would be if all the kinetic energy of the fluid were to be converted into pressure in a reversable manner. [ 1 ] : § 3.2 ; it is defined as the sum of the free-stream static pressure and the free-stream dynamic pressure ... | https://en.wikipedia.org/wiki/Stagnation_pressure |
In thermodynamics and fluid mechanics , stagnation temperature is the temperature at a stagnation point in a fluid flow. At a stagnation point, the speed of the fluid is zero and all of the kinetic energy has been converted to internal energy and is added to the local static enthalpy . In both compressible and incompre... | https://en.wikipedia.org/wiki/Stagnation_temperature |
In matrix analysis Stahl's theorem is a theorem proved in 2011 by Herbert Stahl concerning Laplace transforms for special matrix functions. [ 1 ] It originated in 1975 as the Bessis-Moussa-Villani (BMV) conjecture by Daniel Bessis, Pierre Moussa, and Marcel Villani. [ 2 ] In 2004 Elliott H. Lieb and Robert Seiringer ga... | https://en.wikipedia.org/wiki/Stahl's_theorem |
A stain is a discoloration that can be clearly distinguished from the surface, material, or medium it is found upon. They are caused by the chemical or physical interaction of two dissimilar materials. Accidental staining may make materials appear used, degraded or permanently unclean . Intentional staining is used in ... | https://en.wikipedia.org/wiki/Stain |
Staining is a technique used to enhance contrast in samples, generally at the microscopic level. Stains and dyes are frequently used in histology (microscopic study of biological tissues ), in cytology (microscopic study of cells ), and in the medical fields of histopathology , hematology , and cytopathology that focus... | https://en.wikipedia.org/wiki/Staining |
Stains-all is a carbocyanine dye, which stains anionic proteins , nucleic acids , anionic polysaccharides and other anionic molecules. [ 1 ] [ 2 ]
Stains-all is metachromatic and changes its color dependent on its contact to other molecules. [ 3 ] The detection limit for phosphoproteins is below 1 ng after one hour of... | https://en.wikipedia.org/wiki/Stains-all |
Nosing is the horizontal, protruding edge of a stair where most foot traffic frequently occurs.
The horizontal projection to the front of a tread where most foot traffic frequently occurs. The nosing is the protrusion beyond the riser when vertical risers are used, or beyond the back of the tread below, when angled ri... | https://en.wikipedia.org/wiki/Stair_nosing |
A stair tread is the horizontal portion of a set of stairs on which a person walks. The tread can be composed of wood , metal , plastic , or other materials. In residential settings, treads can be covered in carpeting . Stair treads can come in non-slip varieties, particularly in commercial or industrial locations. [ 1... | https://en.wikipedia.org/wiki/Stair_tread |
Staircase voltammetry is a derivative of linear sweep voltammetry . [ 1 ] [ 2 ] In linear sweep voltammetry the current at a working electrode is measured while the potential between the working electrode and a reference electrode is swept linearly in time. Oxidation or reduction of species is registered as a peak or t... | https://en.wikipedia.org/wiki/Staircase_voltammetry |
Stairs are a structure designed to bridge a large vertical distance between lower and higher levels by dividing it into smaller vertical distances. This is achieved as a diagonal series of horizontal platforms called steps which enable passage to the other level by stepping from one to another step in turn. Steps are v... | https://en.wikipedia.org/wiki/Stairs |
Stakalloy is a ternary alloy of uranium composed of vanadium , niobium , and depleted uranium . [ 1 ] The alloy was developed in 2002 by Michael R. Staker of Loyola University Maryland under grant from the United States Army. [ 2 ]
The niobium content of stakalloy is between 0.01 and 0.95 percent by weight and the bal... | https://en.wikipedia.org/wiki/Stakalloy |
[ 1 ] The stalagmometric method ( Ancient Greek : στάλαγμα , romanized : stálagma , lit. 'drop') is one of the most common methods for measuring surface tension . The principle is to measure the weight of drops of a fluid of interest falling from a capillary glass tube , and thereby calculate the surface tension of the... | https://en.wikipedia.org/wiki/Stalagmometric_method |
A stall is the slowing or stopping of a process, and, in the case of an engine , refers to a sudden stopping of the engine turning, [ 1 ] usually brought about accidentally.
It is commonly applied to the phenomenon whereby an engine abruptly ceases operating and stops turning. It might be due to not getting enough air... | https://en.wikipedia.org/wiki/Stall_(engine) |
In fluid dynamics , a stall is a reduction in the lift coefficient generated by a foil as angle of attack exceeds its critical value . [ 1 ] The critical angle of attack is typically about 15°, but it may vary significantly depending on the fluid , foil – including its shape, size, and finish – and Reynolds number .
S... | https://en.wikipedia.org/wiki/Stall_(fluid_dynamics) |
Stall torque is the torque produced by a mechanical device whose output rotational speed is zero. It may also mean the torque load that causes the output rotational speed of a device to become zero, i.e., to cause stalling . Electric motors, steam engines and hydrodynamic transmissions are all capable of developing to... | https://en.wikipedia.org/wiki/Stall_torque |
The Stamford Raffles Award is an award of the Zoological Society of London . It is "For distinguished contributions to zoology by amateur zoologists or professional zoologists in recognition of contributions which are outside the scope of their professional activities." [ 1 ] The first awards were sculptures by Henry M... | https://en.wikipedia.org/wiki/Stamford_Raffles_Award |
A stamp mill (or stamp battery or stamping mill ) is a type of mill machine that crushes material by pounding rather than grinding , either for further processing or for extraction of metallic ores. Breaking material down is a type of unit operation .
A stamp mill consists of a set of heavy steel ( iron -shod wood in ... | https://en.wikipedia.org/wiki/Stamp_mill |
Stamp sand is a coarse sand left over from the processing of ore in a stamp mill . [ 1 ] In the United States, the most well-known deposits of stamp sand are in the Copper Country of the Upper Peninsula of Michigan , where it is black or dark gray, and may contain hazardous concentrations of trace metals.
In the 19th ... | https://en.wikipedia.org/wiki/Stamp_sand |
Stamped asphalt is a decorative product which is made by transforming regular asphalt into imitation brick , stone , or slate . The process involves the creation of an impression into an asphalt surface using a combination of heat , a stamping template , and a plate compactor . Creating impressions in the asphalt can ... | https://en.wikipedia.org/wiki/Stamped_asphalt |
A stamped circuit board ( SCB ) is used to mechanically support and electrically connect electronic components using conductive pathways, tracks or traces etched from copper sheets laminated onto a non-conductive substrate . This technology is used for small circuits, for instance in the production of LEDs . [ 1 ]
Sim... | https://en.wikipedia.org/wiki/Stamped_circuit_board |
Stan Augarten is an American writer on the history of computing .
Stan Augarten received his M.A. in American History at Columbia University. [ 1 ] He has worked as an employee at Steve Jobs 's company NeXT . [ 2 ] Since 2002 he has lived in Paris , France . [ 3 ]
He is the author of two books: [ 4 ]
This biographic... | https://en.wikipedia.org/wiki/Stan_Augarten |
A stand guidance system is a system which gives information to a pilot attempting to park an aircraft at an airport stand, usually via visual methods, leading to the term Visual Docking Guidance System (VDGS) and also A-VDGS (the A standing for advanced) This allows them to remain clear of obstructions and ensures that... | https://en.wikipedia.org/wiki/Stand_guidance_system |
Standard Architecture for Universal Comment Extensions or SAUCE , as it is most commonly known, is an open metadata protocol for tagging and describing ASCII text files and other files, most of which generally center on or date back to the era of BBSing . SAUCE is very similar in nature to the MP3 ID3 tag format creat... | https://en.wikipedia.org/wiki/Standard_Architecture_for_Universal_Comment_Extensions |
Standard Army Maintenance System-Enhanced (SAMS-E) SAMS-E is a United States Army Logistics Information System considered a mission critical system. It supports Combat Services Support (CSS) Table of Organization and Equipment (TO&E) unit-level maintenance elements, Field and Sustainment maintenance shop production act... | https://en.wikipedia.org/wiki/Standard_Army_Maintenance_System_–_Enhanced |
The Standard Assessment Procedure (SAP) is the UK government's recommended method system for measuring the energy rating of residential dwellings . [ 1 ] The methodology is owned by the Department for Business, Energy & Industrial Strategy, and produced under licence by BRE. [ 2 ] The first version was published in 199... | https://en.wikipedia.org/wiki/Standard_Assessment_Procedure |
In mathematics , a standard Borel space is the Borel space associated with a Polish space . Except in the case of discrete Polish spaces, the standard Borel space is unique, up to isomorphism of measurable spaces .
A measurable space ( X , Σ ) {\displaystyle (X,\Sigma )} is said to be "standard Borel" if there exists... | https://en.wikipedia.org/wiki/Standard_Borel_space |
The Standard Commands for Programmable Instruments ( SCPI ; often pronounced "skippy") defines a standard for syntax and commands to use in controlling programmable test and measurement devices, such as automatic test equipment and electronic test equipment . [ 3 ]
SCPI was defined as an additional layer on top of the... | https://en.wikipedia.org/wiki/Standard_Commands_for_Programmable_Instruments |
The Standard Model of particle physics is the theory describing three of the four known fundamental forces ( electromagnetic , weak and strong interactions – excluding gravity ) in the universe and classifying all known elementary particles . It was developed in stages throughout the latter half of the 20th century, th... | https://en.wikipedia.org/wiki/Standard_Model |
The Standard Performance Evaluation Corporation ( SPEC ) is a non-profit consortium that establishes and maintains standardized benchmarks and performance evaluation tools for new generations of computing systems. SPEC was founded in 1988 and its membership comprises over 120 computer hardware and software vendors, edu... | https://en.wikipedia.org/wiki/Standard_Performance_Evaluation_Corporation |
The Standard addition method, also called known addition , often used in analytical chemistry , quantifies the analyte present in an unknown. This method is useful for analyzing complex samples where a matrix effect interferes with the analyte signal. In comparison to the calibration curve method, the standard addition... | https://en.wikipedia.org/wiki/Standard_addition |
In coding theory , a standard array (or Slepian array) is a q n − k {\displaystyle q^{n-k}} by q k {\displaystyle q^{k}} array that lists all elements of a particular F q n {\displaystyle \mathbb {F} _{q}^{n}} vector space . Standard arrays are used to decode linear codes ; i.e. to find the corresponding codeword for a... | https://en.wikipedia.org/wiki/Standard_array |
The standard atomic weight of a chemical element (symbol A r °(E) for element "E") is the weighted arithmetic mean of the relative isotopic masses of all isotopes of that element weighted by each isotope's abundance on Earth . For example, isotope 63 Cu ( A r = 62.929) constitutes 69% of the copper on Earth, the rest ... | https://en.wikipedia.org/wiki/Standard_atomic_weight |
In mathematics , the standard basis (also called natural basis or canonical basis ) of a coordinate vector space (such as R n {\displaystyle \mathbb {R} ^{n}} or C n {\displaystyle \mathbb {C} ^{n}} ) is the set of vectors, each of whose components are all zero, except one that equals 1. [ 1 ] For example, in the case ... | https://en.wikipedia.org/wiki/Standard_basis |
The cosmic distance ladder (also known as the extragalactic distance scale ) is the succession of methods by which astronomers determine the distances to celestial objects. A direct distance measurement of an astronomical object is possible only for those objects that are "close enough" (within about a thousand parsecs... | https://en.wikipedia.org/wiki/Standard_candle |
Standard components is a food technology term, when manufacturers buy in a standard component they would use a pre-made product in the production of their food.
They help products to be the same in consistency, they are quick and easy to use in batch production of food products.
Some examples are pre-made stock cubes, ... | https://en.wikipedia.org/wiki/Standard_components_(food_processing) |
Standard cubic centimeters per minute ( SCCM ) is a unit used to quantify the flow rate of a fluid. 1 SCCM is identical to 1 cm³ STP /min. Another expression of it would be Nml/min. These standard conditions vary according to different regulatory bodies. One example of standard conditions for the calculation of SCCM i... | https://en.wikipedia.org/wiki/Standard_cubic_centimetres_per_minute |
In work measurement , a standard data system (SDS) is a database of normal time values, usually organized by work elements that can be used to establish time standards for tasks composed of work elements similar to those in the database. | https://en.wikipedia.org/wiki/Standard_data_system |
Standard dimension ratio ( SDR ) is a method of rating a pipe's durability against pressure . The standard dimension ratio describes the correlation between the pipe dimension and the thickness of the pipe wall. [ 1 ]
Common nominations are SDR11, SDR17, SDR26 and SDR35. Pipes with a lower SDR can withstand higher pr... | https://en.wikipedia.org/wiki/Standard_dimension_ratio |
The data below tabulates standard electrode potentials ( E °), in volts relative to the standard hydrogen electrode (SHE), at:
Variations from these ideal conditions affect measured voltage via the Nernst equation .
Electrode potentials of successive elementary half-reactions cannot be directly added. However, the c... | https://en.wikipedia.org/wiki/Standard_electrode_potential_(data_page) |
In chemistry and thermodynamics , the standard enthalpy of formation or standard heat of formation of a compound is the change of enthalpy during the formation of 1 mole of the substance from its constituent elements in their reference state , with all substances in their standard states . The standard pressure value p... | https://en.wikipedia.org/wiki/Standard_enthalpy_of_formation |
The standard enthalpy of reaction (denoted Δ H reaction ⊖ {\displaystyle \Delta H_{\text{reaction}}^{\ominus }} ) for a chemical reaction is the difference between total product and total reactant molar enthalpies , calculated for substances in their standard states . The value can be approximately interpreted in terms... | https://en.wikipedia.org/wiki/Standard_enthalpy_of_reaction |
In mathematics , particularly in linear algebra , a flag is an increasing sequence of subspaces of a finite-dimensional vector space V . Here "increasing" means each is a proper subspace of the next (see filtration ):
The term flag is motivated by a particular example resembling a flag : the zero point, a line, and a ... | https://en.wikipedia.org/wiki/Standard_flag |
Standard flowgram format (SFF) is a binary file format used to encode results of pyrosequencing from the 454 Life Sciences platform for high-throughput sequencing . SFF files can be viewed, edited and converted with DNA Baser SFF Workbench (graphic tool), or converted to FASTQ format with sff2fastq or seq_crumbs .
NCB... | https://en.wikipedia.org/wiki/Standard_flowgram_format |
The standard acceleration of gravity or standard acceleration of free fall , often called simply standard gravity and denoted by ɡ 0 or ɡ n , is the nominal gravitational acceleration of an object in a vacuum near the surface of the Earth . It is a constant defined by standard as 9.806 65 m/s 2 (about 32.174 05 ft/s 2 ... | https://en.wikipedia.org/wiki/Standard_gravity |
The standard linear solid (SLS) , also known as the Zener model after Clarence Zener , [ 1 ] is a method of modeling the behavior of a viscoelastic material using a linear combination of springs and dashpots to represent elastic and viscous components, respectively. Often, the simpler Maxwell model and the Kelvin–Voig... | https://en.wikipedia.org/wiki/Standard_linear_solid_model |
The standard liter per minute ( SLM or SLPM ) is a unit of (molar or) mass flow rate of a gas at standard conditions for temperature and pressure (STP), which is most commonly practiced in the United States, whereas European practice revolves around the normal litre per minute (NLPM). [ 1 ] Until 1982, STP was defined ... | https://en.wikipedia.org/wiki/Standard_litre_per_minute |
In set theory , a standard model for a theory T is a model M for T where the membership relation ∈ M is the same as the membership relation ∈ of a set theoretical universe V (restricted to the domain of M ). In other words, M is a substructure of V. A standard model M that satisfies the additional transitivity conditio... | https://en.wikipedia.org/wiki/Standard_model_(set_theory) |
In chemistry , the standard molar entropy is the entropy content of one mole of pure substance at a standard state of pressure and any temperature of interest. These are often (but not necessarily) chosen to be the standard temperature and pressure .
The standard molar entropy at pressure = P 0 {\displaystyle P^{0}} i... | https://en.wikipedia.org/wiki/Standard_molar_entropy |
Standard page is a unit of information measurement for the amount of text in publishing . A standard page is approximately equal to a single page of text typed on a typewriter .
Despite the name, the unit is not formally standardized, and various entities use various standards for a standard page length:
Here, unless... | https://en.wikipedia.org/wiki/Standard_page |
In nonstandard analysis , the standard part function is a function from the limited (finite) hyperreal numbers to the real numbers. Briefly, the standard part function "rounds off" a finite hyperreal to the nearest real. It associates to every such hyperreal x {\displaystyle x} , the unique real x 0 {\displaystyle x_... | https://en.wikipedia.org/wiki/Standard_part_function |
The standard solar model ( SSM ) is a mathematical model of the Sun as a spherical ball of gas (in varying states of ionisation , with the hydrogen in the deep interior being a completely ionised plasma ). This stellar model, technically the spherically symmetric quasi-static model of a star , has stellar structure des... | https://en.wikipedia.org/wiki/Standard_solar_model |
In analytical chemistry , a standard solution ( titrant or titrator ) is a solution containing an accurately known concentration . Standard solutions are generally prepared by dissolving a solute of known mass into a solvent to a precise volume, or by diluting a solution of known concentration with more solvent. [ 1 ] ... | https://en.wikipedia.org/wiki/Standard_solution |
The standard state of a material (pure substance , mixture or solution ) is a reference point used to calculate its properties under different conditions. A degree sign (°) or a superscript ⦵ symbol ( ⦵ ) is used to designate a thermodynamic quantity in the standard state, such as change in enthalpy (Δ H °), change in ... | https://en.wikipedia.org/wiki/Standard_state |
In computer science, the standard swap or three point turn [ citation needed ] is a programming paradigm that exchanges the values of two variables .
By using a third variable, whose value is otherwise of no concern, to hold the value of the first, and then assigning the second's to the first, and the third's back to ... | https://en.wikipedia.org/wiki/Standard_swap |
A standard test image is a digital image file used across different institutions to test image processing and image compression algorithms. By using the same standard test images, different labs are able to compare results, both visually and quantitatively.
The images are in many cases chosen to represent natural or ... | https://en.wikipedia.org/wiki/Standard_test_image |
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