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In multicellular organisms , stem cells are undifferentiated or partially differentiated cells that can change into various types of cells and proliferate indefinitely to produce more of the same stem cell. They are the earliest type of cell in a cell lineage . [ 1 ] They are found in both embryonic and adult organisms... | https://en.wikipedia.org/wiki/Stem_cell |
Stem cell laws are the law rules, and policy governance concerning the sources, research, and uses in treatment of stem cells in humans. These laws have been the source of much controversy and vary significantly by country. [ 1 ] In the European Union , stem cell research using the human embryo is permitted in Sweden ,... | https://en.wikipedia.org/wiki/Stem_cell_laws |
The laws and policies regarding stem cell research in the People's Republic of China are relatively relaxed in comparison to that of other nations. The reason for this is due to different traditional and cultural views in relation to that of the West.
China has one of the most unrestrictive embryonic stem cell researc... | https://en.wikipedia.org/wiki/Stem_cell_laws_and_policy_in_China |
Iran's flexible approach towards stem-cell research is linked to the Shia tradition being flexible enough to allow for ESCs science; the second is that the approval of ESCs research was made easier by permissive laws governing other areas of biomedicine, such as new assisted reproductive technologies; and the third is ... | https://en.wikipedia.org/wiki/Stem_cell_laws_and_policy_in_Iran |
Stem cell laws and policy in the United States have had a complicated legal and political history.
Stem cells are cells found in all multi-cellular organisms. They were isolated in mice in 1981, and in humans in 1998. [ 1 ] In humans there are many types of stem cells, each with varying levels of potency. Potency is a... | https://en.wikipedia.org/wiki/Stem_cell_laws_and_policy_in_the_United_States |
Stem cell markers are genes and their protein products used by scientists to isolate and identify stem cells . Stem cells can also be identified by functional assays. Below is a list of genes/protein products that can be used to identify various types of stem cells, or functional assays that do the same. [ 1 ] The ini... | https://en.wikipedia.org/wiki/Stem_cell_marker |
Stem cell research policy varies significantly throughout the world. There are overlapping jurisdictions of international organizations, nations, and states or provinces. Some government policies determine what is allowed versus prohibited, whereas others outline what research can be publicly financed. Of course, all p... | https://en.wikipedia.org/wiki/Stem_cell_research_policy |
The stem cell secretome (also referred to as the stromal cell secretome ) is a collective term for the paracrine soluble factors produced by stem cells and utilized for their inter-cell communication . In addition to inter-cell communication, the paracrine factors are also responsible for tissue development, homeostasi... | https://en.wikipedia.org/wiki/Stem_cell_secretome |
Stem cell therapy for macular degeneration is an emerging treatment approach aimed at restoring vision in individuals suffering from various forms of macular degeneration, particularly age-related macular degeneration (AMD). [ 1 ] This therapy involves the transplantation of stem cells into the retina to replace damage... | https://en.wikipedia.org/wiki/Stem_cell_therapy_for_macular_degeneration |
In phylogenetics , the crown group or crown assemblage is a collection of species composed of the living representatives of the collection, the most recent common ancestor of the collection, and all descendants of the most recent common ancestor. It is thus a way of defining a clade , a group consisting of a species an... | https://en.wikipedia.org/wiki/Stem_group |
Stem-mixing is a method of mixing audio material based on creating groups of audio tracks called stems and processing them separately prior to combining them into a final master mix. Stems are also sometimes referred to as submixes, subgroups, or buses .
The distinction between a stem and a separation is rather unclea... | https://en.wikipedia.org/wiki/Stem_mixing_and_mastering |
Stemagen is a corporation headed by Dr. Samuel Wood , notable for cloning adult skin cells [ 1 ] [ 2 ] In January 2008, Dr. Andrew French, Stemagen's chief scientific officer and Wood in California , announced that they successfully created the first 5 mature human embryos using DNA from adult skin cells, aiming to pro... | https://en.wikipedia.org/wiki/Stemagen |
In hydrology , stemflow is the flow of intercepted water down the trunk or stem of a plant . Stemflow, along with throughfall , is responsible for the transferral of precipitation and nutrients from the canopy to the soil . In tropical rainforests , where this kind of flow can be substantial, erosion gullies can form a... | https://en.wikipedia.org/wiki/Stemflow |
Textual criticism [ a ] is a branch of textual scholarship , philology , and literary criticism that is concerned with the identification of textual variants, or different versions, of either manuscripts (mss) or of printed books. Such texts may range in dates from the earliest writing in cuneiform , impressed on clay,... | https://en.wikipedia.org/wiki/Stemmatics |
A stenotherm (from Greek στενός stenos "narrow" and θέρμη therme "heat") is a species or living organism capable of surviving only within a narrow temperature range. This specialization is often found in organisms that inhabit environments with relatively stable environments, such as deep sea environments or polar reg... | https://en.wikipedia.org/wiki/Stenotherm |
Stentrode ( Stent-electrode recording array ) is a small stent -mounted electrode array permanently implanted into a blood vessel in the brain, without the need for open brain surgery. It is in clinical trials as a brain–computer interface (BCI) for people with paralyzed or missing limbs, [ 1 ] who will use their neura... | https://en.wikipedia.org/wiki/Stent-electrode_recording_array |
A stenter (sometimes called a tenter) [ 1 ] is a machine used in textile finishing . It serves multiple purposes, including heat setting , drying, and applying various chemical treatments . This may be achieved through the use of certain attachments such as padding or coating . [ 2 ] [ 3 ]
The machine works by holding... | https://en.wikipedia.org/wiki/Stenter |
The step response of a system in a given initial state consists of the time evolution of its outputs when its control inputs are Heaviside step functions . In electronic engineering and control theory , step response is the time behaviour of the outputs of a general system when its inputs change from zero to one in a v... | https://en.wikipedia.org/wiki/Step_response |
Stephan Körner , FBA (26 September 1913 – 17 August 2000 [ a ] ) was a British philosopher, who specialised in the work of Kant , the study of concepts , and in the philosophy of mathematics .
Born to a Jewish family in what would soon become Czechoslovakia , Körner left that country to avoid certain death at the hand... | https://en.wikipedia.org/wiki/Stephan_Körner |
Space Operations and Astronaut Training,
German Space Agency (DLR)
Stephan Ulamec is an Austrian geophysicist , born in Salzburg on January 27, 1966, with more than 100 articles in peer-reviewed journals and several participations in space missions and payloads operated by diverse space agencies. [ 1 ] [ 2 ] He is wo... | https://en.wikipedia.org/wiki/Stephan_Ulamec |
Stephanie Lee Brock is an American chemist who is professor of inorganic chemistry at Wayne State University . Her research considers transition metal pnictides and chalcogenide nanomaterials. She is a Fellow of the American Association for the Advancement of Science and the American Chemical Society .
Brock completed... | https://en.wikipedia.org/wiki/Stephanie_Brock |
Stephen C. Harrison is professor of biological chemistry and molecular pharmacology, professor of pediatrics, and director of the Center for Molecular and Cellular Dynamics of Harvard Medical School , head of the Laboratory of Molecular Medicine at Boston Children's Hospital , and investigator of the Howard Hughes Medi... | https://en.wikipedia.org/wiki/Stephen_C._Harrison |
Stephen Lee ( Chinese : 李中漢 ; pinyin : Lǐ Zhōnghàn ; born 25 October 1955) is an American chemist. He is the son of Tsung-Dao Lee , the winner of the 1957 Nobel Prize in Physics . He is currently a professor at Cornell University . [ 1 ]
Lee attended the International School of Geneva , Switzerland and Yale University... | https://en.wikipedia.org/wiki/Stephen_Lee_(chemist) |
Stephen O'Brien (born 27 February 1991) is an Irish Gaelic footballer who plays for the Kenmare Shamrocks club and at senior level for the Kerry county team since 2014. [ 1 ]
He joined the county's under-21 team in 2011. Kerry sustained a 22-point loss to Cork in the Munster final. He was still underage in 2012 and fo... | https://en.wikipedia.org/wiki/Stephen_O'Brien_(Kerry_Gaelic_footballer) |
Stephen Webb (born February 25, 1963) is a physicist and author of numerous popular science and math books, as well as academic publications. Webb was educated at Bristol University (BSc (Hons) Physics – First Class) and, as a graduate student, attended Manchester University (PhD – Theoretical Particle Physics). Webb i... | https://en.wikipedia.org/wiki/Stephen_Webb_(scientist) |
Stephen Yablo ( / ˈ j æ b l oʊ / ; [ 1 ] born 1957) is a Canadian-born American philosopher. He is the Emeritus David W. Skinner Professor of Philosophy at the Massachusetts Institute of Technology (MIT) and taught previously at the University of Michigan, Ann Arbor . [ 2 ] He specializes in the philosophy of logic , p... | https://en.wikipedia.org/wiki/Stephen_Yablo |
Stephen aldehyde synthesis , a named reaction in chemistry, was invented by Henry Stephen ( OBE / MBE ). This reaction involves the preparation of aldehydes (R-CHO) from nitriles (R-CN) using tin(II) chloride (SnCl 2 ), hydrochloric acid (HCl) and quenching the resulting iminium salt ([R-CH=NH 2 ] + Cl − ) with water ... | https://en.wikipedia.org/wiki/Stephen_aldehyde_synthesis |
A steppe belt is a contiguous phytogeographic region of predominantly grassland ( steppe ), which has common characteristics in soil , climate , vegetation and fauna . [ 1 ]
A forest-steppe belt is a region of forest steppe .
The largest steppe and (forest-steppe) belt is the Eurasian steppe belt which stretches from... | https://en.wikipedia.org/wiki/Steppe_belt |
The Steppic Biogeographic Region is a biogeographic region of Europe, as defined by the European Environment Agency .
The Steppic region encompasses parts of Romania, Moldova, Ukraine, Russia, and western Kazakhstan. Additionally, it extends further west into Asia. This vast region is characterized by low-lying plains... | https://en.wikipedia.org/wiki/Steppic_Biogeographic_Region |
In floating-point arithmetic , the Sterbenz lemma or Sterbenz's lemma [ 1 ] is a theorem giving conditions under which floating-point differences are computed exactly.
It is named after Pat H. Sterbenz, who published a variant of it in 1974. [ 2 ]
Sterbenz lemma — In a floating-point number system with subnormal numbe... | https://en.wikipedia.org/wiki/Sterbenz_lemma |
Stercobilin is a tetrapyrrolic bile pigment and is one end-product of heme catabolism . [ 1 ] [ 2 ] It is the chemical responsible for the brown color of human feces and was originally isolated from feces in 1932. Stercobilin (and related urobilin ) can be used as a marker for biochemical identification of fecal pollut... | https://en.wikipedia.org/wiki/Stercobilin |
The stereo cameras approach is a method of distilling a noisy video signal into a coherent data set that a computer can begin to process into actionable symbolic objects, or abstractions. Stereo cameras is one of many approaches used in the broader fields of computer vision and machine vision . [ 1 ]
In this approach,... | https://en.wikipedia.org/wiki/Stereo_cameras |
The stereoautograph is a complex opto-mechanical measurement instrument for the evaluation of analog or digital photograms . It is based on the stereoscopy effect by using two aero photos or two photograms of the topography or of buildings from different standpoints.
It was invented by Eduard von Orel in 1907. [ 1 ]
... | https://en.wikipedia.org/wiki/Stereoautograph |
In stereochemistry , a stereocenter of a molecule is an atom (center), axis or plane that is the focus of stereoisomerism ; that is, when having at least three different groups bound to the stereocenter, interchanging any two different groups creates a new stereoisomer . [ 1 ] [ 2 ] Stereocenters are also referred to a... | https://en.wikipedia.org/wiki/Stereocenter |
Stereochemistry , a subdiscipline of chemistry , studies the spatial arrangement of atoms that form the structure of molecules and their manipulation. [ 1 ] The study of stereochemistry focuses on the relationships between stereoisomers , which are defined as having the same molecular formula and sequence of bonded ato... | https://en.wikipedia.org/wiki/Stereochemistry |
In chemistry , primarily organic and computational chemistry , a stereoelectronic effect [ 1 ] is an effect on molecular geometry , reactivity , or physical properties due to spatial relationships in the molecules ' electronic structure , in particular the interaction between atomic and/or molecular orbitals . [ 2 ] Ph... | https://en.wikipedia.org/wiki/Stereoelectronic_effect |
In mathematics , a stereographic projection is a perspective projection of the sphere , through a specific point on the sphere (the pole or center of projection ), onto a plane (the projection plane ) perpendicular to the diameter through the point. It is a smooth , bijective function from the entire sphere except the ... | https://en.wikipedia.org/wiki/Stereographic_projection |
In stereochemistry , stereoisomerism , or spatial isomerism , is a form of isomerism in which molecules have the same molecular formula and sequence of bonded atoms (constitution), but differ in the three-dimensional orientations of their atoms in space. [ 1 ] [ 2 ] This contrasts with structural isomers , which share ... | https://en.wikipedia.org/wiki/Stereoisomerism |
Stereology is the three-dimensional interpretation of two-dimensional cross sections of materials or tissues. It provides practical techniques for extracting quantitative information about a three-dimensional material from measurements made on two-dimensional planar sections of the material. Stereology is a method that... | https://en.wikipedia.org/wiki/Stereology |
Stereopsis recovery , also recovery from stereoblindness , is the phenomenon of a stereoblind person gaining partial or full ability of stereo vision ( stereopsis ).
Recovering stereo vision as far as possible has long been established as an approach to the therapeutic treatment of stereoblind patients. Treatment aims... | https://en.wikipedia.org/wiki/Stereopsis_recovery |
Stereoscopic spectroscopy is a type of imaging spectroscopy that can extract a few spectral parameters over a complete image plane simultaneously. A stereoscopic spectrograph is similar to a normal spectrograph except that (A) it has no slit, and (B) multiple spectral orders (often including the non- dispersed zero or... | https://en.wikipedia.org/wiki/Stereoscopic_spectroscopy |
In chemistry , stereoselectivity [ 1 ] is the property of a chemical reaction in which a single reactant forms an unequal mixture of stereoisomers during a non- stereospecific creation of a new stereocenter or during a non-stereospecific transformation of a pre-existing one. [ 2 ] The selectivity arises from difference... | https://en.wikipedia.org/wiki/Stereoselectivity |
In chemistry , stereospecificity is the property of a reaction mechanism that leads to different stereoisomeric reaction products from different stereoisomeric reactants , or which operates on only one (or a subset) of the stereoisomers. [ 1 ] [ 2 ] [ 3 ]
In contrast, stereoselectivity [ 1 ] [ 2 ] is the property of a... | https://en.wikipedia.org/wiki/Stereospecificity |
Stereotactic biopsy , also known as stereotactic core biopsy , is a biopsy procedure that uses a computer and imaging performed in at least two planes to localize a target lesion (such as a tumor or microcalcifications in the breast) in three-dimensional space and guide the removal of tissue for examination by a pathol... | https://en.wikipedia.org/wiki/Stereotactic_biopsy |
Steric effects arise from the spatial arrangement of atoms. When atoms come close together there is generally a rise in the energy of the molecule. Steric effects are nonbonding interactions that influence the shape ( conformation ) and reactivity of ions and molecules. Steric effects complement electronic effects , wh... | https://en.wikipedia.org/wiki/Steric_effects |
The steric factor , usually denoted ρ , [ 1 ] is a quantity used in collision theory .
Also called the probability factor , the steric factor is defined as the ratio between the experimental value of the rate constant and the one predicted by collision theory. It can also be defined as the ratio between the pre-expo... | https://en.wikipedia.org/wiki/Steric_factor |
Valence shell electron pair repulsion ( VSEPR ) theory ( / ˈ v ɛ s p ər , v ə ˈ s ɛ p ər / VESP -ər , [ 1 ] : 410 və- SEP -ər [ 2 ] ) is a model used in chemistry to predict the geometry of individual molecules from the number of electron pairs surrounding their central atoms. [ 3 ] It is also named the Gillespie-Nyhol... | https://en.wikipedia.org/wiki/Steric_number |
In chemistry , a sterically induced reduction happens when an oxidized metal behaves as, and exhibits similar reducing properties to, the more reduced form of the metal. This effect is mainly caused by the surrounding ligands that are complexed to the metal and it is the ligands that are involved in the reduction chem... | https://en.wikipedia.org/wiki/Sterically_induced_reduction |
Stericycle, Inc. is a compliance company that specializes in collecting and disposing regulated medical waste, such as medical waste and sharps, pharmaceuticals, hazardous waste, and providing services for recalled and expired goods. It also provides related education and training services, and patient communication se... | https://en.wikipedia.org/wiki/Stericycle |
The sterile fungi , or mycelia sterilia , are a group of fungi that do not produce any known spores , either sexual or asexual . This is considered a form group, not a taxonomic division , and is used as a matter of convenience only, as various isolates within such morphotypes could include distantly related taxa or di... | https://en.wikipedia.org/wiki/Sterile_fungi |
Sterility is the physiological inability to effect sexual reproduction in a living thing, members of whose kind have been produced sexually. Sterility has a wide range of causes. It may be an inherited trait , as in the mule; or it may be acquired from the environment, for example through physical injury or disease , o... | https://en.wikipedia.org/wiki/Sterility_(physiology) |
In microbiology , sterility assurance level ( SAL ) is the probability that a single unit that has been subjected to sterilization nevertheless remains nonsterile.
It is never possible to prove that all organisms have been destroyed, as the likelihood of survival of an individual microorganism is never zero. So SAL is... | https://en.wikipedia.org/wiki/Sterility_assurance_level |
Sterilization ( British English : sterilisation ) refers to any process that removes, kills, or deactivates all forms of life (particularly microorganisms such as fungi , bacteria , spores , and unicellular eukaryotic organisms) and other biological agents (such as prions or viruses ) present in fluid or on a specific ... | https://en.wikipedia.org/wiki/Sterilization_(microbiology) |
A sterimol parameter is a set of vectors which describes the steric occupancy of a molecule. First developed by Verloop in the 1970s. [ 1 ] Sterimol parameters found extensive application in quantitative structure-activity relationship (QSAR) studies for drug discovery . [ 2 ] [ 3 ] Introduction of Sterimol parameters ... | https://en.wikipedia.org/wiki/Sterimol_parameter |
The Sterling 10.5 axle is an automotive axle manufactured by Ford Motor Company at the Sterling Axle Plant in Sterling Heights, MI . It was first used in model year 1985 Ford trucks. The axle was developed to replace the Dana 60 and Dana 70 . The Sterling 10.5 axle is currently only made as a full floating axle.
Ori... | https://en.wikipedia.org/wiki/Sterling_10.5_axle |
Sterling silver is an alloy composed by weight of 92.5% silver and 7.5% other metals , usually copper . The sterling silver standard has a minimum millesimal fineness of 925.
Fine silver , which is 99.9% pure silver, is relatively soft, so silver is usually alloyed with copper to increase its hardness and strength. St... | https://en.wikipedia.org/wiki/Sterling_silver |
The dorsal plane (also known as the coronal plane or frontal plane , especially in human anatomy) is an anatomical plane that divides the body into dorsal and ventral sections [ 1 ] . It is perpendicular to the sagittal and transverse planes.
The coronal plane is an example of a longitudinal plane . For a human, the m... | https://en.wikipedia.org/wiki/Sternal_plane |
The Stern–Volmer relationship , named after Otto Stern and Max Volmer , [ 1 ] allows the kinetics of a photophysical intermolecular deactivation process to be explored.
Processes such as fluorescence and phosphorescence are examples of intramolecular deactivation ( quenching ) processes. An intermolecular deactivation... | https://en.wikipedia.org/wiki/Stern–Volmer_relationship |
Steroid-induced skin atrophy is thinning of the skin at the level of the epidermis as a result of prolonged exposure to topical steroids . This is the most common side effect of overuse or misuse of topical steroids. [ 6 ] Topical steroids are typically prescribed for psoriasis, atopic dermatitis (eczema), and other it... | https://en.wikipedia.org/wiki/Steroid-induced_skin_atrophy |
1584
13072
ENSG00000160882
ENSMUSG00000022589
P15538
P15539
NM_000497 NM_001026213
NM_009991
NP_000488 NP_001021384
NP_034121
Steroid 11β-hydroxylase , also known as steroid 11β-monooxygenase , is a steroid hydroxylase found in the zona glomerulosa and zona fasciculata of the adrenal cortex . Named officially... | https://en.wikipedia.org/wiki/Steroid_11β-hydroxylase |
The steroidogenic acute regulatory protein , commonly referred to as StAR ( STARD1 ), is a transport protein that regulates cholesterol transfer within the mitochondria , which is the rate-limiting step in the production of steroid hormones. It is primarily present in steroid-producing cells, including theca cells and... | https://en.wikipedia.org/wiki/Steroidogenic_acute_regulatory_protein |
The Stetter reaction is a reaction used in organic chemistry to form carbon-carbon bonds through a 1,4-addition reaction utilizing a nucleophilic catalyst . [ 1 ] While the related 1,2-addition reaction, the benzoin condensation , was known since the 1830s, the Stetter reaction was not reported until 1973 by Dr. Herman... | https://en.wikipedia.org/wiki/Stetter_reaction |
Stephen Alan Owens (born August 19, 1955) is an American attorney and politician. Originally from Memphis, Tennessee , he served as chief counsel and state director for U.S. Senator Al Gore before moving to the Phoenix, Arizona area during Gore's unsuccessful presidential run in 1988. He was a fundraiser for the Clinto... | https://en.wikipedia.org/wiki/Steve_Owens_(Arizona_politician) |
Steve Shnider ( Hebrew : סטיב שניידר ) is a retired professor of mathematics at Bar Ilan University . [ 1 ] He received a PhD in Mathematics from Harvard University in 1972, under Shlomo Sternberg . [ 2 ] His main interests are in the differential geometry of fiber bundles ; algebraic methods in the theory of deformati... | https://en.wikipedia.org/wiki/Steve_Shnider |
Steven M. Bachrach is an organic chemist who took up the position of Dean of Science at Monmouth University in 2016. Bachrach had previously been the Dr D. R. Semmes Distinguished Professor of Chemistry at Trinity University in San Antonio, Texas. [ 1 ] Bachrach is the author of the textbook Computational Organic Chem... | https://en.wikipedia.org/wiki/Steven_Bachrach |
Steven G Arless is a Canadian entrepreneur in the biomedical technology industry. [ 1 ] He directed and developed several medical device companies treating cardiovascular disease from inception through major financing and public stock offering, advancing new medical devices from R&D to commercialization and global sale... | https://en.wikipedia.org/wiki/Steven_G_Arless |
Steven T. Bramwell (born 7 June 1961) is a British physicist and chemist who works at the London Centre for Nanotechnology and the Department of Physics and Astronomy, University College London . He is known for his experimental discovery of spin ice with M. J. Harris and his calculation of a critical exponent observed... | https://en.wikipedia.org/wiki/Steven_T._Bramwell |
The Stevens Award is a software engineering lecture award given by the Reengineering Forum, an industry association. The international Stevens Award was created to recognize outstanding contributions to the literature or practice of methods for software and systems development . The first award was given in 1995. The p... | https://en.wikipedia.org/wiki/Stevens_Award |
The Stevens rearrangement in organic chemistry is an organic reaction converting quaternary ammonium salts and sulfonium salts to the corresponding amines or sulfides in presence of a strong base in a 1,2-rearrangement . [ 1 ]
The reactants can be obtained by alkylation of the corresponding amines and sulfides. The su... | https://en.wikipedia.org/wiki/Stevens_rearrangement |
A Stevenson screen or instrument shelter is a shelter or an enclosure used to protect meteorological instruments against precipitation and direct heat radiation from outside sources, while still allowing air to circulate freely around them. [ 1 ] It forms part of a standard weather station and holds instruments that ma... | https://en.wikipedia.org/wiki/Stevenson_screen |
A stew pond or stewpond or stew is a fish pond used to store live fish ready for eating. [ 1 ]
In medieval Europe, monasteries often maintained attached stews to supply fish over the winter.
This article about a building or structure type is a stub . You can help Wikipedia by expanding it . | https://en.wikipedia.org/wiki/Stew_pond |
Stewardship cessation [ 1 ] is a concept useful in system engineering . Certain systems remain hazardous for a considerable period after their useful life, and will usually be managed to ensure that the public and the environment is not exposed to the hazard. It is incumbent on the systems designer to consider the outc... | https://en.wikipedia.org/wiki/Stewardship_cessation |
In geometry , Stewart's theorem yields a relation between the lengths of the sides and the length of a cevian in a triangle. Its name is in honour of the Scottish mathematician Matthew Stewart , who published the theorem in 1746. [ 1 ]
Let a , b , c be the lengths of the sides of a triangle. Let d be the length of a ... | https://en.wikipedia.org/wiki/Stewart's_theorem |
In fluid dynamics , a Stewartson layer is a thin cylindrical shear layer that connects two differentially rotating regions in the radial direction, namely the inside and outside the cylinder. The Stewartson layer, typically, also connects different Ekman boundary layers in the axial direction. The layer was first ident... | https://en.wikipedia.org/wiki/Stewartson_layer |
The Stewart–Walker lemma provides necessary and sufficient conditions for the linear perturbation of a tensor field to be gauge -invariant. Δ δ T = 0 {\displaystyle \Delta \delta T=0} if and only if one of the following holds
1. T 0 = 0 {\displaystyle T_{0}=0}
2. T 0 {\displaystyle T_{0}} is a constant scalar field
... | https://en.wikipedia.org/wiki/Stewart–Walker_lemma |
Excess-3 , 3-excess [ 1 ] [ 2 ] [ 3 ] or 10-excess-3 binary code (often abbreviated as XS-3 , [ 4 ] 3XS [ 1 ] or X3 [ 5 ] [ 6 ] ), shifted binary [ 7 ] or Stibitz code [ 1 ] [ 2 ] [ 8 ] [ 9 ] (after George Stibitz , [ 10 ] who built a relay-based adding machine in 1937 [ 11 ] [ 12 ] ) is a self-complementary binary-cod... | https://en.wikipedia.org/wiki/Stibitz_code |
The reflected binary code ( RBC ), also known as reflected binary ( RB ) or Gray code after Frank Gray , is an ordering of the binary numeral system such that two successive values differ in only one bit (binary digit).
For example, the representation of the decimal value "1" in binary would normally be " 001 ", and "... | https://en.wikipedia.org/wiki/Stibitz–Gray_code |
Stibnite , sometimes called antimonite , is a sulfide mineral , a mineral form of antimony trisulfide ( Sb 2 S 3 ). It is a soft, metallic grey crystalline solid with an orthorhombic space group. [ 6 ] It is the most important source for the metalloid antimony . [ 7 ] The name is derived from the Greek στίβι stibi th... | https://en.wikipedia.org/wiki/Stibnite |
Stibole is a theoretical heterocyclic organic compound , a five-membered ring with the formula C 4 H 4 Sb H. It is classified as a metallole . It can be viewed as a structural analog of pyrrole , with antimony replacing the nitrogen atom of pyrrole. Stibole itself is very rare, but many substituted derivatives have bee... | https://en.wikipedia.org/wiki/Stibole |
A sticker is a detailed illustration of a character that represents an emotion or action that is a mix of cartoons and Japanese smiley-like " emojis " sent through instant messaging platforms. They have more variety than emoticons and have a basis from internet "reaction face" culture due to their ability to portray bo... | https://en.wikipedia.org/wiki/Sticker_(messaging) |
Sticking coefficient is the term used in surface physics to describe the ratio of the number of adsorbate atoms (or molecules ) that adsorb , or "stick", to a surface to the total number of atoms that impinge upon that surface during the same period of time . [ 1 ] Sometimes the symbol S c is used to denote this coeffi... | https://en.wikipedia.org/wiki/Sticking_coefficient |
The sticking probability is the probability that molecules are trapped on surfaces and adsorb chemically. From Langmuir's adsorption isotherm , molecules cannot adsorb on surfaces when the adsorption sites are already occupied by other molecules, so the sticking probability can be expressed as follows:
S = S 0 ( 1 − θ... | https://en.wikipedia.org/wiki/Sticking_probability |
Stickland fermentation or The Stickland Reaction [ 1 ] is the name for a chemical reaction that involves the coupled oxidation and reduction of amino acids to organic acids. The electron donor amino acid is oxidised to a volatile carboxylic acid one carbon atom shorter than the original amino acid. For example, alani... | https://en.wikipedia.org/wiki/Stickland_fermentation |
Sticky-shed syndrome is a condition created by the deterioration of the binders in a magnetic tape , which hold the ferric oxide magnetizable coating to its plastic carrier, or which hold the thinner back-coating on the outside of the tape. [ 1 ] This deterioration renders the tape unusable. [ 2 ] Some kinds of binder ... | https://en.wikipedia.org/wiki/Sticky-shed_syndrome |
DNA ends refer to the properties of the ends of linear DNA molecules, which in molecular biology are described as "sticky" or "blunt" based on the shape of the complementary strands at the terminus. In sticky ends , one strand is longer than the other (typically by at least a few nucleotides), such that the longer stra... | https://en.wikipedia.org/wiki/Sticky_and_blunt_ends |
In the field of management , sticky information is information that is costly to acquire, transfer, and use in a new location. Eric von Hippel coined the term around 1994. Because of the importance of sticky, local information for some kinds of innovation and product customization, von Hippel suggests that in certain c... | https://en.wikipedia.org/wiki/Sticky_information |
Sticky keys is an accessibility feature of some graphical user interfaces which assists users who have physical disabilities or helps users reduce repetitive strain injury . It serializes keystrokes; instead of being required to press multiple keys at a time, the user can press and release a modifier key , such as ⇧ Sh... | https://en.wikipedia.org/wiki/Sticky_keys |
A sticky mat , also called a tacky mat or cleanroom mat , is a mat with an adhesive surface that is placed at the entrances or exits to certain workplaces to remove contaminants from the bottoms of footwear and wheeled carts such as hand trucks . [ 2 ] They are an example of an engineering control within the hierarchy ... | https://en.wikipedia.org/wiki/Sticky_mat |
The stick–slip phenomenon , also known as the slip–stick phenomenon or simply stick–slip , is a type of motion exhibited by objects in contact sliding over one another. The motion of these objects is usually not perfectly smooth, but rather irregular, with brief accelerations (slips) interrupted by stops (sticks). Sti... | https://en.wikipedia.org/wiki/Stick–slip_phenomenon |
Stiction (a portmanteau of the words static and friction ) [ 1 ] is the force that needs to be overcome to enable relative motion of stationary objects in contact. [ 2 ] Any solid objects pressing against each other (but not sliding) will require some threshold of force parallel to the surface of contact in order to ov... | https://en.wikipedia.org/wiki/Stiction |
In mathematics , the Stiefel manifold V k ( R n ) {\displaystyle V_{k}(\mathbb {R} ^{n})} is the set of all orthonormal k -frames in R n . {\displaystyle \mathbb {R} ^{n}.} That is, it is the set of ordered orthonormal k -tuples of vectors in R n . {\displaystyle \mathbb {R} ^{n}.} It is named after Swiss mathematician... | https://en.wikipedia.org/wiki/Stiefel_manifold |
The Stieglitz Award was established in 1940 using funds from the memorial legacy of Professor Julius Stieglitz , who worked at the University of Chicago from 1892 to his death in 1937. The lecture was presented alternatively by the University of Chicago Chemistry department and the Chicago Section of the American Chemi... | https://en.wikipedia.org/wiki/Stieglitz_Lecture |
The Stieglitz rearrangement is a rearrangement reaction in organic chemistry which is named after the American chemist Julius Stieglitz (1867–1937) and was first investigated by him and Paul Nicholas Leech in 1913. [ 1 ] It describes the 1,2-rearrangement of trityl amine derivatives to triaryl imines . [ 1 ] [ 2 ] It i... | https://en.wikipedia.org/wiki/Stieglitz_rearrangement |
In mathematics , the Stieltjes constants are the numbers γ k {\displaystyle \gamma _{k}} that occur in the Laurent series expansion of the Riemann zeta function :
The constant γ 0 = γ = 0.577 … {\displaystyle \gamma _{0}=\gamma =0.577\dots } is known as the Euler–Mascheroni constant .
The Stieltjes constants are give... | https://en.wikipedia.org/wiki/Stieltjes_constants |
In mathematics , the Stieltjes moment problem , named after Thomas Joannes Stieltjes , seeks necessary and sufficient conditions for a sequence ( m 0 , m 1 , m 2 , ...) to be of the form
for some measure μ . If such a function μ exists, one asks whether it is unique.
The essential difference between this and other we... | https://en.wikipedia.org/wiki/Stieltjes_moment_problem |
A Stiff diagram , or Stiff pattern , is a graphical representation of chemical analyses, first developed by H.A. Stiff in 1951. It is widely used by hydrogeologists and geochemists to display the major ion composition of a water sample . A polygonal shape is created from four parallel horizontal axes extending on eithe... | https://en.wikipedia.org/wiki/Stiff_diagram |
Stiffening is any process that increases the rigidity and structural integrity of objects. Stiffening is used in crafts, art, industry, architecture, sports, aerospace, object construction, bookbinding, etc.
In mechanics , "stiffening" beams brings anti- buckling , anti-wrinkling, desired shaping, reinforcement, repai... | https://en.wikipedia.org/wiki/Stiffening |
Stiffness is the extent to which an object resists deformation in response to an applied force . [ 1 ]
The complementary concept is flexibility or pliability: the more flexible an object is, the less stiff it is. [ 2 ]
The stiffness, k , {\displaystyle k,} of a body is a measure of the resistance offered by an elasti... | https://en.wikipedia.org/wiki/Stiffness |
In the finite element method for the numerical solution of elliptic partial differential equations , the stiffness matrix is a matrix that represents the system of linear equations that must be solved in order to ascertain an approximate solution to the differential equation.
For simplicity, we will first consider the... | https://en.wikipedia.org/wiki/Stiffness_matrix |
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Stilbonematinae is a subfamily of the nematode worm family Desmodoridae that is notable for its symbiosis with sulfur-oxidizing bacteria .
Stilbonematinae Chitwood, 1936 belongs to the family Desmodoridae in the order Desmodorida. Nine genera have been described. [ 1 ]
Stilbonematines can be up to... | https://en.wikipedia.org/wiki/Stilbonematinae |
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