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A piezophile (from Greek "piezo-" for pressure and "-phile" for loving) is an organism with optimal growth under high hydrostatic pressure , i.e., an organism that has its maximum rate of growth at a hydrostatic pressure equal to or above 10 megapascals (99 atm; 1,500 psi), when tested over all permissible temperatures... | https://en.wikipedia.org/wiki/Piezophile |
Piezo-phototronic effect is a three-way coupling effect of piezoelectric, semiconductor and photonic properties in non-central symmetric semiconductor materials, using the piezoelectric potential (piezopotential) that is generated by applying a strain to a semiconductor with piezoelectricity to control the carrier gene... | https://en.wikipedia.org/wiki/Piezophototronics |
Piezospectroscopy (also known as photoluminescence piezospectroscopy ) is an analytical technique that reveals internal stresses in alumina -containing materials, particularly thermal barrier coatings (TBCs). A typical procedure involves illuminating the sample with laser light of a known wavelength, causing the materi... | https://en.wikipedia.org/wiki/Piezospectroscopy |
Piezotronics effect is using the piezoelectric potential (piezopotential) created in materials with piezoelectricity as a “gate” voltage to tune/control the charge carrier transport properties for fabricating new devices.
Neil A Downie showed how simple it was to build simple demonstrations on a macro-scale using a sa... | https://en.wikipedia.org/wiki/Piezotronics |
Piflufolastat ( 18 F) , sold under the brand name Pylarify among others, is a radioactive diagnostic agent used for positron emission tomography (PET) imaging . [ 1 ] [ 4 ] [ 5 ] It is given by intravenous injection. [ 1 ] [ 4 ]
The most common adverse reactions include headache, altered taste, and fatigue. [ 4 ]
Pif... | https://en.wikipedia.org/wiki/Piflufolastat_(18F) |
Pig-a gene mutation assay is a flow cytometry -based method for detecting mammalian cells that have inactivating mutations in the endogenous X-linked reporter gene called phosphatidyl inositolglycan class A gene ( PIG-A in humans and non-human primates, Pig-a in other mammalian species). PIG-A is involved in the synthe... | https://en.wikipedia.org/wiki/Pig-a_gene_mutation_assay |
Piggybacking on Internet access is the practice of establishing a wireless Internet connection by using another subscriber's wireless Internet access service without the subscriber's explicit permission or knowledge. It is a legally and ethically controversial practice, with laws that vary by jurisdiction around the wo... | https://en.wikipedia.org/wiki/Piggybacking_(Internet_access) |
In decision theory , a pignistic probability is a probability that a rational person will assign to an option when required to make a decision.
A person may have, at one level certain beliefs or a lack of knowledge, or uncertainty, about the options and their actual likelihoods. However, when it is necessary to make a... | https://en.wikipedia.org/wiki/Pignistic_probability |
A pile cap is a thick concrete mat that rests on concrete or timber piles that have been driven into soft or unstable ground to provide a suitable stable foundation. It usually forms part of the deep foundation of a building, typically a multi-story building, structure or support base for heavy equipment, or of a bridg... | https://en.wikipedia.org/wiki/Pile_cap |
A pile driver is a heavy-duty tool used to drive piles into soil to build piers, bridges, cofferdams , and other "pole" supported structures, and patterns of pilings as part of permanent deep foundations for buildings or other structures. Pilings may be made of wood, solid steel, or tubular steel (often later filled ... | https://en.wikipedia.org/wiki/Pile_driver |
Pileup format is a text-based format for summarizing the base calls of aligned reads to a reference sequence. This format facilitates visual display of SNP /indel calling and alignment. It was first used by
Tony Cox and Zemin Ning at the Wellcome Trust Sanger Institute , and became widely known through its implementati... | https://en.wikipedia.org/wiki/Pileup_format |
The pileus ( Ancient Greek : πῖλος , pîlos ; also pilleus or pilleum in Latin ) was a brimless felt cap worn in Ancient Greece , Etruria , Illyria (especially Pannonia ), [ 1 ] [ 2 ] [ 3 ] [ 4 ] later also introduced in Ancient Rome . [ 5 ] The pileus also appears on Apulian red-figure pottery .
The pilos together wit... | https://en.wikipedia.org/wiki/Pileus_(hat) |
In mycology (the branch of biology that includes the study of mushrooms and other fungi ), the pileus is the technical name for the cap, or cap-like part, of a basidiocarp or ascocarp ( fungal fruiting body ) that supports a spore-bearing surface, the hymenium. [ 1 ] The hymenium ( hymenophore ) may consist of lamellae... | https://en.wikipedia.org/wiki/Pileus_(mycology) |
Pilish is a style of constrained writing in which the lengths of consecutive words or sentences match the digits of the number π ( pi ). [ 1 ] [ 2 ] The shortest example is any three-letter word, such as "hat", but many longer examples have been constructed, including sentences, poems, and stories.
The following sente... | https://en.wikipedia.org/wiki/Pilish |
The Pill of Immortality , also known as xiandan (仙丹), jindan (金丹) or dan (丹) in general, was an elixir or pill sought by Chinese alchemists to confer physical or spiritual immortality. It is typically represented as a spherical pill of dark color and uniform texture, made of refined medical material. Colloquially and i... | https://en.wikipedia.org/wiki/Pill_of_Immortality |
Pillars of Creation is a photograph taken by the Hubble Space Telescope that depicts elephant trunks of interstellar gas and dust in the Eagle Nebula of the Serpens constellation, some 6,500–7,000 light-years (2,000–2,100 pc; 61–66 Em) from Earth. [ 1 ] These elephant trunks had been discovered by John Charles Duncan i... | https://en.wikipedia.org/wiki/Pillars_of_Creation |
Pillow-plate heat exchangers are a class of fully welded heat exchanger design, which exhibit a wavy, “pillow-shaped” surface formed by an inflation process. Compared to more conventional equipment, such as shell and tube and plate and frame heat exchangers , pillow plates are a quite young technology. Due to their geo... | https://en.wikipedia.org/wiki/Pillow-plate_heat_exchanger |
A pilot chute is a small auxiliary parachute used to deploy the main or reserve parachute. [ 1 ] The pilot chute is connected by a bridle to the deployment bag containing the parachute. Pilot chutes are a critical component of all modern skydiving and BASE jumping gear. Pilot chutes are also used as a component of spac... | https://en.wikipedia.org/wiki/Pilot_chute |
A pilot direction indicator or pilot's directional indicator ( PDI ) [ 1 ] is an aircraft instrument used by bombardiers to indicate heading changes to the pilot in order to direct them to the proper location to drop bombs . The PDI is used in aircraft where the pilot and bombardier are physically separated and cannot ... | https://en.wikipedia.org/wiki/Pilot_direction_indicator |
A pilot plant is a pre-commercial production system that employs new production technology and/or produces small volumes of new technology-based products, mainly for the purpose of learning about the new technology. The knowledge obtained is then used for design of full-scale production systems and commercial products,... | https://en.wikipedia.org/wiki/Pilot_plant |
A pilus ( Latin for 'hair'; pl. : pili ) is a hair-like cell-surface appendage found on many bacteria and archaea . [ 1 ] The terms pilus and fimbria (Latin for 'fringe'; plural: fimbriae ) can be used interchangeably, although some researchers reserve the term pilus for the appendage required for bacterial conjugation... | https://en.wikipedia.org/wiki/Pilus |
Pimascovirales is an order of viruses . [ 1 ] The term is a portmanteau of a portmanteau of pitho -, irido-, marseille-, and ascoviruses. [ 2 ]
Pimascovirales contains six families, three of which are assigned to a suborder. This taxonomy is shown hereafter: [ 1 ]
This virus -related article is a stub . You can help ... | https://en.wikipedia.org/wiki/Pimascovirales |
A pin insulator is a device that isolates a wire from a physical support such as a pin (a wooden or metal dowel of about 3 cm diameter with screw threads) on a telegraph or utility pole . It is a formed, single layer shape that is made out of a non-conducting material, usually porcelain or glass . It is thought to be t... | https://en.wikipedia.org/wiki/Pin_insulator |
The Pin matrix is a compact and visual to way to semi-permanently route signals or program devices, such as in early digital electronics [ 1 ] [ 2 ] or lighting control boards. [ 3 ] [ 4 ]
The number of patches that can be made is limited [ 5 ] and the proximity of signal wires in the matrix can cause crosstalk . [ 6 ... | https://en.wikipedia.org/wiki/Pin_matrix |
Pinatuzumab vedotin ( INN ; [ 1 ] development codes DCDT2980S and FCU2703 ) is a monoclonal antibody designed for the treatment of B-cell malignancies. [ 2 ]
This drug was developed by Genentech / Roche . [ citation needed ]
This monoclonal antibody –related article is a stub . You can help Wikipedia by expanding it ... | https://en.wikipedia.org/wiki/Pinatuzumab_vedotin |
Pinch analysis is a methodology for minimising energy consumption of chemical processes by calculating thermodynamically feasible energy targets (or minimum energy consumption) and achieving them by optimising heat recovery systems, energy supply methods and process operating conditions. It is also known as process int... | https://en.wikipedia.org/wiki/Pinch_analysis |
A pinch point or pinch point hazard is a common class of mechanical hazard where injury or damage may be done by one or more objects moving towards each other, crushing or shearing whatever comes between them. [ 1 ] A nip point is a type of pinch point involving rotating objects, such as gears and pulleys. [ 2 ] Injuri... | https://en.wikipedia.org/wiki/Pinch_point_hazard |
In mathematics , the Pincherle polynomials P n ( x ) are polynomials introduced by S. Pincherle ( 1891 ) given by the generating function
Humbert polynomials are a generalization of Pincherle polynomials
This polynomial -related article is a stub . You can help Wikipedia by expanding it . | https://en.wikipedia.org/wiki/Pincherle_polynomials |
Pinealon is a synthetic tripeptide of sequence (Glu-Asp-Arg) and purported geroprotector documented in the Russian scientific literature. [ 1 ] [ 2 ] [ 3 ] [ 4 ]
Pinealon has been shown to protect rat offspring from prenatal hyperhomocysteinemia and correspondingly improve post natal cognitive function. [ 5 ]
Pinealo... | https://en.wikipedia.org/wiki/Pinealon |
Ping-pong recording (also called ping-ponging , bouncing tracks , or reduction mixing ) is a method of sound recording . It involves combining multiple track stems into one, allowing more room for overdubbing when using tape recorders with a limited set of tracks. It is also used to simplify mixdowns .
The two most co... | https://en.wikipedia.org/wiki/Ping-pong_recording |
PingER , an acronym for Ping End-to-end Reporting, measures round-trip travel time of a packet of data between two nodes on the Internet. The PingER' Project uses a simple tool—the ping command —to get valuable insights into performance of the Internet backbone . [ 1 ]
High energy particle physicists began the proje... | https://en.wikipedia.org/wiki/PingER_Project |
A ping test is a physical test to determine the natural frequency of an object or assembly. [ 1 ] The test consists of instrumenting the object or assembly with measuring devices and then tapping it with another metallic object (usually a hammer.) The undamped system will then vibrate at its natural frequency. The pin... | https://en.wikipedia.org/wiki/Ping_test_(engineering) |
The pinhole camera model describes the mathematical relationship between the coordinates of a point in three-dimensional space and its projection onto the image plane of an ideal pinhole camera , where the camera aperture is described as a point and no lenses are used to focus light. The model does not include, for ex... | https://en.wikipedia.org/wiki/Pinhole_camera_model |
Pink Visual is an independent reality and gonzo pornography film production company, based in Van Nuys, California , United States. It began as an Internet pornography provider before eventually moving into DVD production. Pink Visual also licenses adult content to cable , satellite , pay-per-view , hotel chain channel... | https://en.wikipedia.org/wiki/Pink_Visual |
Pink flowers are used as a symbol of love and awareness. For decades, pink flowers have been used to decorate weddings as a symbol of love. [ 1 ] They can also be used as a display of love at funerals, as demonstrated at the funeral for Anna Nicole Smith . [ 2 ] [ 3 ]
More recently, pink flowers have come to symbolize... | https://en.wikipedia.org/wiki/Pink_flowers |
Trinitrotoluene ( / ˌ t r aɪ ˌ n aɪ t r oʊ ˈ t ɒ lj u iː n / ), [ 5 ] [ 6 ] more commonly known as TNT (and more specifically 2,4,6-trinitrotoluene , and by its preferred IUPAC name 2-methyl-1,3,5-trinitrobenzene ), [ 1 ] is a chemical compound with the formula C 6 H 2 (NO 2 ) 3 CH 3 . TNT is occasionally used as a re... | https://en.wikipedia.org/wiki/Pink_water |
The Pinkerton lecture series is held by the Institution of Engineering and Technology in commemoration and honour of John Pinkerton , the pivotal engineer who was involved with designing the UK's first business computer in 1951. The first lecture was held in 2000 and the event has taken place every year since then. | https://en.wikipedia.org/wiki/Pinkerton_Lecture |
The Pinner reaction refers to the acid catalysed reaction of a nitrile with an alcohol to form an imino ester salt ( alkyl imidate salt); this is sometimes referred to as a Pinner salt . [ 1 ] The reaction is named after Adolf Pinner , who first described it in 1877. [ 2 ] [ 3 ] [ 4 ] Pinner salts are themselves reacti... | https://en.wikipedia.org/wiki/Pinner_reaction |
The Pinner triazine synthesis describes the preparation of 2-hydroxyl-4,6-diaryl- s -triazines by reaction of aryl amidines and phosgene . This reaction may be extended to halogenated aliphatic amidines. [ 1 ] [ 2 ] [ 3 ]
This reaction was first reported by Adolf Pinner in 1890 [ 4 ] | https://en.wikipedia.org/wiki/Pinner_triazine_synthesis |
The Pinnick oxidation is an organic reaction by which aldehydes can be oxidized into their corresponding carboxylic acids using sodium chlorite (NaClO 2 ) under mild acidic conditions. It was originally developed by Lindgren and Nilsson. [ 1 ] The typical reaction conditions used today were developed by G. A. Kraus. [ ... | https://en.wikipedia.org/wiki/Pinnick_oxidation |
Pinning is a technique used when assembling large or heavy model kits (such as metal wargaming miniatures ) that involves drilling a hole in two pieces of the model to be joined, and using a "pin" to strengthen the bond when they are glued. Pinning is a useful technique for reinforcing joints and is essential when mak... | https://en.wikipedia.org/wiki/Pinning_(modelling) |
Pinning force is a force acting on a pinned object from a pinning center . In solid state physics , this most often refers to the vortex pinning, the pinning of the magnetic vortices ( magnetic flux quanta , Abrikosov vortices ) by different kinds of the defects in a type II superconductor . Important quantities are th... | https://en.wikipedia.org/wiki/Pinning_force |
In a crystalline material, a dislocation is capable of traveling throughout the lattice when relatively small stresses are applied. This movement of dislocations results in the material plastically deforming . Pinning points in the material act to halt a dislocation's movement, requiring a greater amount of force to be... | https://en.wikipedia.org/wiki/Pinning_points |
In cellular biology , pinocytosis , otherwise known as fluid endocytosis and bulk-phase pinocytosis , is a mode of endocytosis in which small molecules dissolved in extracellular fluid are brought into the cell through an invagination of the cell membrane , resulting in their containment within a small vesicle inside t... | https://en.wikipedia.org/wiki/Pinocytosis |
In information theory , Pinsker's inequality , named after its inventor Mark Semenovich Pinsker , is an inequality that bounds the total variation distance (or statistical distance) in terms of the Kullback–Leibler divergence .
The inequality is tight up to constant factors. [ 1 ]
Pinsker's inequality states that, if ... | https://en.wikipedia.org/wiki/Pinsker's_inequality |
Piobert's law applies to the reaction of solid propellant grains to generate hot gas. It is stated: "Burning takes place by parallel layers where the surface of the grain regresses, layer by layer, normal to the surface at every point." [ 1 ]
The law was devised by French general Guillaume Piobert (in French) in 1839 ... | https://en.wikipedia.org/wiki/Piobert's_law |
A pioneer ( / ˌ p aɪ . ə ˈ n ɪər / ) is a soldier employed to perform engineering and construction tasks. The term is in principle similar to sapper or combat engineer . Pioneers were originally part of the artillery branch of European armies. Subsequently, they formed part of the engineering branch, the logistic branc... | https://en.wikipedia.org/wiki/Pioneer_(military) |
Pioneer factors are transcription factors that can directly bind condensed chromatin . They can have positive and negative effects on transcription and are important in recruiting other transcription factors and histone modification enzymes as well as controlling DNA methylation . They were first discovered in 2002 a... | https://en.wikipedia.org/wiki/Pioneer_factor |
Pioneer species are resilient species that are the first to colonize barren environments , or to repopulate disrupted biodiverse steady-state ecosystems as part of ecological succession . Various kinds of events can create good conditions for pioneers, including disruption by natural disasters , such as wildfire , floo... | https://en.wikipedia.org/wiki/Pioneer_species |
Pioneers in Engineering ( PiE ) is a student-run organization that promotes the study of science, technology, engineering, and mathematics, collectively known as STEM fields . The organization was established in 2008 as a non-profit corporation by University of California, Berkeley student, Xiao-Yu Fu. The University p... | https://en.wikipedia.org/wiki/Pioneers_in_Engineering |
The Pioneers of Underwater Acoustics Medal is awarded by the Acoustical Society of America in recognition of "an outstanding contribution to the science of underwater acoustics , as evidenced by publication of research results in professional journals or by other accomplishments in the field". The award was named in ho... | https://en.wikipedia.org/wiki/Pioneers_of_Underwater_Acoustics_Medal |
Piophila is a genus of small flies which includes the species known as the cheese fly . Both Piophila species feed on carrion , including human corpses . [ 1 ] [ 2 ]
Piophila are small dark flies with unmarked wings. The setulae (fine hairs) on the thorax are confined to three distinct rows. [ 3 ]
There are two speci... | https://en.wikipedia.org/wiki/Piophila |
Piotr Piecuch (born January 21, 1960) is a Polish-born American physical chemist . He holds the title of university distinguished professor [ 1 ] [ 2 ] in the department of chemistry at Michigan State University , East Lansing, Michigan , United States . He supervises a group, [ 3 ] whose research focuses on theoretica... | https://en.wikipedia.org/wiki/Piotr_Piecuch |
Pips are small but easily countable items, such as the dots on dominoes and dice , or the symbols on a playing card that denote its suit and value.
In playing cards , pips are small symbols on the front side of the cards that determine the suit of the card and its rank. For example, a standard 52-card deck consists of... | https://en.wikipedia.org/wiki/Pip_(counting) |
A pipe-in-pipe system [ 1 ] is a form of plumbing where all water pipes are running inside another pipe. Its purpose is to ensure that any leaks in the innermost pipe will not leak into the building structure and can be detected, as well as make for easier change of any internal pipes with leakage without opening the w... | https://en.wikipedia.org/wiki/Pipe-in-pipe_system |
A pipe is a tubular section or hollow cylinder , usually but not necessarily of circular cross-section , used mainly to convey substances which can flow — liquids and gases ( fluids ), slurries , powders and masses of small solids. It can also be used for structural applications; a hollow pipe is far stiffer per unit w... | https://en.wikipedia.org/wiki/Pipe_(fluid_conveyance) |
Pipe cutting or pipe profiling is a mechanized industrial process that removes material from pipe or tubing to create a desired profile. Typical profiles include straight cuts, mitres, saddles and midsection holes. These complex cuts are usually required to allow a tight fit between two parts that are to be joined via ... | https://en.wikipedia.org/wiki/Pipe_Cutting |
Pipe bursting is a trenchless method of replacing buried pipelines (such as sewer, water, or natural gas pipes) without the need for a traditional construction trench . "Launching and receiving pits" replace the trench needed by conventional pipe-laying.
HDPE pipe is the common replacement pipe. [ 1 ] [ 2 ]
There are... | https://en.wikipedia.org/wiki/Pipe_bursting |
Pipe drift is a measure of the roundness or eccentricity of the inside wall of a pipe. "API drift" refers to primary specifications set forth in API Specification 5CT ( ISO 11960), "Specification for Casing and Tubing". "Alternate drift" refers to alternate drift specifications listed in API 5CT. "Special drift" ref... | https://en.wikipedia.org/wiki/Pipe_drift |
In fluid mechanics , pipe flow is a type of fluid flow within a closed conduit , such as a pipe , duct or tube . It is also called as Internal flow . [ 1 ] The other type of flow within a conduit is open channel flow . These two types of flow are similar in many ways, but differ in one important aspect. Pipe flow does ... | https://en.wikipedia.org/wiki/Pipe_flow |
In the process industry , chemical industry , manufacturing industry , and other commercial and industrial contexts, pipe marking is used to identify the contents, properties and flow direction of fluids in piping. It is typically carried out by marking piping through labels and color codes. Pipe marking helps personne... | https://en.wikipedia.org/wiki/Pipe_marking |
In fluid dynamics , pipe network analysis is the analysis of the fluid flow through a hydraulics network, containing several or many interconnected branches. The aim is to determine the flow rates and pressure drops in the individual sections of the network. This is a common problem in hydraulic design.
To direct wate... | https://en.wikipedia.org/wiki/Pipe_network_analysis |
Structural steel pipe racks typically support pipes , power cables and instrument cable trays in petrochemical , chemical and power plants . Occasionally, pipe racks may also support mechanical equipment, vessels and valve access platforms. Main pipe racks generally transfer material between equipment and storage or ut... | https://en.wikipedia.org/wiki/Pipe_rack |
A pipe wrench is any of several types of wrench that are designed to turn threaded pipe and pipe fittings for assembly (tightening) or disassembly (loosening). The Stillson wrench , or Stillson-pattern wrench , is the usual form of pipe wrench, especially in the US. The Stillson name is that of the original patent hold... | https://en.wikipedia.org/wiki/Pipe_wrench |
Pipecolic acid (piperidine-2-carboxylic acid) is an organic compound with the formula HNC 5 H 9 CO 2 H. It is a carboxylic acid derivative of piperidine and, as such, an amino acid , although not one encoded genetically. Like many other α - amino acids , pipecolic acid is chiral, although the S-stereoisomer is more com... | https://en.wikipedia.org/wiki/Pipecolic_acid |
A pipefitter or steamfitter [ 1 ] is a tradesman who installs, assembles, fabricates, maintains, and repairs mechanical piping systems. Pipefitters usually begin as helpers or apprentices. Journeyman pipefitters deal with industrial/commercial/marine piping and heating/cooling systems. Typical industrial process pipe i... | https://en.wikipedia.org/wiki/Pipefitter |
In hydrology , pipeflow is a type of subterranean water flow where water travels along cracks in the soil or old root systems found in above ground vegetation .
In such soils which have a high vegetation content water is able to travel along the 'pipes', allowing water to travel faster than throughflow . Here, water ... | https://en.wikipedia.org/wiki/Pipeflow |
A pipelayer or sideboom [ citation needed ] is a type of a construction vehicle used to lay pipes. It is used in the construction of oil, gas and water pipelines .
The lifting equipment of pipelayers includes:
A pipelayer can also be equipped with accessories:
Construction, installation, operation, inspection, testi... | https://en.wikipedia.org/wiki/Pipelayer_(vehicle) |
A pipeline is a system of pipes for long-distance transportation of a liquid or gas, typically to a market area for consumption. The latest data from 2014 gives a total of slightly less than 2,175,000 miles (3,500,000 km) of pipeline in 120 countries around the world. [ 1 ] The United States had 65%, Russia had 8%, and... | https://en.wikipedia.org/wiki/Pipeline |
Pipeline Pilot is a desktop software application developed by Dassault Systèmes , focused on extract, transform, and load (ETL) processes and data analytics. Since its inception, the software has evolved to offer broader capabilities in various scientific and industrial applications.
Pipeline Pilot uses a visual and d... | https://en.wikipedia.org/wiki/Pipeline_Pilot |
Pipeline video inspection is a form of telepresence used to visually inspect the interiors of pipelines , plumbing systems, and storm drains . A common application is for a plumber to determine the condition of small diameter sewer lines and household connection drain pipes.
Older sewer lines of small diameter, typica... | https://en.wikipedia.org/wiki/Pipeline_video_inspection |
CORDIC ( coordinate rotation digital computer ), Volder's algorithm , Digit-by-digit method , Circular CORDIC ( Jack E. Volder ), [ 1 ] [ 2 ] Linear CORDIC , Hyperbolic CORDIC (John Stephen Walther), [ 3 ] [ 4 ] and Generalized Hyperbolic CORDIC ( GH CORDIC ) (Yuanyong Luo et al.), [ 5 ] [ 6 ] is a simple and efficient... | https://en.wikipedia.org/wiki/Pipelined_CORDIC |
A Piper diagram is a graphic procedure proposed by Arthur M. Piper in 1944 for presenting water chemistry data to help in understanding the sources of the dissolved constituent salts in water. This procedure is based on the premise that cations and anions in water are in such amounts to assure the electroneutrality of ... | https://en.wikipedia.org/wiki/Piper_diagram |
Piperacillin is a broad-spectrum β-lactam antibiotic of the ureidopenicillin class. [ 1 ] The chemical structure of piperacillin and other ureidopenicillins incorporates a polar side chain that enhances penetration into Gram-negative bacteria and reduces susceptibility to cleavage by Gram-negative beta lactamase enzyme... | https://en.wikipedia.org/wiki/Piperacillin |
A pipette (sometimes spelled as pipet ) is a type of laboratory tool commonly used in chemistry and biology to transport a measured volume of liquid, often as a media dispenser . Pipettes come in several designs for various purposes with differing levels of accuracy and precision , from single piece glass pipettes to ... | https://en.wikipedia.org/wiki/Pipette |
Piphilology comprises the creation and use of mnemonic techniques to remember many digits of the mathematical constant π . The word is a play on the word "pi" itself and of the linguistic field of philology .
There are many ways to memorize π , including the use of piems (a portmanteau , formed by combining pi and po ... | https://en.wikipedia.org/wiki/Piphilology |
Within industry, piping is a system of pipes used to convey fluids ( liquids and gases ) from one location to another. The engineering discipline of piping design studies the efficient transport of fluid. [ 1 ] [ 2 ]
Industrial process piping (and accompanying in-line components) can be manufactured from wood , fiberg... | https://en.wikipedia.org/wiki/Piping |
A Piping and Instrumentation Diagram ( P&ID ) is a detailed diagram in the process industry which shows process equipment together with the instrumentation and control devices. It is also called as mechanical flow diagram (MFD). [ 1 ]
Superordinate to the P&ID is the process flow diagram (PFD) which indicates the more... | https://en.wikipedia.org/wiki/Piping_and_instrumentation_diagram |
A fitting or adapter is used in pipe systems to connect sections of pipe (designated by nominal size , with greater tolerances of variance) or tube (designated by actual size, with lower tolerance for variance), adapt to different sizes or shapes, and for other purposes such as regulating (or measuring) fluid flow. [ ... | https://en.wikipedia.org/wiki/Piping_and_plumbing_fitting |
Piping corrosion circuit or Corrosion loop / Piping Circuitization and Corrosion Modelling, is carried out as part of either a Risk Based Inspection analysis (RBI) or Materials Operating Envelope analysis (MOE). It is the systematization of the piping components versus failure modes analysis into materials operating en... | https://en.wikipedia.org/wiki/Piping_corrosion_circuit |
The Pirelli Internetional Award was an international multimedia competition for the communication of science & technology conducted entirely on the internet , which was awarded from 1997 to 2007. Awards were granted to the best multimedia presentations focussing on themes involving the diffusion of science and technolo... | https://en.wikipedia.org/wiki/Pirelli_Internetional_Award |
Pirepemat ( INN Tooltip International Nonproprietary Name ; developmental code name IRL752 or IRL-752 ) is a drug which is under development for the prevention of falls in people with Parkinson's disease and Parkinson's disease dementia . [ 2 ] [ 3 ] [ 4 ] [ 5 ] [ 1 ] [ 6 ] It has been referred to as a " nootrope " (i.... | https://en.wikipedia.org/wiki/Pirepemat |
Pirkle's alcohol is an off-white, crystalline solid that is stable at room temperature when protected from light and oxygen. This chiral molecule is typically used, in nonracemic form, as a chiral shift reagent in nuclear magnetic resonance spectroscopy , in order to simultaneously determine absolute configuration and ... | https://en.wikipedia.org/wiki/Pirkle's_alcohol |
A pirn is a rod onto which weft thread is wound for use in weaving . [ 1 ] [ 2 ] Unlike a bobbin , it is fixed in place, and the thread is delivered off the end of the pirn rather than from the centre. A typical pirn is made of wood or plastic and is slightly tapered for most of its length, flaring out more sharply at ... | https://en.wikipedia.org/wiki/Pirn |
Pisces V is a type of crewed submersible ocean exploration device, powered by battery, and capable of operating to depths of 2,000 metres (6,600 ft), a depth that is optimum for use in the sea waters around the Hawaiian Islands . It is used by scientists to explore the deep sea around the underwater banks in the main ... | https://en.wikipedia.org/wiki/Pisces_V |
In mathematics , Pisier–Ringrose inequality is an inequality in the theory of C*-algebras which was proved by Gilles Pisier in 1978 affirming a conjecture of John Ringrose . It is an extension of the Grothendieck inequality .
Theorem . [ 1 ] [ 2 ] If γ {\displaystyle \gamma } is a bounded, linear mapping of one C*-alg... | https://en.wikipedia.org/wiki/Pisier–Ringrose_inequality |
Pisoniviricetes is a class of positive-strand RNA viruses which infect eukaryotes . [ 1 ] [ 2 ] A characteristic of the group is a conserved 3C - like protease from the PA clan of proteases for processing the translated polyprotein . [ 3 ] [ 4 ] [ 5 ] The name of the group is a portmanteau of member orders " pi cornavi... | https://en.wikipedia.org/wiki/Pisoniviricetes |
On a firearm or other tools , a pistol grip is a distinctly protruded handle underneath the main mechanism, to be held by the user's hand at a more vertical (and thus more ergonomic) angle, similar to how one would hold a conventional pistol . [ 1 ]
In firearms, the pistol grip is located behind the trigger and genera... | https://en.wikipedia.org/wiki/Pistol_grip |
Piston effect refers to the forced-air flow inside a tunnel or shaft caused by moving vehicles. [ 1 ] It is one of numerous phenomena that engineers and designers must consider when developing a range of structures.
In open air, when a vehicle travels along, air pushed aside can move in any direction except into the g... | https://en.wikipedia.org/wiki/Piston_effect |
The reciprocating motion of a non-offset piston connected to a rotating crank through a connecting rod (as would be found in internal combustion engines ) can be expressed by equations of motion . This article shows how these equations of motion can be derived using calculus as functions of angle ( angle domain ) and o... | https://en.wikipedia.org/wiki/Piston_motion_equations |
Pisuviricota is a phylum of RNA viruses that includes all positive-strand and double-stranded RNA viruses that infect eukaryotes and are not members of the phylum Kitrinoviricota , Lenarviricota or Duplornaviricota . [ 1 ] The name of the group is a syllabic abbreviation of “ pi cornavirus su pergroup” with the suffix ... | https://en.wikipedia.org/wiki/Pisuviricota |
Pits are relatively thinner portions of the cell wall that adjacent cells can communicate or exchange fluid through. Pits are characteristic of cell walls with secondary layers . Generally each pit has a complementary pit opposite of it in the neighboring cell. These complementary pits are called "pit pairs". [ 1 ]
Pi... | https://en.wikipedia.org/wiki/Pit_(botany) |
The pit sword (also known as a rodmeter) is a blade of metal or plastic that extends into the water beneath the hull of a ship . [ 1 ] It is part of the pitometer log , a device for measuring the ship's speed through the water. | https://en.wikipedia.org/wiki/Pit_sword |
Pit water , mine water or mining water is water that collects in a mine and which has to be brought to the surface by water management methods in order to enable the mine to continue working.
Although all water that enters pit workings originates from atmospheric precipitation , the miner distinguishes between surface... | https://en.wikipedia.org/wiki/Pit_water |
PitchCom is a wireless communication system used in baseball that lets a player request pitches without using visible signals . Major League Baseball (MLB) approved the use of PitchCom before the start of the 2022 season with the intentions of deterring sign stealing and quickening the pace of play . [ 1 ]
Catchers tr... | https://en.wikipedia.org/wiki/PitchCom |
Pitch is a viscoelastic polymer which can be natural or manufactured, derived from petroleum , coal tar , [ 1 ] or plants. Pitch produced from petroleum may be called bitumen or asphalt , while plant-derived pitch, a resin , is known as rosin in its solid form. Tar is sometimes used interchangeably with pitch, but gene... | https://en.wikipedia.org/wiki/Pitch_(resin) |
A variable speed pitch control (or vari-speed ) is a control on an audio device such as a turntable , tape recorder , or CD player that allows the operator to deviate from a standard speed (such as 33, 45 or even 78 rpm on a turntable), resulting in adjustments in pitch. [ 1 ] The latter term "vari-speed" is more commo... | https://en.wikipedia.org/wiki/Pitch_control |
Pitch correction is an electronic effects unit or audio software that changes the intonation (highness or lowness in pitch) of an audio signal so that all pitches will be notes from the equally tempered system (i.e., like the pitches on a piano ). Pitch correction devices do this without affecting other aspects of its ... | https://en.wikipedia.org/wiki/Pitch_correction |
Pitch drop-back is the phenomena by which an aircraft which is perturbed in flight path angle from its trim position by a step input exhibits an output which is indicative of a second order system. [ 1 ]
A pilot who actuates an elevator input may find that the aircraft then "droops" or "drops back" to a position furth... | https://en.wikipedia.org/wiki/Pitch_drop-back |
A pitch drop experiment is a long-term experiment which measures the flow of a piece of pitch over many years. "Pitch" is the name for any of a number of highly viscous liquids which appear solid, most commonly bitumen , also known as asphalt. At room temperature, tar pitch flows at a very low rate, taking several year... | https://en.wikipedia.org/wiki/Pitch_drop_experiment |
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