major industrial polymers: Polyurethane elastomers: This technology, known as reaction injection molding, accounts for much of the production of thermosetting elastomers made from polyurethane. Polyurethane elastomers are made into automobile parts, industrial rollers, flexible molds, forklift tires, roller-skate and skateboard wheels, medical equipment, and shoe soles.

chemical intermediate, any chemical substance produced during the conversion of some reactant to a product. Most synthetic processes involve transformation of some readily available and often inexpensive substance to some desired product through a succession of steps. All the substances generated

reaction mechanism, in chemical reactions, the detailed processes by which chemical substances are transformed into other substances. The reactions themselves may involve the interactions of atoms, molecules, ions, electrons, and free radicals, and they may take place in gases, liquids, or

reaction mechanism: Kinetic order: Because the possibilities that need to be considered for the transition state have been limited by determination of the chemical structures of the participants, the most powerful method of obtaining further information is the use of the kinetic method—i.e., the study of the…

reaction rate, in chemistry, the speed at which a chemical reaction proceeds. It is often expressed in terms of either the concentration (amount per unit volume) of a product that is formed in a unit of time or the concentration of a reactant that is consumed in a unit of time. Alternatively, it

mineral: Mineral associations and phase equilibrium: …presence (or absence) of a reaction rim, which is a region separating two or more minerals and consisting of the products of a reaction between them. The absence of any observable reaction rims between minerals that physically touch each other suggests that they were in equilibrium at the time when…

advanced ceramics: Reaction sintering: Reaction sintering, or reaction bonding, is an important means of producing dense covalent ceramics. Reaction-bonded silicon nitride (RBSN) is made from finely divided silicon powders that are formed to shape and subsequently reacted in a mixed nitrogen/hydrogen or nitrogen/helium atmosphere at 1,200 to…

turbine: Turbine staging: Reaction staging is similar to pressure staging, except that a greater number of reaction stages are required. The first turbine stage, however, is often an impulse stage for controlling the steam flow and for rapidly reducing the pressure in stationary nozzles from its high steam…

igneous rock: Important textural types: Reaction textures occur at the corroded margins of crystals, from the corrosive rimming of crystals of one mineral by finer-grained aggregates of another, or as a result of other features that indicate partial removal of crystalline material by reaction with magma or other fluid.

human behaviour: Central nervous system processing: For example, reaction time tests (which measure the time elapsing between the appearance of a signal and the beginning of a responding movement) are usually viewed as a measure of central nervous system processing. Mean speed of response on such tasks increases with age until the late…

vitamin: Animal assay: In a reaction time assay, an animal is first deprived of a vitamin until a specific deficiency symptom appears; then the animal is given a known amount of a food extract containing the vitamin, and the deficiency symptom disappears within a day or two. The time required…

turbine: Reaction turbines: In a reaction turbine, forces driving the rotor are achieved by the reaction of an accelerating water flow in the runner while the pressure drops. The reaction principle can be observed in a rotary lawn sprinkler where the emerging jet drives the rotor…

tree: Wood adaptations: In branches, reaction tissue forms where its inherent reaction force (pushing in the case of conifers and pulling in the case of hardwoods) will restore the intrinsic growth direction (equilibrium, or initial, position). This defines the locus of reaction tissue irrespective of the orientation of the structure…

heat of reaction: …pressure is also designated the enthalpy of reaction, represented by the symbol ΔH. If the heat of reaction is positive, the reaction is said to be endothermic; if negative, exothermic.

heat of reaction, the amount of heat that must be added or removed during a chemical reaction in order to keep all of the substances present at the same temperature. If the pressure in the vessel containing the reacting system is kept at a constant value, the measured heat of reaction also

mechanics: Centre of mass: …the orbit, but, according to Newton’s third law, it must actually be accelerated by a force due to Earth that is equal and opposite to the force that the Sun exerts on Earth. In other words, considering only the Sun and Earth (ignoring, for example, all the other planets), if…

advanced ceramics: Reaction sintering: Reaction-bonded silicon carbide (RBSC) is produced from a finely divided, intimate mixture of silicon carbide and carbon. Pieces formed from this mixture are exposed to liquid or vapour silicon at high temperature. The silicon reacts with the carbon to form additional silicon carbide, which bonds…

advanced ceramics: Reaction sintering: Reaction-bonded silicon nitride (RBSN) is made from finely divided silicon powders that are formed to shape and subsequently reacted in a mixed nitrogen/hydrogen or nitrogen/helium atmosphere at 1,200 to 1,250 °C (2,200 to 2,300 °F). The nitrogen permeates the porous body and reacts with the…

reaction rate: The rate constant, or the specific rate constant, is the proportionality constant in the equation that expresses the relationship between the rate of a chemical reaction and the concentrations of the reacting substances. The measurement and interpretation of reactions constitute the branch of chemistry known as…

social movement: Types of social movements: A reactionary movement advocates the restoration of a previous state of social affairs, while a progressive movement argues for a new social arrangement. A conservative movement opposes the changes proposed by other movements, or those seeming to develop through cultural drift, and advocates preservation of existing…

chemical kinetics: Composite reaction mechanisms: …of reactions is called a cycle of reactions, and it can occur a number of times, in which case the reaction is referred to as a chain reaction. The two reactions in which bromine is regenerated are known as the chain-propagating steps. The average number of times the pair of…

armoured vehicle: Fully tracked carriers: …with metal cages and with reactive armour that exploded outward to provide better protection against improvised explosive devices and rocket-propelled grenades.

reactive arthritis, disorder characterized primarily by joint pain that also sometimes affects the eyes, urogenital tract, and skin on the palms of the hands and soles of the feet. The cause of reactive arthritis is unclear, but symptoms typically are triggered by a sexually transmitted disease or

reactive arthritis, disorder characterized primarily by joint pain that also sometimes affects the eyes, urogenital tract, and skin on the palms of the hands and soles of the feet. The cause of reactive arthritis is unclear, but symptoms typically are triggered by a sexually transmitted disease or

reactive attachment disorder, rare condition in which infants and young children fail to form emotional bonds with their parents or other caregivers. The disorder is associated with trauma or other stressors that typically result from neglect or physical or emotional abuse and that affect early

reactive dye, any of a class of highly coloured organic substances, primarily used for tinting textiles, that attach themselves to their substrates by a chemical reaction that forms a covalent bond between the molecule of dye and that of the fibre. The dyestuff thus becomes a part of the fibre and

poison: Carcinogenesis: They are either direct-acting or indirect-acting chemicals.

integrated circuit: Etching: …with strong chemicals or by reactive ion etching (RIE). RIE is like sputtering in the argon chamber, but the polarity is reversed and different gas mixtures are used. The atoms on the surface of the wafer fly away, leaving it bare.

aging: Oxidative damage theory: …particular with molecules known as reactive oxygen species (ROS). This theory was first proposed in the 1950s by American gerontologist Denham Harman and was supported in part by evidence that antioxidant proteins, which neutralize free radicals, are more abundant in aging cells, indicating a response to oxidative stress.

economic integration: Reactive regionalism: Reactive regionalism is also referred to as defensive regionalism, suggesting that states choose to pursue economic integration to protect their shared interests from a specific or nebulous external threat. In a historical context, reactive regionalism was viewed by developing countries as a technique…

industrial glass: From the gaseous state: In another process, known as reactive vapour-phase glassmaking, the desired glass is formed by a chemical reaction. Chemical vapour deposition, or CVD, belongs to this latter category, with a good example being the making of silica glass by hydroxylation. In the hydroxylation technique, vapours of silicon tetrachloride (SiCl4) are reacted…

hazardous-waste management: Hazardous-waste characteristics: Reactive wastes are chemically unstable and react violently with air or water. They cause explosions or form toxic vapours. Ignitable wastes burn at relatively low temperatures and may cause an immediate fire hazard. Corrosive wastes include strong acidic or alkaline substances. They destroy solid material…

advanced ceramics: Solid-state sintering: In reactive-liquid, or transient-liquid, sintering, a chemical additive produces a temporary liquid that facilitates the initial stages of sintering. The liquid is subsequently evaporated, resorbed by the solid particles, or crystallized into a solid.

nuclear reactor: Reactor control: …in the nuclear industry is reactivity, which is a measure of the state of a reactor in relation to where it would be if it were in a critical state. Reactivity is positive when a reactor is supercritical, zero at criticality, and negative when the reactor is subcritical. Reactivity may…

heterocyclic compound: The nature of heteroaromaticity: Chemical reactivity can provide a certain qualitative insight into aromaticity. The reactivity of an aromatic compound is affected by the extra stability of the conjugated system that it contains; the extra stability in turn determines the tendency of the compound to react by substitution of…

heterocyclic compound: The nature of heteroaromaticity: Chemical reactivity can provide a certain qualitative insight into aromaticity. The reactivity of an aromatic compound is affected by the extra stability of the conjugated system that it contains; the extra stability in turn determines the tendency of the compound to react by substitution of…

propaganda: Media of propaganda: …messages to other sets of reactors.

nuclear reactor, any of a class of devices that can initiate and control a self-sustaining series of nuclear fissions. Nuclear reactors are used as research tools, as systems for producing radioactive isotopes, and most prominently as energy sources for nuclear power plants. Nuclear reactors

reactor, in chemical engineering, device or vessel within which chemical processes are carried out for experimental or manufacturing purposes. Reactors range in size and complexity from small, open kettles fitted with simple stirrers and heaters to large, elaborate vessels equipped with jackets or

nuclear reactor: Core: All reactors have a core, a central region that contains the fuel, fuel cladding, coolant, and (where separate from the latter) moderator. The fission energy in a nuclear reactor is produced in the core.

nuclear reactor: The Reactor Safety Study of 1972–75: …1975 of a report titled Reactor Safety Study, also known as WASH-1400. The most useful aspect of the study was its delineation of components and accident sequences (scenarios) that were determined to be the most significant contributors to severe accidents.

gasoline engine: Exhaust system: The reactor system for controlling emissions is often composed of a belt-driven air compressor connected to small nozzles installed in the exhaust manifold facing the outlet from each exhaust valve. A small jet of air is thus directed toward the red-hot outflowing combustion products to provide…

nuclear reactor: Structural components: …power plant is usually the reactor vessel. In both the light-water reactor and the high-temperature gas-controlled reactor (HTGR), a reactor pressure vessel (RPV) is utilized so that the coolant is contained and operated under conditions appropriate for power generation—namely, elevated temperature and pressure. Within the reactor vessel are a number…

A prospectus is a document that is legally required for every publicly traded stock, mutual fund, and exchange-traded fund (ETF). It lays out basic financial information, as well as the mission of the company or the fund. Public companies must include a prospectus as part of their initial (or

Jacques Audiard: Sur mes lèvres (Read My Lips, 2001) centers on the relationship between a deaf, lip-reading secretary (Emanuelle Devos) and an ex-convict (Vincent Cassel), each of whom relies on the other’s abilities.

Reba McEntire: Acting and later music: …McEntire recorded the hit album Read My Mind; published a best-selling autobiography, Reba: My Story; appeared in the films North and The Little Rascals; and won both a Grammy Award and a CMA Award for her collaboration with Linda Davis on “Does He Love You.” She starred in a number…

The quarterly earnings conference call is a long-running practice for most U.S.-based, publicly traded companies. Typically held soon after a company releases quarterly earnings results, the calls provide a platform for CEOs to explain their numbers and assess the business landscape—and for Wall

Benjamin Franklin: Youthful adventures: …the Read family, where stood Deborah, his future wife. She saw him and “thought I made, as I certainly did, a most awkward ridiculous Appearance.”

Herbert Harold Read was a geologist known for his research on the origins of granite. A member of His Majesty’s Geological Survey from 1914 until 1931, when he became George Herdman professor of geology at the University of Liverpool, Read in 1939 moved to the Imperial College of Science and

Mary Read was an English pirate of the early 18th century who, with her crewmate Anne Bonny, became legendary as one of the few female pirates. Read’s early life is largely unknown. Much of the information is derived from Capt. Charles Johnson’s A General History of the Robberies and Murders of the

Mary Read was an English pirate of the early 18th century who, with her crewmate Anne Bonny, became legendary as one of the few female pirates. Read’s early life is largely unknown. Much of the information is derived from Capt. Charles Johnson’s A General History of the Robberies and Murders of the

Nathan Read was an American engineer and inventor. Read attended and taught at Harvard University, and soon thereafter he invented technology to adapt James Watt’s steam engine to boats and road vehicles. He devised a chain-wheel method of using paddle wheels to propel a steamboat, and in 1791 he

Opie Read was an American journalist, humorist, novelist, and lecturer. Read specialized in the homespun humour of life in Kentucky, Tennessee, and Arkansas; Southern colonels, blacks, and drunken printers are frequently found in his writing. Inspired by Benjamin Franklin’s autobiography, Read

Sir Herbert Read was a poet and critic who was the chief British advocate and interpreter of modern art movements from the 1930s to the ’60s. His critical scrutiny embraced society, art, and literature from the point of view of a philosophic anarchist. Read grew up on a farm, and he described his

Sir Herbert Read was a poet and critic who was the chief British advocate and interpreter of modern art movements from the 1930s to the ’60s. His critical scrutiny embraced society, art, and literature from the point of view of a philosophic anarchist. Read grew up on a farm, and he described his

Sir Charles Frank: …1950 Frank and American physicist Thornton Read simultaneously discovered what came to be known as the Frank-Read mechanism for generating dislocations in a crystal.

computer memory: Semiconductor memory: Some nonvolatile memories, such as read-only memory (ROM), are not rewritable once manufactured or written. Each memory cell of a ROM chip has either a transistor for a 1 bit or none for a 0 bit. ROMs are used for programs that are essential parts of a computer’s operation, such…

Charles Reade was an English author whose novels attack, with passionate indignation and laborious research, the social injustices of his times. He is also remembered for his historical novel The Cloister and the Hearth (1861), which relates the adventures of the father of Desiderius Erasmus as he

technology of photography: Microfilming and microreproduction: Readers and reader printers are desk-top projectors that display the frames reenlarged to about natural size on a back projection screen. In a reader printer the image may also be projected on sensitized paper for full-size enlargements. Advanced readers have elaborate retrieval systems based on…

lector, in Christianity, a person chosen or set apart to read Holy Scripture in the church services. In the Eastern Orthodox churches lector is one of the minor orders in preparation for the priesthood. Although formerly a minor order in the Roman Catholic Church, the office was named a ministry by

technology of photography: Microfilming and microreproduction: Readers and reader printers are desk-top projectors that display the frames reenlarged to about natural size on a back projection screen. In a reader printer the image may also be projected on sensitized paper for full-size enlargements. Advanced readers have elaborate retrieval systems based on frame coding…

Reader’s Digest, U.S.-based monthly magazine, having probably the largest circulation of any periodical in the world. It was first published in 1922 as a digest of condensed articles of topical interest and entertainment value taken from other periodicals. Founded on a low budget by DeWitt Wallace

history of publishing: Reader’s Digest magazine: …and a liberal slant, was Reader’s Scope (1943–48). The most successful book digest was probably Omnibook (1938–57), each issue of which contained abridgments of several popular works of fiction and nonfiction. The digests originally carried no advertising, but after World War II they were gradually driven to it by rising…

dramatic literature: The range of dramatic forms and styles: …dramatic writing is the so-called readers’ theatre, in which actors read or recite without decor before an audience. (This is not to be confused with “closet drama,” often a dramatic poem that assumes dialogue form; e.g., Milton’s Samson Agonistes, 1671, written without the intention of stage performance.) The essential discipline…

Stephen Daldry: …to the big screen with The Reader (2008), which was adapted by Hare from German author Bernhard Schlink’s novel. The film peers at the spectre of the Holocaust in post-World War II Germany through the lens of an affair between an illiterate woman (played by Kate Winslet) and a teenage…

Stanley Fish: …literary critic particularly associated with reader-response criticism, according to which the meaning of a text is created, rather than discovered, by the reader; with neopragmatism, where critical practice is advanced over theory; and with the interpretive relationships between literature and law.

readerly and writerly, opposite types of literary text, as defined by the French critic Roland Barthes in his book S/Z (1970). Barthes used the terms lisible (“readerly”) and scriptible (“writerly”) to distinguish, respectively, between texts that are straightforward and demand no special effort to

computer science: Parallel and distributed computing: The reader and writer must be synchronized so that the writer does not overwrite existing data until the reader has processed it. Similarly, the reader should not start to read until data has been written in the area.

pedagogy: Foreknowledge about students and objectives: …the idea of the student’s readiness at various ages to grasp concepts of concrete and formal thought. Numerous agencies produce test material for those purposes, and in many countries the idea has been widely applied to selection for entry to secondary and higher schools; one of the purposes of so-called…

Reading, town and unitary authority, geographic and historic county of Berkshire, southern England, 38 miles (61 km) west of London. It is an important junction of railways running west from London and south from the Midlands, and the Kennet and Avon Canal (to Bath and Bristol) and the River Thames

Berthe Morisot: , Reading, 1873; and The Artist’s Sister Edma and Their Mother, 1870). Delicate and subtle, exquisite in color—often with a subdued emerald glow—they won her the admiration of her Impressionist colleagues. Like that of the other Impressionists, her work was ridiculed by many critics. Never commercially…

Reading, city, seat (1752) of Berks county, southeastern Pennsylvania, U.S., on the Schuylkill River, 51 miles (82 km) northwest of Philadelphia. Laid out in 1748 by Nicholas Scull and William Parsons on land owned by Thomas and Richard Penn (sons of William Penn, Pennsylvania’s founder), it was

dyslexia: Primary symptoms include extremely poor reading skills owing to no apparent cause, a tendency to read and write words and letters in reversed sequences, similar reversals of words and letters in the person’s speech, and illegible handwriting.

Louis Althusser: Marx (1818–83), For Marx and Reading Capital (both published in 1965), Althusser sought to counter the prevalent interpretation of Marxism as an essentially “humanistic” and “individualist” philosophy in which history is a goal-directed process aimed at the realization and fulfillment of human nature under communism. Althusser asserted that this “Hegelian”…

cockfighting chair, chair with broad armrests that form a yoke with the back rail, to which a reading desk is attached. Broad in front but curving inward toward the back, the seat was shaped so that a reader could easily sit astride, facing the desk at the back of the chair and resting his arms on

Reading Company, American railroad in Pennsylvania, New York, and Delaware, absorbed into the Consolidated Rail Corporation (Conrail) in 1976. At its peak in the first half of the 20th century, it was the largest American carrier of anthracite coal. It began as the Philadelphia and Reading Railroad

Evelyn Wood: …her system, which she called Reading Dynamics, was the use of the hand as a pacer as the eyes followed its rapid zigzag motion down each page. In 1959 she opened the first Evelyn Wood Reading Dynamics Institute, in Washington, D.C. It was followed by many more such learning centres.…

heredity: Mechanisms of mutation: …termination codon is called the reading frame. If a nucleotide pair is added to or subtracted from this sequence, the reading frame from that point will be shifted by one nucleotide pair, and all of the codons downstream will be altered. The result will be a protein whose first section…

Reading Lolita in Tehran: A Memoir in Books, memoir by Iranian-American writer Azar Nafisi. Published in 2003, it is an account of her life teaching literature in Iran between 1979 and 1997. Born in Tehrān and educated in England, Switzerland, and the United States, Nafisi returned to Iran, where

LeVar Burton: Reading Rainbow and Star Trek: The Next Generation: …of the new PBS show Reading Rainbow. Each episode featured a children’s book read by a narrator, who over the years included such celebrities as actor James Earl Jones and singer Lou Rawls. Then Burton explored the theme of the book through interviews and visits to different locations. At the…

canon: …icumen in (also called the Reading Rota; “rota” was a medieval term for round). This unique six-part composition is based on a four-voice canon that can be derived from a single notated part according to verbal instructions, or canones (“rules”). Two canonic supporting voices forming a ground bass (repeated bass…

Rufus Daniel Isaacs, 1st marquess of Reading was a politician, lord chief justice of England, and diplomat. Called to the bar in 1887, Isaacs built a prosperous practice, representing trade unions as well as large corporations. In 1904 he was elected to the House of Commons as a Liberal. Appointed

Rufus Daniel Isaacs, 1st marquess of Reading was a politician, lord chief justice of England, and diplomat. Called to the bar in 1887, Isaacs built a prosperous practice, representing trade unions as well as large corporations. In 1904 he was elected to the House of Commons as a Liberal. Appointed

William Mahone: …the Confederacy who led Virginia’s “Readjuster” reform movement from 1879 to 1882.

Christianity: The readjustment: The goal of the mystic is not simply a transient ecstasy; it is a permanent state of being in which the person’s nature is transformed or deified. This state is frequently spoken of as a spiritual marriage involving God and the soul. This unitive…

Chelsea Manning: …2022 she released the memoir README.txt.

English literature: Milton: …the republic with his tract The Ready and Easy Way to Establish a Free Commonwealth (1660), a courageous but desperate program for a permanent oligarchy of the Puritan elect, the only device he could suggest to prevent the return to royal slavery.

metaverse: …sequels and Ernest Cline’s novel Ready Player One (2011; film 2018).

Steven Spielberg: The 2010s and beyond: …after a 13-year absence with Ready Player One (2018). The film takes place in a dystopian 2045 when the inhabitants of a declining Earth find refuge in the exciting virtual world of OASIS. It follows Wade Watts, a 1980s-loving teen, as his avatar competes with other users to find the…

Ready Steady Go! and Top of the Pops: The beat group boom that reinvigorated British pop music in the 1960s reached the nation’s television screens in February 1963, when the Beatles appeared on Independent Television’s (ITV’s) Thank Your Lucky Stars, followed in July by the Rolling Stones. However, it was ITV’s Ready Steady…

The beat group boom that reinvigorated British pop music in the 1960s reached the nation’s television screens in February 1963, when the Beatles appeared on Independent Television’s (ITV’s) Thank Your Lucky Stars, followed in July by the Rolling Stones. However, it was ITV’s Ready Steady Go!,

Iggy and the Stooges: …the band, which subsequently issued Ready to Die (2013). The 2014 death of Scott Asheton, however, seemed to mark a definitive end to the band. Iggy subsequently released the well-received Post Pop Depression (2016) and the more atmospheric Free (2019). The group was inducted into the Rock and Roll Hall…

The Notorious B.I.G.: …year, and his first album, Ready to Die, was released in 1994 under the name The Notorious B.I.G. Popular singles from that album include “Juicy” and “Big Poppa”—the latter earning him a Grammy nomination for best rap solo performance. Both before and after the release of the album, he collaborated…

If you have auto insurance or home insurance, you know those contracts typically expire every 12 months. Just before the expiration date comes up each year, you’ll receive a renewal notice from your insurance broker. If you accept the terms and renew the contract, you’re essentially “rolling” your

ready-made, everyday object selected and designated as art; the name was coined by the French artist Marcel Duchamp. Duchamp created the first ready-made, Bicycle Wheel (1913), which consisted of a wheel mounted on a stool, as a protest against the excessive importance attached to works of art.

Giorgio Armani: …style of relaxed yet luxurious ready-to-wear and elegant, intricately beaded evening wear helped introduce ease and streamlined modernity to late 20th-century and early 21st-century dressing.

Ronald Reagan: The Middle East and Central America: …which became known as the Reagan Doctrine, was applied with particular zeal in Latin America. During the 1980s the United States supported military-dominated governments in El Salvador in a bloody civil war with the Farabundo Martí National Liberation Front (Frente Farabundo Martí para la Liberación Nacional; FMLN), providing the country…

John Henninger Reagan was an American congressman who was postmaster general of the Confederate States of America and later coauthor of the bill creating the U.S. Interstate Commerce Commission. Reagan went to Texas in 1839 and fought against the Cherokees. He worked as a surveyor and studied law,

Nancy Reagan was an American first lady (1981–89)—the wife of Ronald Reagan, 40th president of the United States—and actress, noted for her efforts to discourage drug use by American youths. Christened Anne Frances, she was quickly nicknamed Nancy by her mother and used that name throughout her

Nancy Reagan was an American first lady (1981–89)—the wife of Ronald Reagan, 40th president of the United States—and actress, noted for her efforts to discourage drug use by American youths. Christened Anne Frances, she was quickly nicknamed Nancy by her mother and used that name throughout her