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  • intimacy (human behaviour)

    Intimacy, the state of being intimate, which is marked by the consensual sharing of deeply personal information. It has cognitive, affective, and behavioral components. Intimates reveal themselves to one another, care deeply about one another, and are comfortable in close proximity.

  • intimacy (acoustics)

    acoustics: Acoustic criteria: “Intimacy” refers to the feeling that listeners have of being physically close to the performing group. A room is generally judged intimate when the first reverberant sound reaches the listener within about 20 milliseconds of the direct sound. This condition is met easily in a…

  • intimal arteriosclerosis (pathology)

    Atherosclerosis, chronic disease caused by the deposition of fats, cholesterol, calcium, and other substances in the innermost layer of endothelium of the large and medium-sized arteries. Atherosclerosis is the most common arterial abnormality characterized as arteriosclerosis, which is defined by

  • Intimate Gallery (gallery, New York City, New York, United States)

    Alfred Stieglitz: Later career: …opened two additional galleries: the Intimate Gallery, from 1925 to 1929, and An American Place, from 1929 until his death in 1946. These small galleries were dedicated almost exclusively to the exhibition of the American Modernist artists in whom Stieglitz believed most deeply: Demuth, Arthur G. Dove, Hartley, John Marin,…

  • Intimate Life of Emperor Wu of Han (Chinese tale)

    Daoism: Influence on secular literature: …a very famous tale, the Intimate Life of Emperor Wu of Han (Han Wudi neizhuan; late 6th century), which in highly polished terms describes the visit to the emperor of a goddess, the Queen Mother of the West. This work, in turn, made a decisive contribution to the development of…

  • Intimism (art)

    Intimism, variety of late 19th- and early 20th-century painting that made an intense exploration of the domestic interior as subject matter. It was practiced principally by Pierre Bonnard and édouard Vuillard, the two most distinguished members of the Nabis. To convey the warmth, comfort, and quiet

  • intine (pollen structure)

    pollen: …are an inner layer, the intine, and an outer layer, the exine. The intine consists, at least in part, of cellulose or hemicellulose. The outer and most durable layer, the exine, is very resistant to disintegration; treatment with intense heat, strong acids, or strong bases has little effect upon it.…

  • Intiraymi (Inca ceremony)

    Native American dance: The Andean region: …with the Inca solstice ceremony, intiraymi, and presents an excuse for the reappearance of the native sun god in a huge gold disc headdress.

  • Into the Abyss: A Tale of Death, a Tale of Life (film by Herzog [2011])

    Werner Herzog: …the Chauvet cave in France; Into the Abyss (2011), a sombre examination of a Texas murder case; and Lo and Behold: Reveries of the Connected World (2016), about the Internet. In Meeting Gorbachev (2018; codirected with Andre Singer), he chronicled the life of the former president of the Soviet Union.…

  • Into the Labyrinth (novel by Mallet-Joris)

    Fran?oise Mallet-Joris: …Le Rempart des béguines (1951; The Illusionist, also published as Into the Labyrinth and The Loving and the Daring), the story of an affair between a girl and her father’s mistress, described with clinical detachment in a sober, classical prose. A sequel, La Chambre rouge (1953; The Red Room), and…

  • Into the West (song by Walsh, Shore, and Lennox)
  • Into the Wild (film by Penn [2007])

    Sean Penn: Penn returned to directing with Into the Wild (2007). The film—based on Jon Krakauer’s best-selling book of the same name—chronicles the journey of Christopher McCandless, an idealistic college graduate who repudiates materialistic society as he hitchhikes through the American West and ventures alone into the Alaskan wilderness.

  • Into the Woods (film by Marshall [2014])

    Emily Blunt: …singing was on display in Into the Woods (2014), the Disney adaptation of the Stephen Sondheim musical. She then won plaudits for her turn as an FBI agent in the gritty crime drama Sicario (2015).

  • Into the World Came a Soul Called Ida (painting by Albright)

    Ivan Albright: In 1930 he completed Into the World Came a Soul Called Ida, a portrait of an aging, flabby woman looking into a mirror. Ultrarealistic, it conveys the ravages of time with startling surface detail. His first one-man show was held in Chicago the same year.

  • Intolerable Acts (Great Britain [1774])

    Intolerable Acts, (1774), in U.S. colonial history, four punitive measures enacted by the British Parliament in retaliation for acts of colonial defiance, together with the Quebec Act establishing a new administration for the territory ceded to Britain after the French and Indian War (1754–63). The

  • Intolerable Cruelty (film by Coen [2003])

    Catherine Zeta-Jones: …appeared in several comedies, including Intolerable Cruelty (2003), in which she played a cunning gold digger opposite George Clooney, and The Terminal (2004), a film directed by Spielberg and featuring Tom Hanks. In 2004 she starred with Clooney, Brad Pitt, and Matt Damon in Ocean’s Twelve, a sequel to the…

  • Intolerance (film by Griffith [1916])

    Intolerance, epic American silent film, released in 1916, that is notable for its vast sets and for its intricate plot structure. A plea for tolerance, it was director D.W. Griffith’s response to the censorship and controversy that arose over the overt racism found in his previous film, The Birth

  • Intolerance: A Sun-Play of the Ages (film by Griffith [1916])

    Intolerance, epic American silent film, released in 1916, that is notable for its vast sets and for its intricate plot structure. A plea for tolerance, it was director D.W. Griffith’s response to the censorship and controversy that arose over the overt racism found in his previous film, The Birth

  • Intolerance: Love’s Struggle Throughout the Ages (film by Griffith [1916])

    Intolerance, epic American silent film, released in 1916, that is notable for its vast sets and for its intricate plot structure. A plea for tolerance, it was director D.W. Griffith’s response to the censorship and controversy that arose over the overt racism found in his previous film, The Birth

  • Intolleranza 1960 (work by Nono)

    Luigi Nono: When his opera Intolleranza 1960, which Nono referred to as a “mural,” premiered in Venice in 1961, the performance was stormed by neofascists, causing a riot with the communists. The work attacked fascism, the atom bomb, and segregation and ended in a symbolic fashion in which the world…

  • intonaco (fresco painting)

    fresco painting: The final, smooth coat (intonaco) of plaster is then troweled onto as much of the wall as can be painted in one session. The boundaries of this area are confined carefully along contour lines, so that the edges, or joints, of each successive section of fresh plastering are imperceptible.…

  • intonation (speech)

    Intonation, in phonetics, the melodic pattern of an utterance. Intonation is primarily a matter of variation in the pitch level of the voice (see also tone), but in such languages as English, stress and rhythm are also involved. Intonation conveys differences of expressive meaning (e.g., surprise,

  • intonation (music)

    Tuning and temperament, in music, the adjustment of one sound source, such as a voice or string, to produce a desired pitch in relation to a given pitch, and the modification of that tuning to lessen dissonance. The determination of pitch, the quality of sound that is described as ‘high” or “low,”

  • intonazione (music)

    Western music: Musical forms: …joined by the fantasia, the intonazione, and the toccata in a category frequently referred to as “free forms” because of the inconsistency and unpredictability of their structure and musical content—sections in imitative counterpoint, sections of sustained chords, sections in virtuoso figuration. If a distinction must be made, it might be…

  • intoxication (alcohol)

    alcohol consumption: Intoxication: Alcohol is a drug that affects the central nervous system. It belongs in a class with the barbiturates, minor tranquilizers, and general anesthetics, and it is commonly classified as a

  • intoxication (microorganisms)

    meat processing: Food-poisoning microorganisms: …cause health problems by either intoxication or infection. Intoxication occurs when food-poisoning microorganisms produce a toxin that triggers sickness when ingested. Several different kinds of toxins are produced by the various microorganisms. These toxins usually affect the cells lining the intestinal wall, causing vomiting and diarrhea. Microorganisms capable of causing…

  • intra-articular fibrocartilage (anatomy)

    joint: Intra-articular fibrocartilages: Intra-articular fibrocartilages are complete or incomplete plates of fibrocartilage that are attached to the joint capsule (the investing ligament) and that stretch across the joint cavity between a pair of conarticular surfaces. When complete they are called disks; when incomplete they are called…

  • intracellular fluid (biochemistry)

    extracellular fluid: It differs from intracellular fluid (fluid within the cells) in that it generally has a high concentration of sodium and low concentration of potassium, while intracellular fluid is high in potassium and low in sodium. The fluid is often secreted by cells to provide a constant environment for…

  • intracellular parasitism (biology)

    parasitism: …in the host’s body) or intracellular (inhabiting cells in the host’s body). Intracellular parasites—such as bacteria or viruses—often rely on a third organism, known as the carrier, or vector, to transmit them to the host. Malaria, which is caused by a protozoan of the genus Plasmodium transmitted to humans by…

  • intracloud lightning (meteorology)

    atmosphere: Lightning and optical phenomena: …of the cloud, as in intracloud lightning, and between the cloud and the positively charged ground, as in cloud-to-ground lightning. The passage of the lightning through the air heats it to above 30,000 K (29,725 °C, or 53,540 °F), causing a large increase in pressure. This produces a powerful shock…

  • Intracoastal Waterway (shipping route, United States)

    Intracoastal Waterway, navigable toll-free shipping route, extending for about 3,000 miles (4,800 km) along the Atlantic Ocean and Gulf of Mexico coasts in the southern and eastern United States. It utilizes sounds, bays, lagoons, rivers, and canals and is usable in many portions by deep-draft

  • intracontinental mountain belt (geology)

    mountain: Intracontinental mountain belts: In some regions, mountain belts have been formed by crustal shortening within a continental mass, rather than where two continents have collided. Some 40,000,000 to 80,000,000 years ago, the Rocky Mountains of Colorado, Utah, and Wyoming formed in this way, and today…

  • intracranial bleeding (medical disorder)

    stroke: Types and symptoms: A hemorrhagic stroke, involving intracranial bleeding, may occur after an artery ruptures, usually as a result of a weakening of the arterial wall because of atherosclerosis or because of a thinning of the wall along with bulging (aneurysm), often due to hypertension.

  • intracranial pressure

    nervous system disease: Raised or decreased intracranial pressure: The circulation of cerebrospinal fluid may be obstructed so that it accumulates in the skull. This condition, called hydrocephalus, may result from congenital stenosis, or narrowing, of the aqueduct of Sylvius, tumours, meningitis, or blood accumulating

  • intracrystalline gliding (crystallography)

    ice: Mechanical properties: It involves two processes: intracrystalline gliding, in which the layers within an ice crystal shear parallel to each other without destroying the continuity of the crystal lattice, and recrystallization, in which crystal boundaries change in size or shape depending on the orientation of the adjacent crystals and the stresses…

  • intractable problem (computer science)

    NP-complete problem: Algorithms for solving hard, or intractable, problems, on the other hand, require times that are exponential functions of the problem size n. Polynomial-time algorithms are considered to be efficient, while exponential-time algorithms are considered inefficient, because the execution times of the latter grow much more rapidly as the problem size…

  • intracytoplasmic sperm injection (medical procedure)

    infertility: Treatment options: Intracytoplasmic sperm injection (ICSI) is a treatment for men with very low sperm counts or with sperm that for some other reason are unable to fertilize an egg. The first child conceived by this method was born in 1992. ICSI involves the direct injection of…

  • intradimensional shift (psychology)

    concept formation: Experimental studies: …of what is called “intradimensional” shift, initially the subject learns that GEK = GREEN; then, without warning, the experimenter changes the rule to GEK = RED. The same attribute or dimension (colour) is still relevant, but the way in which it is used has been changed. In “extradimensional” shift,…

  • intraflagellar rod (biology)

    protist: Cilia and flagella:

  • intraformational breccia (rock)

    sedimentary rock: Epiclastic conglomerates and breccias: conglomerates and breccias: intraformational, derived penecontemporaneously by eroding, transporting, and depositing material from within the depositional basin itself; and extraformational, derived from source rocks that lie outside the area in which the deposit occurs. Epiclastic conglomerates and breccias together probably make up no more than 1 or 2…

  • intraformational conglomerate (rock)

    sedimentary rock: Epiclastic conglomerates and breccias: …of epiclastic conglomerates and breccias: intraformational, derived penecontemporaneously by eroding, transporting, and depositing material from within the depositional basin itself; and extraformational, derived from source rocks that lie outside the area in which the deposit occurs. Epiclastic conglomerates and breccias together probably make up no more than 1 or 2…

  • intrafusal muscle fibre (anatomy)

    human nervous system: Muscle spindles: …specialized muscle fibres, known as intrafusal muscle fibres (from Latin fusus, “spindle”). The muscle spindle is several millimetres long, and approximately five intrafusal muscle fibres run throughout its length. They are considerably thinner and shorter than ordinary skeletal muscle fibres, although they show similar contractions and have the same histological…

  • intraindividual difference (education)

    special education: Historical background: …with another, and (2) “intraindividual differences,” which compares the child’s abilities in one area with the child’s abilities in other areas. The grouping of children in special classes rests on the concept of interindividual differences, but the instructional procedures for each child are determined by intraindividual differences—that is, by…

  • intralaminar nucleus (anatomy)

    human nervous system: Thalamus: …to the cerebral cortex by intralaminar thalamic nuclei, which are located in laminae separating the medial and ventrolateral thalamic nuclei. This ascending system is involved with arousal mechanisms, maintaining alertness, and directing attention to sensory events.

  • intraligamentous pregnancy (medicine)

    pregnancy: Ectopic pregnancy: …of the pelvis, producing an intraligamentous pregnancy. Rarely, the embryo is expelled into the abdomen and the afterbirth remains attached to the tube; the embryo lives and grows. Such a condition is referred to as a secondary abdominal pregnancy. Primary abdominal pregnancies, in which the fertilized egg attaches to an…

  • intramolecular reaction (chemistry)

    reaction mechanism: Intermolecularity and intramolecularity: The distinction between intermolecular and intramolecular processes is often useful. In intermolecular reactions, covalency changes take place in two separate molecules; in intramolecular reactions, two or more reaction sites within the same molecule are involved.

  • intramolecularity (chemistry)

    reaction mechanism: Intermolecularity and intramolecularity: The distinction between intermolecular and intramolecular processes is often useful. In intermolecular reactions, covalency changes take place in two separate molecules; in intramolecular reactions, two or more reaction sites within the same molecule are involved.

  • Intramuros (urban district, Manila, Philippines)

    Intramuros, urban district and historic walled city within Metropolitan Manila, in the Philippines. The name, from the Spanish word meaning “within walls,” refers to the fortified city founded at the mouth of the Pasig River shortly after 1571 by the Spanish conquistador Miguel López de Legazpi.

  • intranet (computer network)

    e-commerce: …deploy private Internet-type networks (intranets) for sharing information and collaborating within the company, usually insulated from the surrounding general Internet by computer-security systems known as firewalls. Collaborating businesses also frequently rely on extranets that allow encrypted communication over the Internet.

  • Intransigent UCR (political party, Argentina)

    Radical Civic Union: …president in 1958, forming the Intransigent UCR (UCR Intransigente) and collaborating with the Peronists. In response, opponents of an alliance with the Peronists established the UCR del Pueblo (People’s UCR), which won the 1963 elections following Frondizi’s removal from office in a coup the previous year. However, the party’s tenure…

  • intransitive relation (logic)

    formal logic: Classification of dyadic relations: An intransitive relation is one that, whenever it holds between one object and a second and also between that second and a third, fails to hold between the first and the third; i.e., ? is intransitive if (?x)(?y)(?z)[(?xy · ?yz) ? ~?xz] (example: “is father of”).…

  • intransitive verb (linguistics)

    ergativity: …subject, or agent, of an intransitive verb with the object, or patient, of a transitive verb. This contrasts with the situation in nominative-accusative languages such as Latin or English, in which the subjects of both transitive and intransitive verbs are paired grammatically and distinguished from the object of a transitive…

  • intraocular lens (eye surgery)

    cataract: Such implants, known as intraocular lenses, may be monofocal (set for near, far, or intermediate vision) or multifocal, which can be moved by the eye muscles to accommodate focused vision at different distances; the latter type of implant reduces the need for contact lenses or eyeglasses.

  • intraoffice signaling

    telephone: The telephone network: …case the call is designated intraoffice), or it may lie in another central office (requiring an interoffice call). If the call is intraoffice, the central office switch will handle the entire call process. If the call is interoffice, it will be directed either to a nearby central office or to…

  • intraperitoneal chemotherapy (therapeutics)

    ovarian cancer: Treatment: This so-called intraperitoneal chemotherapy allows the physician to target the drugs more directly to the cancer while limiting exposure of distant tissues. However, once a cancer has spread, general or systemic approaches such as chemotherapy are required so that as many cancerous cells as possible can be…

  • intraplate volcanism (geology)

    volcano: Intraplate volcanism: The 5 percent of known volcanoes in the world that are not closely related to plate margins are generally regarded as intraplate, or “hot-spot,” volcanoes. A hot spot is believed to be related to the rising of a deep-mantle plume, which is caused…

  • intrapulmonic pressure (physiology)

    human respiratory system: The lung–chest system: The force increases (pleural pressure becomes more negative) as the lung is stretched and its volume increases during inspiration. The force also increases in proportion to the rapidity with which air is drawn into the lung and decreases in proportion to the force with which air is expelled…

  • intraspecific brood parasitism (biology)

    animal social behaviour: The ultimate causes of social behaviour: …sometimes exhibit egg-dumping behaviour or intraspecific brood parasitism (that is, the laying of eggs in nests of other pairs, thus parasitizing their parental care). Even though female birds usually cannot tell their eggs from those of other conspecific females, this sort of parasitism is not particularly common, probably because territoriality…

  • intraspecific competition in tungara frogs

    The life forms in tropical forest ecosystems, as in all ecosystems, compete for the resources available. Members of different species may compete for a specific resource (interspecific competition), or members of the same species may compete with one another for a resource (intraspecific

  • intraspecific interaction (biology)

    Singing a Different Tune: …another for a resource (intraspecific competition). In some cases, both types of competition occur simultaneously, with a species’ success at one type working directly against its success at the other. Such is the nightly predicament of the male tungara frog (Physalaemus pustulosus) in the tropical forests of Panama.

  • Intrathecal anesthesia (pathology)

    birth: Spinal anesthesia: Spinal anesthesia (sometimes called spinal block) is produced when a local anesthetic agent, such as lidocaine or bivucaine, sometimes mixed with a narcotic, is injected into the cerebrospinal fluid in the lumbar region of the spine. This technique allows the woman to be…

  • intrauterine device (contraceptive)

    contraception: Intrauterine devices (IUDs): IUDs are plastic or metal objects in a variety of shapes that are implanted inside the uterus. How they work is unclear, though researchers suspect that they cause a mild inflammation of the endometrium, thus inhibiting ovulation, preventing fertilization, or preventing implantation…

  • intrauterine growth retardation (medicine)

    premature birth: …is to be distinguished from intrauterine growth retardation, in which weight and development are subnormal for fetal age. An estimated 1.5 to 2 percent of all babies are significantly below a birth weight proper to their fetal age. Deficiency of transplacental nutrition from various causes is frequently responsible. Other causes…

  • intravenous anesthetic (medicine)

    anesthetic: Local anesthetics: …innervating a region, usually by injection. Thus, local anesthetics are useful in minor surgical procedures, such as the extraction of teeth. The first known and generally used local anesthetic was cocaine, an alkaloid (a naturally occurring organic nitrogen-containing compound) extracted from coca leaves obtained from various species

  • intravenous immunoglobulin (biology)

    therapeutics: Immunoglobulins: Intravenous immunoglobulins (IVIGs) provide immediate antibody levels and avoid the need for painful intramuscular injections.

  • intravenous injection (medicine)

    drug: Absorption, distribution, metabolism, and elimination: …involve the gastrointestinal tract, include intravenous (injection into a vein), subcutaneous (injection under the skin), intramuscular (injection into a muscle), inhalation (infusion through the lungs), and percutaneous (absorption through intact skin).

  • intravenous pyelography (medical procedure)

    bladder cancer: Diagnosis: An X-ray imaging procedure called intravenous pyelography, in which an injectable dye travels into the urinary tract and enhances X-ray image contrast, may also be used; abnormalities seen on the film may indicate the presence of cancer. In addition, laboratory tests can detect specific chemical markers that indicate cancer.

  • intrazonal soil

    Andes Mountains: Soils: Intrazonal soils (those with weakly developed horizons) include humic clay and solonetz (dark alkaline soils) types found close to lakes and lagoons. Also included in this group are soils formed from volcanic ash in the Cordillera Occidental from Chile to Ecuador.

  • Intrepid (Canadian industrialist)

    William Stephenson, Canadian-born millionaire industrialist whose role as Britain’s intelligence chief in the Western Hemisphere in World War II was chronicled in A Man Called Intrepid (1979). The son of a lumber-mill owner, Stephenson dropped out of college to serve in the Royal Canadian Engineers

  • Intrepid (United States balloon)

    Balloon Corps: …assistant aeronauts flew the balloons Intrepid, Constitution, and Washington during the Peninsular Campaign with the Army of the Potomac with mixed results. Lowe’s ascents at Yorktown could not shake Union Gen. George McClellan’s mistaken conviction that Confederate forces there outnumbered his own or inspire him to attack the weakly defended…

  • Intrigue at the Bolshoi Ballet in 2013

    In 2013 the Bolshoi Ballet was the subject of a worldwide media scandal that captured the interest of not only balletomanes but also the uninitiated. On January 17 the company’s director, Sergey Filin, was attacked outside his Moscow apartment shortly before midnight. A masked man, approaching from

  • intrigue, comedy of (narrative genre)

    Comedy of intrigue, in dramatic literature, a comic form in which complicated conspiracies and stratagems dominate the plot. The complex plots and subplots of such comedies are often based on ridiculous and contrived situations with large doses of farcical humour. An example of comedy of intrigue

  • intrinsic activity (chemistry)

    drug: Receptors: …to bind to a receptor; efficacy (sometimes called intrinsic activity) describes the ability of the drug-receptor complex to produce a physiological response. Together, the affinity and the efficacy of a drug determine its potency.

  • intrinsic asthma (pathology)

    respiratory disease: Asthma: The other form of asthma, intrinsic, may develop at any age, and there may be no evidence of specific antigens. Persons with intrinsic asthma experience attacks of airway obstruction unrelated to seasonal changes, although it seems likely that the airway obstruction may be triggered by infections, which are assumed to…

  • intrinsic branching programming (teaching)

    programmed learning: Branching, or intrinsic, programming, was initially developed in conjunction with the use of an electronic training device for military personnel. This technique provides the student a piece of information, presents a situation requiring a multiple choice or recognition response, and on the basis of that…

  • intrinsic conductivity

    materials testing: Measurement of electrical properties: Heat-caused conductivity is called intrinsic, while that attributable to extra electrons from impurity atoms is called extrinsic.

  • intrinsic factor (protein)

    Intrinsic factor, a glycoprotein (i.e., a complex compound containing both polysaccharide and protein components) with which vitamin B12 (cyanocobalamin) must combine to be absorbed by the gut. Intrinsic factor is secreted by parietal cells of the gastric glands in the stomach, where it binds with

  • intrinsic heterogeneity (chemistry)

    sample preparation: Theory: …constitution heterogeneity, which is the intrinsic heterogeneity of the material’s components, and distribution heterogeneity, which is the heterogeneity that derives from the spatial mixing of the components. While this dichotomy can be usefully applied to many material types, it is best described and understood in reference to particulate solid mixtures.…

  • intrinsic motive (behaviour)

    motivation: ” Push motives concern internal changes that have the effect of triggering specific motive states. Pull motives represent external goals that influence one’s behaviour toward them. Most motivational situations are in reality a combination of push and pull conditions. For example, hunger, in part, may be signaled by internal…

  • intrinsic neuron (physiology)

    human nervous system: Enteric nervous system: Three functional classes of intrinsic enteric neurons are recognized: sensory neurons, interneurons, and motor neurons. Sensory neurons, activated by either mechanical or chemical stimulation of the innermost surface of the gut, transmit information to interneurons located within the Auerbach and the Meissner plexi, and the interneurons relay the information…

  • intrinsic pathway (physiology)

    coagulation: …separate pathways, designated extrinsic and intrinsic. Both pathways result in the production of factor X. The activation of this factor marks the beginning of the so-called common pathway of coagulation, which results in the formation of a clot.

  • intrinsic pathway (cytology)

    apoptosis: Regulation of apoptosis: Employing the intrinsic pathway, cancer cells, cells that are infected with bacteria or virus particles, and mutant cells can be assigned to apoptosis. The extrinsic pathway is commonly associated with cellular death receptors.

  • intrinsic programming (teaching)

    programmed learning: Branching, or intrinsic, programming, was initially developed in conjunction with the use of an electronic training device for military personnel. This technique provides the student a piece of information, presents a situation requiring a multiple choice or recognition response, and on the basis of that…

  • intrinsic protein (biology)

    cell membrane: …type of protein, called the intrinsic proteins. The intrinsic proteins, as their name implies, are firmly embedded within the phospholipid bilayer. In general, membranes actively involved in metabolism contain a higher proportion of protein.

  • intrinsic rate of natural increase (statistics)

    population ecology: Calculating population growth: This is known as the intrinsic rate of natural increase (r), or the Malthusian parameter. Very simply, this rate can be understood as the number of births minus the number of deaths per generation time—in other words, the reproduction rate less the death rate. To derive this value using a…

  • intrinsic value

    axiology: …commonly made between instrumental and intrinsic value—between what is good as a means and what is good as an end. John Dewey, in Human Nature and Conduct (1922) and Theory of Valuation (1939), presented a pragmatic interpretation and tried to break down this distinction between means and ends, though the…

  • intrinsic variable star

    star: Variable stars: Such intrinsic variable stars are dealt with in this section.

  • introduced species (ecology)

    conservation: Introduced species: The case histories previously discussed often implicate introduced species as a cause of species extinctions. Humans have spread species deliberately as they colonized new areas, just one example being the Polynesians as they settled the eastern Pacific islands. New Yorkers in the 1890s…

  • Introducing Dorothy Dandridge (American film)

    Halle Berry: …Oscar, in the television film Introducing Dorothy Dandridge (1999). That performance earned her Emmy and Golden Globe awards.

  • Introductio in analysin infinitorum (work by Euler)

    trigonometry: From geometric to analytic trigonometry: …1748 in his great work Introductio in analysin infinitorum—although Roger Cotes already knew the formula in its inverse form ?i = log (cos ? + i sin ?) in 1714. Substituting into this formula the value ? = π, one obtains eiπ = cos π + i sin π =…

  • Introductio in Universam Geographiam (work by Clüver)

    Philipp Clüver: …works the most important is Introductio in Universam Geographiam (1624; “Introduction to Universal Geography”). The first of its six volumes deals in general with the Earth, but it is the remaining five on which his reputation rests. They contain short descriptions of countries and stress human and historical considerations. The…

  • Introduction à l’étude comparative des langues indo-européennes (work by Meillet)

    Antoine Meillet: …considered his most important work, Introduction à l’étude comparative des langues indo-européennes (“Introduction to the Comparative Study of the Indo-European Languages”), which explained the relationships of the languages to one another and to the parent Indo-European tongue. Advancing a theory of linguistic differentiation, he suggested that languages that developed farther…

  • Introduction à la connaissance de l’esprit humain, suivie de réflexions et de maximes (work by Vauvenargues)

    Luc de Clapiers, marquis de Vauvenargues: …grew in esteem with time, Introduction à la connaissance de l’esprit humain, suivie de réflexions et de maximes (1746; “Introduction to an Understanding of the Human Mind, Followed by Reflections and Maxims”). It consisted of the title essay and some 700 maxims, aphorisms, and reflections.

  • Introduction à la médecine expérimentale (work by Bernard)

    Claude Bernard: Recognition and later work.: …à la médecine expérimentale (1865; An Introduction to the Study of Experimental Medicine).

  • Introduction à la metaphysique (work by Bergson)

    Henri Bergson: Philosophical triumphs: …Introduction à la metaphysique (1903; An Introduction to Metaphysics). The latter provides perhaps the best introduction to his philosophy by offering the clearest account of his method. There are two profoundly different ways of knowing, he claimed. The one, which reaches its furthest development in science, is analytic, spatializing, and…

  • Introduction à la révolution fran?aise (work by Barnave)

    Antoine Barnave: Barnave’s Introduction à la révolution fran?aise (“Introduction to the French Revolution”), written during his imprisonment at Grenoble, is considered a major document of the Revolution. The work, in which he outlines the “natural history” of society’s evolution toward the hegemony of the middle class, was one…

  • Introduction to a Devout Life (work by Saint Francis of Sales)

    Saint Francis of Sales: He wrote the devotional classic Introduction to a Devout Life (3rd definitive edition, 1609), which emphasized that spiritual perfection is possible for people busy with the affairs of the world and not only, as many believed at the time, for those who withdraw from society. In 1923 Pope Pius XI…

  • Introduction to a General Stud Book, An (work by Weatherby)

    horse racing: Bloodlines and studbooks: In 1791 Weatherby published An Introduction to a General Stud Book, the pedigrees being based on earlier Racing Calendars and sales papers. After a few years of revision, it was updated annually. All Thoroughbreds are said to descend from three “Oriental” stallions (the Darley Arabian, the Godolphin Barb, and…

  • Introduction to Arithmetic (work by Nicomachus)

    Nicomachus of Gerasa: …who wrote Arithmētikē eisagōgē (Introduction to Arithmetic), an influential treatise on number theory. Considered a standard authority for 1,000 years, the book sets out the elementary theory and properties of numbers and contains the earliest-known Greek multiplication table.

  • Introduction to Cosmography (work by Waldseemüller)

    Americas: …in his Cosmographiae introductio (1507; Introduction to Cosmography) and observed that “another fourth part [of the inhabited earth] had been discovered by Americus Vespucius,” and he suggested that the new land be called America, in recognition of that explorer’s voyages. Waldseemüller’s book was widely read, and the new appellation was…

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