Isolation

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isolation

[‚ī·sə′lā·shən]
(chemistry)
Separation of a pure chemical substance from a compound or mixture; as in distillation, precipitation, or absorption.
(computer science)
The ability of a logic circuit having more than one input to ensure that each input signal is not affected by any of the others.
(evolution)
The restriction or limitation of gene flow between distinct populations due to barriers to interbreeding.
(medicine)
Separation of an individual with a communicable disease from other, healthy individuals.
(microbiology)
Separation of an individual or strain from a natural, mixed population.
(physiology)
Separation of a tissue, organ, system, or other part of the body for purposes of study.
(psychology)
Dissociation of a memory or thought from the emotions or feelings associated with it.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

Isolation

Reduction of vibration or sound; usually involving resilient surfaces or mountings or discontinuous construction.
Illustrated Dictionary of Architecture Copyright © 2012, 2002, 1998 by The McGraw-Hill Companies, Inc. All rights reserved
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Isolation

 

in biology, the limitation or disruption of free interbreeding between individuals and of mixing (panmixia) of different forms of organisms; one of the elemental factors of evolution.

Using island fauna and flora as an example, C. Darwin demonstrated the role of isolation in the emergence, expansion, and accentuation of differences between closely related forms of living organisms. If part (most often a peripheral part) of an original population is isolated by geographic obstacles, that part may in time be transformed into an independent species. This geographic (allopatric) means of species formation is, in the opinion of many biologists, the only, or, in any case, the main path of speciation. On the macroevolutionary level, isolation is a function of the inability of different species to interbreed, that is, it has a predominantly reproductive character. On the microevolu-tionary level (that is, on the intraspecific level), there are two principal types of isolation: territorial-mechanical isolation, which includes all cases of the emergence of barriers between different parts of a population or between different populations (for example, water to terrestrial organisms and dry land to aquatic organisms, or mountains to lowland species and lowlands to mountain species), and biological isolation, which is divided into three subgroups: (1) ecological isolation, in which individuals of two or more biotypes rarely or never meet during the reproductive period; (2) morphophysiological isolation, in which copulation is difficult or impossible for morphological or ethological (behavioral) reasons; and (3) strictly genetic isolation, caused by the defectiveness (decreased vitality or fertility or complete sterility) of the hybrids obtained from certain inter-breedings. All forms of isolation may exert various pressures on populations, since any form of isolation may be expressed quantitatively in varying degree. Territorial-mechanical isolation (or geographic, for large territories) leads to allopatric form development; given a sufficiently prolonged period of effect, it leads to the appearance of certain forms of biological isolation. Instances of the emergence of biological isolation may lead to sympatric development.

REFERENCES

Darwin, C. Proiskhozhdenie vidov putem estestvennogo otbora. So-chineniia, vol. 3. Moscow-Leningrad, 1939.
Geptner, V.G. Obshchaia zoogeografiia. Moscow, 1936.
Ehrlich, P., and R. Holm. Protsess eveoliutsii. Moscow, 1966. (Translated from English.)
Shmal’gauzen, I.I. Faktory evoliutsii, 2nd ed. Moscow, 1968.
Timofeev-Resovskii, N. V., N.N. Vorontsov, and A.V. Iablokov. Kratkii ocherk teorii evoliutsii. Moscow, 1969.
Shmal’gauzen, I.I. Problemy darvinizma, 2nd ed. Leningrad, 1969.

V. G. GEPTNER and N. N. TIMOFEEV-RESOVSKII


Isolation

 

the intonational and semantic separation of part of a sentence (together with dependent words), making it syntactically independent.

Intonational separation is accomplished by raising the voice before the part to be isolated and by using pauses and phrase stress. Word order is frequently changed. The semantic and stylistic function of isolation consists in the more precise expression of an idea or the further description of a person or object.

Isolation often lends expressive color to a sentence. In writing, the isolated parts of a sentence are usually set off by commas or, more rarely, by dashes. For example, “Right opposite the military post, on the far shore, it was deserted” (L. N. Tolstoy).

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.

Isolation

Alcatraz Island
“The Rock”; former federal prison in San Francisco Bay. [Am. Hist.: Flexner, 218]
Alison’s House
reclusive woman guards secrets and poems of her dead sister. [Am. Drama: Glaspel Alison’s House in Sobel, 18]
Aschenbach, Gustave von
spiritual and emotional solitude combine in writer’s deterioration. [Ger. Lit.: Death in Venice]
Count of Monte Cristo
Edmond Dantès imprisoned in the dungeons of Château D’If for 14 years. [Fr. Lit.: The Count of Monte Cristo, Magill I, 158–160]
Crusoe, Robinson
man marooned on a desert island for 24 years. [Brit. Lit.: Robinson Crusoe, Magill I, 839–841]
Dickinson, Emily
(1830–1886) secluded within the walls of her father’s house. [Am. Lit.: Hart, 224]
Hermit Kingdom Korea,
when it alienated itself from all but China (c. 1637—c. 1876). [Korean Hist.: NCE, 1233]
Iron Curtain
political and ideological barrier of secrecy concealing Eastern bloc. [Eur. Hist.: Brewer Dictionary, 490]
Magic Mountain, The
suspended in time, which exists in flat world below. [Ger. Lit.: The Magic Mountain, Magill I, 545–547]
Man Without a Country, The
story of man exiled from homeland. [Am. Lit.: The Man Without a Country, Magill I, 553–557]
Olivia
“abjured the company and sight of men.” [Br. Lit.: Twelfth Night]
prisoner of Chillon
cast into a lightless dungeon and chained there for countless years. [Br. Lit.: Byron The Prisoner of Chillon in Benét, 817]
Selkirk, Alexander
(1676–1721) marooned on Pacific island; thought to be prototype of Robinson Crusoe. [Scot. Hist.: EB, IX: 45]
Sleepy Hollow
out-of-the-way, old-world village on Hudson. [Am. Lit.: “Legend of Sleepy Hollow” in Benét, 575]
Stylites
medieval ascetics; resided atop pillars. [Christian Hist.: Brewer Dictionary, 1045]
Stylites, St. Simeon
lived 36 years on platform atop pillar. [Christian Hagiog.: Attwater, 309]
Allusions—Cultural, Literary, Biblical, and Historical: A Thematic Dictionary. Copyright 2008 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
DGGE profiles were more similar within than between the 2 isolation techniques. Although different banding patterns were apparent, the same general results were observed for the Bay Falls sample analysis (Fig.
Pattern shapint to reduce antenna backlobe gain, and thus reducing the coupling to an aft-located antenna, is a viable isolation technique. Significant backlobe variation is observed between a typical wideband directional horn (a) and omni noch (b) antennas, as shown in Figure 7.
These factors will need proper investigation prior incorporation into isolation techniques. The risk of these more vigorous approaches is cell damage and death; therefore, it will be important to assess cell viability in such intended studies.
Environmental Legionella Isolation Techniques Evaluation certification does not yet validate for Legionella detection by PCR at this time.
They added that the OS uses privileges and isolation techniques to create sandbox processes, and these "chambers" are based on a policy system that, in turn, defines which system features the processes operating in a chamber can access.
Developments in magnetic bead technology have given rise to magnetic isolation techniques for a range of applications, from molecular isolation of specific targets, such as proteins and nucleic acids, to isolation of specific cell subtypes.
Isolation techniques include the use of specific measures related to the way an organism is transmitted.
Lung isolation techniques can facilitate thoracic surgery but not all thoracotomies require one-lung ventilation, especially in paediatric patients.
"The convergence of the strengths of both parties SIgN's in-depth capabilities in immunology and infectious diseases, together with Cytos' established antibody isolation techniques brings about a synergy that will catalyze the translation of basic scientific knowledge into useful clinical applications.
It's a difficult approach for today's dancers, trained in ballet or isolation techniques. Sometimes, she says, she has to do "brainwashing" in order to instill the idea that the movement originates inside, and that the dancer is a unit--body, mind, and spirit.
Chicken samples were processed using standard isolation techniques; however, at the final step, Campylobacter enrichments were streaked onto agar plates both with and without ciprofloxacin (a second-generation FQ used to treat human disease).