Complementarity


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complementarity

[‚käm·plə·mən′tar·əd·ē]
(quantum mechanics)
The principle that nature has complementary aspects, particle and wave; the two aspects are related by p = h /λ and E = h ν, where p and E are the momentum and energy of the particle, λ and ν are the length and frequency of the wave, and h is Planck's constant.

Complementarity

 

in molecular biology, the mutual correspondence that makes for the connection between complementary structures (macromoiecules, molecules, radicals) and is determined by the chemical properties of the structures.

According to J. Watson, complementarity is possible if the surfaces of the molecules have complementary structures, so that a protruding group or positive charge on one surface corresponds to a cavity or negative charge on the other; in other words, interacting molecules must fit one another like lock and key. The complementarity of chains of nucleic acids is based on the interaction of their nitrogenous bases. Thus, only when the arrangement is such that the adenine (A) in one chain is opposite the thymine (T) or uracyl (U) in the other and the guanine (G) in one is opposite the cytosine (C) in the other will there be hydrogen bonds between the bases of the chains. Complementarity seems to be the only and universal chemical mechanism for the storage and transmission of genetic information.

Another example of complementarity is the interaction of an enzyme with its corresponding substrate. In immunology, the word “complementarity” refers to the relationship between an antigen and its corresponding antibodies. The term “complementarity” is sometimes used in biological literature in a sense that is closely related to the concept of complementation.

REFERENCE

Watson, J. Molekuliarnaia biologiia gena. Moscow, 1967. (Translated from English.)

V. N. SOIFER

References in periodicals archive ?
Amid the recent changes in the country's educational landscape, educators urged the government and various stakeholders reiterate complementarity between public and private educational institutions and recognize the contribution of the private sector.
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Throughout John Paul M's papacy, complementarity increasingly entered the Catholic vocabulary.
Subject and Object are not yet differentiated, they form the primordial qualia relationship between what eventually will become a separated object from subject, the fundamental complementarity. The adjoint [A.sup.+] is used in keeping with Hilbert space formalism.
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Pursuant to Article 17 of the Rome Statute of the International Criminal Court (ICC), (1) where the provisions of the complementarity regime have been enshrined, the Pre-Trial Chamber I (PTCI) (2) and the Appeals Chamber (AC) (3) of the ICC have respectively declared the case against Abdullah al-Senussi, the former chief of Libyan intelligence, inadmissible and thus subject to domestic proceedings conducted by the competent Libyan authorities.
In this study, we introduce new measurements that utilize IP data to gauge the two dimensions, strategic complementarity and status symmetry, and map them against each other.
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Part I describes the role of the ICC in the international criminal justice system, elaborates on the importance of the principle of complementarity to the goals of the institution, and surveys critiques that have been levied against the Court.