principle

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principle

1. a rule or law concerning a natural phenomenon or the behaviour of a system
2. Chem a constituent of a substance that gives the substance its characteristics and behaviour
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Principle

 

the basic initial assumption of any theory, teaching, science, world view, or political organization; an individual’s internal conviction, which determines his relationship to reality, behavioral norms, and activity; the basic characteristic of the structure of any mechanism or apparatus.

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

principle

[′prin·sə·pəl]
(science and technology)
A scientific law which is highly general or fundamental, and from which other laws are derived.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
This view is attractive in light of what has been said above (part I) concerning the active principle and the World Soul.
The aim of the present review was to highlight the ethnomedical and veterinary uses of the most common Tephrosia species and especially the great potential of pharmacologically active principles contained in T.
The studies to establish bioequivalence (BE) are carried out to identify significant statistical differences during the behavior in vivo of pharmaceutical equivalent products, that they have the same amount of active principle; they appear in the same form of dosage and fulfill the requirements of the pharmacopoeias officially accepted for the check tests of quality to finished products (4).
Research has also to be carried out in methodology for estimation of active principles and for detection of adulteration.
Boswellic acids (components of frankincense) as the active principle in treatment of chronic inflammatory diseases.
It is considered a particularly suitable carrier for dermatological preparations applied to the skin or in the external ear, since it is well tolerated, easily absorbed and spreads to the dermic layer allowing an optimal absorption of the active principle. This oil is obtained through the cold pressing of Priunus dulcis's seeds and it is traditionally well known as eudermic, with a marked moisturizing, emollient, lenitive anti-inflammatory and anti-itching activity (Pisseri et al.
Semisynthesis: active principle's natural structure is sometimes synthetically modified, semisynthesis is carried out in reactors with a capacity of up to 10000 liters per batch, reactors can be in glass, enamel or AISI 316 stainless steel.