functional group


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Related to functional group: Homologous series

func·tion (f),

(fŭnk'shŭn),
1. The special action or physiologic property of an organ or other part of the body.
2. To perform its special work or office, said of an organ or other part of the body.
3. The general properties of any substance, depending on its chemical character and relation to other substances, according to which it may be grouped (for example, acids, bases, alcohols, esters).
4. A particular reactive grouping in a molecule, for example, a functional group, such as the -OH group of an alcohol.
5. A quality, trait, or fact that is so related to another as to be dependent on and to vary with this other.
6. A mathematic variable or expression.
[L. functio, fr. fungor, pp. functus, to perform]

functional group (funkˑ·shl grōōpˑ),

n an atom or group of atoms of a molecule that is chemically reactive and imparts the chemical characteristics of a molecule. Alkenes, aldehydes, alcohols, carboxylic acids, ketones, and esters are common functional groups.
References in periodicals archive ?
These functional groups are capable of associating with one another through chemical reactions to form a crosslinked network (11, 12).
Authenticate users from different functional groups and geographic locations via LDAP (Lightweight Directory Access Protocol) making it easier to manage and control expanded usage of the aPriori platform.
The Chemistry of Functional Groups Series was originally founded by Saul Patai (1918-1998) and in the 39 years of publishing has produced more than 100 volumes, providing outstanding reviews on all aspects of functional groups including analytical, physical and synthetic and applied chemistry.
And what if it is also on the hard-to-access meta position, facing away from the nearest functional group in terms of geometry?
Its comprehensive nature sets it apart from organic chemistry databases and more basic resources in functional group chemistry.
In another embodiment, the branched alkyl functional group has from 3 to 8 carbon atoms.
Every plant functional group has high-level objectives and targets, and if the raw operational data can be converted in real-time or near real-time into KPIs, then non-compliance to operational targets can quickly be identified, decisions can be made and actions taken.
Those in the functional group had more severe cognitive fatigue than the organic group (a score of 18 out of 40 on the FIS versus 15) and psychosocial fatigue (35 out of 80 versus 29).
This functional group acted as an electron basin, which makes the system act like a quantum well, trapping electron density between two barriers (in the case of a device, a molecule between two electrodes).
QFD systematically aims to ensure that important issues are not lost or misinterpreted as a project is handed off from functional group to functional group.
The dependence of biomass on species number and functional group composition became progressively stronger, accounting for one-third of the variation (variance) in 1997 and two-thirds in 2000.
The process can attach a functional group to as many as 1 out of every 20 carbons on a nanotube, which can contain millions of carbon atoms.

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