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 ?
Specific comparisons of abundance change in response to nutrient treatments within each functional group for an alpine dry meadow community after fertilization with N, P, and N+P.
While functional group and species responses to the environmental watering event differed, a key outcome from this study was the increase in rare species records for Hattah-Kulkyne National Park.
And they represent just a small sample of the possibilities; we think that we can apply our technique to many compound classes and functional groups.
Advanced postgraduates, researchers and academics will like the resource's concentration on important recent developments in functional group chemistry that have not been adequately covered by reviewers or other secondary sources.
My PhD research uses a removal experiment to examine the roles of different plant functional groups (groups of plants that have similar roles in a community, e.
Total biomass was still significantly dependent on species number and functional group composition in the remaining 131 plots.
Tour and his colleagues used a technique similar to one by which chemists link functional groups to graphite, which forms from flat sheets of carbon.
The functional groups identified included `grass-eating', `broadleaf-eating', `algae-eating' and `open ground dwelling' grasshoppers.
Compensatory dynamics exist when there is greater negative than positive covariance among species within a functional group and consequently reduced variance in the group taken as a whole.
The mechanical film strength developments and the effects of functional group density of reactive latexes on the relative rates of interdiffusion and crosslinking reaction during film formation and annealing process were investigated.
The experimental design is a randomized complete block with 10 functional group mixes and six replicates, for a total of 60 plots.

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