functional group

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functional group,

in organic chemistry, group of atoms within a molecule that is responsible for certain properties of the molecule and reactions in which it takes part. Organic compounds are frequently classified according to the functional group or groups they contain. For example, methanol, ethanol, and isopropanol are all classified as alcohols since each contains a functional hydroxyl group.

functional group

[¦fəŋk·shən·əl ′grüp]
(organic chemistry)
An atom or group of atoms, acting as a unit, that has replaced a hydrogen atom in a hydrocarbon molecule and whose presence imparts characteristic properties to this molecule; frequently represented as R‒. Also known as functionality.
References in periodicals archive ?
A total of 49 cases were classified into three groups according to splenic function: a splenectomy group, a normal splenic function group (control group), and a hypersplenism group.
With respect to the side reaction, FTIR also confirms the existence of other function group, such as carbonyl group (-OH) and hydroxyl group (-C=0) in dissoluble parts.
The association between cognition and gait performance was tested using a multivariate analysis of covariance (ANCOVA) to compare mean DGI and POMA scores at the beginning of rehabilitation between four cognitive function groups as measured by OASIS M0560 (independent, requires prompting, some assistance, and considerable assistance).
Very High Cognitive Function Group Versus Very Low Cognitive Function Group
Figure 7 shows the more detailed result by function group.
The prevalence of hypertension was significantly higher in decreased renal function group compared to control group (p=0.
Dr Jim Heighway, leader of the Gene Function group based at the Foundation's research facility in Liverpool said: "Early diagnosis could mean early treatment, giving people many more years to live.
Molecular biologist Dr Shirley Smith, originally from Whiston, has joined the centre's gene function group.
Dr Jim Heighway, senior scientist and gene function group leader, received the accolade on behalf of the Foundation.
The high cognitive function group included patients whose cognitive performance scale scores suggested their cognitive abilities were mildly impaired, borderline or intact.
The function group receiving the output is considered the "internal client.
The study objectives derived from this basic assumption were 1) survey the quality of groundwater sources under the jurisdiction of the Orange County Water District to determine the extent and character of color and dissolved organic matter; 2) develop characteristic AMS distributions and define acidic function group compositions for the groundwater sources; 3) conduct bench-scale testing techniques for several potential water treatment processes; and 4) evaluate the processes from an AMS perspective, as well as color removal.