isomer


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isomer

 [i´so-mer]
any compound exhibiting, or capable of exhibiting, isomerism. adj., adj isomer´ic.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

i·so·mer

(ī'sō-mĕr),
1. One of two or more substances displaying isomerism, for example, l-glucose and d-glucose or citrate and isocitrate. Compare: stereoisomer.
2. One of two or more nuclides having the same atomic and mass numbers but differing in energy states for a finite period of time, for example, 99mTc and 99Tc.
[iso- + G. meros, part]
Farlex Partner Medical Dictionary © Farlex 2012

i·so·mer

(ī'sō-mĕr)
1. One of two or more substances displaying isomerism.
Compare: stereoisomer
2. One of two or more nuclides having the same atomic and mass numbers but differing in energy states for a finite period of time.
[iso- + G. meros, part]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

isomer

A chemical compound having the same number of each type of atom (same percentage composition and molecular weight) as another compound, but having different chemical or physical properties.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005

iso·mer

(ī'sō-mĕr)
1. One of two or more substances displaying isomerism.
2. One of two or more nuclides having the same atomic and mass numbers but differing in energy states for a finite period of time.
[iso- + G. meros, part]
Medical Dictionary for the Dental Professions © Farlex 2012
References in periodicals archive ?
Figure 7 shows the percentage yield of total vitamin E isomers (tocopherol and tocotrienols) in DPNR serum extracts.
The best scoring of difference binding energy calculation of alpha-Patchouli alcohol isomer COX-1 and COX-2 complexes was ligand CID442484.
Viscosity of DMSO and NMP is larger than viscosity of DMF by more than two times; therefore, one can expect delayed dynamics of isomer interconversion as a result of molecular collisions in DMSO and NMP as compared to DMF.
Open merocyanine isomers are usually characterized by low thermodynamic stability and consecutive low lifetimes due to possibility to undergo the ring closure back-reaction without additional photo activation [2, 8].
To study the mechanism of the reaction, ground states of reagents, relative stabilities of isomers and components involved in the mechanism of 3C-Ugi reaction were optimized in gas phase by DFT calculations at M062X/6-31+g(d,p) level of theory and the results for 3 starting materials (1-3), 14 intermediates and transition states (5-9) and two products (4) were summarized in Table 1.
We then repeated this process for the remaining suspect candidates with DF [greater than or equal to] 20, and we confirmed an additional two novel EOAs: Pyrocatechol and 2'-Hydroxyacetophenone (and/or its isomer 3'-Hydroxyacetophenone).
In addition, these HCA derivatives undergo isomerization to produce positional isomers such as di-acylated hydroxycinnamoyl-quinic acid derivatives like 1,3-dicaffeoylquinic acid (1,3-diCQA) or 1,5-diCQA [3-6].
The extraction recovery of cefprozil was determined at low, medium, and high QC levels (0.05, 4.1, and 12.4 [micro]g/mL for the cis isomer; 0.028, 0.445, and 1.33 [micro]g/mL for the trans isomer) in sets of six replicates by comparing the responses from plasma samples spiked before extraction with those spiked after extraction.
Octane has 18 isomers and only 2,2,4-trimethylpentane and n-octane have been studied extensively and the detailed mechanism and validation for n-octane can be found in [43, 45] and iso-octane in [25, 46, 47].
Internal limits for TCP exposure TCP 8-hour working 15 min short term Isomer day limit in ng/[m.sup.3] exposure in ng/[m.sup.3] ToCP 20000 300000 TmCP 50000 750000 TpCP 50000 750000 Table 2.