chirality


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chirality

 [ki-ral´ĭ-te]
the property of handedness, of not being superimposable on a mirror image; the handedness of an asymmetric molecule, as specified by its optical rotation or absolute configuration.

chi·ral·i·ty

(kī-ral'i-tē),
The property of nonidentity of an object with its mirror image; used in chemistry with respect to stereochemical isomers.
[G. cheir, hand]

chirality

(kī-răl′ĭ-tē)
n.
The aspect of a structure or property, such as the configuration of a molecule or the spin of a particle, that renders that structure or property distinguishable from its mirror image or symmetrical opposite. Also called handedness.

chirality

The left- or right-sidedness of virtually the entirety of the physical universe, from elementary particles—e.g., electrons and molecules—to highly complex organisms
Organic chemistry The 3-D conformation of a molecule, which has an either left-handed (levo- or l-) orientation, as do most molecules in functioning biologic systems, or right-handed (dextro- or d-) orientation

chi·ral·i·ty

(kī-ral'i-tē)
The property of nonidentity of an object with its mirror image; used in chemistry with respect to stereochemical isomers.
[G. cheir, hand]

chirality

The state of two molecules having identical structure except that they display ‘handedness’ (as in the right and left hand) and are mirror images of one another. Such pairs of molecules are also known as enantiomers or optical isomers. When dissolved in a fluid they rotate a plane-polarized beam in opposite directions.

chirality

(of STEREOISOMERS) the property of ‘handedness’ (right- or left-handedness) of a molecule, such that the mirror image cannot coincide exactly with the actual image.

chirality (kī·ralˑ·i·tē),

n the “handedness” property of organic compounds (containing an asymmetrical carbon) that gives rise to structures that are mirror images and that cannot be superimposed on each other; the two isomers are called optical isomers, which refers to their ability to rotate plane-polarized light.
References in periodicals archive ?
Dr Rushforth said: "We didn't set out to switch the chirality of the domain walls.
This experience showed us how the chiral separation by HPLC is valuable and of importance not only for the basic research on chirality, but also for the development of practically useful chiral compounds, such as pharmaceuticals and pesticides, and encouraged us to make further advances using this new chiral separation method.
Limiting cases of permittivity, with value of chirality fixed to zero, are also taken into account and their interpretation given.
These results can give a more profound understanding on chirality and to offer flexibility in the investigation of novel terahertz device.
In 1998, the Food and Drug Administration mandated that chirality must be considered in the development of new drugs.
Chirality is typically described by a relationship between unit vector indices, which measure the spacing between carbon atoms in two directions on the sidewall.
The chirality context drives the way the real differential of a map may be written as the sum of two parts which, roughly speaking, behave as the real and the imaginary part of a quaternion: the composition of maps is shown to have exactly the same algebraic structure as the product of quarternions.
I have followed technology for a long time and watched the promise delivered on proteomics, genomics, stem cells, chirality, room temperature superconductors, shape memory alloys, polymers, and nanoparticle everything.
Pasteur's first important work was a demonstration of the chirality of tartaric acid.
Among the topics are valence photoelectronic circular dichroism of gas phase enantiomers, the infrared and Raman detection of transient chirality recognition in the gas phase with ethanol as a case study, enantioselectivity in gas-phase ion-molecule reactions, equilibrium methods, deoxy oligonucliotides as chiral references for discriminating enantiomeric amino acids under mass spectrometry, solution-phase versus gas-phase chiral recognition by electrospray ionization mass spectrometry with a case study of two chiral selector classes.
The four kinds of things that belong to a property set can be described according to four sub-patterns: complimentarity, similarity, chirality and polarity.