racemic

(redirected from Racemic mixture)
Also found in: Dictionary, Encyclopedia, Wikipedia.
Related to Racemic mixture: chirality, racemic epinephrine, Diastereomers

racemic

 [ra-se´mik]
optically inactive, being composed of equal amounts of dextrorotatory and levorotatory isomers.

ra·ce·mic (r),

(rā-sē'mik, -sem'ik),
Denoting a mixture of optically active compounds that is itself optically inactive, being composed of an equal number of dextro- and levorotatory substances, which are separable. Those compounds chracterized by two or more chiral centers and internal compensation (for example, an internal line of symmetry), and are therefore not separable into d or l (or + and -) forms, receive the prefix meso-) (for example, meso-cystine).

racemic

/ra·ce·mic/ (ra-se´mik) optically inactive, being composed of equal amounts of dextrorotatory and levorotatory isomers.

racemic

[rāsē′mik]
Etymology: L, racemus, bunch of grapes
pertaining to a compound made up of equal amounts of dextrorotatory and levorotatory isomers, rendering it optically inactive under polarized light.

ra·ce·mic

(rā-sē'mik)
Denoting a mixture of optically active compounds that is itself optically inactive, being composed of an equal number of dextrorotatory and levorotatory substances, which are separable.

racemic(rā·sēˑ·mik),

n a combination of both levorotatory and dextrorotatory isomers in an optically active substance. See also dextrorotatory and levorotatory.

ra·ce·mic

(rā-sē'mik)
Denoting mixture of compounds that is itself optically inactive, being composed of an equal number of dextrorotatory and levorotatory substances.

racemic (rāsē´mik),

adj referring to a mixture of equal quantities of the dextro- and levo-isomers of a compound.

racemic

optically inactive, being composed of equal amounts of dextrorotatory and levorotatory isomers.
References in periodicals archive ?
Moreover, he found that a PHOSITA had no way of knowing what the properties of the d-enantiomer and its salts would be without testing the individual combinations; therefore, the beneficial properties of clopidogrel were not known before the racemic mixture was separated into its enantiomers.
As shown in Figure 7A, both the racemic mixture and the enantiomers of the organochlorinated compound o,p'-DDT were effective at inducing luciferase activity.
As temperature increases, ordinary chemical reactions tend to generate equal proportions of the two isomers, producing so-called racemic mixtures.
A recent study in rats found that, unlike escitalopram and citalopram, injections of the R-isomer of citalopram (R-citalopram) did not block serotonin reuptake at all, raising the question of whether the Risomer blocks some of the effects of the S-isomer m the racemic mixture or citalopram, leaving citalopram less potent than escitalopram.
Biological studies of ABA action are commonly carried out using the synthetic racemic mixture because of its relatively lower cost and ready availability.
Levotofisopam is the S-entantiomer of the racemic mixture RS-tofisopam, a well tolerated, effective, nonsedating agent used for the treatment of a variety of disorders associated with stress or autonomic instability.
Synthetic vitamin E exists as a racemic mixture of d,l- isomers rather than just the d- form that occurs in natural vitamin E.
Citalopram, a selective serotonin reuptake inhibitor (SSRI), is actually a racemic mixture of two enantiomers--molecules that have the same atomic framework but different spatial arrangements that change their interaction with receptors.
The peak representing the racemic mixture of D,L-octanoylcarnitine was clearly lower than that of L-octanoylcarnitine alone.
All the clinical work has been done with the racemic mixture of the two isoforms of gossypol.