racemic

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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 ?
80) the court found that the patented dextrorotatory isomer (81) was not obvious in light of the known racemic mixture.
held that the anticipation argument failed because the genus patent only disclosed the existence of enantiomers generally; there was no specific disclosure of enantiomers of the racemic mixture of clopidogrel, nor was there disclosure of how to separate the enantiomers.
Another retrospective chart review described 8 patients with iatrogenic sedation or depression who received adjunctive methylphenidate, mean 20 to 40 mg/d, or a racemic mixture of amphetamine salts, mean 20 to 40 mg/d.
In the late 1920s and early 1930s, both preparations became available to clinicians, Kendall's L-thyroxine crystallized from thyroid glands obtained at slaughter houses; and Harrington synthetic racemic mixture.
5 mg racemic albuterol and 70% with 5 mg of the racemic mixture.
It is a pure dextro isomer rather than the racemic mixture seen in Ritalin and other methylphenidate products.
We studied two poorly characterized compounds present in the environment, tris-4-(chlorophenyl)methane (Tris-H) and tris4-(chlorophenyl)methanol (Tris-OH), and compared their activities to the organochlorinated pesticide o,p'-DDT (the racemic mixture and both enantiomers) and a mixture of nonylphenols (NPm; released from polystyrene), which have already been identified to have estrogenic activity.
The results showed that the NLO properties of plastic made with the one-handed IBP monomers were four times as stable as those of the same polycarbonate system made using the racemic mixture.
The painkiller ibuprofen is normally marketed as a racemic mixture of isomers.
Since its introduction 40 years ago, warfarin, a racemic mixture of two stereoisomers, has been used extensively to treat thromboembolic disorders.
At room temperature, the product became a racemic mixture.