racemic


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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 ?
Pasteur traveled to Biot's laboratory and repeated his experiment, once again carefully separating the crystals of racemic acid, allowing Biot to double-check every measurement and procedure.
7) Yet, to his credit, he also seemingly thought it was wrong to test a racemic version of the product, rather than the pure chemical.
Levobupivacaine, the pure S(-)-enantiomer of racemic bupivacaine, was developed to improve the cardiac safety profile of bupivacaine.
Standard management for croup has included glucocorticoids, nebulized racemic epinephrine, humidified air, and, for patients with severe respiratory distress and impending respiratory failure, helium-oxygen mixtures.
The study, 'A Route to Enantiopure RNA Precursors from Nearly Racemic Starting Materials', has been published in Nature Chemistry.
The high-purity Ingeo M700 will be lower in cost, easier to process, and an overall better alternative to high-priced racemic lactide, as well as L-and D-lactides, in a host of industrial applications," said Dr.
Racemic and S-LA were less effective than the R-isomer that was also protective in tertiary butyl hydroperoxide (TBHP)-damaged C6 glioma.
Construction of these hydrogen-bonded dimers using racemic or quasiracemic molecular pairs effectively align reactive centers to give cyclobutane photoproducts in 61-72% yield.