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 ?
At room temperature, the product became a racemic mixture.
The peak representing the racemic mixture of D,L-octanoylcarnitine was clearly lower than that of L-octanoylcarnitine alone.
The use of a racemic mixture of octanoylcarnitine for standardization would produce an overestimation of the concentration of octanoylcarnitine in routine blood specimen analyses.
After the synthesis of suitable candidate compounds, we will apply them in the following research areas: a) the resolution of racemic mixtures by co-crystallization with chiral halogen-bond donors, and b) the use of these Lewis acids in enantioselective organocatalysis.
Our research is focused on membrane separation processes [10-18] and, as a further challenge, on the separation of single enantiomers from their racemic mixtures.
They ensure that students receive sufficient information on such topics as chemical bonding in drug-receptor reactions, isomerism, resolution of racemic mixtures, hydrocarbons, nucleic acids, free radicals and a full consideration of carbohydrates, steroids, and alkaloids.
Chiral columns, which are used with SFC and HPLC, are packed with media that separates enantiomers from racemic mixtures, thus yielding a chirally pure substance.
1,3) All marketed albuterol preparations, except levalbuterol, are racemic mixtures, composed of a 50:50 ratio of (R)-isomer and (S)-isomer of albuterol.
In addition, all 3 compounds were found to be present in the sample as racemic mixtures.
0, the theoretical value ratio for racemic mixtures, for all sampling times (P <0.
All other currently available albuterol bronchodilators are 50/50 racemic mixtures, containing both R- and S-isomers.