Definition of racemic in English:

racemic

adjective rəˈsɛmɪkrəˈsiːmɪk

Chemistry

Composed of dextrorotatory and laevorotatory forms of a compound in equal proportion.
〔化〕外消旋的；外消旋化合物的
Example sentencesExamples
- It has developed a new process to separate racemic epoxides by hydrolysis.
- Phenylpropanolamine, a racemic mixture of norephedrine esters, causes a release of norepinephrine throughout the body and stimulates hypothalamic adrenoreceptors to reduce appetite.
- It has an asymmetric carbon atom and therefore has levo and dextro isomers but is supplied as a racemic mixture for anesthetic use.
- Louis Pasteur performed the first enantiomeric resolution in 1848 while studying crystals of a salt of racemic tartaric acid.
- The chemical structure of the natural form of ephedrine is levorotatory, while the synthetic ephedrine is a racemic mixture.

Derivatives

racemize

verb ˈrasɪmʌɪz

Chemistry

Change into a racemic form.
no object leucine and aspartic acid racemize at different rates
Example sentencesExamples
- with object heating tends to racemize all the amino acids
- Accordingly, the extent of racemization in the total acid hydrolysate would be weighted by the degree of racemization of the remaining higher molecular weight, less racemized amino acid residues.

Origin

Early 19th century (in racemic acid): from French racémique 'derived from grape juice' (originally referring to tartaric acid in this) + -ic.

Definition of racemic in US English:

racemic

adjective

Chemistry

Composed of dextrorotatory and levorotatory forms of a compound in equal proportion.
〔化〕外消旋的；外消旋化合物的
Example sentencesExamples
- It has developed a new process to separate racemic epoxides by hydrolysis.
- The chemical structure of the natural form of ephedrine is levorotatory, while the synthetic ephedrine is a racemic mixture.
- It has an asymmetric carbon atom and therefore has levo and dextro isomers but is supplied as a racemic mixture for anesthetic use.
- Louis Pasteur performed the first enantiomeric resolution in 1848 while studying crystals of a salt of racemic tartaric acid.
- Phenylpropanolamine, a racemic mixture of norephedrine esters, causes a release of norepinephrine throughout the body and stimulates hypothalamic adrenoreceptors to reduce appetite.

Origin

Early 19th century (in racemic acid): from French racémique ‘derived from grape juice’ (originally referring to tartaric acid in this) + -ic.

词汇	racemic
释义	Definition of racemic in English: racemic adjective rəˈsɛmɪkrəˈsiːmɪk Chemistry Composed of dextrorotatory and laevorotatory forms of a compound in equal proportion. 〔化〕外消旋的；外消旋化合物的 Example sentencesExamples It has developed a new process to separate racemic epoxides by hydrolysis. Phenylpropanolamine, a racemic mixture of norephedrine esters, causes a release of norepinephrine throughout the body and stimulates hypothalamic adrenoreceptors to reduce appetite. It has an asymmetric carbon atom and therefore has levo and dextro isomers but is supplied as a racemic mixture for anesthetic use. Louis Pasteur performed the first enantiomeric resolution in 1848 while studying crystals of a salt of racemic tartaric acid. The chemical structure of the natural form of ephedrine is levorotatory, while the synthetic ephedrine is a racemic mixture. Derivatives racemize verb ˈrasɪmʌɪz Chemistry Change into a racemic form. no object leucine and aspartic acid racemize at different rates Example sentencesExamples with object heating tends to racemize all the amino acids Accordingly, the extent of racemization in the total acid hydrolysate would be weighted by the degree of racemization of the remaining higher molecular weight, less racemized amino acid residues. Origin Early 19th century (in racemic acid): from French racémique 'derived from grape juice' (originally referring to tartaric acid in this) + -ic. Definition of racemic in US English: racemic adjective Chemistry Composed of dextrorotatory and levorotatory forms of a compound in equal proportion. 〔化〕外消旋的；外消旋化合物的 Example sentencesExamples It has developed a new process to separate racemic epoxides by hydrolysis. The chemical structure of the natural form of ephedrine is levorotatory, while the synthetic ephedrine is a racemic mixture. It has an asymmetric carbon atom and therefore has levo and dextro isomers but is supplied as a racemic mixture for anesthetic use. Louis Pasteur performed the first enantiomeric resolution in 1848 while studying crystals of a salt of racemic tartaric acid. Phenylpropanolamine, a racemic mixture of norephedrine esters, causes a release of norepinephrine throughout the body and stimulates hypothalamic adrenoreceptors to reduce appetite. Origin Early 19th century (in racemic acid): from French racémique ‘derived from grape juice’ (originally referring to tartaric acid in this) + -ic.
随便看	Narayanganj Narayan, R. K. narayan, r k Narbonne narc narceine narcism narcisms narcissi narcissine narcissism narcissist narcissist narcissistic narcissistic narcissistically narcissistically narcissistic personali... narcissistic personali narcissists narcissus narcissus narcissus complex narcissuses narcissus-flowered ane...