the conversion of an optically active substance into a racemic form
racemization in American English
(ˌræsəməˈzeiʃən, reiˈsimə-)
noun
Chemistry
the conversion of an optically active substance into an optically inactive mixture of equal amounts of the dextrorotatory and levorotatory forms
Word origin
[1890–95; raceme + -ization]This word is first recorded in the period 1890–95. Other words that entered Englishat around the same time include: bootstrap, cholesterol, neoclassicism, phoneme, wireless-ization is used to form nouns from verbs ending in -ize (organization). Other words that use the affix -ization include: arborization, cephalization, posterization, sterilization, vaporization
Examples of 'racemization' in a sentence
racemization
These results suggest that the racemization mechanism occurs via a non-polar diradical structure.
Masashi Hasegawa, Seiya Iwata, Yasuto Sone, Junta Endo, Hideyo Matsuzawa, YasuhiroMazaki 2014, 'Chiroptical Properties and the Racemization of Pyrene and Tetrathiafulvalene-SubstitutedAllene: Substitution and Solvent Effects on Racemization in Tetrathiafulvalenylallene',Moleculeshttp://www.mdpi.com/1420-3049/19/3/2829. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
One of them shows that an unexpected racemization has occurred during the mild-condition methylation reaction.
Thais C. M. Noguiera, Alessandra C. Pinheiro, James L. Wardell, Marcus V. N. de Souza,Jordan P. Abberley, William T. A. Harrison 2015, 'Different hydrogen-bonded chains in the crystal structures of three alkyl N-[(E)-1-(2-benzylidene-1-methylhydrazinyl)-3-hydroxy-1-oxopropan-2-yl]carbamates',Acta Crystallographica Section E: Crystallographic Communicationshttp://scripts.iucr.org/cgi-bin/paper?S2056989015010440. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
The annual-temperature variation inside sediment was negligible, which contributed to amino acid racemization dating.
Cobo, R., Ortiz, J. E., Torres, T. 2003, 'Features of deep cave sediments: their influence on fossil preservation', Estudios Geologicoshttp://estudiosgeol.revistas.csic.es/index.php/estudiosgeol/article/view/98/94. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
Racemization of collagen 1 could therefore influence lung function and contribute to pulmonary diseases.
Akiko Kasai, Naomi Yamashita, Naoko Utsunomiya-Tate 2010, 'Collagen Racemization and Deposition in the Lungs of Aged Rats', Biochemistry Insightshttp://la-press.com/collagen-racemization-and-deposition-in-the-lungs-of-aged-rats-a1915. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
The degree of racemization was useful for the identification of the type of hydrolysis used during production (chemical or enzymatic).
Luciano Cavani, Alja Margon, Luigi Sciubba, Claudio Ciavatta, Claudio Marzadori 2017, 'What we talk about when we talk about protein hydrolyzate-based biostimulants', AIMS Agriculture and Foodhttp://www.aimspress.com/agriculture/article/1525/fulltext.html. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
The racemization kinetics and the thermodynamic parameters of racemization were studied in several different organic solvents.
Chao Xiao, Wenting Liang, Wanhua Wu, Kuppusamy Kanagaraj, Yafen Yang, Ke Wen, ChengYang 2019, 'Resolution and Racemization of a Planar-Chiral A1/A2-Disubstituted Pillar[5]arene',Symmetryhttps://www.mdpi.com/2073-8994/11/6/773. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
Mild racemization was observed in polar solvents, whereas a relatively fast rate was obtained in less polar solvents.
Masashi Hasegawa, Seiya Iwata, Yasuto Sone, Junta Endo, Hideyo Matsuzawa, YasuhiroMazaki 2014, 'Chiroptical Properties and the Racemization of Pyrene and Tetrathiafulvalene-SubstitutedAllene: Substitution and Solvent Effects on Racemization in Tetrathiafulvalenylallene',Moleculeshttp://www.mdpi.com/1420-3049/19/3/2829. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
Step one consisted of dihydrothymine racemization.
M. V. C. B. Cortes, R. R. Menezes, E.G. Oestreicher 2015, 'ENANTIOPURE R(-)-3-AMINOISOBUTYRIC ACID SYNTHESIS USING Pseudomonas aeruginosa ASENANTIOSPECIFIC BIOCATALYST', Brazilian Journal of Chemical Engineeringhttp://www.scielo.br/scielo.php?script=sci_arttext&pid=S0104-66322015000100053&lng=en&tlng=en. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)