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Mutarotation

[mytarɔtasjɔ̃]

Dernière mise à jour le 5 avril 2024 - - Nous soutenir

Définitions de « mutarotation »

(Stéréochimie) Changement du pouvoir rotatoire d'une solution due à une épimérisation spontanée ou catalysée.

La mutarotation, avec son fascinant changement du pouvoir rotatoire d'une solution suite à une épimérisation spontanée ou catalysée, est un véritable ballet moléculaire invisible à l'œil nu.
— (Citation fictive)

Variation du pouvoir rotatoire d'une solution résultant d'une épimérisation spontanée ou sous l'influence d'un catalyseur.

It was found that rate constant of speed variation of optical rotate for L-galactose was two times smaller than for D- galactose with small content of deuterium despite the concentration. While in heavy water first order mutarotation for L-galactose was not noticed.
Water under low deuterium concentrations proved to be useful for medicine
To the best of our knowledge, this is the first report demonstrating that the mutarotation effect of non-equilibrium α/β-d-glucose solutions can be measured in vivo in brain tissue. This principle could be utilized to conduct in vivo whole brain studies without the need for ionizing radiation. Since crystalline α-d-glucose costs considerably less than 18F-fluorodeoxyglucose, 13C and 2H, a cheaper and radiation-free tracer would be available for large scale in vivo studies of glucose metabolism in the brain. This could enable long-term longitudinal observational studies over the entire lifespan with no risk of radiation exposure.
Nature — α-D-Glucose as a non-radioactive MRS tracer for metabolic studies of the brain | Scientific Reports

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