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mutarotation

Pronunciation: myu'ta-ro-ta'shun

Definition: The process of changing specific rotation at a given wavelength; a solution of a-d-glucose recrystallized from its solution in acetic acid and freshly dissolved in water gives a rotation of [a] = +112.2°, but when recrystallized from a boiling aqueous solution (as the ß-form) it shows an initial rotation of [a] = +18.7°; either solution, on standing, slowly changes its specific rotation to a value of [a] = +52.7°, indicating a mixture of the two anomeric forms of d-glucose.

Synonym(s): birotation, multirotation

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© Copyright 2017 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.
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