laevuloselevulosen.
/ˈliːvjᵿləʊs/, /ˈliːvjᵿləʊz/, /ˈlɛvjᵿləʊs/, /ˈlɛvjᵿləʊz/, U.S. /ˈlɛvjəˌloʊs/, /ˈlɛvjəˌloʊz/ Chemistry.
Formerly, the form of glucose n. which is lævo-rotatory to polarized light; now, the naturally occurring (lævo-rotatory) form of fructose, d(—)-fructose. (Cf. dextrose n.)
ΚΠ
1866 H. E. Roscoe Lessons Elem. Chem. xxxvii. 325 Dextrose..is found in many kinds ofo fruit, in manna and honey mixed with levulose, or left-handed glucose.
1878 C. T. Kingzett Animal Chem. 404 Cane sugar is first resolved into dextrose and lævulose before it ferments.
1897 T. C. Allbutt et al. Syst. Med. III. 386 Cane sugar is partly left unchanged, partly converted into glucose and lævulose.
1902 Encycl. Brit. XXII. 721/1 Glucose and fructose (lævulose)—the two isomeric hexases of the formula C6H12O6 which are formed on hydrolysing cane sugar.
1948 W. Pigman Chem. Carbohydrates xv. 605 Hydrolysis of inulin by enzymes leads to a practically quantitative yield of levulose ( d-fructose).
1974 Nature 10 May 194/3 Although it is true that some bacteriologists are extremely conservative in the names they use for carbohydrates, surely nobody now uses ‘levulose’..in preference to ‘fructose’ these days.
Derivatives
laevulosane n. [+ -ane suffix2] Obsolete variant of laevulosan n.
ΚΠ
1876 J. Harley Royle's Man. Materia Med. (ed. 6) 792 Heated to 338° lævulose loses water and is converted into lævulosane.
This entry has not yet been fully updated (first published 1901; most recently modified version published online March 2022).
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n.1866