| slovo | definícia |
Coumarin
(gcide) | Coumarin \Cou"ma*rin\ (k[=oo]"m[.a]*r[i^]n), n. [F., fr.
coumarou, a tree of Guiana.] (Chem.)
The concrete essence of the tonka bean, the fruit of
Dipterix (formerly Coumarouna) odorata and consisting
essentially of coumarin proper, which is a white crystalline
substance, C9H6O2, of vanilla-like odor, regarded as an
anhydride of coumaric acid, and used in flavoring. Coumarin
in also made artificially.
[1913 Webster] |
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hydroxy-coumarin
(gcide) | Umbelliferone \Um`bel*lif"er*one\, n. (Chem.)
A tasteless white crystalline substance, C9H6O3, found in
the bark of a certain plant (Daphne Mezereum), and also
obtained by the distillation of certain gums from the
Umbelliferae, as galbanum, asafetida, etc. It is analogous
to coumarin. Called also hydroxy-coumarin. Its strong
fluorescence under ultraviolet light makes it useful in
analytical biochemistry, as, for example, to detect
phosphatase activity by hydrolysis of umbelliferyl phosphate.
[1913 Webster +PJC] |
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