lactone

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Related to Lactones: sesquiterpene lactones, Cyclic ester

lactone

 [lak´tōn]
a cyclic organic compound in which the chain is closed by ester formation between a carboxyl and a hydroxyl group in the same molecule.

lac·tone

(lak'tōn),
An intramolecular organic anhydride formed from a hydroxyacid by the loss of water between a hydroxyl and a -COOH group; a cyclic ester.

lactone

/lac·tone/ (lak´tōn) a cyclic organic compound in which the chain is closed by ester formation between a carboxyl and a hydroxyl group in the same molecule.

lac·tone

(lak'tōn)
An intramolecular organic anhydride formed from a hydroxyacid by the loss of water between an -OH and a -COOH group; a cyclic ester.

lactone (lakˑ·tōn),

n a compound with a high molecular mass that comprises an ester linked to a ring structure of carbon atoms. Significant members of this group are coumarin and its derivatives. It is found in expressed oils and some absolutes. It has been used as an anticoagulant, sedative, and antipyretic. Harmful effects include skin allergies and potential toxicity to the nervous system.

lac·tone

(lak'tōn)
An intramolecular organic anhydride formed from a hydroxyacid by the loss of water between an -OH and a -COOH group; a cyclic ester.

lactone,

n an organic anhydride formed from a hyroxyacid by the loss of water between an 2OH and a 2COOH group.

lactone

1. an aromatic liquid from lactic acid.
2. a cyclic organic compound in which the chain is closed by ester formation between a carboxyl and a hydroxyl group in the same molecule.
References in periodicals archive ?
Alpha-beta unsaturated lactones are known as sesquiterpene lactones, and have been denoted for their allelopathic potential by inducing significant reduction in germination and growth of roots and aerial part, especially in dicots such as Arabidopsis thaliana, L.
Quorum sensing and Chromobacterium violaceum: exploitation of violacein production and inhibition for the detection of Nacylhomoserine lactones.
Because sesquiterpene lactones from Yacon leaves exhibit cytotoxic activity [9], we also assessed the cytotoxic activity of enhydrin, uvedalin and the three hydrolysates (1-3) from enhydrin against human gastric cancer cells (MGC80-3).
Olfactory persistence descriptor--The samples described as having higher olfactory persistence were richer than their paired samples in trans, czs-whisky lactone, maltol, eugenol and vanillin.
e peptide molecules which were produced by Gram positive bacteria and acyl homoserine lactone (AHL) which were produced by Gram negative bacteria [15].
Improved canine chemoprophylaxis may require combinations or sequential dosages of the macrocyclic lactones including ivermectin, moxidectin, selamectin, and milbemycin oxime; or by adding another effective antifilarial medication, such as melarsomine dihydrochloride to the prophylactic regimen.
There is at least one means to overcome lactone formation, but this comes with its own problems.
ANOVA analysis showed statistically significant differences between lactones indicating the preference to short chain than those that exhibit long-chain oxo substitutions.
Free, lactone and total acidity of honey (Electrophoretic Method), 12 ed.
They used synthetic polyesters from cyclic lactones such as glycolides, lactides, caprolactones, para-dioxanones, trimethylenecarbonates, and linear polyesters from a condensation of diols and linear diacids like hydroxyalkanoic acids.
The new product is effective against strains of parasites resistant to benzimidazoles, levamisole, macrocyclic lactones and combinations of these.