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  • Title: Anti-Salmonella activity of alkyl gallates.
    Author: Kubo I, Fujita K, Nihei K.
    Journal: J Agric Food Chem; 2002 Nov 06; 50(23):6692-6. PubMed ID: 12405763.
    Abstract:
    A series of alkyl gallates (3,4,5-trihydroxybenzoates) was synthesized and tested for their antibacterial activity against Salmonella choleraesuis. Nonyl (C(9)) and octyl (C(8)) gallates were noted to be the most effective against this food-borne bacterium, each with a minimum bactericidal concentration (MBC) of 12.5 microg/mL, followed by decyl (C(10)) gallate, with a MBC of 25 microg/mL. Dodecyl (C(12)) gallate exhibited activity against S. choleraesuis, with a MBC of 50 microg/mL. Propyl (C(3)) gallate showed no activity against S. choleraesuis up to 3200 microg/mL. The length of the alkyl group is not a major contributor but plays a role in eliciting the activity to a large extent. The same series of alkyl gallates, regardless of alkyl chain length, all showed nearly the same potent scavenging activity on the 1,1-diphenyl-2-picrylhydrazyl radical, indicating that the length of the alkyl group is not associated with the activity.
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