Antibacterial and antifungal activities of pyroligneous acid from wood of Eucalyptus urograndis and Mimosa tenuiflora

Journal of Applied Microbiology
E de Souza AraújoK M G de Lima

Abstract

This work aimed to evaluate the antibacterial and antifungal activities of two types of pyroligneous acid (PA) obtained from slow pyrolysis of wood of Mimosa tenuiflora and of a hybrid of Eucalyptus urophylla × Eucalyptus grandis. Wood wedges were carbonized on a heating rate of 1·25°C min-1 until 450°C. Pyrolysis smoke was trapped and condensed to yield liquid products. Crude pyrolysis liquids were bidistilled under 5 mmHg vacuum yielding purified PA. Multi-antibiotic-resistant strains of Escherichia coli, Pseudomonas aeruginosa (ATCC 27853) and Staphylococcus aureus (ATCC 25923) had their sensitivity to PA evaluated using agar diffusion test. Two yeasts were evaluated as well, Candida albicans (ATCC 10231) and Cryptococcus neoformans. GC-MS analysis of both PAs was carried out to obtain their chemical composition. Regression analysis was performed, and models were adjusted, with diameter of inhibition halos and PA concentration (100, 50 and 20%) as parameters. Identity of regression models and equality of parameters in polynomial orthogonal equations were verified. Inhibition halos were observed in the range 15-25 mm of diameter. All micro-organisms were inhibited by both types of PA even in the lowest concentration of 20%. T...Continue Reading

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Citations

Dec 21, 2020·Journal of Applied Microbiology·W N C SoaresF M C Feijó
Apr 23, 2021·Archives of Microbiology·Thaís L Ferreira, Antonio J J Evangelista
May 30, 2021·Scientific Reports·Aaron Martínez-HigueraRamón Iñiguez-Palomares
Jul 25, 2021·International Journal of Molecular Sciences·Ismat MajeedLuigi Geo Marceanu
Aug 11, 2021·Plants·Raluca-Maria PârliciVlad Stoian
Jun 28, 2019·Journal of Natural Products·Marcelo J Dias SilvaFrancisco A Macías
Sep 3, 2021·Journal of Applied Microbiology·Lúcio C D Medeiros, Luiz H S Gasparotto
Sep 11, 2021·Journal of Applied Microbiology·Alexandre Santos Pimenta

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