Banca de QUALIFICAÇÃO: EDUARDO DE SOUZA ARAUJO

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
DISCENTE : EDUARDO DE SOUZA ARAUJO
DATA : 25/10/2017
HORA: 08:00
LOCAL: Sala 02 PPGCFL - EAJ
TÍTULO:

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

PALAVRAS-CHAVES:

Alternative antimicrobials, Pathogenic microoganisms, Slow pyrolysis, Pyroligenous acid

PÁGINAS: 30
GRANDE ÁREA: Ciências Agrárias
ÁREA: Recursos Florestais e Engenharia Florestal
SUBÁREA: Energia de Biomassa Florestal
RESUMO:

The present work aimed to evaluate the antibacterial and antifungal activity of two types of pyroligneous acid (PA) obtained from slow pyrolysis of wood of Mimosa tenuiflora and of a hybrid of Eucalyptus urophylla x Eucalyptus grandis. Wood wedges were carbonized on a heating rate of 1.25°C/min until 450°C. Pyrolysis smoke was trapped and condensed to yield liquid products. Crude pyrolysis liquids were bi-distilled 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 by using agar diffusion test. Two yeasts were evaluated as well, Candida albicans (ATCC 10231) and Cryptococcus neoformans. GC-MS analysis of both PA’s was carried out in order 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 to 25 mm of diameter. All microorganisms were inhibited by both types of PA even in the lowest concentration of 20%. The feasibility the usage of PAs produced with wood species planted in large scale in Brazil was evident and the real potential as a basis to produce natural antibacterial and antifungal agents, with real possibility to be used in veterinary and zootechnical applications.

MEMBROS DA BANCA:
Presidente - 1079298 - ALEXANDRE SANTOS PIMENTA
Interno - 1880266 - ROSIMEIRE CAVALCANTE DOS SANTOS
Interno - 2326526 - TATIANE KELLY BARBOSA DE AZEVEDO CARNAVAL