ÓLEOS ESSENCIAIS DE CITRONELA (Cymbopogon nardus L.) Rendle - (POACEAE): COMPOSIÇÃO, ATIVIDADES ANTIOXIDANTE E ANTIBACTERIANA

• DOI: 10.22533/at.ed.8512014025

• Palavras-chave: Concentração inibitória mínima; Compostos secundários; Compostos bioativos.

• Keywords: Minimum Inhibitory Concentration; secondary compounds; bioactive compounds.

• Abstract:

  Essential oils can be used in the food industry, drinks and cosmetics to

  prevent or reduce lipid deterioration and contamination by microorganisms. The aims

  of this study were to evaluate the physical-chemical composition, the antioxidant and

  antibacterial activities of the citronella (Cymbopogon nardus). The tests were performed

  in the microbiology laboratory of the Federal Institute of Education, Science and

  Technology of the Triângulo Mineiro, on the campus of Uberaba-MG, in partnership with

  the laboratories of quality control of Laborphys Physical-chemical and microbiological

  analysis and Luvik of Brazil. Samples were collected from four manufacturers in Brazil.

  The parameters of the physical-chemical analyzes and chromatography, color, density,

  refraction index, acidity index and sulphated ash were conducted according to the

  methodology of the Adolfo Lutz Institute, 2008. The antioxidant activity was performed

  by using the methods of reducing free radical DPPH● according to the methodologies

  of Sousa et al. (2007) and Lopes-Lutz et al. (2008) with some modifications and the

  test of oxidation of the system β-carotene/linoleic acid was performed according to the

  methodologies of Kulisic et al. (2004) and Lopes-Lutz et al. (2008). The antibacterial

  activity was according to the methodology of Clinical and Laboratory Standards

  Institute, 2012, document M07-A9. The standard strains were Enterobacter aerogenes

  ATCC 13,048, Escherichia coli ATCC 25,922, Salmonella enteritidis ATCC 13,076,

  Staphylococcus aureus ATCC 25,923, Bacillus cereus ATCC 11,778, Pectobacterium

  spp. (UFU-C8), Pantoea ananatis (UFU-D14), Xanthomonas campestris PV. campestris

  and Pseudomonas aeruginosa (ATCC 9,027). In the chromatographic analyzes, the

  majority constituents found in essential oils of C. nardus, were the citronellal (22.161%

  to 77.806%) and geraniol (0.061% to 28.506%). The parameters such as color and

  refraction index were in accordance with the the British Pharmacopoeia. Relative

  density, acidity index and sulfated ash were found within manufacturers’ specifications.

  The samples presented antioxidant and antibacterial activities against Gram positive

  and Gram negatives bacteria that were tested.

• Número de páginas: 18