Antifungal and physicochemical properties of Ocimum essential oil loaded in poly(lactic acid) nanofibers |
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| Authors: | Rafaela Magalhães Brandão Maria das Graças Cardoso Luís Roberto Batista Alex Rodrigues Silva Caetano Ana Carolina Cortez Lemos Maria Alice Martins David Lee Nelson Juliano Elvis De Oliveira |
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| Affiliation: | 1. Chemistry Department, Federal University of Lavras (UFLA), Lavras, MG, Brazil;2. Food Sciences Department, Federal University of Lavras (UFLA), Lavras, MG, Brazil;3. Engineering Department, Federal University of Lavras (UFLA), Lavras, MG, Brazil;4. Embrapa Instrumentation, São Carlos, SP, Brazil;5. Postgraduate Program in Biofuels, Federal University of the Jequitinhonha and Mucuri Valleys, Diamantina, MG, Brazil |
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| Abstract: | Poly(lactic acid) (PLA) nanofibres containing different proportions of the essential oils from Ocimum basilicum L. and Ocimum gratissimum L. were prepared by solution blow spinning method. The essential oils were extracted by hydrodistillation and characterized by gas chromatography. MEV, contact angle, DSC and FTIR were used to characterize the nanofibres. The effect of bioative nanofibres on the growth of the fungus and on the production of ochratoxin A were evaluated using the fumigation test. Linalool, 1·8-cineole and camphor were the principal components of the essential oil from O. basilicum, and eugenol was the principal constituent in the oil from O. gratissimum. An increase in the average diameter of the nanofibres was observed with the addition of the essential oils. The essential oils acted as a plasticizer, resulting in a reduction in the crystallinity of the PLA. The encapsulation of essential oils in PLA nanofibres was verified by FTIR. An effective antifungal and antimicotoxygenic activity against Aspergillus ochraceus and Aspergillus westerdjikiae was observed for the bioative nanofibres. These results confirm the potential of PLA nanofibres containing the essential oils for the control of toxigenic fungi that cause the deterioration of food and are harmful to human health. |
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| Keywords: | Aspergillus ochraceus Aspergillus westerdijkiae Ocimum basilicum Ocimum gratissimum ochratoxin A solution blow spinning |
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