Data/hora: 16/06/2024 17:17:49

Biblioteca(s): 	Embrapa Agroindústria de Alimentos.	
Data corrente: 	31/12/2023	
Data da última atualização: 	17/01/2024	
Autoria: 	TORRES NETO, L.; MONTERIO, M. L. G.; MUTZ, U. DA S.; TONON, R. V.; CONTE-JUNIOR, C. A.	
Afiliação: 	LUIZ TORRES NETO, UFRJ; MARIA LUCIA GUERRA MONTEIRO, UFRJ; YHAN DA SILVA MUTZ, UFRJ; RENATA VALERIANO TONON, CTAA; CARLOS ADAM CONTE-JUNIOR, UFRJ.	
Título: 	Nanoemulsification of Essential Oil Blend by Ultrasound: Optimization of Physicochemical, Antioxidant Properties, and Activity Against Escherichia coli.	
Ano de publicação: 	2023	
Fonte/Imprenta: 	Food and Bioprocess Technology, 2023.	
DOI: 	https://doi.org/10.1007/s11947-023-03297-6	
Idioma: 	Inglês	
Notas: 	Published: 16 December 2023.	
Conteúdo: 	This study aimed to select the best conditions for producing a nanoemulsion loaded with an essential oil blend (NEOB) to achieve maximum antimicrobial and antioxidant activities. The NEOB consisted of lemongrass (Cymbopogon citratus; LEO; 60%) and thyme (Thymus vulgaris; TEO; 40%). The effect of ultrasound time exposition at 300 W (5, 18, and 30 min) and essential oil concentration (5, 11, and 20 mg/mL) on these responses was evaluated after obtaining NEOB and after an oxidation assay with UVC-LED exposure. Nanoemulsions were analyzed for their physicochemical and biological properties. Overall, droplet size, zeta potential, minimum inhibitory concentrations (MIC) against Escherichia coli, DPPH free radical scavenging activity, and ferric-reducing antioxidant power were affected by essential oil concentration and/or ultrasound time exposition in a non-linear fashion. The NEOB (average size, 68.88 ± 2.84 nm) with 20.5 mg/mL of essential oil and sonicated for 35.7 min achieved the highest anti-E. coli (MIC, 0.44 mg/mL) and antioxidant activity (FRAP, 1.17 μmol TROLOX equivalent/g), remaining stable even after high UVC-LED doses (6.41 J/cm2 exposure, p < 0.05). This study reveals the promising potential of NEOB obtained from ultrasound for sustainable industrial applications.	
Palavras-Chave: 	CCRD; Desirability function; FRAP; Nanoemulsão; Ultraviolet light-emitting diode.	
Thesagro: 	Óleo Essencial.	
Thesaurus Nal: 	Essential oils; Nanoemulsions.	
Categoria do assunto: 	X Pesquisa, Tecnologia e Engenharia	
Registro original: 	Embrapa Agroindústria de Alimentos (CTAA)	
Exemplares: 	CTAA - (15644-1) - UPC - AP - DD -  -  -  - DIS