Development and characterization of evening primrose (Oenothera biennis) oil nanoemulsions

AbstractEvening primrose (Oenothera biennis L., Onagraceae) seeds oil has great economic importance due to its wide industrial application, mainly for medicines and nutraceutics. However, to our knowledge, it remains almost unexplored regarding development of innovative formulations, such as nanoemulsions. On the present study, required Hydroprophile–Lipophile Balance of evening primrose seeds oil was determined (HLB 12) and a stable nanoemulsion (Day 1: mean droplet size: 214.3 ± 0.69 nm, polydispersity index: 0.253 ± 0.012. Day 7: mean droplet size: 202.8 ± 0.23 nm, polydispersity index: 0.231 ± 0.008) was achieved. Moreover, pseudo-ternary diagram allowed delimitation of nanoemulsion region, contributing to nanobiotechnology of natural products

Simultaneous extraction and obtention of a novel nano-dispersion from Mikania glomerata Spreng: Monitoring coumarin content and increasing the biological and industrial potential of a classical cultivated herb

Guaco is a traditional medicinal plant that was not previously object of studies within this area, despite its great commercial importance and crop production. To our knowledge, few efforts were carried out for a method that simultaneously extract plant material and generate nano-dispersions. Extraction of leaves with surfactant aqueous solutions allowed obtention of nano-dispersions with mean droplet size and polydispersity index below 300 nm and 0.3, respectively. Zeta potential was around – 30 mV. Chemical analysis indicated that guaco chemical marker (coumarin) was extracted. Guaco nano-dispersion was considered effective against cytotoxic effects induced by cyclophosphamide and significantly reduced micronucleated polychromatic erythrocytes frequency. Moreover, it presented improved bioactivity, when compared to guaco ethanolic extract obtained by classical method. Considering the several advantages of simultaneous extraction/nanoformulation methodology, including reducing costs and quickness of nano-dispersion preparation, the present study successfully used a simple, low-energy method and ecofriendly approach. © 2019 Elsevier B.V.Authors would like to thank CNPQ (Rede Amazônica de Pesquisa em Biofármacos – 407768/2013-0) and FAPEAP (Prodetec Araguari – process nº 250.203.035/2013) for the financial support, INCAPER (Instituto Capixaba de Pesquisa, Assistência Técnica e Extensão Rural) for the plant material and FAPES (Fundação de Amparo a Pesquisa do Espírito Santo) for the pos-graduate grant of the mastering student (first author).Peer reviewe