16:00 - 18:00
Room: Poster Area - Poster Shed
Poster Presentation
Medicinal and Aromatic Plants by-products: Wastes or High-added value products with antioxidant properties?
Evanthia Ntina, Eleftheria-Evangelia Arapi, Spyros Economou, Antigoni Cheilari, Nikolas Fokialakis, Nektarios Aligiannis
Department of Pharmacognosy and Natural Products Chemistry, Faculty of Pharmacy, National and Kapodistrian University of Athens, Athens

Southeastern European region is known for its rich biodiversity, especially in medicinal and aromatic plants (MAPs). Annually, significant quantities of cultivated and harvested wild MAPs are subjected to several processes to obtain essential oils and their commercially exploitable parts, yet resulting to a huge amount of by-products, such as herbal residues or hydrolats. As part of our research work, a systematic effort has been made over the last decade to exploit MAPs’ by-products for the development of novel pharmaceuticals and food supplements. Hence, within the framework of the European project “EXANDAS”, the production of bioactive extracts from Rose (Rosa damascena) and Lemon verbena (Aloysia citrodora) by-products has been investigated.

In more details, during the production of rose oil by hydrodistillation, significant amounts of waste water are produced and discarded in the fields. In this study, samples from different distillation apparatuses and production days were collected and processed with macroporous adsorption resin XAD-4 to produce enriched phenolic extracts with remarkable antioxidant activity. The most active extract was further studied using FCPC chromatography resulting to the identification of kaempferol and quercetin glucosides using NMR with LC-MS techniques. Furthermore, raw material of lower quality Lemon verbena leaves, obtained during herbal processing, was used to produce bioactive extracts. PLE was elaborated to maximise the content of acteoside, a phenylpropanoid glycoside with antioxidant and cytoprotective properties [1], through the optimisation of the extraction process in terms of temperature, ethanol-water ratio and extraction cycles.

All extracts obtained from Rosa damascena and Aloysia citrodora by-products demonstrated high Total Phenolic Content (Folin-Ciocalteu method) and antioxidant potential (DPPH/ABTS assays), proving to become a readily available source of bioactive compounds for health nutrition and cosmetic industries.

[1] Li X, et al. Molecules 2018; 23(2): 498;


Reference:
Poster session-PO-48:
Session:
Poster Presentation-2
Presenter/s:
Evanthia Ntina
Presentation type:
Poster presentation
Room:
Poster Area - Poster Shed
Date:
Tuesday, 28th August, 2018
Time:
16:00 - 18:00
Session times:
16:00 - 18:00