## 2 Materials and Methods  
Semi-crystalline polylactide (PLA) was provided from Shenzhen Esun Industrial Co., Ltd. (Shenzhen, China), characterized by a number-average molecular weight Mn of 60,520 g/mol, a weight-average molecular weight Mw of 160,780 g/mol, and polydispersity index (PDI) of 2.66. Poly(vinyl-pyrrolidone) (PVP) with weight-average molecular weight Mw of 1,300,000 was purchased from Across Organic. Dichloromethane (DHM) was purchased from Carlo Erba reagents, dimethylformamid (DMF) was purchased from Centrohem (StaraPazova, Serbia) and ethanol (96%) from Reahem (Novi Sad, Serbia). Pomegranate seed oil (PSO) and ethanolic extract of fermented pomegranate juice (EP) were purchased from Suncokret (Hajdukovo, Serbia) and cold-pressed sea-buckthorn oil (SB) was purchased from NaturaSiberica (Belgrade, Serbia). 1,1-Diphenyl-2-picryl-hydrazyl-hydrate (DPPH) was purchased from Sigma (Sigma-Aldrich GmbH, Steinheim, Germany). TPZT (2,4,6-tris (2-pyridil)-s-triazine), iron (III)-chloride, iron (II)-sulfatheptahydrate, and potassium persulfate and trolox (6-hydroxy-2,5,7,8-tetramethylchroman-2-carboxylic acid) were purchased from Sigma-Aldrich (Milano, Italy). Sodium acetate and hydrochloric acid were obtained from Merck (Darmstadt, Germany). ABTS (2,2'-azino-bis-(3-ethylbenzothazoline-6-sulfonic acid) diammonium salt) was purchased from J&K Scientific GmbH (Pforzheimer, Germany). All chemicals were used as received.  
Samples were prepared by electrospinning using Fluidnatek LE-10 setup by BioInicia. The feed rate was adjusted in the range of 0.5-2.5 mL, needle-to-collector distance was from 10-15 cm and voltage was from 10-15 kV. Detailed electrospinningning process parameters for each sample are given in Table 1.  
The initial solution of pure PLA for electrospinningning was prepared as 12 wt% in solvent mixture of dichloromethane and dimethylformamide in ratio 6:4. PVP was dissolved in ethanol in concentration of 9 wt%. The concentration of active compound was calculated on the weight of polymer and active compounds were added to those solutions prior to electrospinningning. Polymer-based solutions were mixed on magnetic stirrer 24 h before electrospinningning. All samples are summarized in Table 1.  
The morphology of the samples was examined under a few magnifications using Hitachi Tabletop TM303 scanning electron microscope. Samples were placed on a holder and thin layer of gold was deposited on top by an evaporation method, after what they were exposed to electron beam of 15 kV. Using SEM micrographs, average fiber diameter was calculated using homemade software by measuring 50 fibers. Values of fiber diameters were expressed as mean \(\pm\) standard deviation.  
The chemical structure of samples was examined with ATR-FTIR, attenuated total reflectance Fourier transform infrared spectroscopy, using Shimadzu IRaffinity-1S instrument in the range of 400 to 4000 cm\({}^{-1}\) and resolution of 4 cm\({}^{-1}\).  
Mechanical properties were measured using Shimadzu EZ Test machine. Samples were cut in a rectangular shape and stretched using the constant speed of 1 mm/min. Elongation at break and maximum stress were followed for all samples. The thickness of the samples was measured using byko-test 4500 Fe/NFe tester by BYK, Germany.  
Thermal properties were examined by DSC TA Instruments Q20 using 5-10 mg of sample for each analysis. PLA-based samples were heated in one cycle from 20 \({}^{\circ}\)C to 200 \({}^{\circ}\)C, while PVP-based samples were heated from 20 \({}^{\circ}\)C to 180 \({}^{\circ}\)C, both series with heating rate of 10 \({}^{\circ}\)C/min.