## 2 Materials and Methods
### Analytical Determinations  
All the analytical determinations were carried out at least in triplicate on the juices before inoculation and after incubation. The pH values were obtained using a digital pH-meter (Mettler Toledo Inlab, Schwerzenbach, Switzerland), calibrating the equipment prior to analysis with buffer solutions at pHs 7 and 4. Soluble solids content was determined with a refractometer (Abbe Atago BT, Nar T3, Tokyo, Japan), previously calibrated with distilled water and thermostated at 20 \({}^{\circ}\)C, by direct reading of their refractive indexes in Brix [23]. Density was measured with Bingham 25 mL pycnometer, for density and relative density determination in liquids (ASTM D1217, Scharlau Chemie(r), Barcelona, Spain) at room temperature (20-22 \({}^{\circ}\)C) and distilled water as the reference liquid [24]. Suspended pulp and cloudiness were determined following the methodology described by [PERSON] et al. [25], according to which the suspended pulp of a juice is equivalent to the volume of the precipitate obtained after centrifugation (Medefriger BL-S P-Select centrifuge) of 10 mL of sample at 365\(\times\)\(g\) (for unstable pulp) or 3000\(\times\)\(g\) (for stable pulp) at 25 \({}^{\circ}\)C for 10 min. The turbidity of the samples corresponds to the transmittance of the supernatant obtained after centrifugation, measured at 650 nm in a UV/Visible spectrophotometer (Thermo Scientific Helios Zeta U/Vis, Loughborough, UK). Particle size distribution was determined with the Malvern Mastersizer 2000 (Malvern Instruments Limited, Worcestershire, UK), equipped with a 470 nm blue light source and a 0.02-200 micron measuring range. The refractive index of the juices (cloud) and the dispersant (water) were set at 1.5 and 1.33, respectively. Absorption of the cloud particles was taken as 0.1. Particle size distribution of the juices was characterized by both volume (D [4,3]) and area (D[3,2]) equivalent diameters, and by the percentiles d10, d50, and d90, which correspond to the characteristic diameters below which 10%, 50%, and 90% of the particles are included in the distribution [26]. CIE*L*a*b* color coordinates were determined from the surface reflectance spectra obtained between 400 and 700 nm. The equipment was calibrated on white and black backgrounds, considering standard light source D65 and observer 10\({}^{\circ}\) (Minolta spectrophotometer CM-3600d, Osaka, Japan). The resulting CIE-L*a*b* color coordinates allowed calculating the psychometric coordinates: tone (h*ab) and chrome (C*ab) according to CIE [27]. Antioxidant properties. For antioxidants extraction, the samples were mixed with an 80:20 (\(v/v\)) methanol-water solution at a 1:10 ratio (\(w/v\)), stirred for 1 h using a magnetic device (RTC basic, Staufen, Germany), and centrifuged at 10,000 rpm and 20 \({}^{\circ}\)C for 5 min (Medefriger BL-S P-Select centrifuge). Subsequent analyses (total phenols and flavonoids and antiradical capacity) were carried out on the supernatant. Total phenols were determined following the Folin-Ciocalteu method [28,29], by mixing 0.125 mL of juice, 0.125 mL of Folin-Ciocalteu reagent (Sigma-Aldrich) and 0.5 mL of double-distilled water. This solution was allowed to react for 6 min. Next, 1.25 mL of 7% (\(m/v\)) sodium carbonate solution and 1 mL of double distilled water were added. Absorbance was measured at 765 nm in a spectrophotometer (Thermo Scientific Helios Zeta U/Vis, Loughborough, UK). A reference blank was prepared, wherein the sample was replaced by the same amount of double distilled water and was allowed to react for 90 min. A standard gallic acid curve ranging from 0 to 500 mg/L was obtained to express the results in milligrams of gallic acid equivalent (GAE) per mL. Flavonoids content was determined following methodology described by [PERSON] et al. [30]. This was done by mixing 5 mL of juice and 1.5 mL of a 2% (\(w/v\)) aluminum chloride solution, which was left in the dark for 10 min.