... article as: Butnariu and Giuchici: The use of some nanoemulsions based on aqueous propolis and lycopene extract in the skin’s protective mechanisms against UVA radiation Journal of Nanobiotechnology ... the dissolution of certain groups during the process of obtaining the nanoemulsion In the case of the bands group in the range of 1150-1250 cm-1, characteristic of ester groups (-C-O stretching), ... of concentration in the selected domain and used for calibration curves For each calibration point we examined the distribution, the relative percentage deviation of recalculated concentration...