2.4. Preparation of the extracts
Extracts were prepared from whole aerial plant parts using twoparallel extraction procedures. Dry plant material was groundedinto small pieces (2–6 mm) in the cylindrical crusher. First, portionof 10 g of plant material was successively extracted by 100 mL ofdichloromethane, ethyl acetate, and methanol, according to proce-dure of S¸ enol et al. (2010) and Orhan et al. (2013). Second, portion of10 g of plant material was individually extracted by 100 mL of sol-vent (ethanol and hot distilled water). In both cases, extraction wasperformed by classic maceration during 24 h at room temperature(10% w/v). The mixture was exposed to ultrasound 1 h before andafter 24 h of maceration to improve extraction process (Veliˇckovi´cet al., 2007; Gliˇsi´c et al., 2011). Subsequently, extracts were fil-tered through a filter paper (Whatman No. 1) and evaporated underreduced pressure by the rotary evaporator (Buchi rotavapor R-114).After evaporation of the solvent, the obtained crude extracts werestored in the fridge at +4◦C for further experiments.