vitro antioxidant activity of the hydroalcoholic extracts
from V. squamata and its respective nanoemulsions.
The hydroalcoholic extract obtained from leafs and
stems of V. squamata were evaluated for their ability
to scavenge DPPH radical, observed by the absorbance
decrease of the solution. The results for hydroalcoholic
extract and nanoemulsions, prepared with it, revealed
the antioxidant property of the V. squamata leaves
(Figure 1 and 2). Below the median inhibition
concentration (IC50) was observed that the radical
inhibition properties are dependent on the concentration
of the extracts (Figure 1 and 2, at left).
Djeridane et al. (2006) have demonstrated a
linear correlation between the content of total phenolic
compounds and their antioxidant properties. This
may be related to the polyphenols which have been
identified by phytochemicals tests in the leaves and
stems of V. squamata. In accordance to Wojdyło et
al. (2007) phenolic acids represent the main class of
phenolic compounds that are widely distributed in the
plant kingdom.
Total phenolic content
The total phenolic content of hydroalcoholic
extracts from V. squamata were in range of 26.52 μg