Propolis induced antibacterial activity and other technical properties of cotton textiles

FTIR analysis and quantification of phenols and flavonoids of five commercially available plants extracts used in wound healing

“…A band at 1513 cm -1 , related to aromatic ring deformations [23] and to flavonoids and aromatic rings (stretching of aromatic C=C). A band at 1410 cm -1 , C=C ring stretching (which occurs in pairs at 1638 cm -1 and at 1409 cm -1 ) [22]. Bands at 1375 cm -1 and at 1333 cm -1 were non-identified.…”

“…Bands approximately in the same range of wavelength in different propolis samples were also identified, e.g. a band at 3487 cm -1 , related to stretching (ν) vibration of hydroxyl groups [21] and a band at 3433 cm -1 , related to OH wagging (OH of phenolic compounds) [22]. Bands at 2924 cm -1 and at 2883 cm -1 could be attributed to ethanol [19].…”

“…A band was found at 1640 cm -1 . This band could be due to stretching vibration of C=C groups [21], due to aromatic ring deformations [23], due to flavonoids and amino acids: stretching vibration of C=O and of C=C, asymmetric bending vibration of N-H [24], due to C=O stretching vibration of caffeic acid and its derivatives [22] and due to stretching vibration of C=O of lipids and flavonoids [20]. The band at 1457 cm -1 could be related to CH 3 , CH 2 , flavonoids and aromatic rings, where the vibrations would be the bending (δ) vibration of C-H and the stretching vibration of aromatics [24] [25].…”

“…The band at 1252 cm -1 would be due to vibration of C-O group of polyols, such as hydroxyflavonoids [25]. A band at 1086 cm -1 would be related to secondary alcohols [20] and/or to C-O-stretching ester group [22]. There was a non-identified band at 945 cm -1 and a band at 878 cm -1…”

“…A band at 1136 cm -1 related to tertiary alcohols [20]. A band at 1039 cm -1 , probably related to primary and secondary alcohols [20] and to C-O-stretching ester group [22]. The bands at 990 cm -1 , 922 cm -1 , 837 cm -1 and 803 cm -1 were not identified.…”