Physical and antibacte rial properties of alginate-based edible film incorporated with garlic oil

Physical, antibacterial and antioxidant properties of chitosan films incorporated with thyme oil for potential wound healing applications

“…The peak at 1545 cm -1 was assigned to strong vibrations of secondary amide. Strong absorption bands centered at 3400 cm -1 were concerned with the stretching vibration of O-H and N-H bonds and those in the region of 1030-1160 cm -1 were assigned to the C-O bonds [13,30]. Furthermore, in the C-H stretch region of FT-IR spectrum, the peak at 2932 cm -1 was assigned to the asymmetric mode of CH 2 [30,31].…”

“…The band due to CH 2 scissoring occured at 1466 cm -1 [31]. These indicated that there was no major structural change in the chitosan film by incorporation of thyme oil since there were no change in the peak intensities and no shift in the wave numbers [13]. Schulz et al assigned the most characteristic IR bands of carvacrol and thymol, which are the major compounds of thyme essential oil.…”

“…In recent decades, the interest in essential oils for use in food ingredients, perfumes, aromatherapy and pharmaceuticals has been rised [12]. Essential oils have been shown to possess antibacterial, antifungal, antiviral, insecticidal and antioxidant properties due to their biologically active compounds such as carvacrol, eugenol, and thymol [13]. Cinnamon, clove, basil, lavender and rosemary oils have shown antibacterial and antifungal activity whereas lemon and rosemary oils also possess antioxidant property [14].…”

“…The antimicrobial activity mechanism is commonly considered as resulted by disturbing the function of the cytoplasmic membrance, disrupting the active transport of nutrients to the cell membrane, and coagulation of bacteria cell contents [12,21]. The antimicrobial activities of some essential oils such as oregano, rosemary, and garlic oil incorporated into edible films have been investigated [13,22,23]. RojasGrau et al observed that carvacrol and oregano essential oil in alginate apple puree edible film showed significantly greater antimicrobial activity on E. Coli than the activities of lemongrass oil, citral, cinnamon oil, and cinnamaldehyde incorporated [24,25] incorporated the lemongrass oil into the partially hydrolyzed sago starch and alginate edible film and showed that lemongrass oil was effective against E. Coli at all studied levels [24,25].…”

Development, characterization and potential applications of edible film from seaweed (Kappaphycus alvarezii)

“…Seaweed derivatives such as alginate and carrageenan have been widely used to form edible films and their barrier and mechanical properties have been studied [1][2][3]. However, on another aspect, the possibility to form film directly from seaweed has not been explored.…”