Chemical Composition and Antioxidant Activities of the Oleoresin from the Clove Buds (Syzygium Aromaticum) (Published)
The chemical composition and antioxidant activities of the oleoresin from clove buds were investigated in this work. The results showed that 20 compositions of the oleoresin were identified, and eugenol (72.85%) was found to be the main components of the oleoresin, followed by eugenyl acetate (10.54%), β-caryophyllene (4.54%), and d-cadinene (3.88%). The oleoresin from clove buds had the better scavenging capacity against 2,2-diphenyl-1-picrylhydrazyl (DPPH) and 2, 2’-azino-bis (3-ethylbenothiazoline-6-sulfonic acid) diammonium salts (ABTS) radicals, and inhibiting lipid peroxidation reaction in lard emulsion, as well as exhibited different protection effects against DNA damage caused by Fe2+ and 2,2′-azobis (2-methylpropionamidine) dihydrochloride (AAPH). And the antioxidant activities of oleoresin showed a dose-response relationship to some degree. However, the oleoresin did not have the protection against protein damage, but had a prooxidant effect on protein oxidative damage.
Keywords: Antioxidant activity, Chemical composition., Free radical, Oleoresin
Chemical Composition and Antioxidant Activities of the Oleoresin from the Clove Buds (Syzygium Aromaticum) (Published)
The chemical composition and antioxidant activities of the oleoresin from clove buds were investigated in this work. The results showed that 20 compositions of the oleoresin were identified, and eugenol (72.85%) was found to be the main components of the oleoresin, followed by eugenyl acetate (10.54%), β-caryophyllene (4.54%), and d-cadinene (3.88%). The oleoresin from clove buds had the better scavenging capacity against 2,2-diphenyl-1-picrylhydrazyl (DPPH) and 2, 2’-azino-bis (3-ethylbenothiazoline-6-sulfonic acid) diammonium salts (ABTS) radicals, and inhibiting lipid peroxidation reaction in lard emulsion, as well as exhibited different protection effects against DNA damage caused by Fe2+ and 2,2′-azobis (2-methylpropionamidine) dihydrochloride (AAPH). And the antioxidant activities of oleoresin showed a dose-response relationship to some degree. However, the oleoresin did not have the protection against protein damage, but had a prooxidant effect on protein oxidative damage.
Keywords: Antioxidant activity, Chemical composition., Free radical, Oleoresin
Profile of Free Radical Scavenging and Antibacterial Activities of Extracts from Scutellaria Baicalensis Georgi Radix (Published)
Free radical scavenging and antibacterial activities of the extracts from the radix of Scutellaria baicalensis Georgi were examined in this paper. The extracts exhibited the better scavenging activities against 2,2-Diphenyl-1-picrylhydrazyl (DPPH) and 2,2’-azino-bis (3-ethylbenothiazoline-6-sulfonic acid) diammonium salts (ABTS). The results of antibacterial tests showed that the sensitivities to the extracts of different foodborne pathogens tested were different based on Oxford cup method, minimum inhibitory concentration (MIC), and minimum bactericidal concentration (MBC) assays, and the extracts exhibited better antibacterial activity against tested Gram-positive and Gram-negative bacterial. These results suggest that Scutellaria baicalensis Georgi may be a new potential source as a natural antioxidant and bacterial inhibitor.
Keywords: Antibacterial activity, Free radical, Scutellaria baicalensis Georgi