Antioxidant activities of different Teucrium montanum L. Extracts

Abstract

The sequential extraction of Teucrium montanum L. was realised with five solvents of different polarities (70% methanol, petroleum ether, chloroform, ethyl acetate, and n-butanol) and HPLC method was used for identification of phenolic compounds. The total phenolic content of the extracts was determined spectrophotometrically according to the Folin-Ciocalteau procedure and range from 0 to 296 mg g )1 .The antioxidant activity of extracts was tested by measuring their ability to scavenge reactive hydroxyl radical during the Fenton reaction, using electron spin resonance (ESR) spectroscopy. Moreover, the influence of these extracts on lipid peroxyl radicals obtained during lipid peroxidation of: (1) sunflower oil (37°C, 3 h) induced by 4,4¢-azobis(4-cyanovaleric acid) (ACVA) and (2) liposomes induced by 2,2¢-azobis(2-amidino-propane)dihydrochloride (AAPH) was studied. n-Butanol extract, because of the highest content of total phenolic compounds (296 mg g )1 ) had the best antioxidant activity (100% at 0.16 mg mL )1 in Fenton reaction system; 90.57% at 5 mg mL )1 in system I; 100% at 5 mg mL )1 in system II).

Evaluation of Antioxidant Properties, Phenolic Compounds, Anthelmintic, and Cytotoxic Activities of Various Extracts Isolated from Nepeta cadmea: An Endemic Plant for Turkey

“…In the present study, the phenolic contents of the ethanol extracts of N. cadmea were identified using the HPLC method and these are listed in Table . Some phenolic compounds determined in the present study, such as ferrulic, gallic, caffeic, vanilic, chlorogenic, ellagic acids, and rutin, were obtained from Lamiaceae plants in previous studies (Canadanovic‐Brunet et al., ; Mamadalieva et al., ; Roby et al., ). In addition, of these phenolic contents, ellagic acid is well known as an antioxidant (Mertens‐Talcott, Talcott, & Percival, ).…”

Purple Corn (Zea maysL.) Phenolic Compounds Profile and Its Assessment as an Agent Against Oxidative Stress in Isolated Mouse Organs

“…This is in accordance with the polarity of the solvent used for the extraction and the solubility of phenolic compounds present in the extract. 41 For samples assayed for the presence of anthocyanins, the ionization state can be important when assessing the antioxidant activity. 22 For instance, the quinoidal pseudo-base and base of malvidin-3-glucoside generated at pH 4.0 and 7.0, respectively, exhibit differences in antioxidant activity.…”

Therapeutic and Antioxidant Potential in the Shell Extract of Prunus amygdalus against Dermal Mycosis

“…Significant differences have been reported for TPC among the verities. Jasna et al [15] has found TPC in the range of 2.51-3.5 mg\g for bran extracts. Moreover Sathe et al [2] has determined differences in TPC extracted in various solvents with highest antioxidant activity for the n-butanol extract of almond skin T. while the lowest antioxidant activity for methanol extract.…”