Polyphenols and antioxidant properties of extracts from Mentha pulegium L. and Matricaria chamomilla L.

Abstract

Introduction: Mentha pulegium L. and Matricaria chamomilla L. are used in the Algerian folk medicine. This study was carried out to determine the antioxidant activity of these plants and their polyphenols contents. Methods:The antioxidant capacity of the plant extracts was determined by the scavenging activity against 1,1-diphenyl-2-picrylhydrazyl (DPPH) and β-carotene/linoleic acid model system. Total phenolic content in these extracts were determined using Folin-Ciocalteu's reagent. Results: The methanolic extract (MeE) of Mentha pulegium L. showed the highest yield of extraction (14.4%). Whereas, the aqueous extract (AqE) of Matricaria chamomilla L. had the highest yield (18.56%) from total extracted plant material. Moreover, the ethyl acetate extract of Mentha pulegium L. contains high amount of total polyphenols; tannins and flavonoids (191.99 µg gallic acid equivalent/g dry extract; 265.33 µg tannic acid equivalent/g dry extract; 110.37 µg quercetin equivalent/g dry extract; 151.11 µg rutin equivalent/g dry extract) respectively. This extract possessed high antioxidant activity (IC 50 =0.017 mg/ml) in the DPPH assay whilst the chloroformic extract (ChE) is more efficient in the β carotene/linoleic acid assay with (61.07%). The ChE of M. chamomilla contains the higher value of flavonoids (197.43 µg quercetin equivalent/g) and total polyphenols were abundant in MeE. The ethyl acetate extract of this plant had the highest antioxidant activity (IC 50 = 0.0111 mg/ml) in the DPPH assay, while chloroformic extract shows appreciable inhibition value (37.15%) in the β carotene/linoleic acid assay. Conclusion: These results provide useful information about the utilization of these plants as natural antioxidants in food and in folk medicine.

Antioxidant properties of candy caramel with plant extracts

“…The values of TAC for comparability in the subsequent discussion of the results are presented with the usage of two referential substances -ascorbic and gallic acids. The obtained value of TPC 17.1 mg GAE/g SW for aqueous extract (1:10 w/w) of Matricaria chamomilla L. corresponds properly to the values of 14.697 and 17.8 mg GAE/g SW, according to [14,15], respectively. Also, there is satisfactory data comparability on the total antioxidant capacity of TACs aqueous infusions of these plant samples that were obtained also by the method of coulometric titration [32].…”

“…From a pharmacological point of view, this product is a selective inhibitor of COX-2 with anti-inflammatory activity [10], demonstrates antimicrobial, antioxidant, antiplatelet and chemopreventive effects [11,12]. The antioxidant effect of MCF is associated with the content of essential oil (not less than 0.3%), which includes chamazulene, prochamazulene, other terpenes and sesquiterpenes [13], as well as the presence of polyphenolic compounds [14,15].…”

The Effect of Selected Herbal Extracts on Lactic Acid Bacteria Activity

“…The crude extract of sage (S. officinalis L.) studied by Koşar et al [70] contained hydroxybenzoic acids, hydroxycinnamic acids, flavonoids, and diterpenoids, in addition to caffeic acid, carnosic acid, luteolin, luteolin-7-O-glucoside, and rosmarinic acid. However, the composition of the plant extract may vary depending on the method used for extraction [5,[71][72][73]. The sage extract obtained by Houghton [5] also contained cyclic monoterpenes, such as 1,8-cineol, α-pinene, and camphor.…”

“…The method of extraction not only determines the chemical composition of chamomile extract but also its antioxidant activity [72]. Flavonoids represent the major fraction of water-soluble components in chamomile [71]. Their values in chamomile aqueous extract were established as follows: quercetin equivalent per gram of extract-27.65 ± 0.007 µg; GAE per gram of extract-146.97 ± 0.046 µg, and tannic acid equivalent per gram of extract-132.22 ± 0.023 µg.…”

Combined Antibacterial Activity of Cetylpyridinium Chloride in the Presence of Two Herbal Extracts Against Streptococcus mutans

“…The galls of Q. infectoria contain about 50-70% of tannins in composition that yields > 2000 mg/ mL tannins concentration in the hydroalcoholic extract (The effect of extraction temperatures on tannin content). Tannins concentration is less than 200 mg/mL in the hydroalcoholic extract of M. chamomile (27).…”