Fatty Acid Composition and Antioxidant Activity of Tricholoma Imbricatum and T. Focale

Abstract

Edible mushrooms are one of the important food source because of their tastes, and having high concentration of fatty acids and the other nutrients. In this study, fatty acid composition and antioxidant properties of Tricholoma imbricatum and T. focale were determined. The fatty acids were analysed by GC, and GC-MS while the antioxidant activity was tested using five complimentary methods; namely, β-carotene-linoleic acid, DPPH scavenging, ABTS scavenging, CUPRAC and metal chelating assays. Eight fatty acids were determined in hexane extract, and oleic acid was the major fatty acid with 46.4% and 35.0%, respectively. Palmitic acid (12.8%, and 5.12%) and lineloic acid (28.2% and 31.0%) were also detected in high amounts. In DPPH . scavenging and ABTS ·+ scavenging assays, the methanol extract of T. imbricatum (IC 50 : 0.12±0.01 mg/mL for both assay) showed better antioxidant activity than those of T. focale (IC 50 >0.8±0.01, and IC 50 : 0.21±0.01 mg/mL). All extracts of T. focale exhibited good activity in β-carotenelinoleic acid assay while only the hexane extract of T. imbricatum showed activity. Both mushroom indicated moderate in cupric reducing power. Since the mushrooms are nontoxic and edible, both can be used in food industry as preservatives.

Musa paradisiacaL. leaf and fruit peel hydroethanolic extracts improved the lipid profile, glycemic index and oxidative stress in nicotinamide/streptozotocin‐induced diabetic rats

“…(2008) reported the antioxidant activity of the extracted flavonoids from M. paradisiaca in rats. According to GC‐MS results of the extract, the presence of vitamine E and palmitic acid, which are already known to possess high antioxidant activities, may be related to the greater antioxidant activity (Almeida et al., 2012; Elagbar et al., 2016; Kaplaner et al., 2017; Varvařovská et al., 2004).…”

Chemical Composition and Antioxidant Effect of Mentha rotundifolia Extracts

“…Decrease in the red color of the complex ferrozine-Fe 2+ indicates high radical scavenging activity of the compound. 23 To compare the effect of aqueous, acetonic extracts and standard (EDTA), the values of IC 50 were calculated, which demonstrated that EDTA possess the most powerful chelating activity (IC 50 = 6.273± 0.288 µg/mL) followed by the aqueous extract (IC 50 = 128.155±5.887 µg/mL). However, the acetonic extract didn't reach 50% chelating activity and presents maximal activity of 41.433±2.518 % at 468.75 µg/mL.…”

“…In this test, the antioxidants give hydrogen molecules to the media which stops the peroxidation of linoleic acid, the hydrogen also scavenge singlet oxygen responsible of linoleic acid peroxidation. 23 The lowest β -carotene discoloration rate exhibited the highest antioxidant activity, Figure 6 shows the lipid peroxidation inhibitory activity of M. rotundifolia extracts by the β carotene-linoleic acid assay. The inhibition ratios of the oxidation of linoleic acid by the acetonic and aqueous extracts, were giving approximately the same percentage of inhibition ratio, 79.778± 1.812% and 84.666± 0.963 % respectively.…”