No abstract

Twenty-five wild edible mushrooms from Northeastern Thailand were analyzed for their antioxidant activities, proteins, sugars, β-glucan, and phenolic profiles. Results showed that and exhibited the greatest scavenging activity (83.07 and 86.60%) and reductive power (9.79 and 8.42 g Fe(II)/kg, respectively). recorded the highest content of (+)-catechin and naringenin (13.40 and 0.74 g/kg dw), with the highest amount of quercetin and quercetin-3--rutinoside (1.82 and 1.16 g/kg dw, respectively). Both and also exhibited the greatest amounts of β-glucan (125.23 and 344.43 g/kg dw) and protein (343.30 and 452.20 g/kg dw, respectively) among the mushroom species evaluated. Results suggested that both and were a good source of healthy compounds, namely β-glucan and flavonoids, and could be used to mitigate diseases involving free radicals.

No abstract

The present study investigates the phenolic contents and antioxidant activities of silk sericin extracted (SSE) from Thai mulberry silkworms (Bombyx mori) and non-mulberry silkworm (Samia ricini). The SSE from all strains revealed the mainly presence of flavonoid compounds including (+)-catechin (20.63-145.64 mg/100 g), quercetin (7.89-35.95 mg/100 g), and (-)-epicatechin (3.36-44.19 mg/100 g). The antioxidant activity of the SSE with water from Chokumnoui 1 was found to have low EC 50 values (0.96 mg/mL), the concentrations of the SSE that exhibit 50% reduction in DPPH, and highest scavenging of ABTS • + radicals (1.73 mg TEAC/g) and highest reduce TPRZ-Fe (III) complex to TPTZ-Fe (II) (8.03 mg Fe(II)/g), thus indicating high antioxidant activities. Total phenolic content and total flavonoid content of the SSE showed positive correlated to the scavenging activity of DPPH and ABTS • + radicals and the ferric reducing ability (FRAP assay).