Total phenolics, anthocyanins, antioxidant and pro-oxidant activity of some red fruits teas

Abstract

Fruits represent one of the main dietary sources of bioactive compounds. Due to their remarkable health benefits, many functional foods of fruit origin, including fruit teas, are present on the market and there is an increased interest regarding the investigation of their nutritional parameters and quality. The aims of our study were: 1) to determine the total phenolic content (TPC), total anthocyanins content (TAC), antioxidant activity (AA), the scavenging capacity (IC50), the pro-oxidant activity (Pro-ox) and Pro-Antidex of 12 commercially available red fruit teas, 2) to classify the analysed teas and 3) to evaluate the similarities between samples. The TPC was between 12.5 and 29.3 mg gallic acid equivalents (GAE)/g tea, the TAC varied between 2.6 and 5.6mg cyanidin-3-glucoside (Cy-3-glu)/g tea and AA was in the range of 10.9-19.1 mg ascorbic acid equivalents (AAE)/g tea. The Pro-ox activity varied between 3.9 and 10.0 mg/mL tea extract and Pro-Antidex was between 3.3 and 7.3.

Storage stability of microencapsulated Lactobacillus rhamnosus GG in hawthorn berry tea with flaxseed mucilage

“…Figure 4 demonstrated that no significant difference ( p > .05) was shown between the TPC of hawthorn berry tea supplemented with and without the addition of probiotics (1,908.1–2,207.3 mg GAE/100 g sample) on the day of treatment (week 0). The obtained TPC values were comparable to blueberry tea (23.23 mg GAE/g blueberry tea) and raspberry tea (15.84 mg GAE/g raspberry tea) (Moldovan et al., 2016). According to Jurikova et al.…”

“…of probiotics (1,908.1-2,207.3 mg GAE/100 g sample) on the day of treatment (week 0). The obtained TPC values were comparable to blueberry tea (23.23 mg GAE/g blueberry tea) and raspberry tea (15.84 mg GAE/g raspberry tea) (Moldovan et al, 2016). According to Jurikova et al (2012) and Wu et al (2015), the major phenolic compound found in the hawthorn berry is epicatechin, chlorogenic acid, isoquercitrin, procyanidin, and ursolic acid.…”

Secondary Metabolites Profiling of Acinetobacter baumannii Associated with Chili (Capsicum annuum L.) Leaves and Concentration Dependent Antioxidant and Prooxidant Properties

“…Recent literature reports reveal that plant-based natural compounds of Brassica oleracea L. var. sabauda [47], red fruits teas [48], Salicornia herbacea L. [49], vegetables and agricultural by-products [50], ascorbic and humic acids [51], Raphanus sativus var. niger [52], green tea [53], and eugenol [54] display both antioxidant and prooxidant behaviours under certain circumstances.…”

SG-SP1 Suppresses Mast Cell-Mediated Allergic Inflammation via Inhibition of FcεRI Signaling

“…These compounds could be ameliorated by chemical modifications (31). Epigallocatechin gallate (EGCG), a major component of green tea, is known to have many biologic activities including anti-oxidation, anti-inflammation, and anti-bacterial/viral infections (32)(33)(34)(35)(36)(37). GA, a part of EGCG, was shown to have inhibitory effects on mast cell-mediated allergic inflammation in our previous studies, and we have generated various derivatives of GA to improve its pharmacological effectiveness (10,11).…”