We used DPPH scavenging assays to study the antioxidant activity of three native Polish species of blackberry leaves (Rubus kuleszae Ziel., R. fabrimontanus (Sprib.) Sprib. and R. capitulatus Utsch.). All the studied extracts (methanolic, water, methanolic-water) showed high DPPH free radical scavenging activity (IC50 450.0–186.0 μg/ml). The most effective of the studied species was Rubus kules...

a pot experiment was conducted to evaluate the extract biochemical variations among 25 spearmint population. the experiment was a randomized complete design (rcd) with 25 treatments (population) and three replications. for this purpose, three rhizomes with 5 cm length were selected and planted in each pot. all pots were kept out side. the plant samples of all treatments were harvested at full f...

green tea is prepared from the leaves of camellia sinensis. catechins of green tea are well known as natural antioxidants and have effective beneficial on the body. one of the most important processes in the extraction of catechins and producing green tea beverage is brewing process. the object of this study is to investigating the effect of brewing temperatures (60٫70 and 80˚c) and duration (5...

In the present study, olive leaves of eight varieties were investigated for the total phenol and flavonoid content, for the major compound and for the in vitro antioxidant properties. The different varieties showed a high content of polyphenol and flavonoid. Oleuropein was the major compound of the leaf extract for all varieties. Also, olive leaves extract exhibited a good antioxidant activity ...

the mineral contents of centaura leave and seeds were determined by inductively coupled plasma-atomic emission spectroscopy (icp-aes). macro element concentrations (p, k, ca, mg and s) of samples were found at high levels. k was established at high level in both leave and seed samples of centaurea. while k contents of leaves changes between 7254.10 mg/kg (centaurea lycaonica) and 26396.36 mg/kg...

Olive leaves have drawn attention because of their contents bioactive compounds that exhibit antioxidant activity. The aim this study was to investigate the impact irrigation on phenolic and activity olive belonged different varieties collected between September December in irrigated rainfed orchards. Principal components analysis (PCA) used explain effect variables. highest total content deter...

Antibacterial activity, total phenolic content and flavonoid concentrations of extracts from the leaves of Arctostaphylos uva-ursi L. were performed. Tested bacterial strains are 20 clinical isolates, including different strains of Escherichia coli and Enterococcus faecalis. The total phenolic content was determined using Folin-Ciocalteu reagent. The concentration of flavonoids in extracts were...

the antioxidant and cytotoxic properties of four major parts of methanolic extracts of tephrosia purpurea including leaves, root, stem and seed were investigated and compared. in vitro antioxidant activity of t. purpurea extracts was evaluated using 1,1-diphenyl-2-picrylhydrazyl (dpph), ferric reducing antioxidant power (frap), reducing power assay and antihemolytic assay. in vitro cytotoxic ef...

This paper describes the antioxidant and antimicrobial activities and phenolic components of different solvent (absolute methanol, absolute ethanol, absolute acetone, 80% methanol, 80% ethanol, 80% acetone and deionized water) extracts of leaves, flowers and bark of Gold Mohar [Delonix regia (Bojer ex Hook.) Raf.]. The extract yields from leaves, flowers and bark ranged from 10.19 to 36.24, 12....