In this study, essential oil and various extracts (hexane, petroleum ether, acetone, ethanol, methanol and water) of Eucalyptus gilii were screened for their chemical composition, antimicrobial and antioxidant activities. The essential oil chemical composition was analyzed by gas chromatography-mass spectrometry (GC-MS) and gas chromatography-flame ionization detection (GC-FID), respectively. T...

A series of ortho-hydroxypyridine-4-ones were prepared in high yields and evaluated for antioxidant and iron chelating activities. N(1)-H hydroxypyridinones Va, Vb, and Ve were the best radical scavengers in DPPH free radical scavenging assay. Compound Vb was proved to be the most potent compound in hydrogen peroxide scavenging assay. All of the synthesized compounds had very close chelating ab...

BACKGROUND As a by-product of tropical fruit juice industry, passion fruit peel is a valuable functional food. It is rich in antioxidants. To determine its potential antioxidant properties of passion fruit peel, this study aimed to evaluate the effect of extraction conditions on total phenolic content and antioxidant activity. METHODS The extraction conditions were selected from different per...

Larix decidua bark is a waste of the timber industry and is widely diffused in Northern Italy. This material can be considered a good source of antioxidants and phytoconstituents with possible use in cosmetic or nutraceutical products. In this study, simple extraction of larch bark was performed using mixtures of ethanol/water. Furthermore, the phytochemical composition of larch bark extract wa...

The objective of this study was the assessment antioxidant and cytotoxic activity from Tanacetum dolicophyllum. Soxhlet extraction has been used for preparing plant extracts which five solvents have used, i.e., Petroleum ether, benzene, ethyl acetate, ethanol, water. Proteins, tannins, phlobatannins, amino acids, carbohydrates, alkaloids, steroids, flavonoids, glycosides, cardiac phenols were d...

This study was undertaken to evaluate the antioxidative and lipid accumulation inhibitory effects in HepG2 cell of 11 Tunisian plants extracts. Total phenolics contents (TPC), total flavonoid (TFC) extracts were measured, activities analyzed using DPPH, ABTS, FRAP, ORAC TBA assay. Inhibitory effect oxidative stress evaluated by viability peroxidation level H2O2-treated cells. Lipid determined O...

antioxidant activities protect the cell against oxidative agents that are constant metabolic by-products. the aim of this study was to investigate the relationship between harvesting time of thymus transcaspicus and its antioxidant activities. the plant samples were harvested 5 times in different growth phases from 17 april to 22 july 2008, and its antioxidant activity was studied using the fer...

Ilex spinigera (Aquifoliaceae) plant is an evergreen tree or shrub with thick glossy dark green leaves and red fruits. This plant has medicinal properties and has been used traditionally in northern Iran for malaria treatment. The aim of this work is to evaluate the antioxidative activities and the inhibitory effect of I.spinigera on the oxidation of DNA. We have found no reports about the popu...

Pollen analysis, total phenols content and antioxidant activity were studied for the first time in Portuguese propolis samples from Bornes and Fundão regions. Total phenols content was determined by colorimetric assay and their amount was of 329 mg/g of GAE in Bornes sample and 151 mg/g of GAE in Fundão propolis. The antioxidant capacity of propolis extracts was assessed through the scavenging ...

A comprehensive study on the composition and antioxidant properties of black tea samples with a chemometric approach was performed via LC-ESI-Q-TOF-MS, DPPH radical scavenging assay, and Folin-Ciocalteu assay (TPC). Marked differences between the teas from seven different countries (China, India, Iran, Japan, Kenya, Nepal, Sri Lanka) were shown. The Indian samples demonstrated the highest total...