The influence of home cooking methods (boiling, microwaving, pressure-cooking, griddling, frying, and baking) on the antioxidant activity of vegetables has been evaluated in 20 vegetables, using different antioxidant activity assays (lipoperoxyl and hydroxyl radicals scavenging and TEAC). Artichoke was the only vegetable that kept its very high scavenging-lipoperoxyl radical capacity in all the...

The GC-MS analysis of phenolic compounds present in guarana (Paullinia cupana), an important product of the Amazonian forest consumed in supplements or in soft drinks has been the subject of study. The therapeutic properties and possible protective effects reported for guarana and derivative products could be associated with the antioxidant activity of their phenolics content. The purpose of th...

Phytochemical-rich diets are protective against chronic diseases and mediate their protective effect by regulation of oxidative stress (OS). However, it is proposed that under some circumstances, phytochemicals can promote production of reactive oxygen species (ROS) in vitro, which might drive OS-mediated signalling. Here, we investigated the effects of administering single doses of extracts of...

Various cultivars of Perilla frutescens (L.) (var. crispa and var. frutescens) Britt. were harvested in China and Japan. They were easily differentiated on the basis of their foliage color, that varied from red to green. Water extracts of dried plants were investigated for their antioxidant activity (AA) and their polyphenolic compounds compared. Among them, cinnamic acid derivatives (coumaroyl...

Abstract Although many studies have explored the bioactive compound content of Nigella sativa (black seed – BS) essential oil, data on phenolic in extracts seeds gives inconclusive results [1–3]. In this study, response surface methodology (RSM) with a central composite plan (CCP) was used for experimental design and identification optimal conditions maximizing antioxidant activity BS extract. ...

Introduction: Parthenium hysterophorus is a plant used in traditional medicine to treat health issues and which could be source of phytochemicals with possible antioxidant activity without causing cytotoxic effects. Hence, this work was designed evaluate its phytochemical profile, cytotoxicity, activity. Methods: The aqueous (AE) ethanolic (EE) extracts P. flowers were obtained by decoction ult...

conclusions according to the obtained data, synthesized pyridine based chalcones (3a-3j) could be proposed as potential antioxidant lead compounds. background natural chalcones and also their synthetic derivatives have attracted increasing attention due to various pharmacological applications. development and discovery of new chalcones with antioxidant activities is one of the attracting areas ...

Tea is a beverage that known to contain polyphenols. Furthermore, the medicinal uses of mangroves have been recognized in tropical and subtropical coastal regions. Several polyphenols their leaves bark, previous studies demonstrated plant extracts are effective against many diseases. Moreover, use as tea materials has some However, scientific information on polyphenol content antioxidant activi...

Global climate change, specifically the intensification of marine heatwaves, affect seagrasses. In Ria Formosa, saturating light intensities may aggravate heatwave effects on seagrasses, particularly during low spring tides. However, photophysiological and antioxidant responses seagrasses to such extreme events are poorly known. Here, we evaluated Cymodocea nodosa exposed at 20 °C 40 150 450 ?m...