the essential oils, isolated by hydrodistillation from the leaves, seeds and rhizomes of heracleum sprengelianum (wight and arnott), collected from the western ghats of peninsula india, were analyzed by gas chromatography (gc) and gas chromatography coupled to mass spectrometry (gc–ms). the antioxidant property of these oils was tested, with and without peroxidation inducer, through the egg yol...

Two phenolic compound parameters (total phenolic and flavonoid contents) and 5 antioxidant parameters (DPPH [2, 2-diphenyl-1-picrylhydrazyl] radical scavenging activity, HRSC (hydroxyl radical scavenging capacity), FRAP (ferric ion reducing antioxidant power), CUPRAC (cupric ion reducing antioxidant capacity), and MCA (metal chelating activity) were measured in bulbs and bolts of 43 garlic cult...

Brazilian flora presents a vast biodiversity with great chemical and pharmacological potentialities. Particularly, the local industries of distilled spirits (cachaça) are actively searching for a type of wood that can substitute the oak in the aging process of those beverages. The great challenge is to find a wood with a phenolic content similar to oak and, at the same time, can furnish analogo...

Withania somnifera of the family Solanaceae has been considered as an important herb in the traditional Ayurvedic and in the indigenous medical system in Bangladesh for its use in the prevention of different central nervous system (CNS) disorders, especially in the conditions of stress and neurodegenerative diseases. Five different extracts of Withania somnifera root were scrutinized to unfold ...

This review summarizes the multifaceted aspects of antioxidants and the basic kinetic models of inhibited autoxidation and analyzes the chemical principles of antioxidant capacity assays. Depending upon the reactions involved, these assays can roughly be classified into two types: assays based on hydrogen atom transfer (HAT) reactions and assays based on electron transfer (ET). The majority of ...

BACKGROUND & AIMS It has been previously reported that pasta containing wholegrain sorghum flour exhibits high content of polyphenols and antioxidant capacity and hence might enhance antioxidant status and reduce markers of oxidative stress in vivo; however no clinical studies have yet been reported. Therefore, the present study assessed the effect of pasta containing red or white wholegrain so...

Cornus species fruits are well known as a rich source of antioxidant compounds responsible for their diverse health benefits. The present study aims to investigate the variation of the total antioxidant capacity of Cornelian cherry (Cornus mas L.) fruits during storage, using high-performance thin-layer chromatography (HPTLC) and two spectrophotometric assays based on different mechanisms: the ...

The antioxidant properties of durian (Durio zibethinus Murr., cv. Mon Thong) at different stages of ripening were investigated using fluorometry, UV spectroscopy, and HPLC/DAD analyses. Total polyphenols, flavonoids, anthocyanins and flavanols in ripe durian were significantly higher ( p < 0.05) than in mature and overripe fruits. Free polyphenols and flavonoids were at lower levels than hydrol...

Vegetables are the most important sources of phenolics in the Mediterranean diet. Phenolics, especially flavonoids, are suggested as being essential bioactive compounds providing health benefits. In this study, twenty-seven vegetables, fifteen aromatic herbs and some spices consumed in Central Italy (the Marches region) were studied to reveal total phenolic, flavonoid and flavanol content as we...

INTRODUCTION Coffee is a widely consumed beverage containing antioxidant active compounds. During roasting the phytochemical composition of the coffee bean changes dramatically and highly polymeric substances are produced. Besides chlorogenic acids that are already present in green coffee beans, melanoidins show antioxidant capacity as well. OBJECTIVE To employ post-column derivatisation by c...