Polyphenols are biologically active
 compounds with antioxidant properties present in
 foods such as black tea, coffee, red wine and cocoa;
 its content depends on atmospheric conditions,
 cultivation, processing storage. The objective of
 this work was to determine the of polyphenols
 in beverages by two colorimetric methods
 establish a correlation antioxida...

OBJECTIVE Boerhaavia elegans L. (Nyctaginaceae) is a medicinal plant used for the treatment of kidney disorders, urinary tract disorders and blood purification in Baluch tribe. The aim of present study is to evaluate the antioxidant property of B. elegans species for the first time. MATERIALS AND METHODS Different parts (leaf, stem and fruit) of the plant were extracted by using various solve...

In the calorimetric methods for the determination of tyrosine and tryptophane, described by Folin and Ciocalteu (1) in 1927, 1 or 2 gm. of protein material are taken for the preliminary hydrolysis. It has seemed desirable to try to adapt these methods to the use of smaller amounts of material (0.1 gm.) in order to broaden the applicability of the methods. While this work was in progress, there ...

Plasma acid phosphatase estimation is of established value in the diagnosis of carcinoma of the prostate with bone secondaries, and in the assessment of stilboestrol treatment (Gutman and Gutman, 1938; Herbert, 1946; Wray, 1956). Modifications of the method of Gutman and Gutman (1938), using disodium phenyl phosphate substrate, and estimating the phenol liberated with Folin and Ciocalteu reagen...

The main objective of this study was the screening of some selected aromatic plants very popular in Greece, with respect to their total phenolic content, antioxidant capacity, reducing activity, and oxidative stability. All plants were extracted with the conventional method, reflux with methanol. The essential oils of the plants were also analyzed for their antioxidant properties. The total phe...

Several epidemiological studies have shown an inverse association between the consumption of polyphenol-rich foods and risk of cardiovascular diseases. However, accuracy and reliability of these studies may be increased using urinary total polyphenol excretion (TPE) as a biomarker for total polyphenol intake. Our aim was to assess if antioxidant activity, measured by a Folin-Ciocalteu assay in ...

Methods available for the measurement of antioxidant capacity are reviewed, presenting the general chemistry underlying the assays, the types of molecules detected, and the most important advantages and shortcomings of each method. This overview provides a basis and rationale for developing standardized antioxidant capacity methods for the food, nutraceutical, and dietary supplement industries....

The anti-oxidant activity and total phenolic content of alcoholic extracts from seven medicinal plants (Asparagus racemosus, Ocimum sanctum, Cassia fistula, Piper betel, Citrus aurantifolia, Catharanthus roseus, and Polyalthia longifolia) were evaluated by using a model system consisting of β-carotene, DPPH free radical and Folin-Ciocalteu method. The total Phenolic content of the extracts was ...