Results 231 to 240 of about 37,620 (277)

Determination of esculin in pharmaceutical preparations by means of Folin-Ciocalteu reagent.

Acta poloniae pharmaceutica, 1972
openaire   +1 more source

Modified Folin–Ciocalteu Antioxidant Capacity Assay for Measuring Lipophilic Antioxidants

Journal of Agricultural and Food Chemistry, 2013
The Folin-Ciocalteu (FC) method of performing a total phenolics assay, originally developed for protein determination, has recently evolved as a total antioxidant capacity assay but was found to be incapable of measuring lipophilic antioxidants due to the high affinity of the FC chromophore, that is, multivalent-charged phospho-tungsto-molybdate(V ...
Dilek Özyurt, Reşat Apak
exaly   +5 more sources

Folin-Ciocalteu reagent for the estimation of siderochromes

Analytical Biochemistry, 1965
1. A simple method has been devised for the estimation of siderochromes based on their reaction with Folin-Ciocalteu reagent to give a blue complex under alkaline conditions. 2. The applicability of the method to biological systems has been tested with N.
Subramanian, KN, Padmanaban, G, Sarma, PS   +2 more
openaire   +4 more sources

Automatic Method for the Determination of Folin−Ciocalteu Reducing Capacity in Food Products

Journal of Agricultural and Food Chemistry, 2006
In the present work, an automatic flow procedure based on multi-syringe flow injection analysis was developed for the assessment of Folin-Ciocalteu reagent (FCR) reducing capacity in several types of food products using gallic acid as the standard. Different strategies for mixing of sample and reagent were tested (continuous flow of FCR, merging zones,
Magalhães, Luís M., Segundo, Marcela A., Reis, Salette, Lima, José L. F. C., Rangel, António O. S. S.   +4 more
openaire   +4 more sources

Utilization of Folin−Ciocalteu Phenol Reagent for the Detection of Certain Nitrogen Compounds

Journal of Agricultural and Food Chemistry, 2003
To determine in more detail the reaction of Folin-Ciocalteu phenol reagent with nitrogen compounds, a number of hydroxylamine-related compounds and a large number of guanidine-containing compounds were tested. In general, guanidine compounds did not react strongly unless they were hydroxyamino or hydrazino derivatives.
Ikawa, Miyoshi, Schaper, Timothy D., Dollard, Catherine A., Sasner, John J.   +3 more
openaire   +4 more sources

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Quantification of total phenols in bio-oil using the Folin–Ciocalteu method

Journal of Analytical and Applied Pyrolysis, 2013
Abstract Bio-oil from fast pyrolysis of biomass contains phenolics derived from the lignin portion of the biomass. Traditional testing for total phenolics in bio-oil is based on either a rough estimate of the weight percent water-insolubles in bio-oil or on tedious liquid–liquid extraction methods.
Marjorie R Rover
exaly   +2 more sources

Rapid microplate high-throughput methodology for assessment of Folin-Ciocalteu reducing capacity

Talanta, 2010
In the present work, a rapid and high-throughput Folin-Ciocalteu (F-C) reducing capacity assay adapted to routine/screening analysis was developed. In order to attain a fast F-C reducing kinetic reaction, the reaction conditions of the classical time-consuming F-C assay were modified and the influence of alkali and F-C reagent concentration was ...
Luis M MAGALHÃES, Fernando Santos, Marcela A Segundo   +2 more
exaly   +3 more sources