Results 281 to 290 of about 8,534,274 (349)

Total Phenolics

Methods to Study Litter Decomposition, 2005
Felix Bärlocher, Manuel A. S. Graça
openaire   +2 more sources

Systematic evaluation of the Folin-Ciocalteu and Fast Blue BB reactions during the analysis of total phenolics in legumes, nuts and plant seeds.

Food & Function, 2020
Folin-Ciocalteu and the more recent Fast Blue BB (FBBB) reactions are used for the quantification of total phenolics in food matrices. Despite its known interferences, Folin-Ciocalteu is still widely employed, considering Solid Phase Extraction (SPE) as ...
Joana Pico, R. Pismag, Mallory Laudouze, Mario M. Martinez   +3 more
semanticscholar   +1 more source

Colorimetry of Total Phenolics with Phosphomolybdic-Phosphotungstic Acid Reagents

American Journal of Enology and Viticulture, 1965
Several details of the assay of total phenolic substances have been investigated and an improved procedure developed. The improvements include the use of Folin-Ciocalteu reagent rather than the Folin-Denis reagent, gallic acid as a reference standard ...
V. L. Singleton, J. Rossi
semanticscholar   +1 more source

Polychlorinated phenols in total diet

Zeitschrift für Lebensmittel-Untersuchung und -Forschung, 1994
A method has been developed for the isolation, separation and determination of chlorinated phenols in total diet. The isolation takes place following acid hydrolysis of the conjugates and is performed by simultaneous extraction and distillation with water vapour and toluene.
M, Veningerová, V, Prachar, J, Uhnák, J, Kovacicová   +3 more
openaire   +2 more sources

Total Synthesis of the Phenolic Steroid Myrmenaphthol A

Organic Letters, 2022
Myrmenaphthol A is a structurally unique phenolic steroid with a naphthyl AB-ring system and an unusual C2 hydroxy group. Herein, we report the first total synthesis of this natural product in 10 steps from inexpensive, commercially available sitolactone.
Mengqing Zhang, Huafang Fan, Yun Wang, Jinghan Gui   +3 more
openaire   +2 more sources

Antioxidant Activity, Total Phenol, and Total Flavonoid of Syzygium Polyanthum

2021 IEEE International Conference on Health, Instrumentation & Measurement, and Natural Sciences (InHeNce), 2021
Free radicals are molecules that have an unpaired electron in their outer orbital so they are highly reactive. Antioxidants (free radical scavenging compounds) are substances that can neutralize free radicals, or materials that function to prevent the body's biological systems from being oxidized excessively.
Loudfy Eka Widyawaty, I Nyoman Ehrich Lister, Sukirman Lie   +2 more
openaire   +1 more source

Condensed Tannins and Total Phenols in Stylosanthes Spp.

XXV International Grassland Congress (IGC 2023), 2023
Rangelands, such as the species of the genus Stylosanthes, are plants highly selected by animals and represent an important forage source for livestock in the Northeast region of Brazil. Plants of this genus are naturally occurring in several places in Brazil and other semi-arid areas. The variability of condensed tannins and total phenols in different
Santos, M. V. F., Muir, J. P., Oliveira, O. F., Macêdo, I. M., Diniz, W. P. S., Cunha, M. V., Dubeux, José C. B. Jr., Lira, M. A., Ferrreira, R. L. C.   +8 more
openaire   +1 more source

Total synthesis of phenolic alkaloids

Tetrahedron Letters, 1983
Abstract The total synthesis of (±)-ribaline is reported; in combination with earlier findings, this represents a formal total synthesis of (+-)-ribalinidine.
Renée A. Corral, Orfeo O. Orazi, Juan C. Autino   +2 more
openaire   +1 more source

Automated Determination of Total Phenol in Urine

American Industrial Hygiene Association Journal, 1972
A fully automated method has been developed to determine total phenol in urine. Results agree well with the accepted manual method. In this automated method, samples are run at the rate of ten per hour. Only 1 to 2 ml of sample is needed. In 1 man-day, forty samples can be analyzed.
R N, Heistand, A S, Todd
openaire   +2 more sources