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FRACTION PHENOLIQUE [2 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 1994-10-31

English

Subject field(s)
  • Agricultural Engineering
CONT

From wheat germ, substantial quantities of polar flavone glycosides with high antioxidant activity have been separated from the phenolics fraction.

OBS

phenolic: of, or relating to, or having the characteristics of phenol or a phenol.

French

Domaine(s)
  • Génie agricole
OBS

Équivalents communiqués par le département Science et technologie des aliments de l’Université Laval.

Spanish

Save record 1

Record 2 1992-10-20

English

Subject field(s)
  • Chemical Engineering
CONT

Product Oil Solution Extraction. Caustic extraction and solvent separation have been used to separate Albany products into neutral, acid and insoluble fractions. ... The separation was made by reacting the wood-derived product with excess aqueous 5% NaOH. The solution was then extracted with methylene chloride. The solvent was stripped from the organic layer to yield the neutral fraction. The aqueous phase was then reacidified with dilute HC1 and re-extracted with methylene chloride. The solvent was stripped from the organic phase to yield the acid fraction. The insolubles were filtered from the aqueous phase and dried. This particular scheme of extraction and separation was selected after several alternate techniques failed to provide adequate phase separation.

French

Domaine(s)
  • Génie chimique
DEF

Séparation d’un produit (par exemple d’origine biologique) en plusieurs fractions, par l’entremise d’une substance caustique telle que l’hydroxyde de sodium.

CONT

L'extraction alcaline de l'écorce contient un mélange complexe de produits chimiques organiques qui peuvent être classés en 4 types généraux : extraction/NaOH 1) Fraction de cires 2) Fraction phénolique fusible : complètement fusible en-dessous de 160°C 3) Fraction phénolique non fusible : température de décomposition 275°C à 300°C 4) Fraction phénolique acide soluble : tannins et un peu d’hydrates de carbone.

Spanish

Save record 2

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