EX 6 Flashcards
- Polyphenolic secondary metabolites
- antioxidative, anti-inflammatory, anti-mutagenic, and anti-carcinogenic properties
FLAVONOIDS
FLAVONOIDS
came from the LATIN word
flavous
FLAVONOIDS
flavous means
yellow
FLAVONOIDS
6-membered heterocyclic ring
pyrones
FLAVONOIDS
5-membered heterocyclic ring
aurones
FLAVONOIDS
open chain isomeric form
chalcones
FLAVONOIDS
Philippine sources of flavonoids
Aratiles
Atis
Balingbing
Bignay
Chico
Santol
Sampalok
Katmon
Kamias
Duhat
FLAVONOIDS
% yield
wt of residue / wt of sample x 100
FLAVONOIDS | PHYSICAL TEST
- greenish black
- smooth thin film
- strong fruity odor in ethyl acetate
Voacanga globosa
FLAVONOIDS | SOLUBILITY TEST
GLYCONES are soluble in what reagents
water, acetone
FLAVONOIDS | PHYSICAL TEST
GLYCONES are insoluble in what reagents
ether, chloroform
FLAVONOIDS | PHYSICAL TEST
AGLYCONES are soluble in what reagents
acetone
ether
chloroform
FLAVONOIDS | PHYSICAL TEST
AGLYCONES are insoluble in what reagent
water
FLAVONOIDS
possess both ____ and ____ properties that are dependent on the presence of glycoside portion and aglycone portion
polar and nonpolar properties
FLAVONOIDS | PHYSICAL TEST
Flavonoid glycosides are ____ and dissolve in water but insoluble in organic solvents like ether
polar soluble
FLAVONOIDS | PHYSICAL TEST
Flavonoid aglycones are soluble in ____ while they are sparingly soluble in water
organic solvents
FLAVONOIDS | TEST
3ml of extract + conc. HCl + magnesium turnings
SHINODA TEST
FLAVONOIDS | TEST
SHINODA test
red to pink color
FLAVONOIDS | TEST
ethanolic extract + NaOH
Alkaline reagent test
FLAVONOIDS | TEST
ALKALINE REAGENT test
intense yellow color
(disappeared after adding dilute HCl)
