Biomedical Engineering Reference
In-Depth Information
Menhaden oil
Seal blubber oil
α
- Tocopherol/500
BHA/200
BHT/200
TBHQ/200
Apigenin
Taxifolin
Naringin
Naringenin
Rutin
Kaempferol
Quercetin
Morin
Myricetin
80
60
40
20
0
20
40
60
80
Mean % Inhibition of TBARS Formation
FIGURE 6.17
Effect of flavonoids and commercial antioxidants on 2-thiobarbituric acid
reactive products (TBARS) of refined, bleached, and deodorized seal blubber and menhaden
oils during accelerated storage at 65°C without light presence.
78
With permission.
Four catechins and rutin were isolated from buckwheat (
Fagopyriumesculentum
Moensch) by Watanabe
83
who examined their ability to scavenge peroxyl radicals
formed during AMVN-initiated oxidation of methyl linoleate. The catechins identi-
fied were (-)-epicatechin, (+)-catechin-7-O-
D-glucopyranoside, (-)-epicatechin
3-O-p-hydroxybenzoate, and (-)-epicatechin 3-O-(3,4-di-O-methyl) gallate. The rel-
ative antioxidant activities of these compounds were compared to BHA and quercetin
as shown in
Figure 6.18
.
With the exception of (-)epicatechin, the other catechins
exhibited antioxidant activity only slightly less effective than BHA. Subsequent
studies by Przybylski et al.
84
also confirmed the presence of antioxidants and radical
scavenging components in buckwheat seed extracts.
β
H
ERBSAND
S
PICES
Herbs and spices have traditionally been used to enhance the flavor of foods. Among
the important members of the Libaitae famly are rosemary, sage, oregano, and thyme.
Search WWH ::
Custom Search