showed that CLA oxidized faster than linoleic acid (LA) because CLA has a conjugated double bond
which is more vulnerable to autoxidation than a nonconjugated double bond.
CLA is a collective term for geometric and positional isomers of linoleic acid, and all these isomers have a conjugated double bond
instead of the methylene-separation (Schmid et al., 2006).
The ability of carotenoids to quench singlet oxygen has been linked to the conjugated double bond
system, the maximum efficiency being shown by carotenoids with nine or more conjugated double bonds
(Foote et al., 1970).
It can be prepared by a process comprising the following steps: alcoholyzing a drying oil with a polyol; adding successively, to the product from the first step, a dibasic anhydride, an unsaturated fatty acid containing a conjugated double bond
and an epoxy resin, and esterifying to obtain an epoxy polyester; and copolymerizing the epoxy polyester and an acrylic monomer.
The conjugated double bonds
and N, O, S atoms in the organic molecules help to form p-d bonds between the inhibitor and metal resulting from overlap of p-electrons to the 3d vacant orbital of metal atoms, which can enhance the adsorption of the inhibitors on the metal surface .
The deep red colour of lycopene and its antioxidant property is due to the presence of these 11 conjugated double bonds
and due because of this reason lycopene is used in food coloring.
Tung oil dries rapidly but it discolors rapidly due to the presence of the three conjugated double bonds
, and it is expensive.
Some of the earliest commercial anodic ED coatings were automotive primers based on natural oils with conjugated double bonds
(such as dehydrated castor oil and linseed oil) that were reacted with maleic anhydride.
This suggests that the conjugated double bonds
became longer in the order [N.sub.3.sup.-] > [SCN.sup.-] > [OH.sup.-].
Carotenoids are long carbon molecules with central conjugated double bonds
. Although lutein and zeaxanthin have the same number of double bonds, zeaxanthin has 11 conjugated double bonds
but lutein's eleventh double bond forms a more chemically reactive allylic hydroxyl end group.
Similar oxygen-pressure-dependent behavior may be shown by other compounds containing many conjugated double bonds