Biomedical Engineering Reference
In-Depth Information
TABLE 6.1
Bond Dissociation Energies for Selected
Hydrogen Bonds
Bond Energy
(kJ/mol)
Structure
R = part of a chain attached by a single carbon-carbon
bond.
due to higher energy requirement. The more damaging reaction is between the
excited sensitizer and ground state oxygen to form singlet oxygen (Equation 6.3).
Singlet oxygen has been shown to react with linoleic acid 1500 times faster than
ground state oxygen.
9
This very reactive component is considered the most important
initiator of the free-radical autoxidation of fatty acids. Exposure to light in the
presence of photosensitizer and oxygen can cause the formation of singlet oxygen
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