Dizing agents

Osmate esters are fairly stable but are readily cleaved m the presence of an 0x1 dizing agent such as tert butyl hydroperoxide... 

The redox properties of quinones are important to the functioning ( living cells, where compounds called ubiquinones act as biochemical ox dizing agents to mediate the electron-transfer processes involved in energ production. Ubiquinones, also called coenzymes Q, are components of tli cells of ail aerobic organisms, from the simplest bacterium to humans. They are so named because of their ubiquitous occurrence in nature. 

The biotransformation of the toxic oil contaminant PAP to the L-tryptophan contaminant PAA may link TOS and EMS to a common chemical agent, namely PAA. Both PAP and PAA are metabolized further to the p-hydroxylated forms, FIPAP and FIPAA (Figure 7). Such compounds readily autoxi-dize to the benzoquinoneimine, which is reactive toward nucleophiles such as the sulfhydryl and amino moieties present on many biological molecules. Thus, upon oxidization, FIPAA and FIPAP may react with macromolecules as a hapten to form immunogenic targets. HPAA possesses some chemical properties... 

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