To: Jeffrey L. Henken who wrote (1140 ) 11/6/1997 12:13:00 AM From: julio gonzalez Read Replies (3) | Respond to of 4356
It seems to me that the ever increasing danger of disease causing bacteria and protozoa in our food supply has caused us to forget that there is an excellent reason to use ozone to wash fruit and vegetables with besides it ability to kill microbes. Washing fruits and vegetables with ozonated water will strip many insecticides, herbicides, and fungicides that are present on the surface to these foods. The surfaces harbor most of these chemicals many which are applied after harvesting to retard mold, spoilage, and ripening. Ozone is a powerful oxidizing reagent that is used in the laboratory to cleave carbon-carbon double bonds at low temperatures at high speed. Carbon-nitrogen double bonds and a whole host of other structures are susceptible to oxidation by ozone. Most insecticides, herbicides, and fungicides are large complex organic molecules with numerous sites that can be oxidized. Once a molecular site on one of these molecules is oxidized the structure tends to become water soluble. Captan, one of the most prevalent (and dangerous] fungicides has an exposed carbon-carbon double bond on its main indole ring and it is therefore quickly degraded by ozone. The polychloro compounds such as chlordan, heptachlor, and chlordane have exposed carbon-carbon double bonds and are also made short work of by ozone. Other indirect methods of freeing the surface from the pesticides are at work also. The organic exterior of the fruit or vegetable is subject to a small layer of uniform oxidation. This causes the surface to be more 'polar' and allows water to 'slip' between the fruit or vegetable surface and other larger organic molecules forcing them into water suspension . Plenty evidence is accumulating that pesticides disrupt complex systems in our bodies by acting as imposters to hormonal receptor sites, with long term consequences such as cancer, immune system defects, and neurological disturbances. As an aside, Irradiation of food will not strip away the pesticides adhering to them.