While discussing the pilot's claims that all the " rubber " was dissolving, they are told that there is no actual rubber aboard a Phantom F-4, instead the material is " Polycron, " a synthetic substance with properties similar to human skin.
42.
At about this same time, Kuekes ( pronounced KEE-kus ) happened to make the acquaintance of James Heath, a chemist at the University of California at Los Angeles whose lab had been experimenting with tiny structures based on molecules of a synthetic substance called rotazane.
43.
Researchers say that an important advance will be artificial muscle, a synthetic substance that can contract and relax when electricity is applied, just like organic muscle . " Muscles are spectacular springs, shock absorbers, struts, brakes, and motors, all rolled up into a thin little tissue, " Full said.
44.
In the U . S ., the Organic Foods Production Act of 1990 " requires the Secretary of Agriculture to establish a National List of Allowed and Prohibited Substances which identifies synthetic substances that may be used, and the nonsynthetic substances that cannot be used, in organic production and handling operations ."
45.
:If the absolute structure of a synthetic substance is exactly the same as that of the naturaly derived substance then it is considered bioidentical and as long as it is very very pure then it is as " good " as and as " healthy " as the purified " natural " one.
46.
The Food and Drug Administration continues to follow the policy it set in 1993 : " FDA has not established a formal definition for the term'natural', however the agency has not objected to the use of the term on food labels provided it is used in a manner that is truthful and not misleading and the product does not contain added color, artificial flavors, or synthetic substances.
