1.   Without doubt the gutter press whirlwind contained no substance whatsoever.

2.   Apparently, the Accutane contains a substance, fenretinide, shown to kill cancer cells, notably cervical cancer and myeloid leukemia.

3.   -- Morel mushrooms contain a substance that is used in rocket fuel.

4.   According to researchers, chocolate contains substances that might mimic the euphoric effects of marijuana.

5.   But in an Olympic year, the flu can be an even bigger problem because cold medicines often contain banned substances.

6.   But the experts noted that calcium-rich vegetables contain substances like oxalates, phytates and other fibers that interfere with calcium absorption in the gut.

7.   But the Iraqis would be hard-pressed to explain what the chemicals were doing on warheads that Iraq said contained other substances.

8.   Deep Thought and Brain Gum, for example, contain substances similar to phosphatidylserine, a compound found in the brain that helps regulate neural functions.

9.   Especially after being warned that it contains a substance considered illegal by the International Olympic Committee.

10.   Elizabeth M. Whelan, who is president of the American Council on Science and Health, noted that many foods contain substances that cause cancer in rodents.