1.   Salt is spread on roads in cold weather to prevent the formation of ice.

2.   So water softeners are added to washing powders to prevent its formation.

3.   Whether the ability to chelate free iron and so prevent the formation of the hydroxyl radical is important remains to be seen.

4.   Another potential improvement involves coating stents with an immune-suppressing drug that prevents the formation of scar tissue.

5.   Antisense drugs are essentially short sequences of genetic code that work by preventing formation of specific proteins that cause or contribute to disease.

6.   But because of the bleeding, the doctors could not prescribe adequate amounts of anti-coagulant drugs to prevent formation of blood clots in the device.

7.   Dr. Mariano said elastic stockings would be used to help prevent clot formation.

8.   Except for taking a blood thinner to prevent the formation of blood clots, he said he suffers no side effects from the surgery.

9.   Gray said his team has had difficulty in using anti-coagulant drugs to prevent formation of a blood clot in the device.

10.   Genzyme Corp. failed to win the backing of a Food and Drug Administration advisory committee for its Sepracoat to help prevent scar tissue formation during surgery.