1.   Both substances are known as antioxidants because they protect cells from chemical attack that adds oxygen to their components.

2.   A number of studies are looking for ways to protect the cells of the optic nerve.

3.   But, for reasons not understood, the cells are not protected from the damaging effects of the treatment.

4.   He suggests that patients with retinal detachment be provided with oxygen immediately upon diagnosis to protect cells until the retina is reattached.

5.   If the factor was added before the toxin, dopamine cells were protected.

6.   In addition, special coatings are being developed to protect transplanted cells from attack by the immune system.

7.   In animal studies, researchers have found that melatonin strengthens the immune system, protects cells and might make us live longer.

8.   In test-tube and animal experiments, researchers have found that it protects cells, strengthens the immune system and slows the growth of some tumors.

9.   Kedes, however, on the advice of his doctor, admits to taking vitamin E, an anti-oxidant that seems to help protect cells from damage.

10.   Little is known about the metal-binding role, except that it seems to help protect cells from oxidative damage by excess copper.