1.   Another factor that needs to be considered is the fate of the antibody titres once their formation has been triggered by one or more of H pylori antigens.

2.   An explosion in commercial air traffic may be triggering formation of high-altitude clouds that trap heat and could worsen global warming.

3.   But they believe the same bacteria that causes gum disease may also trigger formation of the plaque that blocks or hardens arteries.

4.   In such conditions the addition of a small amount of water vapor from an aircraft can trigger the formation of a contrail or a cloud.

5.   Onions are divided roughly into two classes -- short-day and long-day -- depending on the daylight hours needed to trigger bulb formation.

6.   Progenitor, of Columbus, Ohio, specializes in work with receptor proteins that trigger the formation of the hormone.

7.   Somehow, they infer, the lens implantation told the fish genes to trigger the formation of complete eyes.

8.   The collisions create dense dust clouds that trigger star formations, but the clouds are so opaque that the Hubble is blind to them.

9.   The collisions create dense dust clouds that trigger star formations, but the clouds are so opaque that the Hubble Space Telescope is blind to them.

10.   They have the most common form of SCID, caused by a defective gene that blocks a cell receptor needed to trigger lymphocyte formation.