The phrase "a barrier over" is correct and usable in written English.
It can be used to describe an obstacle or hindrance that is positioned above or across something else.
Example: "The construction crew erected a barrier over the road to prevent access during the repairs."
Alternatives: "a barrier across" or "a barrier above".
Its unique formulation with stannous fluoride quickly creates a barrier over sensitive areas of your teeth, so you can spend your summer worrying about nothing more than what flavor of ice cream to try next.
At least one facet of learning was clearly observed in the present investigation - snakes stopped striking at the fish below a barrier over time.
As seen in Fig. 5A, the Ins peptide backbone "leaps upward" from p6 to p8, relative to the β-sheet floor of the groove because residues 73W and 147W in the H2-Kd molecule, located across from each other, form a barrier over which the antigenic peptide must "climb" 29.
Taped seams help keep the water out of the wetsuit by providing a barrier over the seams.
One way to build a bunker is to spawn a barrier, tip it over and set up a machine - gun turret in it.
The dirt road we were on ran through the barbed-wire fence and continued past the pieces of recycled train-track welded into a vehicle barrier, over a dry creek bed, and on into Mexico.
Officials said total fencing would amount to 670 miles by the end of 2008, establishing a natural and a manufactured barrier over the heaviest illegal traffic areas from the Pacific Ocean to the Texas-New Mexico border.
Kfir et al. [21] also used a barrier membrane over the synthetic bone graft substitute and autologous fibrin.
The values of corrosion current density (I corr) decreased in the presence of PSCs which suggests that the rate of electrochemical reaction was reduced due to the formation of a barrier layer over the iron surface by the inhibitor molecule.
A barrier beach over which runs the A354 road connects it to Chesil Beach and the mainland.
If FSS is placed at a mine site as a hydrologic barrier over pyritic refuse, it would interact with acidic mine water at the bottom and soil water at the top of the FSS.
