| The wall prevents detainees from meeting each other and is a barrier to easy access to the library. |
| The role of the geosphere itself as a chemical containment barrier is relatively difficult to evaluate. |
| Calendula helps to heal broken skin, and the oil in the salve creates a protective barrier that prevents mucous membranes from drying out. |
| Here, the barrier winds down a narrow alleyway used 350 years ago by sisters to drive cows out to pasture. |
| Non-ionic surfactants act as accelerators of diffusion in the cuticular wax barrier. |
| On three sides 12-metre high walls form a barrier between the two factions. |
