chemical barriers


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chemical barriers

1. The chemical characteristics of certain areas of the body that oppose colonization by microorganisms. The acidity of gastric juice, for example, prevents colonization by most disease-causing germs.
2. A contraceptive cream, foam, jelly, or suppository that contains chemical spermicides.
See also: barrier
References in periodicals archive ?
The replacements of cyclodiene termiticides (some of the so-called 'organochlorine' ones) with alternative chemical barriers are not without occupational and public health risks.
Use chemical barriers to keep ants out Spraying, dusting, or soaking the outside perimeter of your home with one of the chemicals labeled for outdoor ant control may keep them out for four to six weeks.
The main interest in termite control is to accomplish complete and continuous chemical barriers wrapped around the walls and footings of the building's foundation, thereby forming a chemical barrier between the structure and the termite nest.

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