Barrier

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Barrier

1. See: Trade barrier.

2. See: Barrier Option.
References in periodicals archive ?
These chemical barriers, together with physical ones, are to be systematically surveyed by new environmental DNA techniques that will map the occurrence of salmon, trout and invertebrates.
The plastic rim was sprayed with Snail & Slug Away, and air-dried prior to introducing the slug; thus, in this study the slugs were confronted with a chemical barrier rather than a physical barrier.
Chemical barriers. Chemical barriers, both organic and inorganic, are less effective.

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