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Livestock production efficiency is impaired by helminth infection which is ubiquitous in cattle, sheep and goats world-wide. It causes severely debilitating gastro-intestinal, respiratory and hepatic disorders, dependent on the infecting species. The treatment and prevention of helminth parasitism in livestock continues to rely almost exclusively on the use of anthelmintic drugs, an approach thre ...

"The multiple barrier concept is the cornerstone of all proposed schemes for underground disposal of radioactive wastes. The concept invokes a series of barriers, both engineered and natural, between the waste and the surface. Achieving this concept is the primary objective of all disposal programmes, from site appraisal and characterisation to repository design and construction. However, the perf ...