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SY or NS supplement could be considered to be applied for Se-enriched egg production.In May 1845 HMS Terror and HMS Erebus left England under the command of Sir John Franklin to find the Northwest Passage linking the north Atlantic and Pacific Oceans. The ships had been specially equipped for arctic conditions with central heating, auxiliary steam engines and reinforced steel bows to cut through the ice, however, despite these modern additions neither the vessels nor any of the 129 crew members would ever return. Recently the wrecks of