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National Laboratory for Genetic Resources Preservation
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Fort Collins, Colorado - Tanks of liquid nitrogen store semen from cows and other animals at -320 degrees F at the National Laboratory for Genetic Resources Preservation. The lab is part of the Department of Agriculture. Beth Krehbiel (right) a graduate student at Colorado State University, and animal geneticist Harvey Blackburn examine the contents of one cyro tank. Blackburn enables a clear view of the contents by vacuuming escaping nitrogen vapor produced as the liquid nitrogen boils.
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