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United States Department of Agriculture

Agricultural Research Service

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AFSRC Picture of the Week, February 12, 2007
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Employee freezes plant samples using liquid nitrogen

Robert Arnold (Biological Science Lab Technician) quick freezes field plant samples by immersing them in liquid nitrogen. The samples will be analyzed for secondary metabolites at AFSRC where scientists are studying, in collaboration with Mountain State University, the chemical qualities of medicinal plants.

Photo by Jorge Ferreira

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Last Modified: 2/15/2007
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