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more general categories information about this item 10. Biology and Chemistry 10. Biology and Chemistry Biology and Chemistry (144) Research and Analysis Methods (20) description: US National Institute for Occupational Safety and Health (NIOSH) defines methods for sampling and analysis of contaminants in workplace air, and in the blood and urine of workers who are occupationally exposed. Using linked-data techniques, AFDSI imports test methods to create a NIOSH Analytical Methods ontology. complete name: Methods US NIOSH