The Office of the Vice President for Research (OVPR) has awarded graduate student Emma Markun the 2026 Innovation in Safety Award.  The award for exceptional, ground-breaking innovations that advance safety at the University of Iowa.

Markun developed and implemented a procedure for the safe transport of liquid nitrogen (LN₂) in elevators. Liquid nitrogen is the primary cryogenic liquid used in the Department of Chemistry. Cryogenic liquids continuously evaporate into gas and must be vented to prevent pressure buildup inside their containers. As liquid nitrogen vaporizes, it can displace oxygen in the surrounding air, creating dangerously low oxygen levels that pose serious health risks. This hazard is especially significant in elevators, where fresh-air circulation is limited.

To address this risk, Markun calculated the maximum volumes of liquid nitrogen that can be transported safely in occupied freight and passenger elevators. Based on these calculations, she developed a protocol for the unaccompanied transport of large containers.  She also implemented safety measures, including caution barriers, warning signage, and recommended alternate elevator routes, to communicate hazards and guide safe practices. In addition, Markun created educational materials, including elevator infographics and presentations for research groups, to increase awareness and ensure consistent implementation of the new procedure throughout the Department of Chemistry.

The procedure for safe transport of cryogenic liquids can serve as a model for other campus buildings where cryogens are transported via elevators.  Materials associated with the procedure, including signage and the standard operating procedure, are available to the wider campus community through the Chemical Safety and Responsibilities Stewards (CSARS) website, under “Other Resources.”