Featured Post from University of Delaware

Research: Add space salad to the risks astronauts face

Jan 22, 2024

3 min

University of Delaware researchers grew lettuce under conditions that imitated the weightless environment aboard the International Space Station and found those plants were actually more prone to infections from Salmonella.

It’s been more than three years since the National Aeronautics and Space Administration made space-grown lettuce an item on the menu for astronauts aboard the International Space Station. Alongside their space diet staples of flour tortillas and powdered coffee, astronauts can munch on a salad, grown from control chambers aboard the ISS that account for the ideal temperature, amount of water and light that plants need to mature.

But as the UD researchers discovered, there is a problem. The International Space Station has a lot of pathogenic bacteria and fungi. Many of these disease-causing microbes at the ISS are very aggressive and can easily colonize the tissue of lettuce and other plants. Once people eat lettuce that’s been overrun by E. coli or Salmonella, they can get sick.

With billions of dollars poured into space exploration each year by NASA and private companies like SpaceX, some researchers are concerned that a foodborne illness outbreak aboard the International Space Station could derail a mission.

In the new study by UD's team, published in Scientific Reports and in npj Microgravity, researchers grew lettuce in a weightless environment similar to that found at the International Space Station. Plants are masters of sensing gravity, and they use roots to find it. The plants grown at UD were exposed to simulated microgravity by rotation. The researchers found those plants under the manufactured microgravity were actually more prone to infections from Salmonella, a human pathogen.

Stomata, the tiny pores in leaves and stems that plants use to breathe, normally close to defend a plant when it senses a stressor, like bacteria, nearby, said Noah Totsline, an alumnus of UD’s Department of Plant and Soil Sciences who finished his graduate program in December. When the researchers added bacteria to lettuce under their microgravity simulation, they found the leafy greens opened their stomata wide instead of closing them.

“The fact that they were remaining open when we were presenting them with what would appear to be a stress was really unexpected,” Totsline said.

Totsline, the lead author of both papers, worked with plant biology professor Harsh Bais as well as microbial food safety professor Kali Kniel and Chandran Sabanayagam of the Delaware Biotechnology Institute. The research team used a device called a clinostat to rotate plants at the speed of a rotisserie chicken on a spinner.

“In effect, the plant would not know which way was up or down,” Totsline said. “We were kind of confusing their response to gravity.”

Additionally, Bais and other UD researchers have shown the usage of a helper bacteria called B. subtilis UD1022 in promoting plant growth and fitness against pathogens or other stressors such as drought.

They added the UD1022 to the microgravity simulation that on Earth can protect plants against Salmonella, thinking it might help the plants fend off Salmonella in microgravity.

Instead, they found the bacterium actually failed to protect plants in space-like conditions, which could stem from the bacteria’s inability to trigger a biochemical response that would force a plant to close its stomata.

“The failure of UD1022 to close stomata under simulated microgravity is both surprising and interesting and opens another can of worms,” Bais said. “I suspect the ability of UD1022 to negate the stomata closure under microgravity simulation may overwhelm the plant and make the plant and UD1022 unable to communicate with each other, helping Salmonella invade a plant.”

To contact researchers from the team, visit the profiles for Bais or Kniel and click on the contact button.

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Harsh Bais

Professor, Plant and Soil Sciences

Prof. Bais conducts research in plant signaling – how plants recognize and communicate with one another.

Plant-Microbe InteractionsPlant BiologyPlant SignalingRoot ExudationPlant and Soil Sciences and Horticulture

Kali Kniel

Professor, Microbial Food Safety

Prof. Kniel’s laboratory explores issues of food safety and public health that involve transmission of viruses and pathogenic bacteria.

Food SystemsPathogenic BacteriaFood Safety Public HealthMicroorganisms

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May 8, 2026

4 min

Survey says: Senior leaders are using AI, but they could use more direction

Over the years, study upon study has shown that senior leaders are slower to adapt to new technology – email, the Internet and social media – than younger employees. That’s not necessarily so with AI, according to the University of Delaware’s Saleem Mistry. Mistry, associate professor of management at UD's Alfred Lerner College of Business & Economics, recently conducted a survey of more than 200 university alumni, 75% of which had more than 16 years of professional experience. He found that senior leaders are actively adopting AI to solve their biggest challenges. However, they are doing so largely without structured support or guidance. Here are four findings from Mistry's survey that shows how AI is actually being used at the top. Senior Leaders Are Overwhelmingly Self-Taught Mistry said his most glaring finding is the gap between high AI adoption among senior leaders and the near-total absence of formal corporate support. Although a majority use these tools, they are almost entirely self-taught, which highlights visible opportunity that organizations aren’t really steering the AI conversation for leaders: High usage. 62% of all senior leaders surveyed use AI tools "regularly" or "occasionally" in their work. Training gap. Of those users, an overwhelming 80% report their organization provides "Never" or only "Sometimes" (mostly never) adequate training. Mistry said this shows that leaders from VP level down are using tools like ChatGPT and Copilot informally to keep up with heavy workloads, without any real organizational guidance. The stakes are high. In the survey, a vice president of legal was using AI for compliance tasks and a manager of three was using it for performance reviews, both with no formal training. “These are senior leaders handling sensitive work while essentially figuring it out on their own,” Mistry said. There is a clear ladder of AI use Leaders are not using AI randomly. There is a clear progression in how they use it, moving through three levels. • Tier 1 (The Drafters) This is the most common starting point. Leaders use AI to improve writing and communication. They draft emails, shape documents, and refine tone. As one Director of Product put it, it helps him "polish phrasing" and adjust tone and voice. • Tier 2 (The Synthesizers) At this stage, leaders use AI to manage information overload. They summarize meetings, condense documents, and pull together research so they can keep up with large volumes of input. As one leader managing a team of 200 said, "Being a leader requires attention in a variety of areas. AI helps me manage the vast amounts of information I need to consume." • Tier 3 (The Architects) Here, leaders move beyond writing and summarizing. They use AI to automate parts of their work. This includes building agents, creating custom GPTs, or designing tools that track work and performance. One leader managing 300 people said, "It will eliminate half or more of my overhead." Managers and individual contributors use AI for different reasons People managers and individual contributors (IC) are using AI for very different reasons based on their roles. • For people managers, their main challenge is scale. They are overloaded with communication and administration, so they use AI to reduce noise and keep up. They lean heavily on summarization and tone adjustment tools. • For project leads and ICs, their focus is output. They use AI to produce work faster, including drafting content, building decks, writing code, or generating ideas. This difference reflects their jobs. One group is trying to keep up, the other is trying to produce more. It also shows that AI is not a single-use tool. Its value depends on the problem it is being used to solve. This difference reflects their jobs. One group is trying to keep up, the other is trying to produce more. It also shows that AI is not a single-use tool. Its value depends on the problem it is being used to solve. Resistance to AI is mostly intentional Among the 38 percent of leaders who do not use AI, resistance is usually not based on lack of awareness. It falls into three groups. • The Ethical Objectors. Some avoid AI due to concerns about its broader impact. • The Quality Skeptics. Some do not trust the output and feel it is not reliable enough for important work. • The Blocked. Some are not allowed to use AI due to company policy. Mistry concludes that there is a clear overall pattern: Leaders are using AI in practical ways, but mostly without structured support or guidance. “If it feels like you are figuring this out as you go without much help from your organization, that is consistent with what most leaders are experiencing,” Mistry said. To connect directly with Mistry and arrange an interview, visit his profile page and click on the "connect" button. Interested reporters can also email MediaRelations@udel.edu.

May 5, 2026

1 min

Hantavirus cruise ship outbreak: Epidemiologist discusses causes and challenges

A deadly outbreak of hantavirus on a cruise ship currently stuck off Cape Verde, Africa, has put the virus on the national radar for the first time since 1993. University of Delaware epidemiologist Jennifer Horney can talk about the potential for a larger outbreak and the challenges associated with responding to the emergency. There have been nearly 1,000 cases of hantavirus in the U.S. since surveillance began in 1993. That year, an outbreak of the severe respiratory disease in the four corners area of the U.S. Southwest was linked to domestic exposure to rodents, Horney said. Horney can discuss the following points in reference to the Dutch vessel M/V Hondius, which has seen three people die since departing from Argentina on April 1. • The response to this global public health emergency will be challenging given the cuts to U.S. public health and extensive leadership turnover at the Centers for Disease Control and Prevention. • Climate change and global transit likely contributed to the new cases, as rodent populations thrive during certain weather conditions. • When humans inhale rodent feces, urine or saliva, often when dust is aerosolized through cleaning, they can become infected. While symptoms may develop up to two months after exposure, the disease has a mortality rate of up to 50%. To reach Horney directly and arrange an interview, visit her profile and click on the "contact" button. Interested media can also send an email to MediaRelations@udel.edu.

May 6, 2026

2 min

Gritty like his city: How the Philadelphia Flyers' mascot went from punchline to sensation

How did Gritty, the fluffy, orange, menacing whatchamacallit that backs the Philadelphia Flyers, go from a punchline when he was rolled out in 2018 to one of sports' most well-known and beloved mascots? The University of Delaware's Matt Robinson took a shot, and scored, with some answers. Robinson, a professor of sport management at UD's Lerner College of Business & Economics, said Gritty embodies the tough attitude that Philadelphia is known for. Also, some of his bizarre features and personality traits go straight to the heart of the demeanor and history of the Flyers, who are currently battling their way through the NHL playoffs. Those are among the ingredients that go into marketing and launching a successful mascot. Robinson can discuss the following: • Why some mascots take off and others flop. After his launch, Gritty was ridiculed as a concept on late night TV and "Saturday Night Live." But he was still garnering billions of views on social media and millions in earned media for the franchise. The Flyers kept pushing the concept despite its early unpopularity, which led to his eventual success. "Any public relations is good public relations," Robinson said. • Mascots need to be authentic. Gritty embodies the team he represents and the city that team plays in. Robinson noted Philadelphia's "grit" and love of players who play hard, like the Broad Street Bullies – the nasty group of Flyers' players who led the team to two Stanley Cup wins in the 1970s. • The best mascots transcend sports. Robinson pointed to the film and character "Rocky," whose statue sits in the front of the city's Art Museum, as well as the city's reputation as one with a bit of an edge. "We're the ones who threw snowballs at Santa Claus," Robinson said, referring to the infamous 1968 incident when Philadelphia Eagles fans pelted Kris Kringle from the stands. • Players and coaches come and go, but the mascot stays the same. Mascots can be part of ticket sales and community engagement in the offseason, when players may not be in the city or moving to another via free agency. • Mascots offer an attachment point for fans that is not sport related. Kids respond to mascots and, from there, connection with the team, players and the sport can grow. To contact Robinson directly for an interview, visit his profile and click on the "contact" button. Interested reporters can also email MediaRelations@udel.edu.