Students blocked from US meeting

Delays cost Chinese-born University of Toronto graduate students visas

Written byDoug Payne
| 3 min read

Register for free to listen to this article
Listen with Speechify
0:00
3:00
Share

US border security recently prevented two Chinese-born University of Toronto environmental toxicology graduate students from presenting papers at the annual meeting of the Society of Environmental Toxicology and Chemistry (SETAC) in Austin, Texas. Despite applying early for visas, booking their hotel, purchasing air tickets, and preparing their posters and presentations for the sessions, scheduled for November 9–12, 2003, the two graduate students never left Canada.

The two students—Hang Xiao and Yushan Su—told The Scientist this week how, after receiving the invitation to SETAC on September 20, they found US Consular officials in Toronto concerned over any work involving toxic chemicals. But, Xiao said, “I only do some modeling research and [don't] use those so-called toxic chemicals at all.” Xiao studies how persistent organic pollutants partition between the air and organic surfaces, while Su studies environmental monitoring of the effect of pesticides on the environment.

SETAC's president sent officials a letter ...

Interested in reading more?

Become a Member of

The Scientist Logo
Receive full access to more than 35 years of archives, as well as TS Digest, digital editions of The Scientist, feature stories, and much more!
Already a member? Login Here

Meet the Author

Share
Image of a woman with her hands across her stomach. She has a look of discomfort on her face. There is a blown up image of her stomach next to her and it has colorful butterflies and gut bacteria all swarming within the gut.
November 2025, Issue 1

Why Do We Feel Butterflies in the Stomach?

These fluttering sensations are the brain’s reaction to certain emotions, which can be amplified or soothed by the gut’s own “bugs".

View this Issue
Olga Anczukow and Ryan Englander discuss how transcriptome splicing affects immune system function in lung cancer.

Long-Read RNA Sequencing Reveals a Regulatory Role for Splicing in Immunotherapy Responses

Pacific Biosciences logo
Research Roundtable: The Evolving World of Spatial Biology

Research Roundtable: The Evolving World of Spatial Biology

Conceptual cartoon image of gene editing technology

Exploring the State of the Art in Gene Editing Techniques

Bio-Rad
Conceptual image of a doctor holding a brain puzzle, representing Alzheimer's disease diagnosis.

Simplifying Early Alzheimer’s Disease Diagnosis with Blood Testing

fujirebio logo

Products

Eppendorf Logo

Research on rewiring neural circuit in fruit flies wins 2025 Eppendorf & Science Prize

Evident Logo

EVIDENT's New FLUOVIEW FV5000 Redefines the Boundaries of Confocal and Multiphoton Imaging

Evident Logo

EVIDENT Launches Sixth Annual Image of the Year Contest

10x Genomics Logo

10x Genomics Launches the Next Generation of Chromium Flex to Empower Scientists to Massively Scale Single Cell Research