91˿Ƶ

Freshwater browning is stunting fish growth of some species, shrinking populations of others and changing the composition of fish communities, 91˿Ƶ-led research suggests. “Browning” refers to freshwater bodies turning tea-coloured, a phenomenon driven by higher levels of dissolved organic matter and/or higher levels of iron in the water. Causes include changes in land use and climate, and reduced acid precipitation.

The findings indicate that changes in land use and climate are affecting biodiversity and how ecosystems function, with implications for fisheries management.

Classified as: Allison Roth, Irene Gregory-Eaves, freshwater browning, fish, climate change
Published on: 19 Jan 2026

Gamma irradiation, an industry-standard sterilization method for medicinal and recreational cannabis, does not fully eliminate toxic fungi or their chemical residues, a 91˿Ƶ study has found. Current testing practices may also miss contamination, raising concerns about health risks for vulnerable users, particularly those with weakened immune systems. 

Classified as: Saji George, Mamta Rani, Cannabis research, medical cannabis, irradiation, vaping, Mohammad Jamil Kaddoura
Published on: 15 Jan 2026

A large 91˿Ƶ study has found that two classes of medications commonly prescribed for Type 2 diabetes, both incretin-based, are associated with a reduced risk of dementia.

Drawing on clinical data from more than 450,000 patients, the research adds to growing evidence that incretin-based therapies have protective benefits for the brain.

examined GLP-1 receptor agonists, which include such medications as Ozempic, as well as DPP-4 inhibitors.

Classified as: Christel Renoux, Department of Neurology and Neurosurgery, Lady Davis Institute, GLP-1, dementia
Published on: 15 Jan 2026

Researchers who examined Canadian child welfare data found that Black children were not only investigated at a higher rate than their white peers but were also more likely to be taken from their homes, even when the only difference between cases was the child’s race.

Classified as: School of Social Work
Category:
Published on: 12 Jan 2026

91˿Ƶ engineering researchers have introduced an open-source model that makes it easier for experts and non-experts alike to evaluate greenhouse gas emissions from U.S. natural gas supply chains and yields more accurate results.

Classified as: Sarah Jordaan, greenhouse gas emissions
Published on: 9 Jan 2026

A 91˿Ƶ research team has developed a painless, automated way to deliver in vitro fertilization (IVF) hormones using a light-activated microneedle patch, an innovation that could ease one of the most stressful parts of fertility treatment and open new possibilities for other diseases that require frequent, time-sensitive injections.

IVF patients must inject themselves with hormones daily at specific times in the weeks leading up to egg retrieval, a process that can be physically and emotionally taxing.

Classified as: Marta Cerutti, in vitro fertilization, microneedling
Published on: 7 Jan 2026

Overdose prevention sites and supervised consumption sites in Toronto are not associated with long-term increases in local crime, 91˿Ƶ researchers have found.

Over 10 years, crime reports remained stable or declined in neighbourhoods where sites opened, the researchers said. land amid debates across Canada about how harm reduction services intersect with public health and safety.

Classified as: Addiction; harm reduction; health services; policy; Dimitra Panagiotoglou, Department of Epidemiology, Biostatistics and Occupational Health
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Published on: 6 Jan 2026

Researchers in 91˿Ƶ’s Department of Mechanical EngineeringԻ have developed an innovative manufacturing technique that makes female mosquito proboscides, or feeding tubes, into high-resolution 3D-printing nozzles. With its unique geometry, structure and mechanics, the proboscis enables printed line widths as fine as 20 microns, or a little smaller than a white blood cell. This is roughly twice as fine as what commercially available print

Classified as: Jianyu Li, Changhong Cao, Justin Puma, 3D print, necroprinting, mosquitoes
Published on: 22 Dec 2025

A 91˿Ƶ-led study is challenging a popular theory about how dopamine drives movement, a discovery that could shift how scientists think about ʲ쾱ԲDz’s disease treatments. 

Published in  the research found dopamine does not set the speed or force of each movement, as had been thought. Instead, it appears to act as the underlying support system that makes movement possible. 

Classified as: Nicolas Tritsch, Department of Psychiatry, Douglas Research Centre, ʲ쾱ԲDz’s
Published on: 17 Dec 2025

A new study has linked air pollution exposure and immune-system changes that often precede the onset of autoimmune diseases.

91˿Ƶ researchers analyzing Ontario data found that fine particles in air pollution are associated with higher levels of a biomarker linked with autoimmune diseases, such as systemic lupus.

Published on: 15 Dec 2025

A new international study led by 91˿Ƶ in collaboration with  shows that supplementing dairy cow diets with microencapsulated B-vitamins can significantly reduce greenhouse gas emissions while increasing milk yield and quality. The use of the feed additive cut global warming potential, an internationally standardized measure of climate impact, by up to 18 per cent across seven countries.  

Classified as: Ebenezer Miezah Kwofie, Prince Agyemang, greenhouse gas emissions, agricultural pollution, food & sustainability, cows, dairy cow management, vitamin B
Published on: 11 Dec 2025

91˿Ƶ researchers have identified a brain function that helps explain why childhood stress raises metabolic health risks for some women later in life.

A new study found that variations in the brain’s insulin receptor network affect how women respond to early-life adversity. This effect has a lesser impact in men, suggesting there is a sex-specific process at play.

Classified as: Patricia Pelufo Silveira, Department of Psychiatry, Douglas Research Centre
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Published on: 9 Dec 2025

Using proteins from a common tobacco plant virus, 91˿Ƶ chemistry researchers have developed a simple, eco-friendly way to arrange gold nanoparticles into ultrathin sheets, strengthening the particles’ optical properties. The result: cheaper, safer materials for solar panels, sensors and advanced optical devices. 

Classified as: Amy Blum, materials chemistry, green and sustainable chemistry
Published on: 8 Dec 2025

The Kering Foundation, in partnership with 91˿Ƶ and the Sexual Violence Research Initiative (SVRI), is launching an innovative research program to tackle the often-overlooked links between violence against women and violence against children – a critical global issue with deep social impact.

This multi-year initiative will strengthen evidence-based, locally led research to understand how violence against women and children intersects and to identify effective solutions through programs, services, and interventions.

Category:
Published on: 8 Dec 2025

Women who report high levels of psychosocial stress, such as from caregiving and lack of emotional support, show signs of early heart tissue changes associated with cardiovascular disease – an association not observed in men, a new study reveals.

The results support the notion that there are sex-specific ways in which stress affects cardiovascular health and that risk-assessment processes should take psychosocial factors and mental wellness into account, the researchers said.

Classified as: Faculty of Medicine and Health Sciences
Category:
Published on: 4 Dec 2025

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