Scientific news in small doses

A few milligrams of all the scientific news of the week

Posted at 7:00 am

Eric-Pierre Champagne

Eric-Pierre Champagne
The press

Bees altered by antibiotics

As more and more antibiotics are used to treat different crops, it seems that this process is especially affecting the feeding capacity of bees. This is at least the conclusion of a study conducted by a team at Emory University in Atlanta, which has just been published in the journal Proceedings of the Royal Society B. Researchers tested the effects of streptomycin, an antibiotic, on febrile bumblebees (Bombus impatiens). This antibiotic is used especially by apple and pear growers. Bumblebees exposed to streptomycin had more difficulty finding food, which in turn can affect the pollination needed to produce fruits and vegetables. For several years, the decline in pollinating insects has been a particular concern for scientists.

Quiz

Is climate change responsible for floods in British Columbia?


PHOTO MARTIN TREMBLAY, PRESS FILES

Extreme weather conditions have caused historic flooding in British Columbia.

Yes, according to Xuebin Zhang, an Environment Canada scientist. A study on the subject has recently been completed, which has not yet been peer-reviewed. According to the researcher, climate change has “contributed substantially” to the atmospheric rivers that hit British Columbia in the fall. These meteorological phenomena caused torrential rains for several days in the province.

The number

0.81


PHOTO JOSH LANDIS, ARXIUS AGENCE FRANCE-PRESSE

Icebergs are suffering from global warming.

The average global surface temperature in February was 0.81 ℃ warmer than the average recorded during the 20th century.i century, the National Oceanic and Atmospheric Administration recently announced in the United States. The month of February 2022 was, therefore, at 7i range of the hottest in 143 years, since these data are recorded. In addition, according to the agency, it is “virtually certain” that 2022 will be among the 10 hottest years since 1880.

More pollutants in recycled bottles


PHOTO FRANÇOIS ROY, ARCHIVES THE PRESS

Recycled bottles would contain a higher concentration of different chemicals than new bottles.

While recycling plastic bottles is good news for the environment, scientists are calling for better processes to eliminate the chemicals that can be found in them. This is the finding of a study published in The Journal of Hazardous Materials, which is actually a meta-analysis of 91 studies on contaminants found in plastic bottles. Researchers at Brunel University in London were able to establish that recycled bottles, made of polyethylene terephthalate (PET), contained a higher concentration of different chemicals than new bottles. In 18 of them, the concentrations exceeded the standards.

Pain: different neural reactions in men and women


PHOTO FIZKES, GETTY IMAGES

The prevalence of chronic pain is higher in women.

Do pains feel differently depending on whether you are male or female? Researchers at Carleton University and Laval University have recently been interested in the issue, studying the neural mechanisms related to chronic inflammatory pain. Tests have shown that these neural mechanisms vary by sex. According to scientists, this is what especially explains why the prevalence of chronic pain is higher in women. One of the researchers ’wishes is that research on new pain treatments take these gender differences into account to find more appropriate treatments for both men and women. The study was published in the journal Brain.

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