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Science News Archive September 2019 - Page 24


Page 24 of 43

Male Trinidad guppies find food thanks to females

In a recent study, male Trinidad Guppies were found to reach more novel food patches when in the presence of females. In contrast, female foraging was independent of male presence. The researchers suggest that life in a group can be advantageous, allowing individuals to share information and find food more easily.

SourceForschungsverbund Berlin·JournalJournal of Animal Ecology·DateSep 13, 2019

Multidrug resistance: Not as recent as we thought

Researchers from Osaka University found that a relatively ancient Haemophilus influenzae drug efflux pump AcrB confers resistance to antibiotics similar to its more evolved counterparts. The study highlights the evolution and mechanism of multidrug efflux systems, suggesting a 'one size fits all' approach is not suitable.

SourceOsaka University·JournalCommunications Biology·DateSep 13, 2019

Extinction of Icelandic walrus coincides with Norse settlement

A study published in Molecular Biology and Evolution reveals that the Icelandic walrus went extinct shortly after Norse settlement around 870 AD, likely due to commercial hunting and ivory trade. The research used ancient DNA analyses and C14-dating to demonstrate the existence of a unique population of Icelandic walruses.

How IL-6 allows the immune response to develop for a key cell, the T follicular helper

A preclinical study shows that IL-6 protects T follicular helper cells from deleterious effects of IL-2 by interrupting a feedback loop, allowing them to receive sustained T-cell receptor stimulation. This finding has important therapeutic implications for autoimmune diseases like lupus and may lead to better treatment options.

SourceUniversity of Alabama at Birmingham·JournalScience Immunology·DateSep 13, 2019

The enigma of Bronze Age tin

Researchers use natural sciences methods to determine geographic origin of Bronze Age tin artifacts from Israel, Turkey, and Greece, disproving Central Asian source and confirming Europe as the origin of ingots. The study highlights complex trade networks between Europe and Eastern Mediterranean during the Bronze Age.

SourceHeidelberg University·JournalPLOS ONE·DateSep 13, 2019

Environmental pollution in China begins decreasing

A recent international research study published in Science Advances journal shows that environmental awareness and investments in China over the past decade have led to a weakening of the connection between economic growth and pollution. Despite this progress, major challenges remain, including increasing greenhouse gas emissions.

SourceUniversity of Gothenburg·JournalScience Advances·DateSep 13, 2019

Blink and you'll miss it

Scientists have successfully observed and controlled fast-paced chemical reactions using light, which could lead to new optical nanotechnology. The method uses ultrafast techniques to visualize the reaction, offering insights into molecular interactions and potential applications in materials design.

SourceUniversity of Tokyo·JournalNature Communications·DateSep 13, 2019

Study examines patterns of violence among young urban males

The study found that high levels of social support were associated with reduced risk behaviors, and that mentoring was linked to a lower likelihood of gang involvement. These findings suggest understanding the associations between different types of violence and their related risk factors may help in prevention efforts.

SourceJAMA Network·JournalJAMA Network Open·DateSep 13, 2019

Land restoration in Latin America shows big potential for climate change mitigation

A new study maps 154 land restoration projects in Latin America, revealing their potential to mitigate climate change through forest restoration. The research highlights the importance of natural regeneration and assisted regeneration methods for increasing vegetation cover and biodiversity.

Children of refugees with PTSD are at higher risk of developing psychiatric disorders

A large register study shows that refugee children with parents having PTSD are at a significantly higher risk of contact with the psychiatric system before turning 18. The researchers highlight the need for greater focus on this problem and early measures to support these vulnerable children.

Stem cell researchers reactivate 'back-up genes' in the lab

Researchers have unraveled a mechanism to reactivate 'back-up genes' on the inactive X chromosome, which could help treat Rett syndrome and other X-linked disorders. The study found that different genes require varying amounts of time to become active again, with location and proteins playing key roles.

SourceKU Leuven·JournalGenome Research·DateSep 12, 2019