15/04/2019

Lead ammunition polluting Argentina

Pollution from lead ammunition causes environmental health problems in Argentina, and progress is underway to find viable replacements for lead shot, according to an overview of lead pollution from hunting in the country. ...

How bugs overcome host defenses

Bacterial pathogens must acquire nutrient metals from the host to survive and cause disease. To counter infection, hosts attempt to starve bacteria by hiding metals away in a process called "nutritional immunity." Bacteria ...

The arrestin-GPCR connection

G-protein coupled receptors (GPCRs) are the "inbox" of environmental messages in mammalian cells. Because of their central role in signaling pathways, mutations resulting in abnormal GPCR functions cause a wide variety of ...

The discrete-time physics hiding inside our continuous-time world

Scientists believe that time is continuous, not discrete—roughly speaking, they believe that it does not progress in "chunks," but rather "flows," smoothly and continuously. So they often model the dynamics of physical ...

Academics concerned about Singapore's 'fake news' law

Nearly 100 academics worldwide have expressed concern over Singapore's proposed law against "fake news", warning it could threaten academic freedom and hurt the city-state's ambition to become a global education hub.

Auction bids decline with intensity of competition: new research

Economists from the University of Sydney and the University of Technology Sydney (UTS) have co-authored a new study that challenges conventional thinking about auctions and is applicable to real-life bidding situations including ...

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