299 articles from WEDNESDAY 6.5.2020

Scientists shed light on essential carbon-fixing machinery in bacteria

Scientists have been studying cyanobacteria and its many potential applications for decades, from cutting CO2 emissions to creating a substitute for oil-based plastics, but there wasn't a deep understanding of the full life cycle and metabolism of specialized compartments within these common bacteria—until now.

Outpatient COVID-19 clues

A new report offers insights that can help clinicians distinguish between patients with COVID-19 infections and those with other conditions that may mimic COVID-19 symptoms.

Arctic Edmontosaurus lives again: A new look at the 'caribou of the Cretaceous'

A new study further explores the proliferation of the most commonly occurring duck-billed dinosaur of the ancient Arctic as the genus Edmontosaurus. The findings reinforce that the hadrosaurs -- dubbed 'caribou of the Cretaceous' -- had a geographical distribution of approximately 60 degrees of latitude, spanning the North American West from Alaska to Colorado.

Shedding new light on nanolasers using 2D semiconductors

Scientists have discovered a process of physics that enables low-power nanolasers to be produced in 2D semiconductor materials. Understanding the physics behind lasers at nanoscale and how they interact with semiconductors can have major implications for high-speed communication channels for supercomputers and data centers.

Novel way to treat snakebite

Scientists demonstrate a completely new way of treating snakebites. The team have shown that the repurposing of an existing medicine, commonly used to treat mercury poisoning, is an effective oral therapy for the treatment of certain hemotoxic snakebites.

Shedding new light on nanolasers using 2-D semiconductors

In his latest line of research, Cun-Zheng Ning, a professor of electrical engineering in the Ira A. Fulton Schools of Engineering at Arizona State University, and his peers explored the intricate balance of physics that governs how electrons, holes, excitons and trions coexist and mutually convert into each other to produce optical gain. Their results, led by Tsinghua University Associate...

Using AI to map marine environments

Sonar is commonly used to map the ocean floor, and seabed composition (e.g. mud, clay or rock) affects the way the sound is reflected back. Salinity, depth and water temperature also affect how sound waves are propagated through water.

How small chromosomes compete with big ones for a cell's attention

From avocado plants to baker's yeast, humans to zebras, sexually reproducing organisms must create germ cells that contain half the number of chromosomes found in a typical body cell. When these germ cells—such as sperm and egg—come together during fertilization, the regular number of chromosomes is restored.

UK scientists being drawn into 'very unpleasant' political situation

Colleagues raise concerns after Prof Neil Ferguson stepped down from advisory roleCoronavirus – latest updatesSee all our coronavirus coverageScientists who advise the government on its coronavirus strategy have warned they are being drawn into politics after the leading infectious disease modeller Prof Neil Ferguson stepped down as one of the cabinet’s most prominent advisers.Ferguson, the...

The Guardian view on an NHS coronavirus app: it must do no harm | Editorial

Smartphones can be used to digitally trace Covid-19. But not if the public don’t download an app over privacy fears – or find it won’t work on their deviceThe idea of the NHS tracing app is to enable smartphones to track users and tell them whether they interacted with someone who had Covid-19. Yet this will work only if large proportions of the population download the app. No matter how...

Cold air rises—what that means for Earth's climate

Conventional knowledge has it that warm air rises while cold air sinks. But a study from the University of California, Davis, found that in the tropical atmosphere, cold air rises due to an overlooked effect—the lightness of water vapor. This effect helps to stabilize tropical climates and buffer some of the impacts of a warming climate.