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88 articles from PhysOrg

Study finds evidence of bovine TB in 15% of rhinos at South African national park

The largest study ever conducted on a free-ranging population of rhinoceroses reveals that about one in every seven rhinos in a key South African national park has been infected with Mycobacterium bovis (M. bovis), the pathogen that causes bovine tuberculosis (bTB). The finding shines new light on the potential for diseases to disrupt global conservation efforts, and potentially increase risk to...

NASA to launch six small satellites to monitor and study tropical cyclones

NASA is launching the first two of six small satellites no earlier than June 12, to study the formation and development of tropical cyclones almost every hour—about four to six times more often than is possible with current satellites. This is the first of three CubeSat launches for NASA's Time-Resolved Observations of Precipitation structure and storm Intensity with a Constellation of Smallsats...

New study shows how 'green islands' help forests regenerate after fire

Thanks to climate change, high-elevation forests in the Central Cascade mountains of the Pacific Northwest are burning more frequently and expansively than in the recent past, prompting researchers and fire managers to question whether forests will be able to recover from these emerging fire patterns and whether they will require human assistance to do so.

Asteroid samples offer chance to study chemically pristine solar system materials

Hayabusa2 is an asteroid sample-return mission operated by the Japan Aerospace Exploration Agency (JAXA), which investigated the asteroid Ryugu. Carbonaceous asteroids like Ryugu are important because they are thought to preserve the most pristine, untainted materials in the solar system: a mixture of minerals, ice and organic compounds. The Haybusa2 mission is the first to collect samples from a...

New clues about how hot Jupiters form

Since the first hot Jupiter was discovered in 1995, astronomers have been trying to figure out how the searing-hot exoplanets formed and arrived in their extreme orbits. Johns Hopkins University astronomers have found a way to determine the relative age of hot Jupiters using new measurements from the Gaia spacecraft, which is tracking over a billion stars.

The link between wildfires and drinking water contamination

Following a devastating wildfire in 2018 that raged through Paradise, California, volatile organic compounds (VOCs) were found to be contaminating the town's water—and scientists suggest this problem may be widespread in other fire-prone areas. A feature article in Chemical & Engineering News, an independent news outlet of the American Chemical Society, examines how plastic pipes may be a key...

Scheduling NASA's Webb telescope's science

In the lead-up to the release of Webb's first full-color images and spectroscopic data on July 12, the Webb team is now in the last phase of commissioning the science instruments. The first two instrument modes, NIRCam imaging and NIRISS imaging, have been declared ready for science; watch the "Where is Webb" page as the team works their way through the other 15 instrument modes.

Yellowstone's history of hydrothermal explosions over the past 14,000 years

While much of public attention on Yellowstone focuses on its potential to produce large supereruptions, the hazards that are much more likely to occur are smaller, violent hydrothermal explosions. Hydrothermal explosions occur when near-boiling water suddenly flashes into steam, releasing large amounts of energy. The energy release fractures the rock downward, often leaving behind a crater. The...

Scientists offer solutions to global phosphorus crisis that threatens food and water security

Phosphorus is an essential but often overlooked resource, which is vital for life on Earth and is extracted from phosphate rock for use in crop fertilizers, livestock feeds and food additives. A major new report by scientists warns that global mismanagement of this finite nutrient is causing twin crises, brought into sharp focus with fertilizer prices skyrocketing in recent months.

A new method for the fast detection of a key antiviral

Interferons are proteins that constitute an important part of our natural defense systems. These proteins also exhibit a remarkable antiviral activity. The recombinant human interferon α2b (rhIFNα2b) was approved by the U.S. Food and Drug Administration in 1986. It has been used ever since as an antiviral agent for the treatment of hepatitis B and hepatitis C. Despite its widespread...

Yellow peas show promising results as the basis for tomorrow's cheese

Humans have used milk to make cheese for millennia. However, climate change and sustainability concerns are prompting us to look towards the plant kingdom for the cheeses of the future. New research from the University of Copenhagen points to the modest yellow pea, which with its high nutritional content and sustainable cultivation attributes, could become tomorrow's plant-based cheese of choice.

Electron-phonon coupling-assisted universal red luminescence of o-phenylenediamine-based carbon dots

Carbon dots (CDs) are new carbon-based photoluminescence (PL) nanomaterials with a core-shell motif. Due to their fascinating advantages, such as chemical inertness, high quantum yields (QYs), high water solubility, thermal stability, and excellent biocompatibility, CDs have attracted extensive attention in various research applications, such as cancer diagnosis, phototherapy, and optoelectronic...