Earth
Volunteer firefighters -- who comprise more than 65 percent of the U.S. fire service -- have higher levels of "forever chemicals," per- and polyfluoroalkyl substances (PFAS), in their bodies than the general public, according to a Rutgers study.
The study, which was published in the International Journal of Environmental Research and Public Health, compared the levels of nine PFAS chemicals in the blood of volunteer firefighters against levels in the general population.
What The Study Did: The association of the COVID-19 pandemic with general surgical residents' operative experience by postgraduate year and case type is examined in this study.
Authors: Farin Amersi, M.D., of Cedars-Sinai Medical Center in Los Angeles, is the corresponding author.
To access the embargoed study: Visit our For The Media website at this link https://media.jamanetwork.com/
(doi:10.1001/jamasurg.2021.1978)
WASHINGTON, D.C, (April 30, 2021) - An analysis of a new international registry reveals benefits of using a longer covered stent for interventional procedures in congenital heart disease patients with Sinus Venosus Atrial Septal Defect (SVASD). The study was presented today as late-breaking clinical research at the Society for Cardiovascular Angiography & Interventions (SCAI) 2021 Scientific Sessions.
The provenance of oxygen on Earth and other solar planetary bodies is a fundamental issue. It is widely accepted that the prebiotic pathway of oxygen production in the Earth primitive atmosphere was via vacuum ultraviolet (VUV) photodissociation of CO2 and subsequent recombination of two O atoms.
In contrast, the photodissociation of H2O, one of the dominant oxygen carriers, has long been assumed to proceed mainly to produce hydroxyl (OH)- and hydrogen (H)-atom primary products, and its contribution to oxygen production is limited.
The Brazilian Amazon rainforest released more carbon than it stored over the last decade - with degradation a bigger cause than deforestation - according to new research.
More than 60% of the Amazon rainforest is in Brazil, and the new study used satellite monitoring to measure carbon storage from 2010-2019.
The study found that degradation (parts of the forest being damaged but not destroyed) accounted for three times more carbon loss than deforestation.
Glaciers are a sensitive indicator of climate change - and one that can be easily observed. Regardless of altitude or latitude, glaciers have been melting at a high rate since the mid-?20th century. Until now, however, the full extent of ice loss has only been partially measured and understood. Now an international research team led by ETH Zurich and the University of Toulouse has authored a comprehensive study on global glacier retreat, which was published online in Nature on 28 April.
Spreading of the seafloor in the Red Sea basin is found to have begun along its entire length around 13 million years ago, making its underlying oceanic crust twice as old as previously believed.
The formation history and age of the Red Sea basin has long been contested, largely because the crust under the sea is widely overlain by thick layers of salt and sediment, making it difficult to observe directly.
During the first wave of the corona pandemic, 36 per cent fewer men were diagnosed with prostate cancer in Sweden than in previous years. On the other hand, the number of patients receiving curative treatment for prostate cancer was unaffected. This is shown by a new register study led by Uppsala University researchers, whose results are published in the Scandinavian Journal of Urology.
Microalgae of the dinoflagellate group are known for their ability to survive in other animal cells. These tiny single-cell organisms have engaged in mutually beneficial relationships with corals since primeval times. By passing on critical nutrients to their hosts, dinoflagellates allow corals to thrive even in barren areas.
Archeologists have learned a lot about our ancestors by rummaging through their garbage piles, which contain evidence of their diet and population levels as the local flora and fauna changed over time.
One common kitchen scrap in Africa -- shells of ostrich eggs -- is now helping unscramble the mystery of when these changes took place, providing a timeline for some of the earliest Homo sapiens who settled down to utilize marine food resources along the South African coast more than 100,000 years ago.
In August 2016 a massive storm on par with a Category 2 hurricane churned in the Arctic Ocean. The cyclone led to the third-lowest sea ice extent ever recorded. But what made the Great Arctic Cyclone of 2016 particularly appealing to scientists was the proximity of the Korean icebreaker Araon.
Tomorrow's cutting-edge technology will need electronics that can tolerate extreme conditions. That's why a group of researchers led by Michigan State University's Jason Nicholas is building stronger circuits today.
Nicholas and his team have developed more heat resilient silver circuitry with an assist from nickel. The team described the work, which was funded by the U.S. Department of Energy Solid Oxide Fuel Cell Program, on April 15 in the journal Scripta Materialia.
The brain possesses a complex architecture of functional networks as its information-processing machinery. Is the brain’s network architecture itself a target of disease? If so, which networks are associated with which diseases? What can this tell us about the underlying causes of brain disorders?
Adult mantis shrimp pack an explosive punch that can split water, but no crustacean emerges fully formed. Minute larvae can undergo six or seven transformations before emerging as fully developed adults and limbs and manoeuvres develop over time. So, when do mantis shrimp larvae acquire the ability to pulverise their dinner and how powerful are the punches that these mini crustaceans pack?
The subseafloor constitutes one of the largest and most understudied ecosystems on Earth. While it is known that life survives deep down in the fluids, rocks, and sediments that make up the seafloor, scientists know very little about the conditions and energy needed to sustain that life.