LOS ALAMOS, N.M., January 27, 2021--A new 3D analysis shows that wildland fires flare up in forests populated by similar-sized trees or checkerboarded by large clearings and slow down where trees are more varied. The research can help fire managers better understand the physics and dynamics of fire to improve fire-behavior forecasts. "We knew fuel arrangement affected fire but we didn't know how," said Adam Atchley, lead author on a Los Alamos National Laboratory-led study published today in the International Journal of Wildland Fire. "Traditional models ...

Imagine a 7-year-old and a college student both take a break from their virtual classes to get a drink of water. When they return, the 7-year-old has difficulty restarting the assignment, while the college student resumes working as if the break never occurred. Nelson Cowan, an expert in working memory at the University of Missouri, believes understanding this developmental age difference can help younger children and their parents to better adjust to a virtual learning environment during the COVID-19 pandemic. "By understanding this developmental difference, then we can work to provide a little more structure for younger children in online settings, such as helping them organize their homework," said Cowan, ...

With the New Year, many people are making resolutions to eat healthier, by eating more vegetables, for example. But those who don't like the taste or texture of some vegetables might prefer to drink them in a home-squeezed juice. Now, researchers reporting in ACS Food Science & Technology have found that the choice of household juicing technique can influence the phytochemical content and antioxidant activity of common vegetable juices. Home juicing machines have become popular in recent years, with different types available. For example, blenders crush vegetables with fast, spinning blades, and the resulting juice is typically thick, with much pulp and dietary fiber. In contrast, high-speed centrifugal juicers quickly pulverize veggies and separate out pulp and ...

WASHINGTON, DC - Investigators leading the Lung Cancer Master Protocol, or Lung-MAP trial, will present findings from three translational medicine studies at the 2020 World Conference on Lung Cancer, to be held online January 28-31, 2021. The presentations will mark the first time that investigators share translational medicine insights from Lung-MAP, the first large-scale precision medicine trial in lung cancer backed by the National Cancer Institute (NCI), part of the National Institutes of Health, and the first major NCI trial to test multiple treatments, simultaneously, under one "umbrella" ...

Perovskites are projected to be a game-changer in future solar technology but currently suffer from a short operational lifespan and drops in efficiency when scaled up to a larger size Scientists have improved the stability and efficiency of solar cell modules by mixing the precursor materials with ammonium chloride during fabrication The perovskite active layer in the improved solar modules are thicker and have larger grains, with fewer defects Both 5 x 5 cm2 and 10 x 10 cm2 perovskite modules maintained high efficiencies for over 1000 hours Researchers from the Okinawa Institute of Science and Technology Graduate University (OIST) have created perovskite solar ...

Plastic is ubiquitous in people's lives. Yet, when plastic-containing items have fulfilled their missions, only a small amount is recycled into new products, which are often of lower quality compared to the original material. And, transforming this waste into high-value chemicals requires substantial energy. Now, researchers reporting in ACS' JACS Au have combined a ruthenium-carbon catalyst and mild, lower-energy reaction conditions to convert plastics used in bottles and other packaging into fuels and chemical feedstock. Global production of sturdy, single-use plastic for toys, sterile medical packaging, and food and beverage containers is increasing. Polyolefin polymers, such as polyethylene and ...

What makes cancer cells different from ordinary cells in our bodies? Can these differences be used to strike at them and paralyze their activity? Cancer researchers have been debating this question since the mid-19th century. A new study from Tel Aviv University (TAU) shows, for the first time, how an abnormal number of chromosomes (aneuploidy) -- a unique characteristic of cancer cells that researchers have known about for decades -- could become a weak point for these cells. The study could lead to the development of future drugs that will use this vulnerability to eliminate the cancer cells. The study was conducted in the laboratory of Dr. Uri Ben-David of TAU's Sackler Faculty of Medicine, in collaboration with six laboratories ...

Cells don't express all the genes they contain all the time. The portion of our genome that encodes eye color, for example, doesn't need to be turned on in liver cells. In plants, genes encoding the structure of a flower can be turned off in cells that will form a leaf. These unneeded genes are kept from becoming active by being stowed in dense chromatin, a tightly packed bundle of genetic material laced with proteins. In a new study in the journal Nature Communications, biologists from the University of Pennsylvania identify a protein that enables plant cells to reach these otherwise inaccessible genes in order to switch between different identities. Called ...

Irvine, Calif., Jan. 27, 2021 -- One of President Joe Biden's first post-inauguration acts was to realign the United States with the Paris climate accord, but a new study led by researchers at the University of California, Irvine demonstrates that rising emissions from human land-use will jeopardize the agreement's goals without substantial changes in agricultural practices. In a paper published today in Nature, the team presented the most thorough inventory yet of land-use contributions to carbon dioxide and other greenhouse gases (including nitrous oxide and methane) from 1961 to 2017, taking into account emissions from agricultural production activities and modifications to the natural landscape. "We estimated and attributed global land-use emissions among 229 countries ...

Gardeners and farmers around the country recognize that crop varieties grow best in certain regions. Most plant species have adapted to their local environments; for example, crop and ornamental seeds sold for the upper Midwest are often very different than those bred for Texas. Identifying and breeding varieties that have high productivity across a range of environments is becoming increasingly important for food, fuel and other applications, and breeders aren't interested in waiting decades to develop new crops. One example is an ongoing collaborative effort to improve the emerging bioenergy crop ...

The development of cost-efficient, portable microscopy units would greatly expand their use in remote field locations and in places with fewer resources, potentially leading to easier on-site analysis of contaminants such as E. coli in water sources as well as other practical applications. Current microscopy systems, like those used to image micro-organisms, are expensive because they are optimized for maximum resolution and minimal deformation of the images the systems produce. But some situations do not require such optimization--for instance, simply detecting the presence of pathogens in water. One potential approach to developing a low-cost portable microscopy system is to use transparent microspheres in combination with affordable ...

In September, a team led by astronomers in the United Kingdom announced that they had detected the chemical phosphine in the thick clouds of Venus. The team's reported detection, based on observations by two Earth-based radio telescopes, surprised many Venus experts. Earth's atmosphere contains small amounts of phosphine, which may be produced by life. Phosphine on Venus generated buzz that the planet, often succinctly touted as a "hellscape," could somehow harbor life within its acidic clouds. Since that initial claim, other science teams have cast doubt on the reliability of the phosphine ...

Car accidents are responsible for approximately a million deaths each year globally. Among the many causes, driving at night, when vision is most limited, leads to accidents with higher mortality rates than accidents during the day. Therefore, improving visibility during night driving is critical for reducing the number of fatal car accidents. An adaptive driving beam (ADB) can help to some extent. This advanced drive-assist technology for vehicle headlights can automatically adjust the driver's visibility based on the car speed and traffic environment. ADB systems that ...

A combination of observational data and sophisticated computer simulations have yielded advances in a field of astrophysics that has languished for half a century. The Dark Energy Survey, which is hosted by the U.S. Department of Energy's Fermi National Accelerator Laboratory, has published a burst of new results on what's called intracluster light, or ICL, a faint type of light found inside galaxy clusters. The first burst of new, precision ICL measurements appeared in a paper published in The Astrophysical Journal in April 2019. Another appeared more recently in Monthly Notices of the Royal Astronomical Society. In a surprise finding of the latter, DES physicists discovered new evidence that ICL might provide a new way to measure a mysterious substance called ...

As surgeons balance the need to control their patients' post-surgery pain with the risk that a routine operation could become the gateway to long-term opioid use or addiction, a new study shows the power of an approach that takes a middle way. In a new letter in JAMA Surgery, a team from Michigan Medicine at the University of Michigan reports on findings from a study of 620 patients who had surgery in hospitals across Michigan, had their painkiller use tracked, and took surveys within one to three months after their operations. Half of the patients received pre-surgery counseling that emphasized non-opioid pain treatment as their first option. Some patients in this group received small, "just in case" prescriptions, but a third of them didn't receive any opioid prescription ...

LA JOLLA--A new study led by scientists at La Jolla Institute for Immunology (LJI) suggests that T cells try to fight SARS-CoV-2 by targeting a broad range of sites on the virus--beyond the key sites on the virus's spike protein. By attacking the virus from many angles, the body has the tools to potentially recognize different SARS-CoV-2 variants. The new research, published January 27, 2021 in Cell Report Medicine, is the most detailed analysis so far of which proteins on SARS-CoV-2 stimulate the strongest responses from the immune system's "helper" CD4+ T cells and "killer" CD8+ T cells. "We ...

INDIANAPOLIS--Researchers at the Indiana University Melvin and Bren Simon Comprehensive Cancer Center have identified how breast cancer cells hide from immune cells to stay alive. The discovery could lead to better immunotherapy treatment for patients. Xinna Zhang, PhD, and colleagues found that when breast cancer cells have an increased level of a protein called MAL2 on the cell surface, the cancer cells can evade immune attacks and continue to grow. The findings are published this month in The Journal of Clinical Investigation and featured on the journal's cover. The lead author of the study, Zhang is a member of the ...

Members of Syracuse University's College of Arts and Sciences are shining new light on an enduring mystery--one that is millions of years in the making. A team of paleontologists led by Professor Cathryn Newton has increased scientists' understanding of whether Devonian marine faunas, whose fossils are lodged in a unit of bedrock in Central New York known as the Hamilton Group, were stable for millions of years before succumbing to waves of extinctions. Drawing on 15 years of quantitative analysis with fellow professor Jim Brower (who died in 2018), Newton has continued to probe the structure of these ancient fossil communities, among the most renowned on Earth. The group's findings, reported by the Geological Society of America (GSA), provide critical ...

Irvine, CA - January 27, 2021 - A new University of California, Irvine-led study finds a new method for identifying biomarkers may aid in early cancer diagnosis. The study focused on lung cancer, however the Cell Heterogeneity-Adjusted cLonal Methylation (CHALM) method has been tested on aging and Alzheimer's diseases as well and is expected to be effective for studying other diseases. "We found the CHALM method may be a valuable tool in helping researchers to identify more reliable differentially methylated genes from sequence-based methylation data," ...

Doctors are increasingly using genetic signatures to diagnose diseases and determine the best course of care, but using DNA sequencing and other techniques to detect genomic rearrangements remains costly or limited in capabilities. However, an innovative breakthrough developed by researchers at Virginia Commonwealth University Massey Cancer Center and the VCU Department of Physics promises to diagnose DNA rearrangement mutations at a fraction of the cost with improved accuracy. Led by VCU physicist Jason Reed, Ph.D., the team developed a technique that combines a process called digital polymerase chain reaction (dPCR) with high-speed atomic force microscopy (HSAFM) to create an image with such nanoscale resolution that users can measure differences in ...

Historically redlined neighborhoods are more likely to have a paucity of greenspace today compared to other neighborhoods. The study by researchers at Columbia University Mailman School of Public Health and the University of California, Berkeley and San Francisco, demonstrates the lasting effects of redlining, a racist mortgage appraisal practice of the 1930s that established and exacerbated racial residential segregation in the United States. Results appear in Environmental Health Perspectives. In the 1930s, the Home Owners' Loan Corporation (HOLC) assigned risk grades to neighborhoods across the country based on racial demographics and other factors. "Hazardous" areas--often those whose residents included people ...

LAWRENCE -- For at least a century, ecologists have wondered at the tendency for populations of different species to cycle up and down in steady, rhythmic patterns. "These cycles can be really exaggerated -- really huge booms and huge busts -- and quite regular," said Daniel Reuman, professor of ecology & evolutionary biology at the University of Kansas and senior scientist at the Kansas Biological Survey. "It attracted people's attention because it was kind of mysterious. Why would such a big thing be happening?" A second observation in animal populations ...

(Boston)--Researchers from Boston University School of Medicine (BUSM) have identified proteins that are essential for the viability of whole genome doubled tumor cells, yet non-essential to normal cells that comprise the majority of human tissue. "Exploiting these vulnerabilities represents a highly significant and currently untapped opportunity for therapeutic intervention, particularly because whole genome doubling is a distinguishing characteristic of many tumor types," said corresponding author Neil J. Ganem, PhD, associate professor of pharmacology and medicine, section of hematology and medical oncology, at Boston University School of Medicine (BUSM). The vast majority of human cells are diploid, meaning that they possess two copies of each ...

The Asia Pacific Consortium on Osteoporosis (APCO) has today launched the first pan-Asia Pacific clinical practice standards for the screening, diagnosis, and management of osteoporosis, targeting a broad range of high-risk groups. Published in Osteoporosis International today, 'The APCO Framework' comprises 16 minimum clinical standards set to serve as a benchmark for the provision of optimal osteoporosis care in the region. Developed by APCO members representing key osteoporosis stakeholders, and multiple medical and surgical specialities, this set of clear, concise, relevant and pragmatic clinical standards aims to support national societies, guidelines development authorities, and health care policy makers with ...

People who take opioid medications for chronic pain may have a hard time finding a new primary care clinic that will take them on as a patient if they need one, according to a new "secret shopper" study of hundreds of clinics in states across the country. Stigma against long-term users of prescription opioids, likely related to the prospect of taking on a patient who might have an opioid use disorder or addiction, appears to play a role, the University of Michigan research suggests. Simulated patients who said their doctor or other primary care provider had retired were more likely to be told they could be accepted as new patients, compared with those who said their provider had stopped prescribing opioids to them for an unknown reason. The U-M primary care provider ...