Larvae of a new malaria mosquito species are abundantly present in water containers in cities in Ethiopia. The mosquito, Anopheles stephensi, is the main malaria mosquito in India but only appeared on the African continent a few years ago. It has now been found in cities and towns in urban settings in Ethiopia, Sudan, and Djibouti. Researchers from the Radboud university medical center and the Armauer Hansen Research Institute in Ethiopia showed that the invading mosquito species is highly susceptible to local malaria strains. Malaria can therefore become an increasing problem for urban areas in ...

Pioneering work led by a joint China-UK consortium has revealed the origin of one of the world's most important ecosystems, the East Asian biodiversity "hotspot," thus solving a longstanding riddle as to what prompted its formation and evolution. In a recent study published in Science Advances, a joint research team led by scientists from Xishuangbanna Tropical Botanical Garden (XTBG) of the Chinese Academy of Sciences, the University of Bristol (UK) and the Open University (UK) has revealed the first direct mechanism explaining how the growth of mountains in Northern Tibet drastically altered climate, vegetation and plant diversity in East Asia. The researchers used an innovative climate model that simulates ...

(Embargoed for January 28, 2021 3 a.m. SPT; January 27th 2 pm EST, 2021) -- Note: this study is scheduled for publication in the Journal Science Translational Medicine) A study presented today by Dr. Nobuyuki Takahashi of the Center for Cancer Research (CCR), National Cancer Institute (NCI), Bethesda, Md. at the IASLC World Conference on Lung Cancer Singapore demonstrates that small cell lung cancer (SCLC) may have an inherited predisposition and lays the foundation for understanding the interaction between genotype and tobacco exposure in exacerbating SCLC risk as well as potential therapeutic implications. Because tobacco is the dominant carcinogen, secondary causes of lung cancer are often diminished in perceived importance, especially in SCLC, the most lethal ...

A study has revealed for the first time the ancient origins of one of the world's most important ecosystems by unlocking the mechanism which determined the evolution of its mountains and how they shaped the weather there as well as its flora and fauna. It was previously thought Southern Tibet and the Himalaya were instrumental in turning the once barren land of eastern Asia into lush forests and abundant coastal regions which became home to a rich array of plant, animal and marine life, including some of the world's rarest species. But new findings, published today in the journal Science Advances, conversely show Northern Tibet played the more influential role in this transformation which began more than 50 million years ago. Scientists from a UK-China partnership, ...

By Elton Alisson  |  Agência FAPESP - Melatonin synthesized in the lungs acts as a barrier against SARS-CoV-2, preventing expression of genes that encode proteins in cells such as resident macrophages in the nose and pulmonary alveoli, and epithelial cells lining the alveoli, all of which are entry points for the virus. The hormone, therefore, prevents infection of these cells by the virus and inhibits the immune response so that the virus remains in the respiratory tract for a few days, eventually leaving to find another host. The discovery by researchers at the University ...

A study led by a University of Illinois Chicago researcher uses a new approach to measure precarious, or low-quality, employment in the United States. And, according to those findings, precarious employment has increased 9% between 1988 and 2016. Precarious employment, or P.E., is defined as low-quality employment, which is often characterized by low wages, job insecurity and irregular hours, making employment risky and stressful for the worker. In her study, "Changes in precarious employment in the United States: A longitudinal analysis," Vanessa Oddo, assistant professor in UIC's School of Applied Health Sciences, sought to create ...

People who are pregnant, breastfeeding or trying to conceive should be offered the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) vaccine based on ethical grounds, argue authors of a commentary in CMAJ (Canadian Medical Association Journal). They discuss how health care providers and patients can use a shared decision-making approach to weigh the risks and benefits to decide on the right action for the individual. "Core principles of medical ethics hold that medical decisions or interventions should respect individuals' autonomy, be just, be beneficial (beneficence), and not cause harm (nonmaleficence)," writes Dr. Jonathan Zipursky, Sunnybrook Health Sciences Centre and the University ...

Benoît Lessard and his team are developing carbon-based technologies which could lead to improved flexible phone displays, make robotic skin more sensitive and allow for wearable electronics that could monitor the physical health of athletes in real-time. With the help of the Canadian Light Source (CLS) at the University of Saskatchewan (USask), a team of Canadian and international scientists have evaluated how thin film structure correlates to organic thin-film transistors performance. Organic electronics use carbon-based molecules to create more flexible and efficient devices. The display of our smart phones is based on organic-LED technology, which uses organic molecules to emit bright light and others to respond to touch. Lessard, the corresponding author ...

HOUSTON - (Jan. 27, 2021) - Just a little soap helps clean up the challenging process of preparing two-dimensional hexagonal boron nitride (hBN). Rice University chemists have found a way to get the maximum amount of quality 2D hBN nanosheets from its natural bulk form by processing it with surfactant (aka soap) and water. The surfactant surrounds and stabilizes the microscopic flakes, preserving their properties. Experiments by the lab of Rice chemist Angel Martí identified the "sweet spot" for making stable dispersions of hBN, which can be processed into very thin antibacterial films that handle temperatures up to 900 degrees Celsius (1,652 degrees Fahrenheit). The work led by Martí, alumna Ashleigh Smith McWilliams and graduate student Cecilia Martínez-Jiménez ...

For the last century, seismic building codes and practices have primarily focused on saving lives by reducing the likelihood of significant damage or structural collapse. Recovery of critical functions provided by buildings and infrastructure have received less attention, however. As a result, many remain vulnerable to being knocked out of service by an earthquake for months, years or for good. A committee of experts, formed by the National Institute of Standards and Technology (NIST) and the Federal Emergency Management Agency (FEMA) under the direction of Congress, has urged officials at all levels of government to support research and policies that could help get the buildings and services society depends on up and running quickly after an earthquake. In a report delivered to ...

The rapid growth of e-cigarette use is a major public health problem in the United States - with significant attention on use among adolescents and young adults. Although manufacturers of e-cigarettes tout their products as safer alternatives to cigarette smoking, research has shown that e-cigarettes can be as hazardous as traditional tobacco products but appeal to those who were never cigarette smokers. In the first study to assess national use of e-cigarettes among adults with disabilities, George Mason University's College of Health and Human Services researchers found that adults with disabilities were twice as likely to use e-cigarettes (8.4%) than adults without ...

Despite all the advances in consumer technology over the past decades, one component has remained frustratingly stagnant: the optical lens. Unlike electronic devices, which have gotten smaller and more efficient over the years, the design and underlying physics of today's optical lenses haven't changed much in about 3,000 years. This challenge has caused a bottleneck in the development of next-generation optical systems such as wearable displays for virtual reality, which require compact, lightweight, and cost-effective components. At the Harvard John A. Paulson School of Engineering and Applied Sciences ...

In 2016, a team led by UCLA's Martin Monti reported that a 25-year-old man recovering from a coma had made remarkable progress following a treatment to jump-start his brain using ultrasound. Wired U.K. called the news one of the best things that happened in 2016. At the time, Monti acknowledged that although he was encouraged by the outcome, it was possible the scientists had gotten a little lucky. Now, Monti and colleagues report that two more patients with severe brain injuries -- both had been in what scientists call a long-term "minimally conscious state" -- have made impressive progress thanks to the same technique. The results are published ...

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 ...