Tech
The discovery of new topological states of matter has become a vital goal in fundamental physics and material science. A three-dimensional (3D) Dirac semimetal (DSM), accommodating many exotic transport properties such as anomalous magnetoresistance and ultrahigh mobility, is an exceptional platform for exploring topological phase transitions and other novel topological quantum states. It is also of fundamental interest to serve as a solid-state realization of a (3+1)-dimensional Dirac vacuum.
In a new paper published in Light Science & Application, researchers from Tsinghua University and Arizona State University report their results on studying the fundamental physics of excitons, trions, and related complexes. Excitons are quasi-particles formed by an electron and a void called hole left when an electron is excited in a semiconductor. Such an exciton can be charged, to form a so called trion when it further binds with another electron or a hole.
Though biodiversity is in crisis globally, amphibians in particular face a variety of threats. One such threat comes from pathogens like the amphibian chytrid fungus Batrachochytrium dendrobatidis (Bd). This fungus causes chytridiomycosis, a disease that research indicates contributes to the decline of some amphibians. New research, however, now calls into question some prior evidence that links the widespread pathogen to hundreds of amphibian declines.
In a new publication from Cardiovascular Innovations and Applications; DOI https://doi.org/10.15212/CVIA.2019.0570, Fabian Guenther, Andreas Seitz, Valeria Martínez Pereyra, Raffi Bekeredjian, Udo Sechtem and Peter Ong from the Department of Cardiology, Robert-Bosch-Krankenhaus, Stuttgart, Germany consider whether coronary microvascular spasm exists.
Oncotarget Volume 11, Issue 11 reported that in this preclinical study, we characterized the binding affinity and selectivity of quizartinib, a small-molecule inhibitor of FLT3, and AC886, the active metabolite of quizartinib, compared with those of other FLT3 inhibitors.
Livestock production and nitrogen fertilizer used in croplands emit lots of ammonia, which is the most abundant alkaline gas in ambient air. In recent years, Chinese scientists have suggested reducing ammonia emissions as an effective measure to alleviate aerosol pollution because ammonia can react with acidic gases to form aerosols and pollution.
Previously, KFU scientists were able to develop the first inhibitors based on castor oil and chitosan. Researchers came up with the idea to create them to solve at least two tasks: ensure efficient production and transportation of hydrocarbons, as well as reduce environmental risks. Now a series of inhibitors has appeared with new reagents based on water-soluble polyurethanes.
In their study, by investigating the vibrations of the molecules in the thin films, the scientists were able to show that very fundamental quantum effects, so-called zero point vibrations, can make a significant contribution to voltage losses. The study has now been published in the journal Nature Communications.
A team of DESY scientists has built a miniature double particle accelerator that can recycle some of the laser energy fed into the system to boost the energy of the accelerated electrons a second time. The device uses narrowband terahertz radiation which lies between infrared and radio frequencies in the electromagnetic spectrum, and a single accelerating tube is just 1.5 centimetres long and 0.79 millimetres in diameter.
A previously unknown significant source of carbon just discovered in the Arctic has scientists marveling at a once overlooked contributor to local coastal ecosystems - and concerned about what it may mean in an era of climate change.
Electrical and chemical signals flash through our brains constantly as we move through the world, but it would take a high-speed camera and a window into the brain to capture their fleeting paths.
University of California, Berkeley, investigators have now built such a camera: a microscope that can image the brain of an alert mouse 1,000 times a second, recording for the first time the passage of millisecond electrical pulses through neurons.
WASHINGTON -- Researchers have designed a new chip-based device that can shape and steer blue light with no moving parts. The device could greatly reduce the size of light projection components used for augmented reality and a variety of other applications.
The public's confusion around what constitutes a healthy diet is related in part to nutrition studies that do not standardize the foods consumed by research participants or participants' adherence to their diet programs, argues Kevin Hall in this Perspective. According to Hall, domiciled feeding studies - which involve subjects being housed and fed in comfortable yet controlled facilities - could greatly improve the understanding of dietary influences on health.
After an explosive device on the Hayabusa2 spacecraft fired a copper cannonball a bit larger than a tennis ball into the near-Earth asteroid Ryugu, creating an artificial impact crater on it, researchers understand more about the asteroid's age and composition, they say. The results may inform efforts to make surface age estimations of other rubble-pile asteroids. When Hayabusa2 launched an orbital bombardment upon the tiny world of Ryugu - a rocky, nearby asteroid orbiting between Earth and Mars - it was to expose the pristine subsurface material for remote sensing and sampling.
PHILADELPHIA (March 18, 2020) - It's long been understood that care that respects and integrates the wants, needs, and preferences of patients results in higher ratings of satisfaction and improved health outcomes. Yet, several barriers still often impede the delivery of patient-centered care. A new study from the University of Pennsylvania School of Nursing (Penn Nursing) shows that organizational supports for nurse practitioners (NPs) can enhance their ability to deliver patient-centered care.