Culture
WASHINGTON, December 22, 2020 -- Over 300,000 people die each year in the U.S. due to sudden cardiac death. In many cases, sudden cardiac death is caused by abnormally rapid heart rhythms called tachycardias, which means the heart cannot pump adequate blood to the body.
In Chaos, by AIP Publishing, researchers use mice to study tachycardias and find there are intrinsic mechanisms that exist in heart tissue that they hypothesize lead to the self-termination of rapid cardiac rhythm.
In many animals, female preference for males with the most elaborate appearance is an important factor in the evolution of bright and dramatic colours.
Females are thought to prefer colourful males because only 'high-quality' males - those with the most resources, superior foraging skills or social status - can produce and maintain the most vibrant colours.
By choosing these high-quality males, females may ensure a good father or good genes for their offspring.
But do high quality males that are preferred by females invest more in their appearance?
What The Study Did: Researchers used data from a large national health insurer in the U.S. to examine whether hospital outcomes for patients with COVID-19 are improving.
Authors: David A. Asch, M.D., of the University of Pennsylvania in Philadelphia, 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/jamainternmed.2020.8193)
Female rats that inhaled vaporized cannabis daily for a month developed a blunted physiological response to stress, according to a new study by Washington State University researchers.
In contrast, male rats that were provided access to the same potency of cannabis over the same 30-day window did not experience any physiological changes in how they responded to a stressful situation.
The results of the study, published in the journal Neurobiology of Stress, indicate there may be significant differences in how chronic cannabis use affects males and females.
Abstract: Atomic force microscopy (AFM) allows to obtain images and movies showing proteins at work, however with limited resolution. The developed BioAFMviewer software opens the opportunity to use the enormous amount of available high-resolution protein data to better understand experiments. Within an interactive interface with rich functionality, the BioAFMviewer computationally emulates tip-scanning of any biomolecular structure to generate simulated AFM graphics and movies. They greatly help in the interpretation of e.g., high-speed AFM observations.
(LOS ANGELES) - There are many different events which may lead to excessive and uncontrolled bleeding within the body. This can occur as a result of inflammation and ulcerations, abnormalities in the blood vessels or trauma-related injuries. Individuals with predisposing conditions, such as cardiac patients, are at particular risk of internal bleeding due to the anticoagulants they are often prescribed as a preventive measure. They are also prone to gastrointestinal bleeds, affecting 40% of patients who are on cardiac assistance devices.
Despite significant advances in wireless technology, the manufacturing industry continues to turn to wired forms of communication such as Ethernet or fibre optics for its most critical tasks. A new study by Cristina Cano and the full professor Xavier Vilajosana, researchers from the Wireless Networks (WiNe) group at the Internet Interdisciplinary Institute (IN3), opens the door to the use of wireless technologies with power and reliability that are comparable to fibre optics and that could replace cabled connections.
Existence of the receptor was now proven experimentally by the team headed by Professor Christopher Grefen from the Chair of Molecular and Cellular Botany at Ruhr-Universität Bochum (RUB). The researchers published their report on the 5. January 2021 in the journal Proceedings of the National Academy of Sciences PNAS.
GET pathway for specific proteins
A team of scientists from Siberian Federal University together with their colleagues from Novosibirsk studied the effect of nanoparticles on oil production efficiency. When added to the water that displaces oil from a reservoir, nanoparticles improve the separation of oil drops from mine rock and their washing to the surface. The work received a grant from the Russian Science Foundation, and an article about it was published in the Journal of Molecular Liquids.
Despite COVID-19 restrictions and the risk of animal to human disease transmission, illegal wildlife trade on social media networks has continued, with wild animals sometimes sold as 'lockdown pets'. Researchers from Oxford Brookes University and the University of Western Australia, having analysed around 20,000 Facebook posts about wild pet trade, are urging increased governance on social media sites in order to curb potential extinctions and reduce the risk of pandemics.
To reach the Mariana Islands in the Western Pacific, humans crossed more than 2,000 kilometres of open ocean, and around 2,000 years earlier than any other sea travel over an equally long distance. They settled in the Marianas around 3,500 years ago, slightly earlier than the initial settlement of Polynesia.
Scientists from Nanyang Technological University, Singapore (NTU Singapore), have developed a new way to cure adhesives using a magnetic field.
Conventional adhesives like epoxy which are used to bond plastic, ceramics and wood are typically designed to cure using moisture, heat or light. They often require specific curing temperatures, ranging from room temperature up to 80 degrees Celsius.
The curing process is necessary to cross-link and bond the glue with the two secured surfaces as the glue crystallises and hardens to achieve its final strength.
Earth's forests are indispensable for both humans and wildlife: they absorb CO2, provide food for large parts of the world's population and are home to all sorts of animals.
However, forest conservation measures are lagging in many countries, says Laura Vang Rasmussen, an assistant professor at the University of Copenhagen's Department of Geosciences and Nature Management.
The supersharp radio "vision" of the National Science Foundation's Very Long Baseline Array (VLBA) has revealed previously unseen details in a jet of material ejected at three-quarters the speed of light from the core of a galaxy some 12.8 billion light-years from Earth. The galaxy, dubbed PSO J0309+27, is a blazar, with its jet pointed toward Earth, and is the brightest radio-emitting blazar yet seen at such a distance. It also is the second-brightest X-ray emitting blazar at such a distance.
Many animal species use social information - from conspecifics or other species - to inform their behavioral choices, for example where to look for food or build a nest. In a recent study, ornithologists have shown for the first time that the ability to use such information can depend on an individual's cognitive skills. In the collared flycatcher, females that mastered a learning task faster were more likely to copy the nest site choices of great and blue tits in the same area.