Search Posts

Nyheder2021november29

Tegn abonnement på BioNyt!

Vil du hjælpe med at udpege vigtigste nyheder? DO YOU WANT TO HELP CHOOSE THE MOST IMPORTANT SCIENCE NEWS? Email: bionyt@gmail.com Phone-sms: (45)21729908

'Missing link' ends debate about how ancient human relative got around
New lower back fossils are the "missing link" that settles a decades old debate proving early hominins used their upper limbs to climb like apes and their lower limbs to walk like humans. The recovery of new lumbar vertebrae from the lower back of a single individual of the human relative, Australopithecus sediba , and portions of other vertebrae of the same female from Malapa, South Africa, toge
3d
Mobile molecular robots swim in water
Creating molecular microrobots that mimic the abilities of living organisms is a dream of nanotechnology, as illustrated by the renowned physicist Richard Feynman. There are a number of challenges in achieving this goal. One of the most significant of these is the creation of directed self-propulsion in water.
3d
Mechanism for insensitivity to important antimalarial drug in new pathogen variant discovered
Malaria is one of the most dangerous infectious diseases. The causative pathogens are microorganisms of the genus Plasmodium. A particularly dangerous form of the disease is caused by Plasmodium falciparum. Artemisinin is one of the most important antimalarial drugs against this parasite. However, in a mutant of the pathogen that is now spreading, the effect of artemisinin is limited. A team of re
3d
School COVID-19 policies are a real mixed bag
An analysis of all 50 states' school COVID-19 policies finds widespread discordance and variation. The look at policies about masking in schools, requiring COVID-19 vaccines for eligible students and teachers, and providing COVID-19 services in the school setting, finds variation among states but also within states, as individual districts adopt policies at odds with their own governors' guidelin
3d
Nondestructive testing of optical fiber diameters
The increased use of optical fiber has seen a greater focus on the precise control and measurement of its diameter. That is due to the diameter being vital for a wide range of fields, from high-speed optical communication to ultra-high sensitivity sensing. Handling optical fiber before measurement can damage the fiber permanently, particularly when multiple-point measurements are needed.
3d
We reconstructed birdsong soundscapes from over 200,000 places, and they're getting quieter
Imagine going to hear your favorite orchestral piece played in a world-class venue—and only the woodwind and brass sections turning up. Whether we're aware of it or not, this sparse soundscape is similar to what we're often experiencing when we head out to our favorite parks or nature reserves. The sounds produced by the natural world are changing, which means that the benefits we gain from being
3d
Examining how the superbug Pseudomonas aeruginosa reacts to antibiotics
Researchers at Ruhr-Universität Bochum (RUB) have studied how different drugs affect the difficult-to-treat bacterium Pseudomonas aeruginosa. According to the World Health Organisation, new treatment options for the pathogen are urgently required, as some strains are already resistant to all currently approved antibiotics. The Bochum-based team headed by Professor Julia Bandow exposed P. aeruginos
3d
Guiding Tianwen-1 to China's first successful Mars rover landing
Mars landing missions only succeed about half the time, a rate largely determined by the entry, descent and landing (EDL) phase, according to the researchers who designed Tianwen-1's control systems. They published their guidance, navigation and control approach for Tianwen-1 on October 16 in Space: Science & Technology.
3d
Millions of Americans struggle to pay their water bills: How a national water aid program could work
Running water and indoor plumbing are so central to modern life that most Americans take them from granted. But these services aren't free, and millions struggle to afford them. A 2019 survey found that U.S. households in the bottom fifth of the economy spent 12.4% of their disposable income on water and sewer services. News reports suggest that for low-income households, this burden has increased
3d
Breakdown of 3D protein structures: Threaded as an eyelet
It's an old needlework trick, and a protein in our body knows it: Instead of threading yarn into the eye from the end, it can be easier to pass a loop through it. This is how a protein in our body works, unfolding or separating other protein structures. Biologists from the University of Duisburg-Essen (UDE) have made this discovery and published it in Nature Structural & Molecular Biology.
3d
Study details baseline needs to bring factories into compliance with labor standards
Researchers from North Carolina State University have conducted an in-depth study to establish all of the actions apparel factories will need to take in order to come into compliance with international labor standards. The study is a first step toward determining what such compliance would cost consumers, and building support for making the needed changes.
3d
Galileo satellites given green light for launch
Europe's next pair of Galileo satellites have been given a green light for launch. Last Friday's Launch Readiness Review confirmed that the satellites, the supporting ground installations, and the early operations facilities and teams are ready for lift-off on the early hours of Thursday morning, European time.
3d
Sentinel-6 returning most precise data ever on sea level
Sea-level rise is one of the most immediate consequences of climate change, as highlighted recently through urgent pleas from leaders of island nations at the COP26 summit. Global measures of sea-level rise are imperative to underpinning global policy and for strategies to protect coastlines and low-lying lands. Measuring tiny differences in the height of the sea surface from space is no easy task
3d
Cells' replication of DNA is more 'error-prone' in microgravity
On 22 May 2019, scientists from Queen's University boarded a modified Falcon 20 aircraft at Ottawa airport. Scheduled was a 'vomit comet' flight, where the plane repeatedly climbs to 8km in a steep parabola, alternating with a descent in freefall. During freefall, at a rate of over 3.3km in 20 seconds, only gravity but no lift, thrust, or drag work on the plane, resulting in weightlessness. The sc
3d
Scientists capture electron transfer image in electrocatalysis process
The involvement between electron transfer (ET) and catalytic reaction at electrocatalyst surface makes electrochemical process challenging to understand and control. How to experimentally determine ET process occurring at nanoscale is important to understand the overall electrochemical reaction process at active sites.
3d
Drop in students who come to the US to study could affect higher education and jobs
Driven largely by the global pandemic, the number of international students enrolled at U.S. colleges and universities fell by 15%—or 161,401 students—from 2019 to 2020. However, early data for 2021 indicate the number might bounce back soon. This is according to new data from the Institute of International Education and the U.S. State Department.
3d
White neighborhoods have higher carbon emissions
More carbon emissions come from homes in white neighborhoods than those in African American ones, research finds. Residential energy use represents roughly one-fifth of annual greenhouse gas emissions in the United States. A team of researchers used data from 60 million individual United States households to look into how carbon emissions resulting from household energy use vary by race and ethni
3d
South African groundwater project shows the power of citizen science
About 30% of the water on the planet is under the ground, out of sight and not easily accessed. Little is known about this "invisible" groundwater. This is especially so in remote areas, such as the part of South Africa's Limpopo province where a research project called Diamonds on the Soles of their Feet is taking place.
3d
Gabe and Bam Bam Fix the Road and Build a Culvert | Alaskan Bush People
Stream Full Episodes of Alaskan Bush People: https://www.discoveryplus.com/show/alaskan-bush-people #Discovery #AlaskanBushPeople #OffGrid Subscribe to Discovery: http://bit.ly/SubscribeDiscovery Follow Us on TikTok: https://www.tiktok.com/@Discovery We're on Instagram! https://instagram.com/Discovery Join Us on Facebook: https://www.facebook.com/Discovery Follow Us on Twitter: https://twitter.co
3d
El Salvador Wants to Build a Volcano-Powered Crypto City
Cashout (Photo: Harrison Kugler/Unsplash) The world's first "crypto city" is coming to El Salvador, and its cryptocurrency focus isn't even the only thing that makes it exciting. With a good dose of fanfare, El Savador President Nayib Bukele announced this month that beginning in 2022, the country would be building a "bitcoin city" at the base of Conchagua, an oceanside volcano. The city will be
3d
NASA Launches DART Asteroid Deflection Mission
Earth has been pelted by space rocks on a regular basis for the entirety of its existence, and there's nothing stopping it from happening again. The next big Earth impactor is already out there, and eventually, it'll make itself known. For the first time, there's a chance we could stop such an object from clobbering the planet. NASA just launched the DART spacecraft early Wednesday morning (Nov 2
3d
Giving shoppers a nudge to forgo plastic bags
The opportunity to make a small charitable donation on a store owner's nickel may be just the encouragement shoppers need to forgo toting their goods home in a single-use plastic bag, new research suggests.
3d
Researchers team up to get a clearer picture of molten salts
Researchers at the Department of Energy's Oak Ridge, Brookhaven and Idaho national laboratories and Stony Brook University have developed a novel approach to gain fundamental insights into molten salts, a heat transfer medium important to advanced energy technologies.
3d
Improving coseismic slip measurements
Geologists describe the process of an earthquake as occurring in three distinct phases. During the interseismic phase, strain builds up along a fault as adjacent pieces of crust catch onto one another and move in opposite directions. This strain eventually reaches a breaking point, initiating the coseismic phase, in which the crust gives way and "snaps" to a new position. This snap is what we expe
3d
Släktingar får inget veta om ärftlig cancerrisk
Släktingar förväntar sig att få veta om en ärftlig risk för cancer upptäcks. Och vet inte att hela ansvaret för att informera ligger på den cancerdrabbade. Något som fått deltagarna i en studie från Umeå universitet att reagera med bestörtning. – Studierna visar på något av en felande länk i informationskedjan kring ärftlig cancerrisk. Deltagarna upplevde sig ha rätt till sådan information om det
3d
Real-Life Spies Struggle to Adapt to Smartphone Surveillance
I Spy The CIA and other spy agencies are apparently struggling to keep its undercover agents, well, undercover. Adapting to a world covered in smartphones, surveillance cameras and online tracking has been a challenge for the intelligence agency, according to the Wall Street Journal . The publication listed a litany of times intelligence officers have been thwarted, like a time in 2010 that Israe
3d
Offentliga verksamheter brister i sin dokumenthantering
En studie av arkiverade doktorsavhandlingar visar att bara 0,1 procent var sparade på ett långsiktigt säkert sätt. Information riskerar att gå förlorad i framtiden för att man använder fel digitala format. I samband med långsiktig arkivering av digitala textdokument behövs standardiserade format som är utformade för lång livslängd. Ett sådant exempel är formatet pdf/a-1b. Men det är krångligt att
3d
Nanofabrication using thermomechanical nanomolding
Advances in nanotechnology require the development of nanofabrication methods for a variety of available materials, elements, and parameters. Existing methods do not possess specific characteristics and general methods of versatile nanofabrication remain elusive. In a new report now published in Science Advances, Naijia Liu and a team of scientists in mechanical engineering and materials science a
3d
Four reasons why physically punishing school children doesn't work
When I was a child I went to school in South Africa. This was the late 1970s. At school, the teachers would hit us. It was called getting the cane, the cane being a long, flexible stick. This tradition, exported from a Dickensian Victorian English model, was very popular with some teachers. They were seen as terrors: you didn't want to get the cane from them. There was one teacher in particular wh
3d
Inactive proteases important for plant development
Climate change with its extreme temperatures and fluctuating precipitations is affecting agricultural land conditions and crop yields. Therefore it is essential to understand and improve the details of plant growth. Laxmi Mishra has developed new knowledge about a family of chloroplast proteases called FtsH. She is defending her dissertation at Umeå University.
3d
Scientist says time is running out for West Antarctic ice sheet
For more than 30 years, David Harwood, professor in the Department of Earth and Atmospheric Sciences at the University of Nebraska-Lincoln, has been a leading scientist investigating how global temperature change affected Antarctic ecosystems and the stability of the large southern ice sheets over millions of years in the ancient past. He and other Nebraska scientists, engineers, drillers and stud
3d
Ozone causes skin to emit tiny airborne particles
Air pollution is responsible for 7 million premature deaths around the world every year, according to the World Health Organization. That's roughly the same number of people who die from smoking or malnutrition. The damaging effects of air pollution are caused mainly by the small airborne particles produced from traffic and coal-fired plants or through chemical reactions with compounds in the atmo
3d
Trädsort avgörande för småkrypen i stan
Det krävs insekter för att en stad ska fungera. Nu visar forskning att valet av trädsorter har större betydelse för det urbana insektslivet än man någonsin trott. Vilken sorts träd man planterar – om man väljer arter som är inhemska eller icke-inhemska – har stor betydelse för insektslivet i en stad, visar en studie där forskare undersökt Malmös parker. Träd är av avgörande betydelse för småkryp,
3d
Discrimination still plagues science
Nature, Published online: 29 November 2021; doi:10.1038/d41586-021-03043-y Employers need to do more to improve workplace diversity, equity and inclusion, a Nature survey finds.
3d
Get Ready for Omicron
Experts knew, and had been warning, that delta was not going to be the last Greek letter to sweep across the world. The World Health Organization (WHO) tracks variants of the SARS-CoV-2 virus which causes COVID-19. They track variants of interest (VOI) which have been identified as potentially problematic, and variants of concern (VOC) which have been demonstrated to have either increased infecti
3d
Cyber Monday Deal: Get 70% Off A Course Bundle That Offers A Lifetime Of Learning
As we age, our brain has the potential to form new connections between neurons. Having a creative outlet such as painting or coding can help improve cognitive functioning. Without cognitive functioning, we'd be forgetful and unable to solve problems . If you're passionate about learning or are looking to learn new skills or hobbies, The Cyber Monday Online Course Lifetime Bundle: StackSkills + In
3d
Workplace homophobia rises during recessions
Gay men experience increased discrimination in the labor market during times of economic recession, with significant discrepancies in pay and offers of job interviews compared to heterosexual men, according to a study by Anglia Ruskin University (ARU).
3d
Computational tools for genomic data de-identification: facilitating data protection law compliance
Nature Communications, Published online: 29 November 2021; doi:10.1038/s41467-021-27219-2 In this opinion piece, we discuss why computational tools to limit the identifiability of genomic data are a promising avenue for privacy-preservation and legal compliance. Even where these technologies do not eliminate all residual risk of individual identification, the law may still consider such data anon
3d
A general strategy for C(sp3)–H functionalization with nucleophiles using methyl radical as a hydrogen atom abstractor
Nature Communications, Published online: 29 November 2021; doi:10.1038/s41467-021-27165-z When carbon-based units are functionalized in photoredox catalysis, electrophilic coupling partners are often used, such that the polarities of the two fragments are appropriately matched. Here the authors show a generalized methodology to instead use nucleophilic coupling partners, which are cheaper and oft
3d
Noise-induced barren plateaus in variational quantum algorithms
Nature Communications, Published online: 29 November 2021; doi:10.1038/s41467-021-27045-6 Variational quantum algorithms (VQAs) are a leading candidate for useful applications of near-term quantum computing, but limitations due to unavoidable noise have not been clearly characterized. Here, the authors prove that local Pauli noise can cause vanishing gradients rendering VQAs untrainable.
3d
Growth of lithium-indium dendrites in all-solid-state lithium-based batteries with sulfide electrolytes
Nature Communications, Published online: 29 November 2021; doi:10.1038/s41467-021-27311-7 Li-In alloys are widely used as reference materials in the research field of solid-state lithium-based batteries. Here, the authors report and discuss the instability of Li-In electrodes towards sulfide solid electrolytes in all-solid-state batteries.
3d
Two-colour single-molecule photoinduced electron transfer fluorescence imaging microscopy of chaperone dynamics
Nature Communications, Published online: 29 November 2021; doi:10.1038/s41467-021-27286-5 Revealing mechanisms of complex protein machines requires simultaneous exploration of multiple structural coordinates. Here the authors report two-colour fluorescence microscopy combined with photoinduced electron transfer probes to simultaneously detect two structural coordinates in single protein molecules
3d
Ensuring scientific reproducibility in bio-macromolecular modeling via extensive, automated benchmarks
Nature Communications, Published online: 29 November 2021; doi:10.1038/s41467-021-27222-7 Computational methods are becoming an increasingly important part of biological research. Using the Rosetta framework as an example, the authors demonstrate how community-driven development of computational methods can be done in a reproducible and reliable fashion.
3d
Bone marrow sinusoidal endothelium controls terminal erythroid differentiation and reticulocyte maturation
Nature Communications, Published online: 29 November 2021; doi:10.1038/s41467-021-27161-3 Niche crosstalk with Haematopoietic cells underlies normal haematopoiesis and myeloid disorders. Here the authors report a Stabilin2-Cre driver mouse with Cre-activity restricted to bone marrow sinusoidal endothelial cells, and that Stabilin2-Cre driven overactivation of b-catenin leads to erythroid differen
3d
David Argyle – brave, resilient and progressive
"I have worked at several universities in my career, and never have I encountered the degree of bullying, harassment, intimidation, and discrimination that I have here. The atmosphere is utterly toxic, and everyone is scared to say anything in case it is heard and reported to [David Argyle] or [Richard Mellanby]. It is like working with the East German Stasi." – Dr Andrew Brown, deceased
3d
Studies/ articles on deja vu, dreams, premonitions.
Hi folks. My wife seems to have deja vu experiences which she claims are related to vivid dreams she's had in the past. I tend to look at life from a scientific, materialist POV and I'm wondering what prominent studies or articles exist to help explain these phenomena. TIA. submitted by /u/OlFenster [link] [comments]
3d
Can you solve it? Yule devour these festive treats
Advent(ures) in numberland UPDATE: The answers can be read here Every year the remarkable maths website Mathigon runs a puzzle advent calendar, publishing a problem a day from December 1 to 24. I've had a peek at this year's puzzles and selected three of the ones I liked the most. 1. The seven digits Continue reading…
3d
Pareidoli
är en psykologisk effekt där vi människor ser mönster i föremål där det egentligen inte finns ett mönster. Väldigt ofta handlar det om ansikten – den mänskliga hjärnan har … Continued Inlägget Pareidoli dök först upp på Vetenskap och Folkbildning .
3d
Starwatch: Taurus and Orion point way to Cetus the sea monster
Obscure constellation's name features in Perseus myth as beast denied chance to devour Andromeda This week presents a good chance to see one of the more obscure autumn constellations: Cetus, the sea monster. Sometimes referred to as a whale, Cetus is part of the myth of Perseus, which includes the other constellations Pegasus, Cassiopeia, Andromeda, and Cepheus. In the story, Perseus rescues Andr
3d
These 20 Headphones And Earbuds Are Still Discounted At Black Friday Prices
Over-ear, in-ear, open-air — we have headphones of all kinds on sale this Black Friday, all at 20% off our already discounted prices. With 20 makes and styles to choose from, we're sure you are going to find a pair that's true music to your ears. xFyro xS2 Waterproof Wireless Earphones Don't you wish that you could groove to your music while you're swimming laps at the pool? Thanks to these water
3d
Pick Up These Award-Winning Game Titles for Less This Black Friday
If you're looking for a new game obsession, or want to relive a fond memory from a game you used to love, these 15 titles are sure to please old and new fans alike. These titles are aimed to entertain for hours on end whether you're into RPG's, shooters, sims, or anything else. Best of all, they come at a fraction of the cost of brand new games. As a part of our limited time Black Friday Sale you
3d
Scientists Model What Would Happen if a Mini Black Hole Punched Through the Moon
The lunar surface is a record of the solar system's violent origins . But look closely enough and we may find something even more exotic there—the cratered remains of an impact with a black hole the size of an atom, birthed in the first moments of the universe. According to a theory proposed by Bernard Carr and Stephen Hawking in the 1970s, the conditions just after the Big Bang were so energetic
3d

 

Leave a Reply