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Science & Environment / ScienceDaily

Stronger treatments could cure Chagas disease

Researchers have found that a more intensive, less frequent drug regimen with currently available therapeutics could cure the infection that causes Chagas disease.

30 Oct 2020 2:46 am
Path to nanodiamond from graphene found

Researchers expand their theory on converting graphene into 2D diamond, or diamane.

30 Oct 2020 2:46 am
High-sugar diet can damage the gut, intensifying risk for colitis

Mice fed diets high in sugar developed worse colitis, a type of inflammatory bowel disease (IBD), and researchers examining their large intestines found more of the bacteria that can damage the gut's protective mucus layer.

29 Oct 2020 11:50 pm
Direction decided by rate of coin flip in quantum world

Flip a coin. Heads? Take a step to the left. Tails? Take a step to the right. In the quantum world? Go in both directions at once, like a wave spreading out. Called the walker analogy, this random process can be applied in both classical and quantum algorithms used in state-of-the-art technologies such as artificial intelligence and data search processes. However, the randomness also makes the walk difficult to control, making it more difficult to precisely design systems.

29 Oct 2020 11:50 pm
Touch and taste? It's all in the tentacles

Scientists identified a novel family of sensors in the first layer of cells inside the suction cups that have adapted to react and detect molecules that don't dissolve well in water. The research suggests these sensors, called chemotactile receptors, use these molecules to help the animal figure out what it's touching and whether that object is prey.

29 Oct 2020 11:50 pm
Spring-run and fall-run Chinook salmon aren't as different as they seem

Historically, spring-run and fall-run Chinook salmon have been considered as separate subspecies, races, ecotypes, or even as separate species of fish. A new genetic analysis, however, shows that the timing of migration in Chinook salmon is determined entirely by differences in one short stretch of DNA in their genomes.

29 Oct 2020 11:50 pm
Molecular compass for cell orientation

Plants have veins that transport nutrients through their body. These veins are highly organized. The hormone auxin travels directionally from cell-to-cell and provides cells with positional information, coordinating them during vein formation and regeneration. Scientists now discovered how cells translate auxin signals into forming a complex system of veins. This phenomenon also applies to wound healing and might lead to more mechanically resistant plants and further agricultural implications.

29 Oct 2020 11:49 pm
Study of ancient dog DNA traces canine diversity to the Ice Age

A global study of ancient dog DNA presents evidence that there were different types of dogs more than 11,000 years ago in the period immediately following the Ice Age.

29 Oct 2020 11:49 pm
Denisovan DNA in the genome of early East Asians

Researchers analyzed the genome of the oldest human fossil found in Mongolia to date and show that the 34,000-year-old woman inherited around 25 percent of her DNA from western Eurasians, demonstrating that people moved across the Eurasian continent shortly after it had first been settled by the ancestors of present-day populations. This individual and a 40,000-year-old individual from China also carried DNA from Denisovans, an extinct form of hominins that inhabited Asia before modern humans ar

29 Oct 2020 11:47 pm
Positive outlook predicts less memory decline

The happier we feel, the less likely we are to experience memory decline.

29 Oct 2020 11:25 pm
Study helps explain why motivation to learn declines with age

Neuroscientists have identified a brain circuit critical for learning to make decisions that require evaluating the cost or reward of an action. They showed this circuit is negatively affected by aging and in Huntington's disease.

29 Oct 2020 2:44 am
Leaving more big fish in the sea reduces carbon dioxide emissions

Leaving more big fish -- like tuna, sharks, mackerel and swordfish -- in the sea reduces the amount of carbon dioxide released into the Earth's atmosphere. This is because when a fish dies in the ocean it sinks to the depths and sequestrates all the carbon it contains with it. This is a form of 'blue carbon'. Big fish are about 10 to 15 percent carbon.

29 Oct 2020 12:01 am
Juno data indicates 'sprites' or 'elves' frolic in Jupiter's atmosphere

An instrument on NASA's Juno mission spacecraft may have detected transient luminous events -- bright flashes of light in the gas giant's upper atmosphere.

29 Oct 2020 12:01 am
Using a volcano's eruption 'memory' to forecast dangerous follow-on explosions

Stromboli, the 'lighthouse of the Mediterranean', is known for its low-energy but persistent explosive eruptions, behaviour that is known scientifically as Strombolian activity. Occasionally, however, more intense and sudden explosions occur, most recently in July and August last year (2019). These are known as 'Strombolian paroxysms'. During such events several of Stromboli's craters are active simultaneously and much greater volumes of pyroclastic materials are erupted than is usual for the vo

28 Oct 2020 11:10 pm
Researchers map genomes of agricultural 'monsters'

Biologists are unlocking the genomes of creepy agricultural pests like screwworms that feast on livestock from the inside out and thrips that transmit viruses to plants.

28 Oct 2020 11:10 pm
Astronomers discover activity on distant planetary object

A team of astronomers, earlier this year announced their discovery of activity emanating from Centaur 2014 OG392, a planetary object first found in 2014. As a result of the team's discovery, the Centaur has recently been reclassified as a comet, and will be known as 'C/2014 OG392 (PANSTARRS).'

28 Oct 2020 10:15 pm
Cracking the secrets of dinosaur eggshells

Since the famous discovery of dinosaur eggs in the Gobi Desert in the early 1920s, the fossilized remains have captured the imaginations of paleontologists and the public, alike. Although dinosaur eggs have now been found on every continent, it's not always clear to scientists which species laid them. Now, researchers have narrowed down the list for an unknown eggshell from Mexico by comparing its microstructure and composition with four known samples.

28 Oct 2020 10:15 pm
An artificial cell on a chip

Researchers have developed a precisely controllable system for mimicking biochemical reaction cascades in cells. Using microfluidic technology, they produce miniature polymeric reaction containers equipped with the desired properties. This 'cell on a chip' is useful not only for studying processes in cells, but also for the development of new synthetic pathways for chemical applications or for biological active substances in medicine.

28 Oct 2020 7:48 pm
Specific and rapid expansion of blood vessels

Upon a heart infarct or stroke, rapid restoration of blood flow, and oxygen delivery to the hypo perfused regions is of eminent importance to prevent further damage to heart or brain. Arterial diameter is a critical determinant of blood flow conductance. Scientists have now discovered a novel mechanism to structurally increase arterial diameter by selectively increasing the size of arterial endothelial cells, thereby allowing rapid increases in flow.

28 Oct 2020 7:48 pm
Scientists map structure of potent antibody against coronavirus

Scientists have shown that a potent antibody from a COVID-19 survivor interferes with a key feature on the surface of the coronavirus's distinctive spikes and induces critical pieces of those spikes to break off in the process.

28 Oct 2020 12:05 am
Beaches can survive sea-level rises as long as they have space to move

An international team of coastal scientists has dismissed suggestions that half the world's beaches could become extinct over the course of the 21st century.

27 Oct 2020 11:07 pm
Scientists use clues in the human genome to discover new inflammatory syndrome

Researchers have discovered a new inflammatory disorder called vacuoles, E1 enzyme, X-linked, autoinflammatory and somatic syndrome (VEXAS), which is caused by mutations in the UBA1 gene. VEXAS causes symptoms that included blood clots in veins, recurrent fevers, pulmonary abnormalities and vacuoles (unusual cavity-like structures) in myeloid cells.

27 Oct 2020 11:07 pm
How to design organic solar cell materials

Scientists have recently scrutinized organic solar cells and derived design rules for light-absorbing dyes that can help to make these cells more efficient, while tailoring the absorption spectrum of the cells to the needs of the chosen application.

27 Oct 2020 11:07 pm
Empathy may be in the eye of the beholder

Do we always want people to show empathy? Not so, said researchers. A recently published article suggests that although empathy is often portrayed as a virtue, people who express empathy are not necessarily viewed favorably.

27 Oct 2020 11:07 pm
Antarctica yields oldest fossils of giant birds with 21-foot wingspans

Some of the largest birds in history, called pelagornithids, arose a few million years after the mass extinction that killed off the dinosaurs and patrolled the oceans with giant wingspans for some 60 million years. A team of paleontologists has found two fossils -- each from individual pelagornithids with wingspans of 20 feet or more -- that show this gigantism arose at least 50 million years ago and lasted at least 10 million years.

27 Oct 2020 11:07 pm
Aerosol microdroplets inefficient carriers of COVID-19 virus

Aerosol microdroplets do not appear to be extremely efficient at spreading the virus that leads to COVID-19. While the lingering microdroplets are certainly not risk-free, due to their small size they contain less virus than the larger droplets that are produced when someone coughs, speaks, or sneezes directly on us, said researchers.

27 Oct 2020 8:42 pm
Random effects key to containing epidemics

Scientists have discovered why dividing a large population into multiple subpopulations that do not intermix can help contain outbreaks without imposing contact restrictions within those local communities.

27 Oct 2020 8:42 pm
Black Hispanic individuals hardest hit by COVID-19

A new study shows the disproportionate impact of COVID-19 on Hispanic groups within the United States, with the most severe outcomes, including death and intensive care, among Hispanic Black individuals.

27 Oct 2020 8:42 pm
Gran Telescopio Canarias finds the farthest black hole that belongs to a rare family of galaxies

Astronomers have identified one of the rarest known classes of gamma-ray emitting galaxies, called BL Lacertae, within the first 2 billion years of the age of the universe.

27 Oct 2020 8:24 pm
Galaxies in the infant universe were surprisingly mature

ALMA telescope conducts largest survey yet of distant galaxies in the early universe.

27 Oct 2020 8:24 pm
Biomarkers could be used in a quick, inexpensive COVID-19 blood screening tool

A new study suggests that COVID-19 affects the human body's blood concentration levels of specific metabolites -- small molecules broken down in the human body through the process of metabolism. Three specific metabolites identified in this study could act as biomarkers and one day be measured through an inexpensive blood test to quickly screen patients for the disease and predict which patients will become most critically ill.

27 Oct 2020 8:24 pm
Species loss affects basis of life of humans

Current species loss also affects our food, water supply, building materials and energy sources. This is confirmed by one of the biggest biodiversity experiments. Researchers found that ecosystem functions cannot only be predicted from the properties of plants, but that the entire complexity of biotic and abiotic interactions has to be considered.

27 Oct 2020 8:24 pm
For vampire bats, social distancing while sick comes naturally

New research shows that when vampire bats feel sick, they socially distance themselves from groupmates in their roost -- no public health guidance required.

27 Oct 2020 8:24 pm
Geologists simulate soil conditions to help grow plants on Mars

Humankind's next giant step may be onto Mars. But before those missions can begin, scientists need to make scores of breakthrough advances, including learning how to grow crops on the red planet.

27 Oct 2020 8:24 pm
Scientists discover how a common mutation leads to 'night owl' sleep disorder

People with delayed sleep phase disorder are unable to fall asleep until late at night (often after 2 a.m.) and have difficulty getting up in the morning. In 2017, scientists discovered a surprisingly common mutation that causes this sleep disorder by altering a key component of the biological clock that maintains the body's daily rhythms. Now, a new study reveals the molecular mechanisms involved and point the way toward potential treatments.

27 Oct 2020 8:23 pm
Back to the future of climate

Hot and humid: Using minerals from ancient soils, researchers are reconstructing the climate that prevailed on Earth some 55 million years ago. Their findings will help them to better assess how our climate might look in the future.

27 Oct 2020 8:23 pm
Small mussels in the Baltic are getting even smaller

Blue mussels in the Baltic Sea are getting smaller with time but bigger in numbers, according to a new study. Analyzing data from the last 24 years, the main reason for this appears to be changes in food quality. The type of phytoplankton that is available for blue mussels to eat can in turn be linked to our changing climate.

27 Oct 2020 8:23 pm
Large tides may have driven evolution of fish towards life on land

Big tidal ranges some 400 million years ago may have initiated the evolution of bony fish and land vertebrates. This theory is now supported by researchers who, for the first time, have used established mathematical models to simulate tides on Earth during this period.

27 Oct 2020 8:23 pm
Over 80 percent of COVID-19 patients have vitamin D deficiency, study finds

Over 80 percent of 200 COVID-19 patients in a hospital in Spain have vitamin D deficiency, according to a new study.

27 Oct 2020 6:52 pm
Floating gardens: More than just a pretty place

Floating gardens sound so idyllic. Now, a study proves that they are more than just a pretty place. The study demonstrates that such constructed gardens can have a measurable, positive impact on water quality.

27 Oct 2020 4:10 am
DrugCell: New experimental AI platform matches tumor to best drug combo

Researchers use experimental artificial intelligence system called DrugCell to predict the best approach to treating cancer.

27 Oct 2020 2:19 am
Sea-level rise global observing system proposed

A researcher proposes a new approach to monitoring global sea-level rise. Using the existing NOAA Global Drifter Program array of roughly 1,200 buoys that drift freely with ocean currents, he suggests adding additional instruments to record their height, or the 'level of the sea' they ride on, to collect long-term data on the average sea levels across the world's oceans.

27 Oct 2020 2:14 am
New insights into a potential target for autoimmune disease

With insights into a molecular pathway that regulates the activity of Tregs, a type of T cell involved in immunosuppression, new research opens up possibly new avenues for treating inflammatory and autoimmune diseases.

27 Oct 2020 2:14 am
New map of the immune landscape in pancreatic cancer could guide immunotherapy

A new analysis highlights the diversity of immune response in pancreatic cancer, and points toward the need for treatments tailored to individual patients.

27 Oct 2020 2:14 am
Material properties for longer-lasting, more efficient solar cells

Researchers are helping to understand the fundamental processes in a material known as perovskites, work that could lead to more efficient solar cells that also do a better job of resisting degradation.

27 Oct 2020 2:14 am
On-surface synthesis of graphene nanoribbons could advance quantum devices

Scientists have synthesized graphene nanoribbons -- ultrathin strips of carbon atoms -- on a titanium dioxide surface using an atomically precise method that removes a barrier for custom-designed carbon nanostructures required for quantum information sciences.

27 Oct 2020 2:14 am
Wildlife flock to backyards for food from people

A new study helps explain why some animals are sometimes more often found in suburban areas than wild ones.

27 Oct 2020 2:14 am
Greenhouse effect of clouds instrumental in origin of tropical storms

With the tropical storm season in the Atlantic Ocean underway and already well into the Greek alphabet for naming, better storm track prediction has allowed timely evacuations and preparations. However, the formation and intensification of these storms remains challenging to predict, according to an international team of researchers who are studying the origin of tropical cyclones.

27 Oct 2020 1:10 am
Most dentists have experienced aggression from patients

Roughly half of US dentists experienced verbal or reputational aggression by patients in the past year, and nearly one in four endured physical aggression, according to a new study.

27 Oct 2020 1:09 am