SARS-CoV-2 Spike Protein Shares Sequence with a Human Protein
Eight amino acids are identical to part of the human epithelial sodium channel, leading researchers to suspect the virus might interfere with the channel’s function.
There are two types of burping, but mainly we burp to get rid of swallowed air from our stomach.
There aretwo typesof burping. The first is known as gastric burping, which comes from your stomach. It is the most common type of burp.
Gastric burping is a normal way our body gets rid of swallowed air. We may not realise it, but every time we swallow food, around atablespoon worth of airalso enters our stomach.
Eventually, this buildup of air stretches the stomach and causes both the valves to relax at both thetopandbottomof your food pipe.
For the air that escapes upwards from your stomach, your muscleshelp to push the air out. These muscles are in a part of your body called your “diaphragm”, and also the muscles at the front of your tummy, which you might call your “abs” or “six-pack”.
These muscles push the air up your oesophagus and then out of your mouth (or sometimes your nose!).
India expands use of controversial drug for coronavirus despite safety concerns Top medical agency says its studies show hydroxychloroquine can prevent infection, but regulators in other countries are investigating adverse effects.
SARS-CoV-2 Protein Hampers Innate Immune Reaction In Vitro
The viral protein known as ORF3b limits the induction of the type I interferon response, which typically alerts other immune system components to the presence of a virus, in cultured cells.
The Kármán line is an attempt to define a boundary between Earth's atmosphere and outer space. This is important for legal and regulatory measures; aircraft and spacecraft fall under different jurisdictions and are subject to different treaties.
Excited delirium: How debatable excuses can be used to defend some cases of police brutality
Excited (or agitated) delirium is characterized by agitation, aggression, acute distress and sudden death, often in the pre-hospital care setting. It is typically associated with the use of drugs that alter dopamine processing, hyperthermia, and, most notably, sometimes with death of the affected person in the custody of law enforcement. Subjects typically die from cardiopulmonary arrest, although the cause is debated. Unfortunately an adequate treatment plan has yet to be established, in part due to the fact that most patients die before hospital arrival. While there is still much to be discovered about the pathophysiology and treatment, it is hoped that this extensive review will provide both police and medical personnel with the information necessary to recognize and respond appropriately to excited delirium.
What is ‘excited delirium’?
Excited delirium is a controversial diagnosis, often used when people die in police custody.
Whether it actually exists is debated among experts and police forces alike, but people with excited delirium are said to be aggressive and incoherent, with “superhuman strength” imbued by their taking stimulant drugs such as cocaine.
Critics of the term have dismissed it as pseudo-science, a convenient excuse used to justify excessive police force
Critics argue that it’s not a legitimate cause of death, with police using it as an excuse when arrests involve avoidable deaths, and say the term is disproportionately cited in cases where black and Hispanic men die in custody.
Preliminary Research Says 70% of Those Infected With Coronavirus Don't Pass It On
Japan's success stems from adherence to the "3 C's rule." The government told people to avoid closed spaces, crowded places, and close-contact settings – all of which are ripe for superspreading events.
Why Sleep Deprivation Kills Going without sleep for too long kills animals. Newly published work suggests that the answer lies in an unexpected part of the body.
A Digital Locksmith Has Decoded Biology’s Molecular Keys
Neural networks have been taught to quickly read the surfaces of proteins — molecules critical to many biological processes. The advance is already being used to create defenses for the virus responsible for COVID-19.
Despite the popularity of spicy cuisine among Homo sapiens, the hotness in chili peppers has always been something of an evolutionary mystery.
A plant creates fruit in order to entice animals to eat and disperse its seeds, so it doesn't make sense for that fruit to be painfully hot, said University of Florida zoology professor and evolutionary ecologist Douglas Levey.
But according to new research by Levey and six colleagues from other universities, chilies have a very good reason to make themselves hot. It boils down to protection.
Based on research on wild chili plants in rural Bolivia, the scientists found that the leading cause of seed mortality is a fungus called Fusarium. The fungus invades the fruits through wounds made by insects and destroys the seeds before they can be eaten and dispersed.
Capsaicin, the chemical that makes the peppers hot, drastically slows microbial growth and protects the fruit from Fusarium. And while capsaicin deters local mammals, such as foxes and raccoons, from consuming the chilies, birds don't have the physiological machinery to detect the spicy chemical and continue to eat the peppers and disperse seeds, Levey said.
The researchers' findings will be released today in a paper published online by theProceedings of the National Academy of Sciences.
The term tear gas refers to a group of chemical irritants that can be used to control or disperse crowds. The chemicals that are used for this purpose cause irritation of mucous membranes and of the eyes including tearing (hence the name “tear gas”), twitching around the eyes, cough, difficulty breathing and irritation to the skin.
They arebelieved to be short-term irritantsand unlikely to kill or cause permanent harm, especially if delivered at relatively low levels, on a single occasion and in open spaces. At high levels in closed spaces, though, theycan be lethal.
The chemicals are solids, not gasses, but may be delivered dispersed as aerosols in pyrotechnic mixtures that disperse the chemical during the explosion or in solutions delivered as a spray. There are multiple tear gas chemicals, the most likely of which is called 2-chlorobenzalmalonitrile or CS, which was named forBen Corson and Roger Stoughton, American chemists who invented it in 1928. CS was adopted as the official militaryriot controlchemical in 1959. There have been many instances of tear gas use around the world.
However, there is little human data on specific vulnerable populations.
Is tear gas a chemical weapon?
The 1993 InternationalChemical Weapons Convention, Geneva banned tear gas from being used where military forces are at war. However, a number of countries, including the U.S., have approved the use of tear gas for civilian riot control and for crowd control of non-military persons.
Glacier mice: these herds ofmoss-ballsroam the ice – and we’re uncovering their mysteries
Glacier mice don’t appear on just any ice sheet – there are only a few glaciers worldwide where they can be found. In 2012, we travelled to one called Falljökull tostudy their movements.
We dissected some of these moss balls and inserted accelerometers. These devices measure movement, and are used to orient mobile phones so that if you rotate them, their displays turns accordingly. The data we collected from accelerometers helped crack the puzzle of how moss in contact with the ice can survive when other plants would usually die.
The glacier mice rotated often, at least once every few days. It is this rotation that enables the glacier mice to grow moss around the whole of their outer surfaces – sometimes creating near perfect spheres. If the glacier mice stopped rotating, the moss that comes into permanent contact with the glacier surface would die.
Glacier mice are often found teetering on icy pedestals, and that’s because each of these moss balls actually reduces the amount of melting that occurs underneath it. So over a period of hours and days, the glacier mouse becomes elevated on a pedestal of ice and it eventually rolls off.
This process repeats itself over and over, so that the ball exposes a different surface to the sun each time it falls. In time, this means the moss ball rotates often and evenly enough to prevent any part staying in contact with the ice too long.
Recent research onglacier mice in Alaskafound that glacier mice can live for more than six years in this pattern. But scientists still don’t know why groups of glacier mice tend tomove herd-likeon the ice surface, sometimes south, sometimes west, but always in concert with each other. Wind, gravity and melting patternsaren’t enoughto fully explain the mystery, so research continues.
Reasons Why The Coronavirus Is Not ‘Man-made’ Controversial claims over the coronavirus’ origin have proliferated on the internet. Here, we examine the scientific evidence that supports its natural origins.
In a genome-wide association study, variants in both theABOblood group locus and a cluster of genes on human chromosome 3 are more common among COVID-19 patients with respiratory failure than in the general population.
The researchers used mass spectrometry to identify 13 toxin-like proteins in this lethal fraction. Some of the jellyfish proteins were similar to harmful enzymes and proteins found in poisonous snakes, spiders and bees. Instead of any one toxin being lethal, it's likely that multiple poisons work in concert to cause death, the researchers say.
Thousands of scientists worldwide went on strike for Black lives Academics and scientific organizations stopped research activities on 10 June to reflect and take action on systemic inequalities in science.
Which factors control the height of mountains? A surprising answer: It is not erosion and weathering of rocks that determine the upper limit of mountain massifs, but rather an equilibrium of forces in the Earth's crust.
New insight into the Great Dying: A new study shows for the first time that the collapse of terrestrial ecosystems during Earth's most deadly mass extinction event was directly responsible for disrupting ocean chemistry.
Pretty in pink: India crater lake changes colour overnight
A crater lake in India's western Maharashtra state has turned pink overnight, delighting nature enthusiasts and surprising experts who attributed it to changing salinity levels and the presence of algae in the water.
An international team of more than 170 physicists published the most reliable prediction so far for the theoretical value of the muon's anomalous magnetic moment
New Horizons conducts the first interstellar parallax experiment
New Horizons conducts the first interstellar parallax experiment .... For the first time, a spacecraft has sent back pictures of the sky from so far away that some stars appear to be in different positions than we'd see from Earth.
Why testing negative for coronavirus isn't a guarantee you don't have COVID-19
The timing of testing is critical. The amount of virus or viral load of the person being tested affects the test result. A low viral load, which can occur in the very early stage of the disease or during the recovery phase, could give a false negative result. Anyone with symptoms consistent with COVID should stay at home – period – even if their test is negative. "It's not that you don't have COVID; it's just that the test is not that reliable."
It could be negative because it's too early, it could be negative because it's too late, it could be negative because the test wasn't done properly. There are many, many reasons why the test could be negative.
Females in India at Higher Risk of Death from Coronavirus Than Males, Shows Study
Coronavirus is Killing More Men than Women. In India, it seems, It’s the Opposite! Females in India at Higher Risk of Death from Coronavirus Than Males, Shows Study
Scientists Say They've Figured Out How to Get Usable Energy From Plants: they have produced hydrogen from plants in a development that they hope could eventually lead to using vegetation to produce electricity.
Spectacular bird's-eye view? Hummingbirds see diverse colors humans can only imagine
To find food, dazzle mates, escape predators and navigate diverse terrain, birds rely on their excellent color vision.
Humans are color-blind compared to birds and many other animals
Humans have three types of color-sensitive cones in their eyes—attuned to red, green and blue light—but birds have a fourth type, sensitive to ultraviolet light. "Not only does having a fourth color cone type extend the range of bird-visible colors into the UV, it potentially allows birds to perceive combination colors like ultraviolet+green and ultraviolet+red—but this has been hard to test.
To investigate how birds perceive their colorful world, a research team established a new field system for exploring bird color vision in a natural setting. Working at the Rocky Mountain Biological Laboratory (RMBL) in Gothic, Colorado, the researchers trained wild broad-tailed hummingbirds (Selasphorus platycercus) to participate in color vision experiments.
"Nonspectral" color combinations, which involve hues from widely separated parts of the color spectrum, as opposed to blends of neighboring colors like teal (blue-green) or yellow (green-red) were studied. For humans, purple is the clearest example of a nonspectral color. Technically, purple is not in the rainbow: it arises when our blue (short-wave) and red (long-wave) cones are stimulated, but not green (medium-wave) cones.
While humans have just one nonspectral color—purple, birds can theoretically see up to five: purple, ultraviolet+red, ultraviolet+green, ultraviolet+yellow and ultraviolet+purple.
The experiments revealed that hummingbirds can see a variety of nonspectral colors, including purple, ultraviolet+green, ultraviolet+red and ultraviolet+yellow. For example, hummingbirds readily distinguished ultraviolet+green from pure ultraviolet or pure green, and they discriminated between two different mixtures of ultraviolet+red light—one redder, one less so.
Researchers report that they successfully tapped into speech and music inside an apartment simply by focusing on a light bulb
In a paper published over the weekend, the researchers said all they needed were a telescope and a $400 optical sensor, which they used to measure barely perceptible light bulb vibrations triggered by either voices or music in the room.
The research team conducted the test by pointing a telescope situated in a bridge towards a light bulb in an apartment building 27 yards away. Capturing the vibrations from the bulb, they were able to reconstruct, with a fair degree of fidelity, "Let It Be" by the Beatles, "Clocks" by Coldplay and a snippet of a speech by President Trump.
Researchers have shown that how fluctuations in the air pressureon the surface of the hanging bulb (in response to sound), which cause the bulb to vibrate very slightly (a millidegree vibration), can be exploited by eavesdroppers to recover speech and singing, passively, externally, and in real time.
They noted that a direct line of sight to the bulb is required; lampshades or window curtains will prevent it from working. Also, the test sounds were played at maximum volume. You just need line of sight to a hanging bulb, and this is it.
The approach, called "lamphone," is an improvement over recent developments in eavesdropping technology.
Any sound in the room can be recovered from the room with no requirement to hack anything and no device in the room.
Visible matter—everything from pollen to stars and galaxies—accounts for roughly 15% of the total mass of the universe. The remaining 85% is made of something entirely different from things we can touch and see: dark matter. Despite overwhelming evidence from the observation of gravitational effects, the nature of dark matter and its composition remain unknown.
How can physicists study dark matter beyond gravitational effects if it is practically invisible? Researchers are pursuing three approaches:
indirect detection with astronomical observatories searching for the decay products of dark-matter annihilation in galactic centres
direct detection with highly sensitive low-background experiments looking for dark matter scattering off nuclei
creating dark matter in the controlled laboratory environment of the Large Hadron Collider (LHC) at CERN.
Although successful at describingelementary particlesand their interactions at low energies, the Standard Model of particle physics does not include a viable dark-matter particle. The only possible candidates, neutrinos, do not have the right properties to explain the observed dark matter. To remedy this problem, a simple theoretical extension of the Standard Model posits that existing particles, such as the Higgsboson, act as a "portal" between known particles and dark-matter particles. Since the Higgs boson couples to mass, massive dark-matter particles should interact with it. The Higgs boson still has large uncertainties associated with the strength of its interaction with Standard Model particles; up to 30% of the Higgs-boson decays can potentially be invisible, according to the latestATLAS combined Higgs-boson measurements.
Could some of the Higgs bosons decay into dark matter? As dark matter does not interact directly with the ATLAS detector, physicists look for signs of "invisible particles," inferred through momentum conservation of the proton–proton collision products. According to the Standard Model, the fraction of Higgs bosons decaying to an invisible final state (four neutrinos!) accounts for just 0.1% and is thus negligible. Should such events be observed, it would be a direct indication of new physics and potential evidence of Higgs bosons decaying into dark-matter particles.
Disclosure of climate-related financial risks not enough to drive action
While risk disclosure can support a market-driven transition towards a more sustainable financial system, it is only one part of the puzzle. To ensure its success the TCFD Framework should be updated to incorporate consideration of other crucial factors."
The study identified that in addition todisclosure, it is equally important to ensure the appropriate incentives to disclose, the mechanisms to enable market discipline and supply chain compliance.
A team of researchers has found a possible reason for West Antarctica warming faster than East Antarctica. In their paper published in the journal Science Advances, the group describes their study of surface and air temperature trends in the region over the past several decades in which they applied math models to the problem, and what they found.
Scientists have known for some time that Antarctica has been warming asymmetrically due to global warming, but they have not known why. To find an explanation for the differences, the researchers began with the assumption that such differences were likely due to natural climate variability To find out if this might be the case, they carried out a two-part study.
The first part of the study involved studying climate data for the region over the years 1958 to 2012. Their goal was to see if they could spot trends. The second part of the study involved applying an empirical orthogonal function to the weather data to explain variability over time. In so doing, they found that warming sea surface temperatures in the Bellingshausen Antarctic and Amundsen seas appeared to be a driving force behind the asymmetrical warming. They also found variability in surface air temperatures over the course of multiple decades, which they attributed to climate fluctuations in the tropics (such as the El Niño Southern Oscillation)—they suggest such fluctuations also likely play a role in differences in the amount of warming in Antarctica.
More specifically, the researchers found that the asymmetric conditions originated from the harmony of the feedback between the atmosphere over the ocean versus that over the terrain. And warmer sea temperatures near the western parts of Antarctica had a positive feedback with the upper atmospheric conditions found over the western parts of the region. And finally, they report that the strength of the feedback in the region was controlled by the topography and an annual cycle. They conclude their assessment by suggesting that the climate differences that have been observed in the region are likely due to natural climate variability factors responding to global warming.
The researchers also suggest that natural climate factors could also result in spikes in temperatures over the eastern parts of Antarctic in the coming years, even as western parts of the region continue to see rising temperatures. They note that such conditions could lead to ice sheet collapse, adding to a rise in sea levels.
New species extinction target proposed for global nature rescue plan
In proposals published today in the journalScience, conservation experts are suggesting a long-term goal to reducespecies extinctionstowards natural rates, with an easily measurable objective of fewer than 20 extinctions a year.
It would apply to all describedspeciesacross the major taxonomic groups (fungi, plants, invertebrates and vertebrates) and ecosystem types, whether freshwater, marine or terrestrial.
How young embryos conduct quality control to become healthy fetuses ...
The first few days of embryonic development are a critical point for determining the failure or success of a pregnancy. Because relatively few cells make up the embryo during this period, the health of each cell is vital to the health of the overall embryo. But often, these young cells have chromosomal aneuploidies—meaning, there are too many or too few chromosome copies in the cell. Aneuploid cells lead to the failure of the pregnancy, or cause developmental defects such as Down syndrome later in gestation.
Researchers have found that the prevalence of aneuploidy is drastically lower as the embryo grows and develops
aneuploid cells are under chronic stress due to an imbalance in the production of proteins caused by the abnormal number of chromosomes. This stress in turn activates a process called autophagy that leads to the death of the abnormal cells.
Shruti Singla et al. Autophagy-mediated apoptosis eliminates aneuploid cells in a mouse model of chromosome mosaicism, Nature Communications (2020). DOI: 10.1038/s41467-020-16796-3
Dr. Krishna Kumari Challa
Cluster headache is more than ‘just a headache’ – but this excruciating condition is often misdiagnosed
https://theconversation.com/cluster-headache-is-more-than-just-a-he...
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https://theconversation.com/evolution-why-it-seems-to-have-a-direct...
Evolution: why it seems to have a direction and what to expect next
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https://phys.org/news/2020-06-stellar-snake-cosmic-neighborhood.htm...
Stellar 'snake' found in the cosmic neighborhood
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https://phys.org/news/2020-06-mysterious-interstellar-visitor-dark-...
Mysterious interstellar visitor was probably a 'dark hydrogen iceberg,' not aliens
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https://techxplore.com/news/2020-06-battery-components-recycled-fer...
Battery components recycled into fertilizer
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https://techxplore.com/news/2020-06-robot.html?utm_source=nwletter&...
What will it take for us to trust a robot?
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https://theconversation.com/hydrogen-cars-wont-overtake-electric-ve...
Hydrogen cars won’t overtake electric vehicles because they’re hampered by the laws of science
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How to avoid disinformation and misinformation on Facebook and Twitter
https://techxplore.com/news/2020-06-disinformation-misinformation-f...
Jun 3, 2020
Dr. Krishna Kumari Challa
How You Should Read Coronavirus Studies, or Any Science Paper
Published scientific research, like any piece of writing, is a peculiar literary genre.
https://www.nytimes.com/article/how-to-read-a-science-study-coronav...
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$$ https://phys.org/news/2020-06-poisoned-arrow-defeat-antibiotic-resi...
Researchers develop 'poisoned arrow' to defeat antibiotic-resistant bacteria
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https://phys.org/news/2020-06-people.html?utm_source=nwletter&u...
People try to do right by each other, no matter the motivation, study finds
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https://medicalxpress.com/news/2020-06-twins-sensitivity-partly-gen...
Study in twins finds our sensitivity is partly in our genes
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https://phys.org/news/2020-06-lefties-rightif-one-in-a-million-gard...
Two lefties make a right—if you are a one-in-a-million garden snail
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https://phys.org/news/2020-06-reveals-pathway-blocks-life.html?utm_...
Study reveals continuous pathway to building blocks of life
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https://phys.org/news/2020-06-synthetic-red-blood-cells-mimic.html?...
Synthetic red blood cells mimic natural ones, and have new abilities
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https://phys.org/news/2020-06-dark-energy-expansion-cosmic.html?utm...
New test of dark energy and expansion from cosmic structures
Jun 3, 2020
Dr. Krishna Kumari Challa
** https://www.the-scientist.com/news-opinion/sars-cov-2-spike-protein...
SARS-CoV-2 Spike Protein Shares Sequence with a Human Protein
Eight amino acids are identical to part of the human epithelial sodium channel, leading researchers to suspect the virus might interfere with the channel’s function.
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https://www.scientificamerican.com/article/how-to-transport-crucial...
How to Transport Crucial Vaccines without Cooling
Unlike vials, flexible films could preserve medicines for long periods, with no refrigeration needed
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Ladybird Beetle Inspired Compliant Origami and deployable wing module for multi-modal robot
Jun 3, 2020
Dr. Krishna Kumari Challa
A mirror image of Earth and sun
https://phys.org/news/2020-06-mirror-image-earth-sun.html?utm_sourc...
Jun 5, 2020
Dr. Krishna Kumari Challa
The modern world is fast becoming a wireless, infrared world
https://techxplore.com/news/2020-06-modern-world-fast-wireless-infr...
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https://techxplore.com/news/2020-06-robot-dog-hounds-thai-shoppers....
Robot dog hounds shoppers to keep hands virus-free
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https://phys.org/news/2020-06-molecules-captured-video-unprecedente...
Single molecules captured on video at an unprecedented 1,600 frames per second
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Jun 5, 2020
Dr. Krishna Kumari Challa
why do we burp?
There are two types of burping, but mainly we burp to get rid of swallowed air from our stomach.
There are two types of burping. The first is known as gastric burping, which comes from your stomach. It is the most common type of burp.
Gastric burping is a normal way our body gets rid of swallowed air. We may not realise it, but every time we swallow food, around a tablespoon worth of air also enters our stomach.
Eventually, this buildup of air stretches the stomach and causes both the valves to relax at both the top and bottom of your food pipe.
For the air that escapes upwards from your stomach, your muscles help to push the air out. These muscles are in a part of your body called your “diaphragm”, and also the muscles at the front of your tummy, which you might call your “abs” or “six-pack”.
These muscles push the air up your oesophagus and then out of your mouth (or sometimes your nose!).
https://theconversation.com/curious-kids-why-do-we-burp-137493?utm_...
Jun 5, 2020
Dr. Krishna Kumari Challa
Revolutionary microscopy technique sees individual atoms for first time
https://www.nature.com/articles/d41586-020-01658-1?utm_source=Natur...
Jun 5, 2020
Dr. Krishna Kumari Challa
India expands use of controversial drug for coronavirus despite safety concerns
Top medical agency says its studies show hydroxychloroquine can prevent infection, but regulators in other countries are investigating adverse effects.
https://www.nature.com/articles/d41586-020-01619-8?utm_source=Natur...
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https://www.wired.com/story/tear-gas-rubber-bullets-nonlethal-harm-...
Nonlethal’ Anti-Protest Weapons Can Cause Serious Harm
Jun 5, 2020
Dr. Krishna Kumari Challa
A Brief History of Human Coronaviruses
Milder, cold-causing members of this pathogenic viral family long remained under the radar, although they aren’t entirely harmless.
https://www.the-scientist.com/news-opinion/a-brief-history-of-human...
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SARS-CoV-2 Protein Hampers Innate Immune Reaction In Vitro
The viral protein known as ORF3b limits the induction of the type I interferon response, which typically alerts other immune system components to the presence of a virus, in cultured cells.
https://www.the-scientist.com/news-opinion/sars-cov-2-protein-hampe...
Jun 5, 2020
Dr. Krishna Kumari Challa
Some People May Have a Head Start Against Coronavirus, Surprising Evidence Shows
https://www.sciencealert.com/surprise-finding-suggests-some-people-...
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https://www.nationalgeographic.com/science/2018/12/where-is-the-edg...
Where, exactly, is the edge of space? It depends on who you ask.
With more countries and commercial companies heading into the stratosphere, the debate about how to define outer space is heating up.
https://en.wikipedia.org/wiki/K%C3%A1rm%C3%A1n_line#:~:text=The%20K...
The Kármán line is an attempt to define a boundary between Earth's atmosphere and outer space. This is important for legal and regulatory measures; aircraft and spacecraft fall under different jurisdictions and are subject to different treaties.
Jun 5, 2020
Dr. Krishna Kumari Challa
The oldest and largest known monument built by the Mayan civilisation has been found in Mexico. Called Aguada Fénix, it is a huge raised platform 1.4 kilometres long.
https://www.newscientist.com/article/2245181-weve-just-found-the-la...
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https://www.newscientist.com/article/2244765-parkinsons-disease-may...
Parkinson’s disease may spread from brain to gut and vice versa
Jun 5, 2020
Dr. Krishna Kumari Challa
Preserving fruits and vegetables in a natural way ....
Read the abstract at https://onlinelibrary.wiley.com/doi/abs/10.1002/adma.201908291.
This news release can be found online at https://news.rice.edu/2020/06/04/egg-based-coating-preserves-fresh-...
https://www.eurekalert.org/pub_releases/2020-06/ru-ecp060420.php
Egg-based coating preserves fresh produce
Jun 5, 2020
Dr. Krishna Kumari Challa
Why we should trust registered clinical trials
https://www.eurekalert.org/pub_releases/2020-06/bu-wws060420.php
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Jun 5, 2020
Dr. Krishna Kumari Challa
Oxidative stress and growth factors associated with development of high myopia
https://www.news-medical.net/news/20200604/Oxidative-stress-and-gro...
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Can you fold paper more than 7 times with hydraulic press
Jun 5, 2020
Dr. Krishna Kumari Challa
Scientists develop unique polymer coating to tackle harmful fungi
https://phys.org/news/2020-06-scientists-unique-polymer-coating-tac...
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https://techxplore.com/news/2020-06-shocker-japan-firms-electrifyin...
Shocker! Japan firms' electrifying fabric zaps bacteria
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https://medicalxpress.com/news/2020-06-microglia-olfactory-bulb-nos...
Microglia in the olfactory bulb have a nose for protecting the brain from infection
Jun 6, 2020
Dr. Krishna Kumari Challa
Thwarting deadly heart blockages with organic nanoparticles
https://phys.org/news/2020-06-thwarting-deadly-heart-blockages-nano...
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https://phys.org/news/2020-06-scientists-iron-physics-wrinkling.htm...
Scientists iron out the physics of wrinkling
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https://phys.org/news/2020-06-proton.html?utm_source=nwletter&u...
Physicists around the world are cracking open the proton, within the nucleus of the atom, to see what's inside.
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** https://phys.org/news/2020-06-thousands-tons-ocean-pollution-habits...
Thousands of tons of ocean pollution can be saved by changing washing habits
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https://phys.org/news/2020-06-anti-virus-masks-plague-hong-kong.htm...
Anti-virus face masks plague beaches
Jun 6, 2020
Dr. Krishna Kumari Challa
How researchers are dealing with the plastic problem ....
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https://techxplore.com/news/2020-06-politics-coronavirus.html?utm_s...
How governments control coronavirus data
Jun 6, 2020
Dr. Krishna Kumari Challa
How is a metal formed?
https://phys.org/news/2020-06-metal.html?utm_source=nwletter&ut...
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https://sciencex.com/news/2020-06-weve-deadly-bacteria-common-sugar...
Scientists have discovered how the deadly bacteria use a common sugar to spread through the body. It could help us stop them!
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https://phys.org/news/2020-06-bacteria-mass-suicide-defend-colony.h...
Bacteria perform mass suicide to defend their colony
Jun 6, 2020
Dr. Krishna Kumari Challa
https://theconversation.com/why-do-protests-turn-violent-its-not-ju...
Why do protests turn violent?
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https://theconversation.com/plates-cups-and-takeaway-containers-sha...
Plates, cups and takeaway containers shape what (and how) we eat
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Jun 6, 2020
Dr. Krishna Kumari Challa
Excited delirium: How debatable excuses can be used to defend some cases of police brutality
Excited (or agitated) delirium is characterized by agitation, aggression, acute distress and sudden death, often in the pre-hospital care setting. It is typically associated with the use of drugs that alter dopamine processing, hyperthermia, and, most notably, sometimes with death of the affected person in the custody of law enforcement. Subjects typically die from cardiopulmonary arrest, although the cause is debated. Unfortunately an adequate treatment plan has yet to be established, in part due to the fact that most patients die before hospital arrival. While there is still much to be discovered about the pathophysiology and treatment, it is hoped that this extensive review will provide both police and medical personnel with the information necessary to recognize and respond appropriately to excited delirium.
What is ‘excited delirium’?
Excited delirium is a controversial diagnosis, often used when people die in police custody.
Whether it actually exists is debated among experts and police forces alike, but people with excited delirium are said to be aggressive and incoherent, with “superhuman strength” imbued by their taking stimulant drugs such as cocaine.
Critics of the term have dismissed it as pseudo-science, a convenient excuse used to justify excessive police force
Critics argue that it’s not a legitimate cause of death, with police using it as an excuse when arrests involve avoidable deaths, and say the term is disproportionately cited in cases where black and Hispanic men die in custody.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3088378/#:~:text=3,une...
https://www.edinburghnews.scotsman.com/news/politics/what-excited-d...
Jun 6, 2020
Dr. Krishna Kumari Challa
Nobel prizewinners have different career patterns than peers
https://phys.org/news/2020-06-nobel-prizewinners-career-patterns-pe...
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https://www.sciencealert.com/70-of-those-infected-with-the-coronavi...
Preliminary Research Says 70% of Those Infected With Coronavirus Don't Pass It On
Japan's success stems from adherence to the "3 C's rule." The government told people to avoid closed spaces, crowded places, and close-contact settings – all of which are ripe for superspreading events.
Superspreader events, in which one person infects a disproportionately large number of others, are the primary means by which the coronavirus spreads, new preprint research suggests.
Jun 6, 2020
Dr. Krishna Kumari Challa
How long does the coronavirus last inside the body?
Researchers are narrowing down how long the virus persists inside the body and whether people can be quickly re-infected.
https://www.nationalgeographic.com/science/2020/06/how-long-does-co...
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https://www.quantamagazine.org/why-sleep-deprivation-kills-20200604/
Why Sleep Deprivation Kills
Going without sleep for too long kills animals. Newly published work suggests that the answer lies in an unexpected part of the body.
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$$ https://www.sciencealert.com/this-is-how-a-medical-study-gets-vette...
This Is How a Medical Study Gets Published in a Scientific Journal, And Why Most Don't
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https://theconversation.com/will-flu-or-cold-viruses-push-the-new-c...
Will flu or cold viruses push the new coronavirus out of circulation this winter?
--
https://theconversation.com/scientists-around-the-world-are-already...
Scientists around the world are already fighting the next pandemic
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Are viruses alive? Perhaps we’re asking the wrong question
https://theconversation.com/are-viruses-alive-perhaps-were-asking-t...
Jun 6, 2020
Dr. Krishna Kumari Challa
A Digital Locksmith Has Decoded Biology’s Molecular Keys
https://www.quantamagazine.org/new-machine-learning-system-decodes-...
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https://www.sciencealert.com/what-s-5g-and-why-are-people-so-scared...
What's 5G, And Why Are People So Scared of It? Here's What You Need to Know
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https://phys.org/news/2020-06-scientists-uncultivated-bacteria-arch...
Scientists propose new naming system for uncultivated bacteria and archaea
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https://medicalxpress.com/news/2020-06-philosophy-lab-vision-imposs...
'Philosophy lab test' finds objective vision impossible
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https://phys.org/news/2020-06-technique-individual-molecules-cellul...
New technique pinpoints locations of individual molecules in their cellular neighborhoods
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https://phys.org/news/2020-06-victoria-plate-africa-rotates.html?ut...
Why the Victoria Plate in Africa rotates
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https://blogs.scientificamerican.com/observations/which-experts-sho...
Which Experts Should You Listen to during the Pandemic?
It should be a no-brainer: your best bet is to follow those who have actual expertise $$
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https://www.sciencealert.com/physicists-think-they-ve-figured-out-a...
Physicists Think They've Figured Out a Way to Save Schrödinger's Cat
Jun 6, 2020
Dr. Krishna Kumari Challa
How to Stop People From Using Your Wi-Fi
Unauthorized access can slow network speeds and open major security risks
https://www.lifewire.com/detect-and-remove-wi-fi-freeloaders-from-y...
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https://network.febs.org/channels/665-research/videos/23389-exercis...
https://network.febs.org/channels/665-research/videos/23390-subcuta...
award winning sci-com videos
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https://theconversation.com/what-is-tear-gas-139958?utm_medium=emai...
What is tear gas?
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Mesmerizing Video Shows Swimming Feather Star
The marine invertebrate, is known as a living fossil
https://www.nationalgeographic.com/news/2016/12/swimming-feather-st...
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https://www.sciencealert.com/physicist-proposes-a-pretty-depressing...
Physicist Proposes a Pretty Depressing Explanation For Why We Never See Aliens
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https://techxplore.com/news/2020-06-kubeetle-s-insect-inspired-robo...
KUBeetle-S: An insect-inspired robot that can fly for up to 9 minutes
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https://theconversation.com/curious-kids-how-far-away-can-dogs-smel...
How far away can dogs smell and hear?
Jun 6, 2020
Dr. Krishna Kumari Challa
Despite the popularity of spicy cuisine among Homo sapiens, the hotness in chili peppers has always been something of an evolutionary mystery.
A plant creates fruit in order to entice animals to eat and disperse its seeds, so it doesn't make sense for that fruit to be painfully hot, said University of Florida zoology professor and evolutionary ecologist Douglas Levey.
But according to new research by Levey and six colleagues from other universities, chilies have a very good reason to make themselves hot. It boils down to protection.
Based on research on wild chili plants in rural Bolivia, the scientists found that the leading cause of seed mortality is a fungus called Fusarium. The fungus invades the fruits through wounds made by insects and destroys the seeds before they can be eaten and dispersed.
Capsaicin, the chemical that makes the peppers hot, drastically slows microbial growth and protects the fruit from Fusarium. And while capsaicin deters local mammals, such as foxes and raccoons, from consuming the chilies, birds don't have the physiological machinery to detect the spicy chemical and continue to eat the peppers and disperse seeds, Levey said.
The researchers' findings will be released today in a paper published online by the Proceedings of the National Academy of Sciences.
https://www.eurekalert.org/pub_releases/2008-08/uof-nrr081108.php#:...
Why chilli peppers are hot: Capsaicin, the chemical that makes the peppers hot, drastically slows microbial growth
Jun 6, 2020
Dr. Krishna Kumari Challa
Tear gas ....
https://theconversation.com/what-is-tear-gas-139958?utm_medium=emai...
The term tear gas refers to a group of chemical irritants that can be used to control or disperse crowds. The chemicals that are used for this purpose cause irritation of mucous membranes and of the eyes including tearing (hence the name “tear gas”), twitching around the eyes, cough, difficulty breathing and irritation to the skin.
They are believed to be short-term irritants and unlikely to kill or cause permanent harm, especially if delivered at relatively low levels, on a single occasion and in open spaces. At high levels in closed spaces, though, they can be lethal.
The chemicals are solids, not gasses, but may be delivered dispersed as aerosols in pyrotechnic mixtures that disperse the chemical during the explosion or in solutions delivered as a spray. There are multiple tear gas chemicals, the most likely of which is called 2-chlorobenzalmalonitrile or CS, which was named for Ben Corson and Roger Stoughton, American chemists who invented it in 1928. CS was adopted as the official military riot control chemical in 1959. There have been many instances of tear gas use around the world.
How does tear gas work?
These chemicals react with sensory nerve receptors that can cause pain and discomfort in skin, eyes and mucous membranes. They act almost instantly, but the irritation they induce is usually resolved in about 30 minutes to a....
Can tear gas cause permanent harm?
In low level and infrequent exposures, they are unlikely to cause permanent harm. They have been used for years by the military to train on gas mask use. There is some human evidence reported of long-term effects mainly from high dose exposures in indoor situations and for long time periods.
However, there is little human data on specific vulnerable populations.
Is tear gas a chemical weapon?
The 1993 International Chemical Weapons Convention, Geneva banned tear gas from being used where military forces are at war. However, a number of countries, including the U.S., have approved the use of tear gas for civilian riot control and for crowd control of non-military persons.
Jun 7, 2020
Dr. Krishna Kumari Challa
Magnet tricks
Science experiments
Jun 7, 2020
Dr. Krishna Kumari Challa
https://theconversation.com/glacier-mice-these-herds-of-moss-balls-...
Glacier mice: these herds of moss-balls roam the ice – and we’re uncovering their mysteries
Glacier mice don’t appear on just any ice sheet – there are only a few glaciers worldwide where they can be found. In 2012, we travelled to one called Falljökull to study their movements.
We dissected some of these moss balls and inserted accelerometers. These devices measure movement, and are used to orient mobile phones so that if you rotate them, their displays turns accordingly. The data we collected from accelerometers helped crack the puzzle of how moss in contact with the ice can survive when other plants would usually die.
The glacier mice rotated often, at least once every few days. It is this rotation that enables the glacier mice to grow moss around the whole of their outer surfaces – sometimes creating near perfect spheres. If the glacier mice stopped rotating, the moss that comes into permanent contact with the glacier surface would die.
Glacier mice are often found teetering on icy pedestals, and that’s because each of these moss balls actually reduces the amount of melting that occurs underneath it. So over a period of hours and days, the glacier mouse becomes elevated on a pedestal of ice and it eventually rolls off.
This process repeats itself over and over, so that the ball exposes a different surface to the sun each time it falls. In time, this means the moss ball rotates often and evenly enough to prevent any part staying in contact with the ice too long.
Recent research on glacier mice in Alaska found that glacier mice can live for more than six years in this pattern. But scientists still don’t know why groups of glacier mice tend to move herd-like on the ice surface, sometimes south, sometimes west, but always in concert with each other. Wind, gravity and melting patterns aren’t enough to fully explain the mystery, so research continues.
Jun 9, 2020
Dr. Krishna Kumari Challa
Bird mummy' mystery - solved
The intelligent parrot!
Jun 9, 2020
Dr. Krishna Kumari Challa
In a Fascinating Twist, Animals That Do Math Also Understand More Language Than We Think
https://www.sciencealert.com/some-animals-that-do-math-can-understa...
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https://www.sciencedaily.com/releases/2020/06/200608092932.htm
Ground-breaking research makes childhood vaccines safe in all temperatures
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https://phys.org/news/2020-06-scientists-lament-humpty-dumpty-effec...
Scientists lament 'Humpty Dumpty' effect on world's spectacular, rare wildlife
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https://medicalxpress.com/news/2020-06-flame-retardants.html?utm_so...
Study finds another reason to wash hands: Flame retardants
--
https://phys.org/news/2020-06-entire-roman-city-revealed.html?utm_s...
Entire Roman city revealed without any digging
--
https://phys.org/news/2020-06-parasitic-fungi-blue-green-algae.html...
Parasitic fungi keep harmful blue-green algae in check
--
https://phys.org/news/2020-06-heart-milky-stars-closer-threatening....
At the heart of the Milky Way, stars draw closer, threatening planets in their orbit
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https://theconversation.com/climate-explained-does-your-driving-spe...
Does your driving speed make any difference to your car’s emissions?
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Jun 9, 2020
Dr. Krishna Kumari Challa
Sci-com from women
https://news.ufl.edu/2020/06/women-in-science-media/
Sci-com : how scientists are answering Qs from kids
Jun 10, 2020
Dr. Krishna Kumari Challa
Reasons Why The Coronavirus Is Not ‘Man-made’ Controversial claims over the coronavirus’ origin have proliferated on the internet. Here, we examine the scientific evidence that supports its natural origins.
https://www.asianscientist.com/2020/06/features/coronavirus-origin-...
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https://blogs.scientificamerican.com/voices/we-are-never-just-scien...
We Are Never Just Scientists
The gender and racial gaps in scientific professions illustrate the need for greater inclusion at all levels
--
https://www.the-scientist.com/news-opinion/two-genetic-regions-link...
Two Genetic Regions Linked with Severe COVID-19
In a genome-wide association study, variants in both the ABO blood group locus and a cluster of genes on human chromosome 3 are more common among COVID-19 patients with respiratory failure than in the general population.
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https://phys.org/news/2020-06-ancient-micrometeoroids-specks-stardu...
Ancient micrometeoroids carried specks of stardust, water to asteroid 4 Vesta
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https://phys.org/news/2020-06-human-eggs-men-sperm.html?utm_source=...
Human eggs prefer some men's sperm over others, research shows
The egg does not always agree with the women's choice of partner.
Chemical signals from eggs facilitates cryptic female choice in humans, Proceedings of the Royal Society B, rspb.royalsocietypublishing.or … .1098/rspb.2020.0805
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https://medicalxpress.com/news/2020-06-widespread-facemask-covid-.h...
Widespread facemask use could shrink the 'R' number and prevent a second COVID-19 wave: study
The reproduction or 'R' number—the number of people an infected individual passes the virus onto—needs to stay below 1.0 for the pandemic to slow.
Jun 10, 2020
Dr. Krishna Kumari Challa
A rare heart bone is discovered in chimpanzees
Very few species of animals have this bone—called an os cordis—therefore this is a particularly rare find.
https://phys.org/news/2020-06-rare-heart-bone-chimpanzees.html?utm_...
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https://phys.org/news/2020-06-bike-human.html?utm_source=nwletter&a...
What a bike moving at near the speed of light might look like to a human observer
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https://phys.org/news/2020-06-erosion-himalayas-tectonic-movements-...
Erosion of the Himalayas governed by tectonic movements
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** https://phys.org/news/2020-06-women-travel-related-greenhouse-gas-e...
Women generate lower travel-related greenhouse gas emissions, study finds
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https://phys.org/news/2020-06-astrophysicists-cornerstone-einstein-...
Astrophysicists confirm cornerstone of Einstein's Theory of Relativity
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https://phys.org/news/2020-06-sun-clock-quantifies-extreme-space.ht...
New 'sun clock' quantifies extreme space weather switch on/off
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https://techxplore.com/news/2020-06-bogus-contact-apps-deployed.htm...
Bogus 'contact tracing' apps deployed to steal data: researchers
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https://techxplore.com/news/2020-06-scientists-neural-network-absor...
Scientists create a neural network for adaptive shock absorbers
Jun 11, 2020
Dr. Krishna Kumari Challa
After a century of searching, scientists find new liquid phase
https://phys.org/news/2020-06-century-scientists-liquid-phase.html?...
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https://phys.org/news/2020-06-ancient-enzymes-contribute-greener-ch...
Ancient enzymes can contribute to greener chemistry
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https://phys.org/news/2020-06-giant-jellyfish-deadly.html?utm_sourc...
What makes a giant jellyfish's sting deadly
The researchers used mass spectrometry to identify 13 toxin-like proteins in this lethal fraction. Some of the jellyfish proteins were similar to harmful enzymes and proteins found in poisonous snakes, spiders and bees. Instead of any one toxin being lethal, it's likely that multiple poisons work in concert to cause death, the researchers say.
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https://www.nature.com/articles/d41586-020-01721-x?utm_source=Natur...
Thousands of scientists worldwide went on strike for Black lives
Academics and scientific organizations stopped research activities on 10 June to reflect and take action on systemic inequalities in science.
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https://elifesciences.org/articles/58874?utm_source=content_alert&a...
Memory: How the brain constructs dreams
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https://theconversation.com/weight-loss-heres-why-those-last-few-po...
Weight loss: here’s why those last few pounds can be hardest to lose – according to science
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Jun 11, 2020
Dr. Krishna Kumari Challa
Females Gain Ground as Biomedical Research Subjects
A study finds improvement in the proportion of scientific projects that include both sexes, but analyzing results by sex is not routine.
https://www.the-scientist.com/news-opinion/females-gain-ground-as-b...
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https://phys.org/news/2020-06-human-embryo-like-stem-cells.html?utm...
Human embryo-like model created from human stem cells
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https://phys.org/news/2020-06-scientists-unexpected-widespread-eart...
Scientists detect unexpected widespread structures near Earth's core
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https://phys.org/news/2020-06-quantum-state-space.html?utm_source=n...
Quantum 'fifth state of matter' observed in space for first time
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https://medicalxpress.com/news/2020-06-reprogramming-immune-child-o...
Reprogramming of immune system cures child with often-fatal fungal infection $$
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https://phys.org/news/2020-06-skyrmions-biological-cells.html?utm_s...
Researchers discover skyrmions can split like biological cells
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https://phys.org/news/2020-06-factors-height-mountains.html?utm_sou...
Which factors control the height of mountains?
Which factors control the height of mountains?
A surprising answer: It is not erosion and weathering of rocks that determine the upper limit of mountain massifs, but rather an equilibrium of forces in the Earth's crust.
Jun 11, 2020
Dr. Krishna Kumari Challa
New insight into the Great Dying
New insight into the Great Dying: A new study shows for the first time that the collapse of terrestrial ecosystems during Earth's most deadly mass extinction event was directly responsible for disrupting ocean chemistry.
https://phys.org/news/2020-06-insight-great-dying.html?utm_source=n...
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https://phys.org/news/2020-06-pretty-pink-india-crater-lake.html?ut...
Pretty in pink: India crater lake changes colour overnight
A crater lake in India's western Maharashtra state has turned pink overnight, delighting nature enthusiasts and surprising experts who attributed it to changing salinity levels and the presence of algae in the water.
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https://techxplore.com/news/2020-06-drug-carrying-platelets-propel-...
Drug-carrying platelets engineered to propel themselves through biofluids
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https://techxplore.com/news/2020-06-twitter-limit-unread-articles.h...
Twitter moves to limit sharing on unread articles : aimed at slowing the spread of unverified information.
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https://techxplore.com/news/2020-06-aqua-fi-underwater-wifi-lasers....
Aqua-Fi: Underwater WiFi developed using LEDs and lasers
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https://techxplore.com/news/2020-06-beacons-safer-tunnel-evacuation...
Sound beacons support safer tunnel evacuation
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https://techxplore.com/news/2020-06-fraudulent-online-portals.html?...
How to handle fraudulent reviews on online portals? Study gives tips to managers
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https://www.sciencedaily.com/releases/2020/06/200610102721.htm
Study of 62 countries finds people react similarly to everyday situations
Jun 12, 2020
Dr. Krishna Kumari Challa
Tear gas:
Tear gas and pepper spray are chemical weapons. So, why can police use them?
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https://theconversation.com/what-is-tear-gas-139958
What is tear gas?
Jun 12, 2020
Dr. Krishna Kumari Challa
From chaos to free will
A crude understanding of physics sees determinism at work in the Universe. Luckily, molecular uncertainty ensures this isn’t so $$
https://aeon.co/essays/heres-why-so-many-physicists-are-wrong-about...
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https://www.ted.com/talks/elizabeth_cox_what_is_a_coronavirus
** What is a coronavirus?
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https://www.sciencenews.org/article/humans-cannot-hear-difference-b...
No, you can’t hear the difference between sick and healthy coughs
Humans can’t seem to pick up on subtle variations in the sounds
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https://phys.org/news/2020-06-physicists-publish-worldwide-consensu...
An international team of more than 170 physicists published the most reliable prediction so far for the theoretical value of the muon's anomalous magnetic moment
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https://phys.org/news/2020-06-ingredients-life-stellar-nurseries-st...
Ingredients for life appear in stellar nurseries long before stars are born
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https://phys.org/news/2020-06-adding-noise.html?utm_source=nwletter...
Adding noise for completely secure communication
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https://phys.org/news/2020-06-quantum-effect-large-metal.html?utm_s...
Quantum effect observed in 'large' metal
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https://phys.org/news/2020-06-remixed-mantle-early-plate-tectonics....
Remixed mantle suggests early start of plate tectonics
Jun 12, 2020
Dr. Krishna Kumari Challa
India's 50-year drying period and subsequent reversal—battle between natural and anthropogenic variability
https://phys.org/news/2020-06-india-year-period-subsequent-reversal...
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https://phys.org/news/2020-06-horizons-interstellar-parallax.html?u...
New Horizons conducts the first interstellar parallax experiment
New Horizons conducts the first interstellar parallax experiment .... For the first time, a spacecraft has sent back pictures of the sky from so far away that some stars appear to be in different positions than we'd see from Earth.
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https://phys.org/news/2020-06-bacteria-biological-reactions-sustain...
From bacteria to you: The biological reactions that sustain our rhythms
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https://phys.org/news/2020-06-enzyme-responsible-gender-based-pluma...
Single enzyme responsible for gender-based plumage color differences in canaries
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https://www.outlookindia.com/magazine/story/india-news-why-does-sci...
Why Does Science Come Last?
History shows us that there is no alternative to research in the battle against pandemics
Jun 13, 2020
Dr. Krishna Kumari Challa
Why children avoid the worst coronavirus complications might lie in their arteries
https://www.nature.com/articles/d41586-020-01692-z?utm_source=Natur...
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https://www.nature.com/articles/d41586-020-01684-z?utm_source=Natur...
The search for microbial dark matter
The Rolling, Lurching, Vomit-Inducing Road to a Seasickness Cure
Searching for a solution has its ups and downs.
--
https://massivesci.com/articles/retinal-waves-perception-developmen...
How does the developing brain learn to perceive the world before it can see it?
Our eyes work when we’re born, even though they’ve never been exposed to light
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https://blogs.scientificamerican.com/observations/bad-medicine-is-w...
Bad Medicine Is Worse Than No Medicine
History shows that advocating for a “cure” without evidence can be deadly—and it’s happening again
Jun 13, 2020
Dr. Krishna Kumari Challa
Why testing negative for coronavirus isn't a guarantee you don't have COVID-19
The timing of testing is critical. The amount of virus or viral load of the person being tested affects the test result. A low viral load, which can occur in the very early stage of the disease or during the recovery phase, could give a false negative result. Anyone with symptoms consistent with COVID should stay at home – period – even if their test is negative. "It's not that you don't have COVID; it's just that the test is not that reliable."
It could be negative because it's too early, it could be negative because it's too late, it could be negative because the test wasn't done properly. There are many, many reasons why the test could be negative.
https://www.cbc.ca/news/health/coronavirus-test-false-negative-1.56...
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Females in India at Higher Risk of Death from Coronavirus Than Males, Shows Study
Coronavirus is Killing More Men than Women. In India, it seems, It’s the Opposite!
Females in India at Higher Risk of Death from Coronavirus Than Males, Shows Study
https://www.news18.com/news/india/females-in-india-at-higher-risk-o...
https://www.news18.com/news/buzz/more-men-are-dying-from-covid-19-i...
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https://www.sciencealert.com/scientists-harness-plants-to-produce-e...
Scientists Say They've Figured Out How to Get Usable Energy From Plants: they have produced hydrogen from plants in a development that they hope could eventually lead to using vegetation to produce electricity.
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https://theconversation.com/the-next-once-a-century-pandemic-is-com...
The next once-a-century pandemic is coming sooner than you think – but COVID-19 can help us get ready
Jun 14, 2020
Dr. Krishna Kumari Challa
48,000-year-old arrowheads reveal early human innovation in the Sri Lankan rainforest
https://theconversation.com/48-000-year-old-arrowheads-reveal-early...
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https://www.sciencenews.org/article/scientists-want-build-noah-ark-...
Scientists propose to create the Microbiota Vault to preserve human microbiome collections that may one day be used to prevent disease.
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$$ https://wordonthegrapevine.co.uk/biodynamic-viticulture-pseudoscience/
https://www.vinography.com/2020/06/the-skeptics-guide-to-biodynamic...
The problem with biodynamics: myths, quacks and pseudoscience
https://en.wikipedia.org/wiki/Biodynamic_agriculture#:~:text=Biodyn...
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https://phys.org/news/2020-06-scientists-protein-cancer-regenerate-...
Scientists engineer one protein to fight cancer and regenerate neurons
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https://www.space.com/universe-standard-model-hubble-constant-new-m...
'Standard model' of cosmology called into question by new measurements
Jun 15, 2020
Dr. Krishna Kumari Challa
A quantum memory that operates at telecom wavelengths
https://phys.org/news/2020-06-quantum-memory-telecom-wavelengths.ht...
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https://phys.org/news/2020-06-intelligent-life-galaxy.html?utm_sour...
Research sheds new light on intelligent life existing across the galaxy
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https://medicalxpress.com/news/2020-06-artificial-synapse-cells.htm...
Researchers develop artificial synapse that works with living cells
--
https://phys.org/news/2020-06-tiny-sand-grains-trigger-massive.html...
Tiny sand grains trigger massive glacial surges
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https://phys.org/news/2020-06-newly-phenomenon-quantum-devices.html...
Newly observed phenomenon could lead to new quantum devices
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https://phys.org/news/2020-06-reveals-material-defects.html?utm_sou...
Research reveals how material defects influence melting process
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https://phys.org/news/2020-06-pulsars-bright-half-century-old-myste...
Why pulsars shine bright: A half-century-old mystery solved
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https://medicalxpress.com/news/2020-06-disrupted-circadian-rhythms-...
Disrupted circadian rhythms linked to later Parkinson's diagnoses
Jun 16, 2020
Dr. Krishna Kumari Challa
Spectacular bird's-eye view? Hummingbirds see diverse colors humans can only imagine
To find food, dazzle mates, escape predators and navigate diverse terrain, birds rely on their excellent color vision.
Humans are color-blind compared to birds and many other animals
Humans have three types of color-sensitive cones in their eyes—attuned to red, green and blue light—but birds have a fourth type, sensitive to ultraviolet light. "Not only does having a fourth color cone type extend the range of bird-visible colors into the UV, it potentially allows birds to perceive combination colors like ultraviolet+green and ultraviolet+red—but this has been hard to test.
To investigate how birds perceive their colorful world, a research team established a new field system for exploring bird color vision in a natural setting. Working at the Rocky Mountain Biological Laboratory (RMBL) in Gothic, Colorado, the researchers trained wild broad-tailed hummingbirds (Selasphorus platycercus) to participate in color vision experiments.
"Nonspectral" color combinations, which involve hues from widely separated parts of the color spectrum, as opposed to blends of neighboring colors like teal (blue-green) or yellow (green-red) were studied. For humans, purple is the clearest example of a nonspectral color. Technically, purple is not in the rainbow: it arises when our blue (short-wave) and red (long-wave) cones are stimulated, but not green (medium-wave) cones.
While humans have just one nonspectral color—purple, birds can theoretically see up to five: purple, ultraviolet+red, ultraviolet+green, ultraviolet+yellow and ultraviolet+purple.
The experiments revealed that hummingbirds can see a variety of nonspectral colors, including purple, ultraviolet+green, ultraviolet+red and ultraviolet+yellow. For example, hummingbirds readily distinguished ultraviolet+green from pure ultraviolet or pure green, and they discriminated between two different mixtures of ultraviolet+red light—one redder, one less so.
https://phys.org/news/2020-06-spectacular-bird-eye-view-hummingbird...
More information: Mary Caswell Stoddard el al., "Wild hummingbirds discriminate nonspectral colors," PNAS (2020). www.pnas.org/cgi/doi/10.1073/pnas.1919377117
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Jun 16, 2020
Dr. Krishna Kumari Challa
Researchers report that they successfully tapped into speech and music inside an apartment simply by focusing on a light bulb
In a paper published over the weekend, the researchers said all they needed were a telescope and a $400 optical sensor, which they used to measure barely perceptible light bulb vibrations triggered by either voices or music in the room.
Source: Light bulb vibrations yield eavesdropping data More information: Lamphone: Real-Time Passive Sound Recovery from Light Bulb Vibrations (PDF)
www.nassiben.com/lamphone
Jun 16, 2020
Dr. Krishna Kumari Challa
Probing dark matter with the Higgs boson
Visible matter—everything from pollen to stars and galaxies—accounts for roughly 15% of the total mass of the universe. The remaining 85% is made of something entirely different from things we can touch and see: dark matter. Despite overwhelming evidence from the observation of gravitational effects, the nature of dark matter and its composition remain unknown.
How can physicists study dark matter beyond gravitational effects if it is practically invisible? Researchers are pursuing three approaches:
Although successful at describing elementary particles and their interactions at low energies, the Standard Model of particle physics does not include a viable dark-matter particle. The only possible candidates, neutrinos, do not have the right properties to explain the observed dark matter. To remedy this problem, a simple theoretical extension of the Standard Model posits that existing particles, such as the Higgs boson, act as a "portal" between known particles and dark-matter particles. Since the Higgs boson couples to mass, massive dark-matter particles should interact with it. The Higgs boson still has large uncertainties associated with the strength of its interaction with Standard Model particles; up to 30% of the Higgs-boson decays can potentially be invisible, according to the latest ATLAS combined Higgs-boson measurements.
Could some of the Higgs bosons decay into dark matter? As dark matter does not interact directly with the ATLAS detector, physicists look for signs of "invisible particles," inferred through momentum conservation of the proton–proton collision products. According to the Standard Model, the fraction of Higgs bosons decaying to an invisible final state (four neutrinos!) accounts for just 0.1% and is thus negligible. Should such events be observed, it would be a direct indication of new physics and potential evidence of Higgs bosons decaying into dark-matter particles.
https://phys.org/news/2020-06-probing-dark-higgs-boson.html?utm_sou...
Search for invisible Higgs boson decays with vector boson fusion signatures with the ATLAS detector using an integrated luminosity of 139 fb−1: atlas.web.cern.ch/Atlas/GROUPS … ATLAS-CONF-2020-008/
Jun 16, 2020
Dr. Krishna Kumari Challa
Disclosure of climate-related financial risks not enough to drive action
While risk disclosure can support a market-driven transition towards a more sustainable financial system, it is only one part of the puzzle. To ensure its success the TCFD Framework should be updated to incorporate consideration of other crucial factors."
The study identified that in addition to disclosure, it is equally important to ensure the appropriate incentives to disclose, the mechanisms to enable market discipline and supply chain compliance.
https://phys.org/news/2020-06-disclosure-climate-related-financial-...
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Scientists discover three-dimensional structure in smaller water droplet
https://phys.org/news/2020-06-scientists-three-dimensional-smaller-...
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https://phys.org/news/2020-06-history-insightful-hiv-neutron-approa...
History of insightful HIV research inspires neutron scattering approach to studying COVID-19
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https://techxplore.com/news/2020-06-ai-algorithm-age-photos-wrinkle...
AI algorithm identifies age of faces in photos using wrinkles, spots
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The first programming language for quantum computers
https://techxplore.com/news/2020-06-intuitive-language-quantum.html
Jun 16, 2020
Dr. Krishna Kumari Challa
Why West Antarctica is warming faster than East Antarctica
A possible explanation for why West Antarctica is warming faster th...
Sang-Yoon Jun et al. The internal origin of the west-east asymmetry of Antarctic climate change, Science Advances (2020). DOI: 10.1126/sciadv.aaz1490
Jun 16, 2020
Dr. Krishna Kumari Challa
How insulin works to control your blood sugar
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Coronavirus: Under the microscope
Jun 16, 2020
Dr. Krishna Kumari Challa
New species extinction target proposed for global nature rescue plan
In proposals published today in the journal Science, conservation experts are suggesting a long-term goal to reduce species extinctions towards natural rates, with an easily measurable objective of fewer than 20 extinctions a year.
It would apply to all described species across the major taxonomic groups (fungi, plants, invertebrates and vertebrates) and ecosystem types, whether freshwater, marine or terrestrial.
https://phys.org/news/2020-06-species-extinction-global-nature.html...
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Measuring the spin of a black hole
https://phys.org/news/2020-06-black-hole.html
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https://phys.org/news/2020-06-young-embryos-quality.html?utm_source...
How young embryos conduct quality control to become healthy fetuses ...
The first few days of embryonic development are a critical point for determining the failure or success of a pregnancy. Because relatively few cells make up the embryo during this period, the health of each cell is vital to the health of the overall embryo. But often, these young cells have chromosomal aneuploidies—meaning, there are too many or too few chromosome copies in the cell. Aneuploid cells lead to the failure of the pregnancy, or cause developmental defects such as Down syndrome later in gestation.
Researchers have found that the prevalence of aneuploidy is drastically lower as the embryo grows and develops
aneuploid cells are under chronic stress due to an imbalance in the production of proteins caused by the abnormal number of chromosomes. This stress in turn activates a process called autophagy that leads to the death of the abnormal cells.
Shruti Singla et al. Autophagy-mediated apoptosis eliminates aneuploid cells in a mouse model of chromosome mosaicism, Nature Communications (2020). DOI: 10.1038/s41467-020-16796-3
Jun 16, 2020