ScienceDaily: Most Popular News


How to block new antibiotic resistance gene

Posted: 19 Feb 2019 02:01 PM PST

A new antimicrobial-resistance gene, VCC-1, a beta-lactamase gene, has been discovered in benign close relatives of virulent Vibrio cholerae, which causes cholera. Now, a team of Canadian researchers has found a way to block the VCC-1 enzyme, which disables that resistance gene.

Fluorescing urine signals organ transplant rejection, could replace needle biopsies

Posted: 19 Feb 2019 02:01 PM PST

Glowing urine may replace the biopsy needle: In detecting organ transplant rejection, a new nanoparticle has proven much faster and more thorough in the lab than a biopsy. When T cells mount their first attack on the organ's cells, the nanoparticle sends an alarm signal into the urine that makes it fluoresce.

Keep calm and don't carry on when parenting teens

Posted: 19 Feb 2019 02:01 PM PST

In a new study, psychologists find that mothers and fathers who are less capable of dampening down their anger are more likely to resort to harsh discipline aimed at their teens, and that fathers in particular were not as good at considering alternative explanations for their teens' behavior.

Antibiotic resistances spread faster than thought, aquaculture study reveals

Posted: 19 Feb 2019 02:01 PM PST

By studying fish raised in aquaculture, researchers have shed new light on the mechanisms by which antibiotic resistance genes are transferred between bacteria. According to their study, those mechanisms are more varied than previously thought.

American women have better control of high blood pressure but are more obese than men

Posted: 19 Feb 2019 02:01 PM PST

A study of more than 30,000 Americans since 2001 has revealed significant differences in management of heart disease risk between women and men.

T-cell receptor diversity may be key to treatment of follicular lymphoma, study finds

Posted: 19 Feb 2019 02:01 PM PST

Healthy T-cells play a crucial role in how the body fights follicular lymphoma, according to a new study. T-cells are a key part of the immune system and protect the body by fighting infections and cancer.

Cervical microbiome may promote high-grade precancerous lesions

Posted: 19 Feb 2019 02:01 PM PST

Infections with a Human Papillomavirus (HPV) cause 99 percent of cervical cancer cases, and the disease's first sign is often the appearance of precancerous lesions on a woman's cervix. But bacteria may play an important role, too. New research suggests that the cervical microbiome may influence HPV infection more than researchers previously thought.

Solar tadpole-like jets seen with NASA'S IRIS add new clue to age-old mystery

Posted: 19 Feb 2019 12:52 PM PST

Scientists have discovered tadpole-shaped jets coming out of the Sun that may help explain why the corona (the wispy upper atmosphere of our star) is so inexplicably hot.

Carbon taxes could create new winners and losers among countries, research says

Posted: 19 Feb 2019 12:52 PM PST

A global carbon tax would create new sets of economic winners and losers, with some countries holding a distinct competitive advantage over others, according to new research.

Prenatal forest fire exposure stunts children's growth

Posted: 19 Feb 2019 12:51 PM PST

Forest fires are more harmful than previously imagined, causing stunted growth in children who were exposed to smoke while in the womb, according to new research.

Engineers can detect ultra rare proteins in blood using a cellphone camera

Posted: 19 Feb 2019 11:35 AM PST

Commercial approaches to ultrasensitive protein detection are starting to become available, but they are based on expensive optics and fluid handlers, which make them relatively bulky and expensive. Knowing that having this sort of diagnostic system available as a point-of-care device would be critical for many conditions, especially traumatic brain injury, engineers have developed a test that uses off-the-shelf components and can detect single proteins with results in a matter of minutes.

In the blink of an eye: Team uses quantum of light to create new quantum simulator

Posted: 19 Feb 2019 11:35 AM PST

Imagine being stuck inside a maze and wanting to find your way out. How would you proceed? The answer is trial and error. This is how traditional computers with classical algorithms operate to find the solution to a complex problem. Now consider this: What if, by magic, you were able to clone yourself into multiple versions so that you were able to go through all the various paths at the same time? You'd find the exit almost instantly.

Brain's primitive sensory region also participates in sophisticated learning

Posted: 19 Feb 2019 11:35 AM PST

Neuroscientists have revealed that a simple brain region, known for processing basic sensory information, can also guide complex feats of mental activity. The new study involving mice demonstrated that cells in the somatosensory cortex, the brain area responsible for touch, also play a key role in reward learning. It is the basis for how we connect our work in the office to that paycheck, or that A+ to the studying we did in preparation for the test.

Pottery reveals America's first social media networks

Posted: 19 Feb 2019 11:35 AM PST

Long before Snapchat, Instagram, Facebook and even MySpace, early Mississippian Mound cultures in America's southern Appalachian Mountains shared artistic trends and technologies across regional networks that functioned in similar ways as modern social media, suggests new research.

New therapeutic approach to treating osteoarthritis

Posted: 19 Feb 2019 11:35 AM PST

Researchers have developed a new way to deliver treatment for cartilage regeneration.

When a defect might be beneficial

Posted: 19 Feb 2019 11:35 AM PST

Engineers have studied the structure and properties of the commonly occurring planar defects at the atomic scale, which spans only a few tenths of a nanometer.

New laser methods create dazzling colors on metals

Posted: 19 Feb 2019 10:30 AM PST

Researchers describe how to use a single commercially available laser to achieve three techniques for laser colorization on metal, making the techniques more practical for a wide range of applications in art and jewelry making.

Food allergies and multiple sclerosis: New link

Posted: 19 Feb 2019 10:30 AM PST

Investigating the correlation between allergy and inflammatory disease activity, a team of investigators has found new evidence connecting food allergies and relapses of multiple sclerosis.

Nanopores make portable mass spectrometer for peptides a reality

Posted: 19 Feb 2019 10:30 AM PST

Scientists have developed nanopores that can be used to directly measure the mass of peptides. Although the resolution needs to be improved, this proof of principle shows that a cheap and portable peptide mass spectrometer can be constructed using existing nanopore technology and the patented pores.

Micro-control of liver metabolism

Posted: 19 Feb 2019 10:29 AM PST

A new discovery has shed light on small RNAs called microRNAs in the liver that regulate fat and glucose metabolism. Research shows that a molecular anticipation, during fast to re-feed transition, is essential for capping glucose production by the liver. This novel control enables a rapid switch in physiology following food consumption. Besides the therapeutic potential, the findings show that these mechanisms may be associated with metabolic diseases and aging.

Firefly-inspired surfaces improve efficiency of LED lightbulbs

Posted: 19 Feb 2019 10:29 AM PST

A new type of light-emitting diode lightbulb could one day light homes and reduce power bills, according to researchers who suggest that LEDs made with firefly-mimicking structures could improve efficiency.

Marsupial lived among Arctic dinosaurs

Posted: 19 Feb 2019 10:29 AM PST

A research team has discovered a previously unknown species of marsupial that lived in Alaska's Arctic during the era of dinosaurs, adding a vivid new detail to a complex ancient landscape. The thumb-sized animal, named Unnuakomys hutchisoni, lived in the Arctic about 69 million years ago during the late Cretaceous Period.

Indecision under pressure

Posted: 19 Feb 2019 10:29 AM PST

When compressed, a material typically becomes a better conductor of heat. Not so for the unusual material cubic boron arsenide, which when under pressure shows its conductivity first improves and then deteriorates. The findings not only hint at future applications, but proffer a theory that may offer insights into some of the oldest Earth processes.

Altered brain activity patterns of Parkinson's captured in mice

Posted: 19 Feb 2019 10:29 AM PST

Researchers pinpoint how brain activity changes in mouse models of Parkinson's disease, hinting at what may drive symptoms in humans.

Can a flowing liquid-like material maintain its structural order like crystals?

Posted: 19 Feb 2019 10:29 AM PST

Scientists have discovered a chiral compound, which can spontaneously form a molecular assembly with an extremely large single domain structure beyond a size regime incapable of realizing with usual molecular self-assembly. The chiral compound, when heated and left to cool on a solid substrate, gives a droplet featuring a single-crystal-like structure. When the substrate is set up vertically, the droplet exhibits sliding and rotating motion controlled by the chirality while preserving the single-crystalline structural order.

Scientists create new map of brain's immune system

Posted: 19 Feb 2019 10:28 AM PST

A team of researchers under the direction of the Medical Center -- University of Freiburg has created an entirely new map of the brain's own immune system in humans and mice.

New technology captures movement of quantum particles with unprecedented resolution

Posted: 19 Feb 2019 10:27 AM PST

A new study explores the activity of quantum particles in 2D materials within an unprecedented small time frame and at an extraordinarily high spatial resolution. These are highly sought-after capabilities for advanced communications technologies and for photonics-based quantum computers.

Dose of vitamin C helps gold nanowires grow

Posted: 19 Feb 2019 10:27 AM PST

Scientists discover a method to turn stubby gold nanorods into gold nanowires of impressive length. The metal wires could be valuable for sensing, diagnostic, imaging and therapeutic applications.

Breakthrough in the search for graphene-based electronics

Posted: 19 Feb 2019 10:27 AM PST

A team of researchers from Denmark has solved one of the biggest challenges in making effective nanoelectronics based on graphene.

Renewable energy generation with kites and drones

Posted: 19 Feb 2019 10:27 AM PST

A group of researchers has recently developed a new software aimed at the analysis of energy generation systems based on kites and drones. They used the software to study the behavior of these systems while transforming the kinetic energy of the wind into useful electrical energy.

Plants can skip the middlemen to directly recognize disease-causing fungi

Posted: 19 Feb 2019 10:26 AM PST

Scientists have revealed that direct physical associations between plant immune proteins and fungal molecules are widespread during attempted infection. The authors' findings run counter to current thinking and may have important implications for engineering disease resistance in crop species.

Using crystals to unpick how viruses work

Posted: 19 Feb 2019 10:26 AM PST

Researchers have used X-ray crystallography and computer simulation to get a closer look at how viruses bind cells and cause infection.

Robots track moving objects with unprecedented precision

Posted: 19 Feb 2019 10:26 AM PST

A novel system uses RFID tags to help robots home in on moving objects with unprecedented speed and accuracy. The system could enable greater collaboration and precision by robots working on packaging and assembly, and by swarms of drones carrying out search-and-rescue missions.

Lobster's underbelly is as tough as industrial rubber

Posted: 19 Feb 2019 10:26 AM PST

Flip a lobster on its back, and you'll see that the underside of its tail is split in segments connected by a translucent membrane that appears rather vulnerable when compared with the armor-like carapace that shields the rest of the crustacean. But engineers have found that this soft membrane is surprisingly tough, with a microscopic, layered, plywood-like structure that makes it remarkably tolerant to scrapes and cuts.

New model mimics persistent interneuron loss seen in prematurity

Posted: 19 Feb 2019 10:17 AM PST

Research-clinicians created a novel preclinical model that mimics the persistent interneuron loss seen in preterm human infants, identifying interneuron subtypes that could become future therapeutic targets to prevent or lessen neurodevelopmental risks.

Fishing and pollution regulations don't help corals cope with climate change

Posted: 19 Feb 2019 08:18 AM PST

A new study reports that protecting coral reefs from fishing and pollution does not help coral populations cope with climate change. The study also concludes that ocean warming is the primary cause of the global decline of reef-building corals and that the only effective solution is to immediately and drastically reduce greenhouse gas emissions.

Why North Carolinian boats are fishing off New Jersey's coast, and how a CSF might help

Posted: 19 Feb 2019 08:18 AM PST

By studying the logbooks of fishing boats, researchers found that some fishing boats travel more than 250 miles to catch the fish that used to be in local waters. In response, researchers began investigating how local community supported fishery programs -- like farm shares for fish -- can affect fishing communities. That resulted in the creation of Fishadelphia, a CSF based in a South Philadelphia charter school.

CRISPR/Cas9 therapy can suppress aging, enhance health and extend life span in mice

Posted: 19 Feb 2019 08:17 AM PST

Researchers have developed a new gene therapy to help decelerate the aging process. The findings highlight a novel CRISPR/Cas9 genome-editing therapy that can suppress the accelerated aging observed in mice with Hutchinson-Gilford progeria syndrome, a rare genetic disorder that also afflicts humans.

The key to increased lifespan? Rubicon alters autophagy in animals during aging

Posted: 19 Feb 2019 08:17 AM PST

Autophagy is an important biological recycling mechanism that influences the progression of aging in animals. Here, age-related changes in autophagy were studied in multiple model organisms. A team found that Rubicon suppression led to reduction of age-associated motor decline, as well as reduction of fibrosis, and that Rubicon could be an important new target for treatments designed to reduce the effects of aging in humans.

A lack of antibody diversity may make the elderly more susceptible to the flu

Posted: 19 Feb 2019 08:17 AM PST

The influenza vaccine may be less effective in the elderly because their B cells are less capable of producing antibodies that can adapt to protect against new viral strains, researchers report. With age, B cells and the antibodies they secrete acquire fewer mutations that would provide flexible protection against the ever-changing flu virus.

No evidence tougher policies deter adolescent cannabis use

Posted: 19 Feb 2019 08:17 AM PST

A new study has found no evidence that teenage cannabis use is lower in countries with tougher policies.

Birch pollen allergen immunotherapy normalizes nasal gene-expression and microbial community

Posted: 19 Feb 2019 08:17 AM PST

According to a new study, birch pollen allergen immunotherapy modifies the gene expression and microbiome profile of the nasal epithelium to correspond to those of healthy controls.

Ocean acidification harms cod larvae more than previously thought

Posted: 19 Feb 2019 08:17 AM PST

The Atlantic cod is one of the most important commercial fish species in the world. Recent studies have shown that ocean acidification threatens the early life stages of this species. So far it was hoped that at least the larvae that survive might be more robust and therefore may aid in the adaptation of this population. A new article suggests otherwise.

20-million-year-old tusked sea cow is Central America's oldest marine mammal

Posted: 19 Feb 2019 08:17 AM PST

A researcher searching the shoreline of the Panama Canal for fossil plants instead found an ancient sea cow. An 'emergency fossil excavation' due to rising water levels yielded a remarkably complete skeleton of a new genus and species of dugong, estimated to be about 20 million years old, the first evidence of a marine mammal from the Pacific side of the canal.

The global impact of coal power

Posted: 19 Feb 2019 08:17 AM PST

With data and modelling from almost 8,000 coal power plants, researchers present the most comprehensive global picture to date of climate and human health impacts from coal power generation.

Forest fires as an opportunity for ecosystem recovery

Posted: 19 Feb 2019 08:17 AM PST

It is estimated that globally there are more than two million hectares of land in need of restoration. The fires that occurred in those places provided the people who manage them with an opportunity to change, via a suitable process of ecological restoration, the previous bad forestry practices.

Neanderthals' main food source was definitely meat

Posted: 19 Feb 2019 08:17 AM PST

Researchers describe two late Neanderthals with exceptionally high nitrogen isotope ratios, which would traditionally be interpreted as the signature of freshwater fish consumption. By studying the isotope ratios of single amino acids, they however demonstrated that instead of fish, the adult Neanderthal had a diet relying on large herbivore mammals and that the other Neanderthal was a breastfeeding baby whose mother was also a carnivore.

Total synthesis of marine antitumor agents trabectedin and lurbinectedin

Posted: 19 Feb 2019 08:16 AM PST

With its vast numbers of different lifeforms, the sea is a largely unexplored source of natural products that could be starting points for new pharmaceuticals, such as the antitumor drugs trabectedin and lurbinectedin. Because only tiny amounts can be obtained from sea organisms, synthetic production is necessary. Scientists have introduced a new, efficient synthetic route for these two drugs. A key step is the light-controlled activation of a carbon-hydrogen bond.

Confirming a source of the process behind auroras and the formation of stars

Posted: 19 Feb 2019 08:16 AM PST

Feature describes the first fully kinetic model of plasma particles showing that fast reconnection can indeed occur in partially ionized plasma.

Catch me if you can: Study reveals disguises are surprisingly effective

Posted: 19 Feb 2019 08:16 AM PST

Disguises reduced the ability of participants to match faces by around 30 percent, even when they were warned that some of the people had changed the way they look.

Natural resources valued differently by men and woman

Posted: 19 Feb 2019 08:16 AM PST

Men and women value, access and use resources from the natural environment in distinct and different ways, a new study has shown.

Children with autism, co-occurring ADHD symptoms lag in key measures of independence

Posted: 19 Feb 2019 06:16 AM PST

A pair of new studies has provided new insight into the challenges faced by children on the autism spectrum who exhibit symptoms of attention deficit/hyperactivity disorder (ADHD). According to the findings, these children have difficulty with adaptive behavior, a key measure of independence.

Oral antifungal drug used to treat yeast infections linked to higher rates of miscarriage

Posted: 19 Feb 2019 05:07 AM PST

A commonly used medication, fluconazole, used to treat vaginal yeast infections, is linked to higher rates of miscarriage if used during pregnancy, found new research.

Adolescent female blood donors at risk for iron deficiency and associated anemia

Posted: 19 Feb 2019 05:07 AM PST

Female adolescent blood donors are more likely to have low iron stores and iron deficiency anemia than adult female blood donors and nondonors, which could have significant negative consequences on their developing brains, a new study suggests.

Spherical display brings virtual collaboration closer to reality

Posted: 19 Feb 2019 05:07 AM PST

Virtual reality can often make a user feel isolated from the world, with only computer-generated characters for company. But researchers think they may have found a way to encourage a more sociable virtual reality.

Climate-friendly labriculture depends on an energy revolution

Posted: 19 Feb 2019 05:07 AM PST

In a first-of-its-kind study, the climate-change impact of several production methods for lab-grown and farmed beef was assessed accounting for the differing greenhouse gases produced. The new projections reveal that over the long term, cultured meat production methods requiring large energy inputs could increase global warming more than some types of cattle farming if energy systems remain dependent on fossil fuels.

Quarrying of Stonehenge 'bluestones' dated to 3000 BC

Posted: 19 Feb 2019 05:07 AM PST

Excavations at two quarries in Wales, known to be the source of the Stonehenge 'bluestones', provide new evidence of megalith quarrying 5,000 years ago.

Terahertz wireless makes big strides in paving the way to technological singularity

Posted: 18 Feb 2019 07:17 PM PST

Scientists have announced the successful development of a terahertz (THz) transceiver that can transmit or receive digital data at 80 gigabits per second (Gbit/s). The transceiver was implemented using silicon CMOS integrated circuit technology, which would have a great advantage for volume production.