الثلاثاء، 20 ديسمبر 2016

ScienceDaily: Top News

ScienceDaily: Top News


Nutrition data review shows red meat has neutral effect on cardiovascular disease risk factors

Posted: 19 Dec 2016 05:20 PM PST

Consuming red meat in amounts above what is typically recommended does not affect short-term cardiovascular disease risk factors, such as blood pressure and blood cholesterol, according to a new review.

Oral vaccine against Salmonella developed

Posted: 19 Dec 2016 05:20 PM PST

A vaccine against salmonella poisoning, designed to be taken by mouth, has now been developed by researchers.

Cool image: Adding color to the gray world of electron microscopy

Posted: 19 Dec 2016 01:18 PM PST

While it may look like a pine wreath dotted with crimson berries, this holiday-themed image is in fact one of the world's first color electron micrographs.

Investing in fisheries management improves fish populations

Posted: 19 Dec 2016 01:16 PM PST

Successful fisheries management can be best achieved by implementing and enforcing science-based catch or effort limits, research shows.

How bacteria survive antibiotic treatment

Posted: 19 Dec 2016 01:16 PM PST

Multiresistant bacteria scientists around the world are working hard to win the battle against multi-resistant bacteria. A new publication now presents how even sensitive bacteria often manage to survive antibiotic treatment as so-called 'persister cells.' The comprehensive perspective on this phenomenon may help to improve current options of drug treatment and could even inspire the discovery of novel antibiotics targeting these notoriously difficult-to-treat persister bacteria.

Mimicking biological movements with soft robots

Posted: 19 Dec 2016 01:16 PM PST

Designing a soft robot to move organically -- to bend like a finger or twist like a wrist -- has always been a process of trial and error. Now, researchers have developed a method to automatically design soft actuators based on the desired movement.

Alzheimer's advance: Early stage study in mice show new drugs restore memory loss and prolong life

Posted: 19 Dec 2016 01:16 PM PST

Breakthrough findings demonstrate a possible target and potential drug treatment to restore memory loss and extend life span in mice with neurodegeneration.

The Deepwater Horizon aftermath

Posted: 19 Dec 2016 01:15 PM PST

Researchers have analyzed 125 compounds from oil spilled in the Gulf of Mexico to determine their longevity at different contamination.

Researchers develop first chikungunya vaccine from virus that does not affect people

Posted: 19 Dec 2016 01:15 PM PST

Researchers have developed the first vaccine for chikungunya fever made from an insect-specific virus that doesn't have any effect on people, making the vaccine safe and effective. The newly developed vaccine quickly produces a strong immune defense and completely protects mice and nonhuman primates from disease when exposed to the chikungunya virus.

Nanoparticle-based method shows promise in DNA vaccine delivery

Posted: 19 Dec 2016 12:19 PM PST

Researchers have developed a novel method for delivering therapeutic molecules into cells. The method harnesses gold nanoparticles that are electrically activated, causing them to oscillate and bore holes in cells' outer membranes and allowing key molecules -- such as DNA, RNA, and proteins -- to gain entry.

Ultra-thin solution to primary obstacle in solid-state battery development

Posted: 19 Dec 2016 12:18 PM PST

Researchers have announced a transformative development in the race to produce batteries that are at once safe, powerful, and affordable.

Culture not a factor in management styles globally

Posted: 19 Dec 2016 12:18 PM PST

One theory argues that 50 percent of managers' differences in their reactions to various situations are explained by cultural differences. Now, a new study has determined that culture plays little or no part in leaders' management of their employees. This finding could impact how managers are trained and evaluated globally.

Researchers caution parents to prevent electrical cord burns to the mouth

Posted: 19 Dec 2016 12:18 PM PST

With millions of Americans decorating their homes for the holidays, tangles of extension cords and electrical wires are a common sight. Researchers have estimated more than 1,000 injuries in children caused by oral electrical burns were reported in emergency rooms from 1997 to 2012. The researchers caution parents and caregivers of young children to be mindful of the dangers of electrical burns to the mouth.

Researchers estimate 10,000 metric tons of plastic enter Great Lakes every year

Posted: 19 Dec 2016 12:17 PM PST

A new study that inventories and tracks high concentrations of plastic in the Great Lakes could help inform cleanup efforts and target pollution prevention. Researchers found that nearly 10,000 metric tons -- or 22 million pounds -- of plastic debris enter the Great Lakes every year from the United States and Canada.

First use of graphene to detect cancer cells

Posted: 19 Dec 2016 12:17 PM PST

By interfacing brain cells onto graphene, researchers have shown they can differentiate a single hyperactive cancerous cell from a normal cell, pointing the way to developing a simple, noninvasive tool for early cancer diagnosis.

Freezing in record lows? You may doubt global warming

Posted: 19 Dec 2016 12:17 PM PST

Researchers from Utah State University, Boston University, The George Washington University and the University of Oxford report findings from analysis of experiential basis for skepticism about climate change in the United States.

El Niño fueled Zika outbreak, new study suggests

Posted: 19 Dec 2016 12:17 PM PST

A change in weather patterns, brought on by the 'Godzilla' El Niño of 2015, fueled the Zika outbreak in South America, researchers report.

Newly discovered 'Casper' octopod at risk from deep-sea mining

Posted: 19 Dec 2016 10:45 AM PST

Last spring, researchers made headlines with the discovery of what was surely a new species of octopod, crawling along the seafloor at a record-breaking ocean depth of more than 4,000 meters off of Hawaii. Now, a report reveals that these ghost-like, deep-sea octopods lay their eggs on the dead stalks of sponges attached to seafloor nodules rich in the increasingly valuable metals used in cell phones and computers.

Starfish larvae create complex water whorls to eat and run

Posted: 19 Dec 2016 10:45 AM PST

Tiny starfish larvae employ a complex and previously unknown survival mechanism involving whorls of water that either bring food to them or speed them away to better feeding grounds.

Earliest evidence discovered of plants cooked in ancient pottery

Posted: 19 Dec 2016 10:44 AM PST

Scientists have uncovered the earliest direct evidence of humans processing plants for food found anywhere in the world. Researchers studied unglazed pottery dating from more than 10,000 years ago, from two sites in the Libyan Sahara.

Satellites help discover a jet stream in the Earth's core

Posted: 19 Dec 2016 10:44 AM PST

A jet stream within the Earth's molten iron core has been discovered by scientists using the latest satellite data that helps create an 'X-ray' view of the planet.

New leaf study sheds light on 'shady' past

Posted: 19 Dec 2016 10:44 AM PST

A new study highlights a literally shady practice in plant science that has in some cases underestimated plants' rate of growth and photosynthesis, among other traits.

Tortoise electrons trying to catch up with hare photons give graphene its conductivity

Posted: 19 Dec 2016 10:44 AM PST

How electrons interact with other electrons at quantum scale in graphene affects how quickly they travel in the material, leading to its high conductivity. Now, researchers have developed a model attributing the greater conductivity in graphene to the accelerating effect of electrons interacting with photons under a weak magnetic field.

Important element of immune defense against fungal infections discovered

Posted: 19 Dec 2016 10:44 AM PST

Fungal infections are a serious health risk. They can be harmful especially to patients whose immune system is compromised through illness or chemotherapy. Scientists have discovered an important mechanism in the body's defenses against fungi. The discovery explains, among other things, why people with certain genetic variations are more susceptible to fungal infections.

'Tiny earthquakes' help scientists predict mountain rock falls

Posted: 19 Dec 2016 10:44 AM PST

Scientists have developed a new way to predict when mountain rock falls will happen -- in regions where people go skiing and climbing. The technique involves detecting tiny earthquakes which cause cracks in the mountain rock.

An invisible electrode

Posted: 19 Dec 2016 10:44 AM PST

A flexible transparent conductor free of reflection and scattering has been developed by researchers.

Movement of rainforest butterflies restricted by oil palm plantations

Posted: 19 Dec 2016 10:44 AM PST

Scientists have found that oil palm plantations, which produce oil for commercial use in cooking, food products, and cosmetics, may act as a barrier to the movement of butterflies across tropical landscapes.

Studies of one of the world's rarest birds, the Rufous-headed Robin

Posted: 19 Dec 2016 10:44 AM PST

Researchers have put together all known information about the endangered Rufous-headed Robin. Very few observations have been made since it was first discovered in 1905, but these researchers suggest that its distribution might be larger than previously thought.

Fuel cells with PFIA-membranes

Posted: 19 Dec 2016 10:44 AM PST

Scientists are exploring water management in an alternative proton exchange membrane type, called PFIA. The experiments have been conducted using the infrared facilities of BESSY II synchrotron to reveal how water is retained even at dry conditions in PFIA. The observations explain why PFIA membranes are superior to the widely used NAFIONTM membranes at higher temperatures and low humidity.

Bisphenol A in canned dog food may increase BPA concentrations in pets

Posted: 19 Dec 2016 10:44 AM PST

Bisphenol A (BPA) is a widely used industrial chemical found in many household items, including resins used to line metal storage containers, such as food cans. Now, researchers have found that short-term feeding of canned dog food resulted in a significant increase of BPA in dogs. Scientists believe that because of shared environments, dog exposure to BPA through canned foods could have human health implications.

Why exposure to rhythmic stimulation at certain frequencies facilitate epileptic seizures

Posted: 19 Dec 2016 10:44 AM PST

New research proposes an explanation for the occurrence of epileptic seizures as a result of the exposure to certain stimuli.

Rudolph's antlers inspire next generation of unbreakable materials

Posted: 19 Dec 2016 10:44 AM PST

Scientists have discovered the secret behind the toughness of deer antlers and how they can resist breaking during fights.

Satellites observe 'traffic jams' in Antarctic Ice Stream caused by tides

Posted: 19 Dec 2016 10:44 AM PST

Nine months of continual radar observation reveals the complex changing patterns of ice stream movement in three dimensions that can inform predictions for the speed at which the ice caps will respond to a warming climate.

Long-term anti-inflammatory drug use may increase cancer-related deaths for certain patients

Posted: 19 Dec 2016 10:44 AM PST

Regular use of over-the-counter non-steroidal inflammatory drugs (NSAIDs) such as aspirin and ibuprofen is associated with an increased risk of dying in patients diagnosed with Type 1 endometrial cancers, according to a new population-based study.

New prehistoric bird species discovered

Posted: 19 Dec 2016 10:43 AM PST

A new species of bird has been discovered in the Canadian Arctic. At approximately 90 million years old, the bird fossils are among the oldest avian records found in the northernmost latitude, and offer further evidence of an intense warming event during the late Cretaceous period.

With eyes or noses? How young children use sensory cues to make social decisions

Posted: 19 Dec 2016 10:38 AM PST

Children begin using olfactory information to help guide their responses to emotionally-expressive faces at about age five, research shows. These findings advance understanding of how children integrate different types of sensory information to direct their social behavior.

DNA markers distinguish between harmless, deadly bacteria

Posted: 19 Dec 2016 10:38 AM PST

Through a new study of the coccobacillus Francisella, researchers are working to use DNA markers to discern related but relatively harmless species as they are identified and to provide a means to distinguish them from the harmful F. tularensis.

Astronomers release largest digital survey of the visible universe

Posted: 19 Dec 2016 09:02 AM PST

The world's largest digital survey of the visible Universe, mapping billions of stars and galaxies, has been publicly released.

New technology coordinates drones in team missions

Posted: 19 Dec 2016 09:02 AM PST

A mathematics researcher has developed an algorithm to mobilize unmanned aerial vehicles (UAVs) in team missions. The new technology allows a team of UAVs to fly autonomously to complete complex coordinated missions.

New stem cell delivery approach regenerates dental pulp-like tissue in a rodent model

Posted: 19 Dec 2016 09:01 AM PST

Delivery of stem cells to damaged tooth roots using a collagen-derived biomaterial is effective at regenerating dental pulp-like tissue and shows promise as a potential therapy for restoring natural tooth function in a rodent model.

Powerful defenders of the brain discovered, with big implications for disease and injury

Posted: 19 Dec 2016 09:01 AM PST

A rare and potent type of immune cell has been discovered around the brain, suggesting the cells may play a critical role in battling Alzheimer's, multiple sclerosis and other diseases. By harnessing the cells' power, doctors may be able to develop new treatments for disease, traumatic brain injury and spinal cord injuries -- even migraines.

Barramundi populations at risk from acid oceans

Posted: 19 Dec 2016 08:56 AM PST

Wild barramundi populations are likely to be at risk under ocean acidification, a new study has found. The study is the first to show that even freshwater fish, which only spend a small portion of their lifecycle in the ocean, are likely to be seriously affected under the higher carbon dioxide levels expected at the end of the century.

Ancient Chinese malaria remedy fights TB

Posted: 19 Dec 2016 08:55 AM PST

A centuries-old herbal medicine, discovered by Chinese scientists and used to effectively treat malaria, has been found to potentially aid in the treatment of tuberculosis and may slow the evolution of drug resistance.

Discoveries from largest genome-wide study of chronic liver disease

Posted: 19 Dec 2016 08:55 AM PST

A study of unprecedented scale has led researchers to identify four previously unknown genetic risk locations for primary sclerosing cholangitis, a liver disease that lacks effective medical therapy. A new article highlights the undertaking, which is the largest genome-wide association study of primary sclerosing cholangitis to date and a step toward providing breakthrough treatments for the unmet needs of primary sclerosing cholangitis patients.

ALPHA experiment observes the light spectrum of antimatter for the first time

Posted: 19 Dec 2016 08:53 AM PST

Scientists report the first ever measurement on the optical spectrum of an antimatter atom. This achievement features technological developments that open up a completely new era in high-precision antimatter research.

Studies refute hypothesis on what caused abrupt climate change thousands of years ago

Posted: 19 Dec 2016 08:53 AM PST

Two new studies refute the hypothesis that one or more comets/bolides struck North America approximately 12,900 years ago triggering rapid climate change and the start of the Younger Dryas period.

Pregnancy leads to changes in the mother's brain

Posted: 19 Dec 2016 08:52 AM PST

A new study is the first to reveal how pregnancy causes long-lasting alterations in brain structure, probably related to improving the mother's ability to protect and interact with the child.

Genetic biomarker IDs patients with increased risk for heart damage by anthracycline chemo

Posted: 19 Dec 2016 05:57 AM PST

Among women with breast cancer who received a type of chemotherapy called an anthracycline, those who had a certain genetic biomarker had a significantly increased risk for having anthracycline-induced congestive heart failure.

Tumor DNA in blood may serve as prognostic marker of pancreatic cancer

Posted: 19 Dec 2016 05:57 AM PST

The presence of circulating tumor DNA (ctDNA) isolated from blood samples of patients with pancreatic adenocarcinoma was associated with poor outcomes, report investigators.

Above and beyond megathrusts: Draining pore-fluids dampens tremors

Posted: 19 Dec 2016 05:57 AM PST

While metamorphic reactions in the subducting slab liberate large amounts of fluids, low-frequency earthquakes (LFE) largely occur beneath impermeable unmetamorphosed overlying plate, and are rare beneath metamorphosed plate. Scientists suggest that undrained conditions are a key factor in the generation of LFEs, whereas well-drained conditions reduce pore-fluid pressures at the megathrust and inhibit LFEs and associated tremors.

Newly identified pathway in mitochondria fuels tumor progression across cancer types

Posted: 19 Dec 2016 05:57 AM PST

Scientists have identified a novel protein pathway across several types of cancer that controls how tumor cells acquire the energy necessary for movement, invasion and metastasis. This protein pathway was previously only observed in neurons and represents a potential therapeutic target for several types of cancer.

Cardiac imaging detects serious residual septal defects during child open heart surgery

Posted: 19 Dec 2016 05:57 AM PST

Using cardiac imaging during heart surgery can detect serious residual holes in the heart that may occur when surgeons repair a child's heart defect, and offers surgeons the opportunity to close those holes during the same operation. Pediatric cardiology experts say using this tool, called transesophageal echocardiography, during surgery may improve outcomes for children with congenital heart disease.

Poll: Some parents forgo car seats, other safety measures while traveling

Posted: 19 Dec 2016 05:54 AM PST

But what some parents may not plan for ahead of vacation: accidental poisoning risks, gun safety and Uber rides.

Noise sensitivity traced to changes in brain functions

Posted: 19 Dec 2016 05:50 AM PST

The degree to which one is disturbed by noises of everyday life may be related to how the brain processes variations in the sound stream, according to new findings.

Electrifying news: Nano-modified aerospace composites

Posted: 19 Dec 2016 05:50 AM PST

New composite technology will see enhanced electrical and thermal conductivity of conventional composite materials that has previously been lacking, say scientists. Novel functionality including sensors, energy harvesting lighting and communication antennae will now be integrated into the structure of the composite material. The new technology will have wide-reaching benefits in the aerospace industry, they say.

No trace of dark matter in gamma-ray background

Posted: 19 Dec 2016 05:50 AM PST

Researchers have just published the most precise analysis of the fluctuations in the gamma-ray background to date. By making use of more than six years of data, the researchers found two different source classes contributing to the gamma-ray background. No traces of a contribution of dark matter particles were found in the analysis.

Weight loss surgery linked to gastrointestinal complaints

Posted: 19 Dec 2016 05:46 AM PST

Laparoscopic gastric bypass is an effective treatment for obesity, but a new study finds that patients who undergo the surgery often complain of gastrointestinal problems. The study included 249 obese patients who underwent the surgery and 295 obese controls, all of whom completed a questionnaire. Surgical patients completed the questionnaire two years after surgery. Surgical patients often experienced indigestion. Also, food intolerance, especially for food with a high fat or sugar content and for red meat, was a common side-effect of the surgery: food intolerance for specific products was reported by 70.7 per cent of postoperative patients compared with 16.9 percent of controls.

Ultrasound detects heart dysfunction after successful repair of aortic narrowing

Posted: 19 Dec 2016 05:46 AM PST

New echocardiographic ultrasound methods can non-invasively evaluate deformation of the heart muscle in order to identify abnormal function in children who were operated for coarctation (narrowing) of the aorta. Surgical intervention in infants is a worldwide and often vital procedure, but new research reveals that echocardiography post-surgery can and should be used to detect early and asymptomatic heart dysfunction.

Surgical ablation found to be effective in reducing atrial fibrillation and improving quality of life

Posted: 19 Dec 2016 05:46 AM PST

New clinical practice guidelines include major recommendations for the use of surgical ablation when treating atrial fibrillation (Afib), the most common type of irregular heartbeat.

Combatting retail fraud using a simulator

Posted: 19 Dec 2016 05:46 AM PST

Every year the retail industry lose billions of dollars to fraud in the US alone. To complicate the matter, research in the field has been obstructed due to the sensitive nature of transactional data. To facilitate future studies, researchers set out to develop a simulator generating synthetic transactional data without compromising sensitive information.

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