الأربعاء، 14 سبتمبر 2016

ScienceDaily: Top News

ScienceDaily: Top News


Losing teeth raises older adults' risks for physical and mental disability

Posted: 13 Sep 2016 02:33 PM PDT

New research suggests that it is essential for older adults to receive adequate dental care, as well as the support they need to maintain good oral health self-care.

Treatment could prevent neuropathy in diabetic patients

Posted: 13 Sep 2016 12:05 PM PDT

Depleting a chemical called GM3 through genetic modification prevented the development of neuropathy in obese diabetic mice, a new study reports.

Rare Roman gold coin found in Jerusalem at Mt. Zion archaeological dig

Posted: 13 Sep 2016 12:05 PM PDT

Though the Roman Empire occupied Jerusalem and certainly spread its currency there, the only known Roman coins from the ancient Jewish capital have all come to historians and archaeologists through collectors, with uncertain provenance. An exception is a gold coin recently discovered near excavations of wealthy first century priestly houses on Jerusalem's Mt. Zion. Dated to 56 CE, it may be an remnant of looting at the time of the city's destruction in 70 CE.

Land-based food not nutritionally sufficient for wild polar bears, according to new study

Posted: 13 Sep 2016 12:05 PM PDT

On average, a polar bear loses up to 30 percent of its total body mass while fasting during the open-water season. Although some scientists previously believed land-based foods could supplement the bears' nutritional needs until the sea ice returns, a new study has revealed that access to terrestrial food is not sufficient to reduce the rate of body mass loss for fasting polar bears.

New fabric uses sun and wind to power devices

Posted: 13 Sep 2016 11:15 AM PDT

Fabrics that can generate electricity from physical movement have been in the works for a few years. Now researchers have taken the next step, developing a fabric that can simultaneously harvest energy from both sunshine and motion.

Brain scans show building blocks activate spatial ability in children better than board games

Posted: 13 Sep 2016 10:45 AM PDT

Research has found that structured block-building games improve spatial abilities in children to a greater degree than board games.

Language delivers fourfold speedups on big-data problems

Posted: 13 Sep 2016 10:41 AM PDT

Experts are presenting a new programming language, called Milk, that lets application developers manage memory more efficiently in programs that deal with scattered data points in large data sets.

Proton diffusion discovery a boost for fuel cell technologies

Posted: 13 Sep 2016 10:41 AM PDT

Scientists have made an important breakthrough which could lead to the design of better fuel cells. They demonstrate how they synthesized nanometer-sized cage molecules that can be used to transport charge in proton exchange membrane (PEM) applications.

Families caring for an aging America

Posted: 13 Sep 2016 10:41 AM PDT

The demand for family caregivers for adults who are 65 or older is increasing significantly, and family caregivers need more recognition, information, and support to fulfill their responsibilities and maintain their own health, financial security, and well-being, says a new report.

Chronic stress increases level of a protein that decreases availability of mood-regulating chemical

Posted: 13 Sep 2016 10:40 AM PDT

One way chronic stress appears to cause depression is by increasing levels of a protein in the brain that decreases the availability of an important chemical that regulates our mood, scientists report.

Kidney cancer treatment: Potential for new classes of HIF inhibitors

Posted: 13 Sep 2016 10:40 AM PDT

New insights into the potential for new classes of HIF inhibitors to restore control of the hypoxia response -- representing the potential foundation of a new cancer-fighting strategy -- are the focus of recently published research.

Children's willpower linked to smoking habits throughout life

Posted: 13 Sep 2016 10:40 AM PDT

A link between childhood self-control and smoking habits across life have been uncovered by researchers. The researchers found children with low self-control by age 10/11 were more likely to take up smoking in adolescence and had substantially higher rates of smoking as adults, even decades later aged 55.

Impact of advertising psychiatric drugs

Posted: 13 Sep 2016 10:40 AM PDT

Direct-to-consumer advertising of psychiatric medications appears to increase prescribing, which may be having a mixed effect on the quality of treatment, according to a new review of the very few studies on the topic.

The sharing economy's effect on business

Posted: 13 Sep 2016 09:54 AM PDT

The rising tide of product sharing can indeed lift all economic ships, including those of the product manufacturers, or firms, new research indicates.

Memory loss not enough to diagnose Alzheimer's

Posted: 13 Sep 2016 09:54 AM PDT

Relying on clinical symptoms of memory loss to diagnose Alzheimer's disease may miss other forms of dementia caused by Alzheimer's that don't initially affect memory, reports a new study.

Link between walk, aggression discovered

Posted: 13 Sep 2016 09:53 AM PDT

The way people walk can give clues to how aggressive they are, a new exploratory study has found. The work found that the exaggerated movement of both the upper and lower body indicated aggression.

Study links altered brain chemistry, behavioral impairments in fish exposed to elevated carbon dioxide

Posted: 13 Sep 2016 09:52 AM PDT

Increased carbon dioxide concentrations alters brain chemistry that may lead to neurological impairment in some fish, a first-of-its-kind study demonstrates.

'Sleeper effect' accounts for durability of weak messages from credible sources

Posted: 13 Sep 2016 09:52 AM PDT

The least convincing arguments can reverberate in the public consciousness over time -- provided they're delivered by a credible source, explains new research.

Angry drivers have a higher risk of collision

Posted: 13 Sep 2016 09:52 AM PDT

Angry, aggressive drivers have much higher odds of being in a motor vehicle collision than those who don't get angry while driving, a new study shows.

Brain network that controls spread of seizures identified

Posted: 13 Sep 2016 09:52 AM PDT

Researchers have identified a new explanation for why some seizures spread across the brain. Using a computer model based on direct brain recordings from epilepsy patients, they are the first to show the existence of a network of neural regions that can push or pull on the synchronization of the regions directly involved in a seizure.

New tools assess the future of wind power

Posted: 13 Sep 2016 09:52 AM PDT

The largest expert survey yet on any energy technology, in this case wind energy, has been completed by researchers. Wind power costs are expected to continue falling for the next several decades, for three major classes of wind turbines, both onshore and offshore, with prices falling by 24-30% by 2030, and 35-41% by 2050.

Asphalt-based carbon-capture material advances

Posted: 13 Sep 2016 09:52 AM PDT

Scientists have improved the ability of asphalt-derived porous carbon to capture carbon dioxide from natural gas.

Research evaluates risk factors for postpartum depression in mothers of preterm infants

Posted: 13 Sep 2016 09:52 AM PDT

Postpartum depression is the most common complication of pregnancy and childbirth, affecting up to 15 percent of all women within the first three months following delivery. Research has shown that mothers of infants born prematurely have almost double the rates of postpartum depression, particularly during their time in the neonatal intensive care unit (NICU).

Cold plasma will heal non-healing wounds

Posted: 13 Sep 2016 09:47 AM PDT

Treating cells with cold plasma leads to their regeneration and rejuvenation, research shows. This result can be used to develop a plasma therapy program for patients with non-healing wounds, say the investigators.

Integrating graphene, reduced graphene oxide onto silicon chips at room temperature

Posted: 13 Sep 2016 09:47 AM PDT

Researchers have developed a technique that allows them to integrate graphene, graphene oxide and reduced graphene oxide onto silicon substrates at room temperature using lasers. The advance raises the possibility of creating new electronic devices, and the researchers are already planning to use the technique to create smart biomedical sensors.

Discrimination toward overweight adolescents predictive of emotional problems

Posted: 13 Sep 2016 09:47 AM PDT

Discrimination and bullying experienced by sixth graders who are overweight leads to emotional problems by the end of eighth grade, according to new research. The results suggest that to reduce the emotional problems, efforts must not only focus on children and adolescents' weight-loss, but must address the disrespectful and exclusionary behavior by their peer group.

Touchscreens may boost motor skills in toddlers

Posted: 13 Sep 2016 09:47 AM PDT

Does your toddler use a touchscreen tablet? A recent study has shown that early touchscreen use, and in particular actively scrolling the screen, correlates with increased fine motor control in toddlers.

Chess skill is linked to intelligence

Posted: 13 Sep 2016 09:47 AM PDT

Intelligence -- and not just relentless practice -- plays a significant role in determining chess skill, indicates a comprehensive new study. The research provides some of the most conclusive evidence to date that cognitive ability is linked to skilled performance -- a hotly debated issue in psychology for decades -- and refutes theories that expertise is based solely on intensive training.

Children learn quantifiers in the same order no matter what their language is, study suggests

Posted: 13 Sep 2016 09:47 AM PDT

We can assume that children learn to count starting with one and followed by the lists of numbers in ascending order of cardinality (one, two, three). But besides numbers, in languages there are more words that express quantity such as all, some, most, none, etc., the so-called quantifiers. It is a little more difficult imagining how children learn these expressions, whose meaning and use no one bothers to teach explicitly.

Rapid gene analysis method accelerates photosynthesis studies

Posted: 13 Sep 2016 09:47 AM PDT

Researchers used a rapid screening technique that genetically engineers plants -- in real time -- to investigate how to help plants realize their full potential.

Mice born from 'tricked' eggs

Posted: 13 Sep 2016 09:45 AM PDT

Eggs can be 'tricked' into developing into an embryo without fertilization, but the resulting embryos, called parthenogenotes, die after a few days because key developmental processes requiring input from sperm don't happen. However, scientists have developed a method of injecting mouse parthenogenotes with sperm that allows them to become healthy baby mice with a success rate of up to 24 per cent.

New set of recommendations developed to improve quality of cost-effectiveness analyses

Posted: 13 Sep 2016 09:45 AM PDT

The Second Panel on Cost-Effectiveness in Health and Medicine reviewed the current status of the field of cost-effectiveness analysis and developed a new set of recommendations, with major changes including the recommendation to perform analyses from two reference case perspectives and to provide an impact inventory to clarify included consequences, according to an article.

Implementation of value-driven outcomes program associated with reduced costs, improved quality

Posted: 13 Sep 2016 09:45 AM PDT

Implementing an analytic tool that allocates clinical care costs and quality measures to individual patient encounters was associated with significant improvements in value of care for 3 designated outcomes -- total joint replacement, laboratory testing among medical inpatients, and sepsis management, according to a new study.

Rap1, a potential new target to treat obesity

Posted: 13 Sep 2016 09:45 AM PDT

A new mechanism in the mouse brain has been discovered that regulates obesity. The study shows that this new mechanism can potentially be targeted to treat obesity.

Visualizing vortices

Posted: 13 Sep 2016 09:09 AM PDT

Previously too complex to tackle, computer simulations can now show how elliptical vortex rings form, say scientists. Understanding how smoke rings form and dissipate could lead to technology allowing airplanes to soar more efficiently and blood to flow more freely through the human heart.

Understanding how flat phosphorus grows

Posted: 13 Sep 2016 09:09 AM PDT

Modeling the growth of tiny flakes of a two-dimensional form of phosphorus could help researchers one day produce better electronics, say scientists.

Lighting the way to miniature devices

Posted: 13 Sep 2016 09:09 AM PDT

Electromagnetic waves created on a layer of organic molecules could provide the perfect on-chip light source for future quantum communication systems.

Water helps assembly of biofibers that could capture sunlight

Posted: 13 Sep 2016 09:08 AM PDT

Water can serve a previously undiscovered role to help micelles coalesce to spontaneously form long fibers, new research shows. This study could help scientists to understand how light-harvesting molecules are incorporated into the micelle fiber as it assembles, which would be a key step to understanding some forms of artificial photosynthesis.

New score seeks to expand pool of kidneys available for transplant

Posted: 13 Sep 2016 09:08 AM PDT

Researchers analyzed data from thousands of transplants and developed a scoring system for donor kidneys that they hope might expand the pool of available organs in two ways.

Antibody discovery could help create improved flu vaccines

Posted: 13 Sep 2016 09:07 AM PDT

Investigators report that they have discovered a type of immune antibody that can rapidly evolve to neutralize a wide array of influenza virus strains – including those the body hasn't yet encountered.

New technique generates human neural stem cells for tissue engineering, 3D brain models

Posted: 13 Sep 2016 09:07 AM PDT

Researchers have discovered a new technique for generating rapidly-differentiating human neural stem cells for use in a variety of tissue engineering applications, including a three-dimensional model of the human brain, according to a new report.

Risk factors, clinical outcomes of infective endocarditis after transcatheter aortic valve replacement

Posted: 13 Sep 2016 09:07 AM PDT

Among patients undergoing transcatheter aortic valve replacement, younger age, male sex, history of diabetes mellitus, and moderate to severe residual aortic regurgitation were significantly associated with an increased risk of infective endocarditis, and patients who developed endocarditis had high rates of in-hospital mortality and 2-year mortality, according to a study.

Study examines survival outcomes after different lung cancer staging methods

Posted: 13 Sep 2016 09:06 AM PDT

Accurate mediastinal nodal staging is crucial in the management of non-small cell lung cancer (NSCLC) because it directs therapy and has prognostic value. Now researchers have examined five-year survival after endosonography vs mediastinoscopy for mediastinal nodal staging of lung cancer.

Linking perception to action

Posted: 13 Sep 2016 09:06 AM PDT

A neuroscientist has mapped brain cell activity that occurs during the delay between sensation and action. Using a powerful laser-scanning microscope, the work was able to detect the signals from calcium indicators expressed in the neurons well below the brain's surface.

Plum-sized strawberry delivers huge dose of intense flavor

Posted: 13 Sep 2016 09:06 AM PDT

A new strawberry variety concentrates intense flavor in a berry big enough to fill the palm of your hand.

Scientists develop therapeutic protein, protect nerve cells from Huntington's disease

Posted: 13 Sep 2016 09:06 AM PDT

Huntington's disease is an inherited genetic disorder caused by mutations in the gene that encodes huntingtin protein. A new scientific study reveals one way to stop proteins from triggering an energy failure inside nerve cells during Huntington's disease.

Killing superbugs with star-shaped polymers, not antibiotics

Posted: 13 Sep 2016 08:57 AM PDT

Tiny, star-shaped molecules are effective at killing bacteria that can no longer be killed by current antibiotics, new research shows. The star-shaped structures are short chains of proteins called 'peptide polymers.'

Stiff, oxygen-deprived tumors promote spread of cancer

Posted: 13 Sep 2016 08:57 AM PDT

Specific conditions -- tumor hardness and a lack of oxygen at the tumor's core -- lead to breast-cancer progression in laboratory cultures, researchers have found.

Westerly winds have blown across central Asia for at least 42 million years

Posted: 13 Sep 2016 08:56 AM PDT

The winds that gust across the Tibetan Plateau have done so for far longer than previously believed, showing they are resilient to the formation of mountains and changes in carbon dioxide and temperature.

Astronomers observe star reborn in a flash

Posted: 13 Sep 2016 08:56 AM PDT

Astronomers using Hubble have been able to study stellar evolution in real time. Over a period of 30 years dramatic increases in the temperature of the star SAO 244567 have been observed. Now the star is cooling again, having been reborn into an earlier phase of stellar evolution. This makes it the first reborn star to have been observed during both the heating and cooling stages of rebirth.

Molecules released by Klebsiella pneumoniae bacterium pave the way for invasive infection

Posted: 13 Sep 2016 08:56 AM PDT

It's been known that the bacterium Klebsiella pneumoniae secretes small molecules called siderophores that enable it to acquire iron from a host and fuel its spread. Now, researchers have found that these molecules play additional roles in helping the organism invade.

More than just a cue, intrinsic reward helps make exercise a habit

Posted: 13 Sep 2016 07:11 AM PDT

Anyone who has tried sticking to an exercise routine knows it isn't easy. But the combination of a conditioned cue and intrinsic reward may be the key to developing an exercise habit, according to a new study.

Cancer bests Zika as top health care concern, national health checkup finds

Posted: 13 Sep 2016 07:09 AM PDT

While Zika remains a hot topic in the news, a new survey reveals that Americans believe the country's most significant health care challenge is cancer. In fact, the survey findings report "infectious diseases, such as Zika and Ebola," are tied with HIV/AIDS as the least important health care challenges listed by respondents following cancer; obesity; neurological diseases, such as Alzheimer's disease and amyotrophic lateral sclerosis; diabetes and heart disease.

Cyclotron opens up new prospects for fundamental, applied research in radiopharmaceutical chemistry

Posted: 13 Sep 2016 07:06 AM PDT

A new particle accelerator generating radioactive isotopes for use in nuclear chemistry will be employed to create new medical radiopharmaceuticals, report scientists.

Hierarchical control, energy balancing is obligatory for storage systems in modern grids

Posted: 13 Sep 2016 07:06 AM PDT

A new technology has been developed for the decentralized control of microgrids, especially in the energy storage section, and adopted a new standard for hierarchical control in the system. The research is related to energy and power management in the modern grid.

New strategy to obtain a specific type of amyloid-beta aggregate that may underlie neuronal death in Alzheimer's disease

Posted: 13 Sep 2016 07:06 AM PDT

For the first time, researchers describe how to prepare a specific type of aggregate of the amyloid-beta protein with the ability to perforate the cell membrane. What causes neuron death and the subsequent cognitive decline in Alzheimer´s disease is still unknown.

Group work can harm memory

Posted: 13 Sep 2016 07:06 AM PDT

Collaborating in a group to remember information is harmful, new research suggests. The research statistically analysed 64 earlier collaborative remembering studies and found that groups recall less than their individual members would if working alone.

Asteroid named after professor

Posted: 13 Sep 2016 07:06 AM PDT

A professor has had his name written among the stars, after an asteroid was named after him.

With great power comes great laser science

Posted: 13 Sep 2016 07:06 AM PDT

It is a very unusual kind of laser: researchers have built a device which emits ultrashort flashes of infrared light with extremely high energy.

Radical new approach to behavior change for public health

Posted: 13 Sep 2016 07:06 AM PDT

A new approach to behavior change that has been shown to successfully change hygiene, nutrition and exercise-related behaviors is described in a new paper.

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