ScienceDaily: Latest Science News


Two sensors in one: Nanoparticles that enable both MRI and fluorescent imaging could monitor cancer, other diseases

Posted: 18 Nov 2014 09:56 AM PST

Chemists have developed new nanoparticles that can simultaneously perform magnetic resonance imaging and fluorescent imaging in animals. Such particles could help scientists to track specific molecules produced in the body, monitor a tumor's environment, or determine whether drugs have successfully reached their targets.

Musicians show advantages in long-term memory

Posted: 18 Nov 2014 09:55 AM PST

Psychologists have demonstrated a link between musical training and long-term memory advantages.

A bird's-eye view of the protein universe: First global picture of the evolutionary origins of proteins

Posted: 18 Nov 2014 09:55 AM PST

How exactly did proteins first come to be? Do they all share a single common ancestor, or did proteins evolve from many different origins? Forming a global picture of the protein universe is crucial to addressing these and other important questions. Now, new research is providing a first step toward piecing together a global picture of the protein universe that may answer these questions and suggest strategies for the design of new proteins.

Jurassic climate of large swath of western US was more complex than previously known: Unexpected abrupt change from arid to wet

Posted: 18 Nov 2014 09:54 AM PST

Climate over a large swath of the western US was more complex during the Jurassic than previously known, according to new research. Instead of a gradual transition from dry to wetter, chemical analysis of ancient soils reveals an unexpected abrupt change, say paleontologists. Samples were from the Morrison Formation, a massive rock unit sprawling across 13 states and Canada that's produced significant dinosaur discoveries for over 100 years.

Using science to open way to 'blue economy'

Posted: 18 Nov 2014 09:54 AM PST

New science and software make Belize coastal zone management plan better for people and the environment. With historic expansion of coastal and ocean development, ecosystems like coral reefs and mangrove forests are put at unprecedented risk. Yet, planners often lack good information about how human activities will impact shoreline and ocean habitats now and in the future. This study developed the information the Belizean government sought to make informed management decisions.

Mother's soothing presence makes pain go away, changes gene activity in infant brain

Posted: 18 Nov 2014 09:54 AM PST

A mother's 'TLC' not only can help soothe pain in infants, but it may also impact early brain development by altering gene activity in a part of the brain involved in emotions, according to a new study.

New model clarifies photoexcited thin-film lattice dynamics

Posted: 18 Nov 2014 09:51 AM PST

A research team has developed an analytical model to describe the structural dynamics of photoexcited thin films and verified it by ultrafast X-ray diffraction.

As elephants go, so go the trees

Posted: 18 Nov 2014 09:45 AM PST

Overhunting has been disastrous for elephants, but their forest habitats have also been caught in the crossfire. A first-of-its-kind study shows that the dramatic loss of elephants, which disperse seeds after eating vegetation, is leading to the local extinction of a dominant tree species, with likely cascading effects for other forest life.

Age matters: Young larvae boost pollen foraging in honey bees

Posted: 18 Nov 2014 08:00 AM PST

Adult bees foraging for food use the changing pheromone signals of the young to adjust what nutritional resources they collect. Honey bees return to the hive with one and one half times more protein-rich pollen, when exposed to young larvae as compared to old larvae. The researchers also discovered that significantly fewer foragers return home empty -- a finding that could have an impact in agricultural enterprises.

Spice up your memory: Just one gram of turmeric a day could boost memory

Posted: 18 Nov 2014 08:00 AM PST

Adding just one gram of turmeric to breakfast could help improve the memory of people who are in the very early stages of diabetes and at risk of cognitive impairment.

Biologists explore link between memory deficit and misfiring circadian clock in Siberian hamsters

Posted: 18 Nov 2014 08:00 AM PST

By disrupting Siberian hamsters' circadian rhythms, scientists have identified a part of the brain that, when misfiring, inhibits memory. The work could lead to therapies for neurodegenerative diseases in humans.

DNA methylation: The role it plays in aging cells

Posted: 18 Nov 2014 08:00 AM PST

Although every person's DNA remains the same throughout their lives, scientists know that it functions differently at different ages. As people age, drastic changes occur in their DNA methylation patterns, which are thought to act as a "second code" on top of the DNA that can lock genes in the on or off position. However, what the consequences of these changes are remains a mystery.

Better micro-actuators to transport materials in liquids

Posted: 18 Nov 2014 07:59 AM PST

Researchers have developed improved forms of tiny magnetic actuators thanks to new materials and a microscopic 3-D printing technology.

Soy spells fewer hot flashes for certain women

Posted: 18 Nov 2014 07:59 AM PST

Does soy in the diet help with hot flashes? It does, but only for women whose bodies can produce the soy metabolite equol, reports a new study.

Viking fortress discovery: Archaeological dating results

Posted: 18 Nov 2014 07:56 AM PST

In September 2014, archaeologists announced the discovery of a Viking fortress in a field belonging to Vallø Manor, located west of Køge on the east coast of Sealand. This was the first discovery of its kind in Denmark in over 60 years. Since then, archaeologists have been waiting impatiently for the results of the dating of the fortress. Now the first results are available.

Physicists suggest new way to detect dark matter

Posted: 18 Nov 2014 07:56 AM PST

For years physicists have been looking for the universe's elusive dark matter, but so far no one has seen any trace of it. Maybe we are looking in the wrong place? Now physicists propose a new technique to detect dark matter.

Training can lead to synesthetic experiences: Does learning the 'color of' specific letters boost IQ?

Posted: 18 Nov 2014 07:55 AM PST

A new study has shown for the first time how people can be trained to 'see' letters of the alphabet as colors in a way that simulates how those with synesthesia experience their world.

New clue in celiac disease puzzle: Cause of oat toxicity explained

Posted: 18 Nov 2014 07:55 AM PST

Researchers have identified why some people with celiac disease show an immune response after eating oats. The researchers have identified the key components in oats that trigger an immune response in some people with celiac disease. The findings may lead to better tests for oat toxicity, and have implications for new treatments being developed for celiac disease.

History's lesson reveals depth of fish catch decline

Posted: 18 Nov 2014 07:54 AM PST

Scientists in Australia have used historic media to measure the decline in Queensland's pink snapper fishery, highlighting a drop of almost 90 percent in catch rates since the 19th century.

Finding new ways to make drugs

Posted: 18 Nov 2014 07:54 AM PST

Chemists have developed a revolutionary new way to manufacture natural chemicals by clipping smaller molecules together like Lego. They have used the new method to assemble a scarce anti-inflammatory drug with potential to treat cancer and malaria, pseudopterosin.

Establishment of induced pluripotent stem cells from Werner syndrome fibroblasts

Posted: 18 Nov 2014 07:54 AM PST

Induced pluripotent stem (iPS) cells from Werner Syndrome fibroblasts have been established, scientists report. The therapeutic methods for this disease are very limited. It is expected that patient-derived iPS cells can be used for the development of innovative therapies. Additionally, the mutated gene in patient-derived iPS cells can be corrected by genome editing. This advantage will be help in the development of new gene and cell therapies for Werner syndrome.

Some flu viruses potentially more dangerous than others

Posted: 18 Nov 2014 07:54 AM PST

Certain subtypes of avian influenza viruses have the potential to cause more severe disease in humans than other avian influenza subtypes and should be monitored carefully to prevent spread of disease, according to a study.

Pregnant women with congenital heart disease may have low complication risks during delivery

Posted: 18 Nov 2014 07:54 AM PST

Pregnant women with congenital heart disease had very low risks of irregular heart beat or other heart-related complications during labor and delivery, a study has shown. However, pregnant women with congenital heart disease were more likely to undergo cesarean section and remain in the hospital longer.

Trans fat consumption linked to diminished memory in working-aged adults

Posted: 18 Nov 2014 07:54 AM PST

Trans fat consumption is adversely linked to memory sharpness in young to middle-aged men. Men under 45 years old who ate higher amounts of trans fats, which are found in processed foods, had significantly reduced ability to recall words. Further studies need to determine whether these effects extend to women under 45 years old.

Early detectable vascular disease linked to erectile dysfunction

Posted: 18 Nov 2014 07:54 AM PST

Men who have multiple detectable subclinical vascular abnormalities are more likely to develop erectile dysfunction. The presence of coronary artery calcification may predict the future onset of erectile dysfunction.

Moms' pre-pregnancy weight impacts risk of dying decades later

Posted: 18 Nov 2014 07:54 AM PST

People whose mothers were overweight before pregnancy may be at an elevated risk to die from cardiovascular disease. An overweight mother also contributes to her offspring's obesity and cardiovascular disease risk factors.

Cocaine users experience abnormal blood flow, risk heart disease

Posted: 18 Nov 2014 07:54 AM PST

Cocaine users have subtle abnormalities in blood flow through the heart's smallest blood vessels. The abnormalities can occur while the heart appears normal on imaging test, putting cocaine users at risk for heart disease or death.

Being poor is not the same everywhere

Posted: 18 Nov 2014 07:48 AM PST

Young people growing up in impoverished neighborhoods who perceive their poor communities in a positive light report better health and well-being than those with worse perceptions of where they live, new research suggests.

U.S. nurse leaders issue blueprint for 21st century nursing ethics

Posted: 18 Nov 2014 07:48 AM PST

An unprecedented report looks at the ethical issues facing the nursing profession, as the American Nursing Association prepares to release a revised Code of Ethics in 2015.

Helping wheat defend itself against damaging viruses

Posted: 18 Nov 2014 07:48 AM PST

A patent-pending technology has built resistance to certain viruses in wheat plants. These viruses can be an economic drain to wheat farmers by costing them 5 to 10 percent or more in yield reductions per crop. Although the technology involves genetic engineering, which is not an option for wheat in today's market, the research has extended to building this resistance in non-genetically engineered wheat lines as well.

Testosterone replacement therapy does not increase cardiovascular risks in men with low testosterone levels

Posted: 18 Nov 2014 07:48 AM PST

An important new study of men who have undergone testosterone replacement therapy has found that taking supplemental testosterone does not increase their risk of experiencing a major adverse cardiac event, such as a heart attack or stroke.

Protected area expansion target: Is a huge promise lost due to land conversion?

Posted: 18 Nov 2014 06:16 AM PST

By expanding the protected area network to 17 percent of land, countries could triple the present protection levels of terrestrial vertebrates. Globally coordinated protected area network expansion could deliver a result 50 percent more efficient compared to countries looking only at biodiversity within their own area. Land conversion is, however, fast degrading options for conservation.

Using sewage sludge to obtain bioenergy

Posted: 18 Nov 2014 06:16 AM PST

Researchers have found a way to increase biomass production by using sewage sludge as energy crop fertilizers. The usage of sewage sludge to fertilize energy crops could be an opportunity to release residues since these plantations are not intended for food industry.

Cheap malaria drug could treat colorectal cancer effectively too, say experts

Posted: 18 Nov 2014 06:16 AM PST

A common malaria drug could have a significant impact on colorectal cancer providing a cheap adjunct to current expensive chemotherapy, medical experts say. Colorectal cancer (CRC) makes up about 10 percent of the annual 746,000 global cancer cases in men and 614,000 cases in women.

Laboratory breakthrough offers promise for spinal cord injury patients to breathe on their own again

Posted: 18 Nov 2014 06:13 AM PST

A procedure that restores function to muscles that control breathing – even when they have been paralyzed for more than a year -- has been developed by researchers. The breakthrough offers hope that patients with severe spinal cord injuries will be able to breathe again on their own.

Heart muscle inflammation, swelling peak twice after heart attack

Posted: 18 Nov 2014 06:13 AM PST

Results of a new study challenge the current consensus in cardiology that peak myocardial edema, or heart muscle swelling, only occurs just after a myocardial infarction, or heart attack.

Cardiac stem cell therapy may heal heart damage caused by Duchenne muscular dystrophy

Posted: 18 Nov 2014 06:13 AM PST

Injections of cardiac stem cells might help reverse heart damage caused by Duchenne muscular dystrophy, potentially resulting in a longer life expectancy for patients with the chronic muscle-wasting disease, researchers report.

'Probiotics' for plants boost detox abilities; untreated plants overdose and die

Posted: 18 Nov 2014 06:13 AM PST

Scientists using a microbe that occurs naturally in eastern cottonwood trees have boosted the ability of willow and lawn grass to withstand the withering effects of the nasty industrial pollutant phenanthrene.

Major brain pathway rediscovered after century-old confusion, controversy

Posted: 18 Nov 2014 06:13 AM PST

A scientist looking at MRI scans of human brains noticed a large fiber pathway that seemed to be part of the network that processes visual information. He just couldn't couldn't find it in any of the modern textbooks. In a new article, a research team describes the history and controversy of the elusive brain pathway, explains how modern MRI techniques rediscovered it, and gives analytical tools researchers can use to identify the brain structure -- now known as the vertical occipital fasciculus.

Acculturative stress found to be root cause of high depression rates in Latino youth

Posted: 18 Nov 2014 04:29 AM PST

Acculturative stress may explain, in part, why Indiana's Latino youth face an alarming disparity in depression and suicide rates when compared to their white counterparts, researchers say.

Benefits of whistleblower programs outweigh costs

Posted: 18 Nov 2014 04:29 AM PST

New accounting research study finds whistleblowers are a valuable source of information for regulators in the investigation and prosecution of possible securities law violations. Until now, research about the impact whistleblowers have on enforcement outcomes has been limited, yet policymakers continue to push for increased rewards for whistleblowers without regard to the economic benefits of doing so.

Premature infants benefit from early sodium supplementation according to new research

Posted: 18 Nov 2014 04:29 AM PST

Early sodium supplementation for very premature infants can enhance weight gain according to a recent study. This study found significant differences between the infants who received sodium supplementation and those who received the placebo.

Twenty-five year hunt uncovers heart defect responsible for cardiovascular diseases

Posted: 18 Nov 2014 04:29 AM PST

The landmark discovery of a tiny defect in a vital heart protein has for the first time enabled heart specialists to accurately pinpoint a therapeutic target for future efforts in developing a drug-based cure for cardiovascular diseases.

US radiology departments prepare for Ebola

Posted: 18 Nov 2014 04:29 AM PST

Radiologists have issued a special report on radiology preparedness for handling cases of Ebola virus. Healthcare administrators are placing a major emphasis on Ebola preparedness training at medical facilities throughout the U.S. Failure to have proper procedures in place to diagnose and treat patients with Ebola virus was cited as a major reason for infection of medical personnel in Dallas.

Fundamental constants are still constant: Atomic clocks prove stability of mass ratio of protons to electrons

Posted: 18 Nov 2014 04:27 AM PST

Are the fundamental constants really constant? Recent investigations have shown that one essential fundamental constant -- namely the mass ratio of protons to electrons -- can have changed only by a maximum of one part in a million over the age of our solar system (i.e. extrapolated over approx. 5 billion years). Previously, scientists deemed the possible changes to be twice as high. To obtain this result, physicists from PTB compared caesium and ytterbium atomic clocks with each other for 7 years.

Gravity may have saved the universe after the Big Bang, say researchers

Posted: 18 Nov 2014 04:27 AM PST

Physicists may now be able to explain why the universe did not collapse immediately after the Big Bang. Studies of the Higgs particle -- discovered at CERN in 2012 and responsible for giving mass to all particles -- have suggested that the production of Higgs particles during the accelerating expansion of the very early universe (inflation) should have led to instability and collapse.

Going against the flow: Targeting bacterial motility to combat disease

Posted: 18 Nov 2014 04:27 AM PST

The ability to move enables many bacteria to reach a specific niche or to leave hostile environments. The bacterium Mycoplasma gallisepticum is a poultry pathogen that is capable of gliding over solid surfaces. Scientists have now identified the proteins responsible for this gliding mechanism. Interrupting the gliding mechanism could be a way to make the bacteria less virulent, but it could also help in the development of vaccines against the pathogen, experts say.

Ferroptosis, a novel form of non-apoptotic cell death, holds great therapeutic potential

Posted: 18 Nov 2014 04:26 AM PST

Ferroptosis is a recently recognized form of regulated necrosis. Up until now, this form of cell death has only been thought to be a possible therapeutic approach to treat tumor cells. Yet, ferroptosis also occurs in non-transformed tissues as demonstrated by this study, thus implicating this cell death pathway in the development of a wide range of pathological conditions. More specifically, the deletion of the ferroptosis-regulating enzyme Gpx4 in a pre-clinical model results in high ferroptosis rates in kidney tubular epithelial cells causing acute renal failure.

Recycling Styrofoam into rigid plastic

Posted: 18 Nov 2014 04:26 AM PST

Mexican entrepreneurs designed the first national machine capable of recycling Styrofoam (expanded polystyrene) and transform it into a raw material used in the manufacture of transparent hard plastic.

Mechanisms behind 'Mexican waves' in brain revealed by scientists

Posted: 18 Nov 2014 04:26 AM PST

Scientists have revealed the mechanisms that enable certain brain cells to persuade others to create 'Mexican waves' linked with cognitive function. Inhibitory neurons can vibrate and they are equipped with mechanisms that enable them to persuade networks of other neurons into imitating their vibrations -- setting off 'Mexican waves' in the brain. The scientists believe these collective, oscillating vibrations play a key role in cognitive function. Their research sheds light on how inhibitory neurons use different communication processes to excitatory neurons, which share information via an internal pulsing mechanism.

Unexpected cross-species contamination in genome sequencing projects

Posted: 18 Nov 2014 04:26 AM PST

As genome sequencing has gotten faster and cheaper, the pace of whole-genome sequencing has accelerated, dramatically increasing the number of genomes deposited in public archives. Although these genomes are a valuable resource, problems can arise when researchers misapply computational methods to assemble them, or accidentally introduce unnoticed contaminations during sequencing.

Viruses impaired if their targets have diverse genes

Posted: 18 Nov 2014 04:25 AM PST

When a viral infection spread through five genetically identical mice in a row, the virus replicated faster and became more virulent or severe. But when the infection spread one-by-one through five genetically diverse mice, the virus had trouble adapting and became less virulent. A new study suggests that increased genetic diversity should be promoted in livestock and in captive-bred endangered species so as to limit their risk of getting deadly infections.

New school meal requirements: More harm than good?

Posted: 18 Nov 2014 04:25 AM PST

New federal regulations requiring school meals to contain more whole grains, less saturated fat and more fruits and vegetables, while perhaps improving some aspects of the food being served at schools across the United States, may also be perpetuating eating habits linked to obesity, diabetes and other diet-related diseases, an analysis has found.

Alcohol taxes can improve health, lead to more jobs

Posted: 18 Nov 2014 04:25 AM PST

Alcohol tax increases reduce the harms resulting from excessive alcohol consumption, and may lead to a small net increase in the number of jobs, according to new research.

Formal protocol for ultra-early treatment of aneurysmal subarachnoid hemorrhage

Posted: 18 Nov 2014 04:25 AM PST

A formal protocol for delivering emergency treatment to patients with subarachnoid hemorrhage (SAH) from ruptured aneurysms within the first few hours after bleeding occurs. Offered day and night, the protocol reduces the incidence of repeated hemorrhage during the hospital stay and improves clinical outcomes in patients with aneurysmal SAH.

Verbal abuse in the workplace: Are men or women most at risk?

Posted: 18 Nov 2014 04:25 AM PST

There is no significant difference in the prevalence of verbal abuse in the workplace between men and women, according to a systematic review of the literature. Verbal abuse is the most common form of workplace violence. It can lead to many consequences, particularly at the psychological and organizational levels.

Catering to needs of in-store, online customers boosts marketing effectiveness, revenue

Posted: 17 Nov 2014 02:45 PM PST

A University of Missouri researcher found that consumers' preferences differ when they are shopping in a physical store compared to shopping online. Catering to shoppers' online and in-store preferences can increase the effectiveness of traditional marketing tactics such as direct marketing and enhanced customer service, the researcher found.

Geologic mapping of asteroid Vesta reveals history of large impacts

Posted: 17 Nov 2014 02:45 PM PST

A project to map the impact sequence on the asteroid Vesta is helping scientists compare its history to other solar system objects.

Computer model provides a new portrait of carbon dioxide

Posted: 17 Nov 2014 02:45 PM PST

An ultra-high-resolution computer model has given scientists a stunning new look at how carbon dioxide in the atmosphere travels around the globe. Plumes of carbon dioxide in the simulation swirl and shift as winds disperse the greenhouse gas away from its sources. The simulation also illustrates differences in carbon dioxide levels in the northern and southern hemispheres and distinct swings in global carbon dioxide concentrations as the growth cycle of plants and trees changes with the seasons.

Nothing fishy about health benefits of plant-based omega-3 fatty acid

Posted: 17 Nov 2014 02:45 PM PST

Increasing the amount of omega-3s in your diet, whether from fish or flax, will likely decrease your risk of getting heart disease, according to nutritionists. A substantial amount of evidence exists supporting the heart-health benefits of eicosapentaenoic acid and docosahexaenoic acid (EPA and DHA), marine-derived omega-3 fatty acids. However, much less evidence exists to demonstrate the positive effects of alpha-linolenic acid (ALA), a plant-based omega-3 fatty acid.