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Thursday, February 20, 2014

ScienceDaily: Living Well News

ScienceDaily: Living Well News


Family problems experienced in childhood and adolescence affect brain development

Posted: 19 Feb 2014 04:52 AM PST

New research has revealed that exposure to common family problems during childhood and early adolescence affects brain development, which could lead to mental health issues in later life. The study used brain imaging technology to scan teenagers aged 17-19. It found that those who experienced mild to moderate family difficulties between birth and 11 years of age had developed a smaller cerebellum, an area of the brain associated with skill learning, stress regulation and sensory-motor control. The researchers also suggest that a smaller cerebellum may be a risk indicator of psychiatric disease later in life, as it is consistently found to be smaller in virtually all psychiatric illnesses.

Baby hearts need rhythm to develop correctly

Posted: 18 Feb 2014 01:30 PM PST

Researchers report that they have taken an important step toward the goal of growing replacement heart valves from a patient's own cells by determining that the mechanical forces generated by the rhythmic expansion and contraction of cardiac muscle cells play an active role in the initial stage of heart valve formation.

Can you boost your brain power through video?

Posted: 18 Feb 2014 01:30 PM PST

Watching video of simple tasks before carrying them out may boost the brain's structure, or plasticity, and increase motor skills, according to a new study. Brain plasticity is the brain's ability to flex and adapt, allowing for better learning. The brain loses plasticity as it ages.

Smartphone app aids college-age women in abusive relationships, study shows

Posted: 18 Feb 2014 11:34 AM PST

In an effort to connect more young women with safety information, researchers have developed the 'One Love My Plan' smartphone application, an interactive tool that helps college-age women in abusive relationships clarify their priorities and customize personal safety plans. The app is aimed at younger women who are most likely to be in abusive relationships, and are less likely than older adults to seek formal safety resources, instead looking to peers or technology for help and advice.

Beauty and bacteria: Slim, attractive men have less nasal bacteria than heavy men

Posted: 18 Feb 2014 07:07 AM PST

Do attractive traits tell us anything about a person's reproductive health? New research reveals a link between Body Mass Index (BMI) and the amount of bacteria colonizing noses. The results show that heavier men harbor more potentially pathogenic species of bacteria in their nose, compared with slimmer, more traditionally attractive men.

In-hospital formula use deters breastfeeding

Posted: 14 Feb 2014 10:09 AM PST

Mothers who expressed a strong intent to breastfeed did so far less when their babies received formula. Research shows that these mothers are less likely to fully breastfeed their babies in the second month of life and more likely to quit breastfeeding early, even if they had hoped to breastfeed longer. While previous studies have examined the relationship between formula use and breastfeeding, some have questioned the results, wondering if mothers using formula were simply less committed to breastfeeding. To examine this objection, this team surveyed expectant mothers to determine their intentions toward breastfeeding and then followed them closely after delivery to see how they fared.

Beauty, not disease, motivates teens to wear sunscreen

Posted: 13 Feb 2014 06:50 AM PST

After offering information about UV light and sun-protective behaviors, the two health-ed videos diverge: one describes the increased skin cancer risk of UV exposure and the other describes effects on appearance including wrinkles and premature aging. Which of these two videos do you think caused teenagers to use more sunscreen six weeks after it was shown? A new study shows that while teens who watched both videos learned and retained the same amount of knowledge about UV light and sun-protective behaviors, only the teens who watched the appearance-based video (and not the health-based video) actually changed these behaviors.

ScienceDaily: Top Environment News

ScienceDaily: Top Environment News


Zebrafish neurons may lead to understanding of birth defects like spina bifida

Posted: 18 Feb 2014 03:51 PM PST

Using zebrafish, scientists can determine how individual neurons develop, mature and support basic functions like breathing, swallowing and jaw movement. Researchers say that learning about neuronal development and maturation in zebrafish could lead to a better understanding of birth defects such as spina bifida in humans. The zebrafish, a tropical freshwater fish similar to a minnow and native to the southeastern Himalayan region, is well established as a key tool for researchers studying human diseases, including brain disorders.

Los Angeles' vulnerability to future sea level rise projected

Posted: 18 Feb 2014 03:48 PM PST

Los Angeles, a metropolis perched on the edge of a coast, can expect to experience sea level rise of as much as two feet due by 2050 due to climate change, according to current projections.

Synthetic molecular oscillator discoveries may help create artificial cells

Posted: 18 Feb 2014 01:34 PM PST

Researchers have made important discoveries regarding the behavior of a synthetic molecular oscillator, which could serve as a timekeeping device to control artificial cells. The team developed methods to screen thousands of copies of this oscillator using small droplets, and found, surprisingly, that the oscillators inside these small droplets behave in a very diverse way in terms of period, amplitude and phase.

Studies of cow antibodies help scientists understand how our own bodies work

Posted: 18 Feb 2014 12:37 PM PST

Understanding how antibodies work is important for designing new vaccines to fight infectious diseases and certain types of cancer and for treating disorders of the immune system in animals and humans. The immune systems of cows can be used to understand the diversity of antibodies and this knowledge could improve the health of both people and livestock.

Battery small enough to be injected, energetic enough to track salmon

Posted: 18 Feb 2014 11:33 AM PST

Scientists have created a microbattery that packs twice the energy compared to current microbatteries used to monitor the movements of salmon. The battery is just slightly larger than a long grain of rice, however is not the world's smallest battery. Engineers have created batteries far tinier than the width of a human hair, but those smaller batteries don't hold enough energy to power acoustic fish tags. The new battery is small enough to be injected into an organism and holds much more energy than similar-sized batteries.

What cooperation and conflict in an insect's society can teach us about social acceptance

Posted: 18 Feb 2014 11:33 AM PST

A new study looks at colonies of social wasps and explores the acceptance of individuals not related to each other, in a highly organized and adaptable society. The findings show that the age of the individual, and of the colony, defines the costs and benefits of accepting new members into a group.

Evolution stuck in slime for a billion years

Posted: 18 Feb 2014 11:33 AM PST

Researchers are providing a new explanation as to why life remained as little more than slime for a billion years, before rapidly diversifying in the 'Cambrian explosion of life'. Using a new technology originally developed for mineral exploration, the team has shown how varying levels of oxygen and biologically-important elements in the ancient oceans might have triggered the major evolutionary events that brought us here today.

Study of 2011 Illinois flood will lead to better preparedness

Posted: 18 Feb 2014 11:32 AM PST

In May 2011, when the US Army Corps of Engineers used explosives to breach a levee south of Cairo, Ill., diverting the rising waters of the Mississippi and Ohio rivers to prevent flooding in the town, about 130,000 acres of Missouri farmland were inundated. Researchers took advantage of this "once-in-a-scientific-lifetime" occurrence to study the damage. Their study showed that landscape vulnerabilities can be mapped ahead of time to help communities prepare for extreme flooding.

Artificial leaf jumps developmental hurdle

Posted: 18 Feb 2014 09:44 AM PST

Scientists report advances toward perfecting a functional artificial leaf. Designing an artificial leaf that uses solar energy to convert water cheaply and efficiently into hydrogen and oxygen is an important goal. Hydrogen is an important fuel in itself and serves as an indispensible reagent for the production of light hydrocarbon fuels from heavy petroleum feed stocks. Society requires a renewable source of fuel that is widely distributed, abundant, inexpensive and environmentally clean. Society needs cheap hydrogen.

Wings, tails, fins: Study looks at how animals propel themselves

Posted: 18 Feb 2014 09:44 AM PST

The wonder of animal movement -- from the tiniest of insects to the largest fish in the sea -- has been a subject of mystery for ages. But when it comes to animal propulsion, there are almost infinite kinds, but also limits that can't be pushed or breakdowns will occur, according to an unusual study.

Blu-ray player detects microorganisms and toxins on discs

Posted: 18 Feb 2014 08:05 AM PST

In addition to storing films, optical discs can be used to detect microorganisms, toxins, allergens and tumoral biomarkers. Blu-ray technology has allowed researchers to develop a way to find out if a sample contains Salmonella or toxic substances. This simple and cheap analytical system may be applied to clinical diagnosis and environmental monitoring.

Beyond rubber boots and photo ops: Exploring the politics of climate change in the UK

Posted: 18 Feb 2014 07:07 AM PST

Keen to appear responsive to flooding across the U.K., politicians from across the Westminster divide competed to be seen wading through water in front of cameras. Researchers explore how the politics of climate change has shifted from one of consensus, to overt tribalism, and asks how this may be changed by the rise of hitherto fringe political parties.

Beauty and bacteria: Slim, attractive men have less nasal bacteria than heavy men

Posted: 18 Feb 2014 07:07 AM PST

Do attractive traits tell us anything about a person's reproductive health? New research reveals a link between Body Mass Index (BMI) and the amount of bacteria colonizing noses. The results show that heavier men harbor more potentially pathogenic species of bacteria in their nose, compared with slimmer, more traditionally attractive men.

Increase in Arctic cyclones is linked to climate change

Posted: 18 Feb 2014 07:07 AM PST

Winter in the Arctic is not only cold and dark; it is also storm season when hurricane-like cyclones traverse the northern waters from Iceland to Alaska. These cyclones are characterized by strong localized drops in sea level pressure, and as Arctic-wide decreases in sea level pressure are one of the expected results of climate change, this could increase extreme Arctic cyclone activity, including powerful storms in the spring and fall. A new study uses historical climate model simulations to demonstrate that there has been an Arctic-wide decrease in sea level pressure since the 1800's.

Extreme weather images in the media cause fear and disengagement with climate change

Posted: 18 Feb 2014 07:06 AM PST

Extreme weather images represent human suffering and loss. They are iconic of climate change and are symbols of its natural impacts. Reporting on extreme weather has increased over the last few years. In the past social scientists, and media and communication analysts have studied how climate change is depicted in the text of media and social media. While researchers have become increasingly interested in climate change images, they have not yet studied them with respect to symbolizing certain emotions.

Progress in the automatic detection of water contaminants

Posted: 18 Feb 2014 07:06 AM PST

Researchers are working in the development of hydrocarbons early detection devices for rivers in order to prevent contamination that could seriously affect the environment. The new devices use ultraviolet LED as light source that detects contaminant substances thanks to a fluorescence method. This can result in many benefits compared to the current systems due to the development of faster, robust and affordable detection systems. These new devices will be useful for the search of potential dangerous substances present in continental waters.

ScienceDaily: Top Health News

ScienceDaily: Top Health News


Dreams, déjà vu and delusions caused by faulty 'reality testing'

Posted: 19 Feb 2014 06:53 AM PST

New research has delved into the reasons why some people are unable to break free of their delusions, despite overwhelming evidence explaining the delusion isn't real.

Family problems experienced in childhood and adolescence affect brain development

Posted: 19 Feb 2014 04:52 AM PST

New research has revealed that exposure to common family problems during childhood and early adolescence affects brain development, which could lead to mental health issues in later life. The study used brain imaging technology to scan teenagers aged 17-19. It found that those who experienced mild to moderate family difficulties between birth and 11 years of age had developed a smaller cerebellum, an area of the brain associated with skill learning, stress regulation and sensory-motor control. The researchers also suggest that a smaller cerebellum may be a risk indicator of psychiatric disease later in life, as it is consistently found to be smaller in virtually all psychiatric illnesses.

Zebrafish neurons may lead to understanding of birth defects like spina bifida

Posted: 18 Feb 2014 03:51 PM PST

Using zebrafish, scientists can determine how individual neurons develop, mature and support basic functions like breathing, swallowing and jaw movement. Researchers say that learning about neuronal development and maturation in zebrafish could lead to a better understanding of birth defects such as spina bifida in humans. The zebrafish, a tropical freshwater fish similar to a minnow and native to the southeastern Himalayan region, is well established as a key tool for researchers studying human diseases, including brain disorders.

Regenerating orthopedic tissues within the human body

Posted: 18 Feb 2014 03:51 PM PST

Performing tissue repair with stem cells typically requires applying copious amounts of growth factor proteins -- a task that is very expensive and becomes challenging once the developing material is implanted within a body. A team of biomedical engineers has developed a polymer scaffold for growing cartilage that includes gene therapy vectors to induce stem cells to produce the growth factors they need. The new technique -- biomaterial-mediated gene delivery -- is shown to produce cartilage at least as good biochemically and biomechanically as if the growth factors were introduced in the laboratory.

Almost 13 million smoking deaths could be prevented in China by 2050

Posted: 18 Feb 2014 03:51 PM PST

China is home to about one third of the world's smokers and reducing smoking in China could have an enormous public health impact, even on a global scale. Complete implementation of World Health Organization Framework Convention on Tobacco Control recommended policies in China would prevent almost 13 million smoking related deaths by 2050, suggests a new article.

The number of tumor cells spread to sentinel lymph nodes affects melanoma prognosis

Posted: 18 Feb 2014 03:50 PM PST

Cancer cell spread to the sentinel node -- the lymph node to which cancer cells are most likely to spread from a primary tumor -- is a risk factor for melanoma death. The prognosis of a patient largely depends on the number of disseminated cancer cells per million lymphocytes in the sentinel node. Even very low numbers were found to be predictive for reduced survival.

A brain circuit for recognizing change

Posted: 18 Feb 2014 03:48 PM PST

To answer the seemingly simple question "Have I been here before?" we must use our memories of previous experiences to determine if our current location is familiar or novel. Scientists have now identified a region of the hippocampus, called CA2, which is sensitive to even small changes in a familiar context. The results provide the first clue to the contributions of CA2 to memory and may help shed light on why this area is often found to be abnormal in the schizophrenic brain. 

Unusual new HIV drug resistance mechanism revealed

Posted: 18 Feb 2014 03:48 PM PST

For the millions of people living with HIV/AIDS, antiretroviral drugs can be a lifeline, slowing the progress of viral infection. Unfortunately, studies have shown that these benefits can be short-lived: therapy can lead to mutations in the HIV genetic code, which can make the virus resistant to drugs. However, researchers have made some new insight into how the therapy functions and how therapy-induced point mutations actually confer drug resistance.

Baby hearts need rhythm to develop correctly

Posted: 18 Feb 2014 01:30 PM PST

Researchers report that they have taken an important step toward the goal of growing replacement heart valves from a patient's own cells by determining that the mechanical forces generated by the rhythmic expansion and contraction of cardiac muscle cells play an active role in the initial stage of heart valve formation.

Can you boost your brain power through video?

Posted: 18 Feb 2014 01:30 PM PST

Watching video of simple tasks before carrying them out may boost the brain's structure, or plasticity, and increase motor skills, according to a new study. Brain plasticity is the brain's ability to flex and adapt, allowing for better learning. The brain loses plasticity as it ages.

Gene test developed to accurately classify brain tumors

Posted: 18 Feb 2014 12:38 PM PST

Scientists have developed a mathematical method for classifying forms of glioblastoma, an aggressive and deadly type of brain cancer, through variations in the way these tumor cells 'read' genes. Their system was capable of predicting the subclasses of glioblastoma tumors with 92 percent accuracy. With further testing, this system could enable physicians to accurately predict which forms of therapy would benefit their patients the most.

Researchers home in on Alzheimer's disease: Supercomputer helps guide new drug designs

Posted: 18 Feb 2014 12:37 PM PST

Researchers studying peptides using a supercomputer have found new ways to elucidate the creation of the toxic oligomers associated with Alzheimer's disease.

Studies of cow antibodies help scientists understand how our own bodies work

Posted: 18 Feb 2014 12:37 PM PST

Understanding how antibodies work is important for designing new vaccines to fight infectious diseases and certain types of cancer and for treating disorders of the immune system in animals and humans. The immune systems of cows can be used to understand the diversity of antibodies and this knowledge could improve the health of both people and livestock.

Smartphone app aids college-age women in abusive relationships, study shows

Posted: 18 Feb 2014 11:34 AM PST

In an effort to connect more young women with safety information, researchers have developed the 'One Love My Plan' smartphone application, an interactive tool that helps college-age women in abusive relationships clarify their priorities and customize personal safety plans. The app is aimed at younger women who are most likely to be in abusive relationships, and are less likely than older adults to seek formal safety resources, instead looking to peers or technology for help and advice.

The secret of fertile sperm: Novel diagnostic tests and treatments for male infertility?

Posted: 18 Feb 2014 11:22 AM PST

To better understand the causes of male infertility, scientists are exploring the factors, both physiological and biochemical, that differentiate fertile sperm from infertile sperm. Scientists have characterized proteins known as ion channels, which are crucial for sperm fertility and expressed within a sperm cell's plasma membrane.

Medicare beneficiaries return to emergency rooms after nursing home discharge

Posted: 18 Feb 2014 09:48 AM PST

Nursing homes are widely used by Medicare beneficiaries who require rehabilitation after hospital stays. But according to a recent study, a high percentage of Medicare patients who are discharged from nursing homes will return to the hospital or the emergency room within 30 days. The study included more than 50,000 Medicare beneficiaries who were treated at skilled nursing facilities in North and South Carolina, and revealed that approximately 22 percent of beneficiaries required emergency care within 30 days of discharge and 37.5 percent required acute care within 90 days.

ScienceDaily: Top Technology News

ScienceDaily: Top Technology News


'Gravity'-style space debris threat from giant satellite explored

Posted: 19 Feb 2014 04:54 AM PST

Physics students have pointed out that the huge observational satellite Envisat – which lost contact with Earth in 2012 – could potentially pose a threat similar to the events which plague Sandra Bullock in the Oscar-nominated sci-fi thriller Gravity.

Diamonds in the tail of the scorpion: Star cluster Messier 7

Posted: 19 Feb 2014 04:52 AM PST

A new image shows the bright star cluster Messier 7. Easily spotted with the naked eye close to the tail of the constellation of Scorpius, it is one of the most prominent open clusters of stars in the sky — making it an important astronomical research target.

Better way to make sense of 'Big Data?'

Posted: 18 Feb 2014 03:51 PM PST

Big data is everywhere, and we are constantly told that it holds the answers to almost any problem we want to solve. But simply having lots of data is not the same as understanding it. New mathematical tools are needed to extract meaning from enormous data sets. Researchers now challenge the most recent advances in this field, using a classic mathematical concept to tackle the outstanding problems in big data analysis.

Regenerating orthopedic tissues within the human body

Posted: 18 Feb 2014 03:51 PM PST

Performing tissue repair with stem cells typically requires applying copious amounts of growth factor proteins -- a task that is very expensive and becomes challenging once the developing material is implanted within a body. A team of biomedical engineers has developed a polymer scaffold for growing cartilage that includes gene therapy vectors to induce stem cells to produce the growth factors they need. The new technique -- biomaterial-mediated gene delivery -- is shown to produce cartilage at least as good biochemically and biomechanically as if the growth factors were introduced in the laboratory.

Synthetic molecular oscillator discoveries may help create artificial cells

Posted: 18 Feb 2014 01:34 PM PST

Researchers have made important discoveries regarding the behavior of a synthetic molecular oscillator, which could serve as a timekeeping device to control artificial cells. The team developed methods to screen thousands of copies of this oscillator using small droplets, and found, surprisingly, that the oscillators inside these small droplets behave in a very diverse way in terms of period, amplitude and phase.

Rife with hype, exoplanet study needs patience and refinement

Posted: 18 Feb 2014 12:38 PM PST

Despite many trumpeted results, few 'hard facts' about exoplanet atmospheres have actually been collected, and most of these data are of 'marginal utility,' according to a review of exoplanet research by an astrophysicist. The dominant methods for studying exoplanet atmospheres are not intended for planets trillions of miles from Earth. Instead, the future of exoplanet study should focus on the more difficult but comprehensive method of spectrometry.

Scientists successfully simulate 'neutronics' — the behavior of neutrons in a reactor core

Posted: 18 Feb 2014 12:37 PM PST

Scientists and engineers developing more accurate approaches to analyzing nuclear power reactors have successfully tested a new suite of computer codes that closely model "neutronics" — the behavior of neutrons in a reactor core.

Researchers home in on Alzheimer's disease: Supercomputer helps guide new drug designs

Posted: 18 Feb 2014 12:37 PM PST

Researchers studying peptides using a supercomputer have found new ways to elucidate the creation of the toxic oligomers associated with Alzheimer's disease.

Smartphone app aids college-age women in abusive relationships, study shows

Posted: 18 Feb 2014 11:34 AM PST

In an effort to connect more young women with safety information, researchers have developed the 'One Love My Plan' smartphone application, an interactive tool that helps college-age women in abusive relationships clarify their priorities and customize personal safety plans. The app is aimed at younger women who are most likely to be in abusive relationships, and are less likely than older adults to seek formal safety resources, instead looking to peers or technology for help and advice.

Controlling magnetism with an electric field

Posted: 18 Feb 2014 11:33 AM PST

Scientists are now proposing a novel approach to achieve greater memory density while producing less heat: by using an electric field instead of a current to turn magnetism on and off, thereby encoding the electrical devices.

Battery small enough to be injected, energetic enough to track salmon

Posted: 18 Feb 2014 11:33 AM PST

Scientists have created a microbattery that packs twice the energy compared to current microbatteries used to monitor the movements of salmon. The battery is just slightly larger than a long grain of rice, however is not the world's smallest battery. Engineers have created batteries far tinier than the width of a human hair, but those smaller batteries don't hold enough energy to power acoustic fish tags. The new battery is small enough to be injected into an organism and holds much more energy than similar-sized batteries.

When a black hole shreds a star, a bright flare tells the story

Posted: 18 Feb 2014 11:32 AM PST

A new study explains what happens during the disruption of a normal sun-like star by a supermassive black hole. The study shows why observers might fail to see evidence of the hydrogen in the star, casting doubt on a 2012 report of the disruption of an exotic helium star.

Hubble watches stars' clockwork motion in nearby galaxy

Posted: 18 Feb 2014 11:22 AM PST

Using the sharp-eyed NASA Hubble Space Telescope, astronomers have for the first time precisely measured the rotation rate of a galaxy based on the clock-like movement of its stars. According to their analysis, the central part of the neighboring galaxy, called the Large Magellanic Cloud (LMC), completes a rotation every 250 million years.

Progress in the automatic detection of water contaminants

Posted: 18 Feb 2014 07:06 AM PST

Researchers are working in the development of hydrocarbons early detection devices for rivers in order to prevent contamination that could seriously affect the environment. The new devices use ultraviolet LED as light source that detects contaminant substances thanks to a fluorescence method. This can result in many benefits compared to the current systems due to the development of faster, robust and affordable detection systems. These new devices will be useful for the search of potential dangerous substances present in continental waters.