Thursday, January 8, 2015

Why some geckos lose their ability to stick to surfaces


ScienceDaily: Latest Science News


Posted: 07 Jan 2015 05:49 PM PST
Biologists have found that evolution can downgrade or entirely remove adaptations a species has previously acquired, giving the species new survival advantages. The researchers focused their attention on geckos, specifically the adhesive system that allows geckos to cling to surfaces. They found that gecko species in which the adhesive system was either lost or simplified saw elevated rates of evolution related to morphology and locomotion.
Posted: 07 Jan 2015 05:48 PM PST
Individuals on a moderate-fat diet who ate an avocado every day had lower bad cholesterol than those on a similar diet without an avocado a day or on a lower-fat diet, researchers report.
Posted: 07 Jan 2015 05:46 PM PST
Employees who are suffering from burnout are more likely to make spontaneous and irrational decisions. Analysis showed that participants who showed signs of burnout displayed more spontaneous and irrational decision-making. They were also more likely to avoid making decisions.
Posted: 07 Jan 2015 05:46 PM PST
Whilst university degrees and work experience offer value in terms of employees' work performance, neither prepare individuals for the softer people skills necessary in the workplace. In a study of 2,500 individuals, neither a degree nor experience were related to an employees' performance in softer skills, such as building relationships with others or giving support. Speaking of this link, the authors suggest that such people skills may be innate or developed earlier in childhood.
Posted: 07 Jan 2015 05:46 PM PST
Different labels for difficulties with reading have been found to be associated with varying beliefs in how effective teachers believe they can be. Researchers asked a sample of primary school teachers to complete two questionnaires about children who were having difficulty with learning to read. One questionnaire sought to discover how much the teachers believed they could do to help the children. The other questionnaire sought to discover the extent to which the teachers believed that the children's difficulties were 'essential'- that is, how far they marked out the difficulties as having a distinct biological basis.
Posted: 07 Jan 2015 05:45 PM PST
Employees using various technological devices to stay "switched on" for work outside of office hours may face detrimental effects to their wellbeing and private life.
Posted: 07 Jan 2015 05:45 PM PST
High quality me-time not only improves your psychological wellbeing it can also make you a more engaged employee.
Posted: 07 Jan 2015 05:44 PM PST
Seismologists will again be monitoring the ground-shaking cheers of Seahawks fans, this year with a bigger team, better technology and faster response times. Scientists with the Pacific Northwest Seismic Network will install instruments to provide real-time monitoring of the stadium's movement during the 2015 NFL playoffs.
Posted: 07 Jan 2015 01:23 PM PST
NASA has contributed two Earth science instruments for NOAA's space weather observing satellite called the Deep Space Climate Observatory or DSCOVR, set to launch in Jan., 2015. One of the instruments called EPIC or Earth Polychromatic Imaging Camera will image the Earth in one picture, something that hasn't been done before from a satellite. EPIC will also provide valuable atmospheric data.
Posted: 07 Jan 2015 01:23 PM PST
New findings include Hubble Space Telescope images that show decade-old shells of ionized gas racing away from the Superstar Eta Carinae at a million miles an hour, and new 3-D models that reveal never-before-seen features of the stars' interactions.
Posted: 07 Jan 2015 01:23 PM PST
It's true: teens are misunderstood. But apparently, teens themselves have dramatic misperceptions about what their peers are doing when it comes to sex, drugs and studying, possibly prompting them to conform to social norms that don't exist.
Posted: 07 Jan 2015 01:23 PM PST
A new study investigated the complex interactions between magnesium intake, genes and ethnicity in determining risk for type 2 diabetes in two populations of women. The specific associations yielded by the analysis illustrate how health guidance could become considerably more personalized.
Posted: 07 Jan 2015 01:22 PM PST
Whether you are a Pygmy in the Congolese rainforest or a hipster in downtown Montreal, certain aspects of music will touch you in exactly the same ways. Researchers found that although the groups felt quite differently about whether specific pieces of music made them feel good or bad, their subjective and physiological responses to how exciting or calming they found the music to be appeared to be universal.
Posted: 07 Jan 2015 12:11 PM PST
A new study has found partisanship is at its highest levels among the most-educated Americans, who gravitate toward facts that agree with their own political leanings.
Posted: 07 Jan 2015 12:11 PM PST
A new study found that Muslims and Latinos were significantly overrepresented, and African-Americans largely missing, in crime stories aired over five years on prominent network and cable breaking news programs.
Posted: 07 Jan 2015 12:11 PM PST
In the largest study to date on infidelity, researchers have learned that men and women are different when it comes to feeling jealous. In a poll of nearly 64,000 Americans this study provides the first large-scale examination of gender and sexual orientation differences in response to potential sexual versus emotional infidelity in US adults.
Posted: 07 Jan 2015 12:07 PM PST
A new intermediate step and unexpected enzymatic activity in a metabolic pathway in the body, which could lead to new drug design for psychiatric and neurodegenerative diseases, has been discovered by researchers. This pathway produces several neurotransmitter regulators and is responsible for metabolizing nearly 99 percent of the tryptophan in the body. Tryptophan is a precursor of serotonin, the neurotransmitter responsible for mood.
Posted: 07 Jan 2015 12:07 PM PST
Scientists have used a new instrument to map an enzyme that could play an important role in anti-cancer drug development.
Posted: 07 Jan 2015 11:08 AM PST
A new analysis suggests that large-scale wave energy systems developed in the Pacific Northwest should be comparatively steady, dependable and able to be integrated into the overall energy grid at lower costs than some other forms of alternative energy, including wind power.
Posted: 07 Jan 2015 11:07 AM PST
A new study shows that habitat alteration may be less important than other factors-- such as human behavior-- in driving the effects of "exurban" development on bird communities. These unexpected results are fueling more questions that may ultimately lead to informed landowners lessening their impacts on local wildlife.
Posted: 07 Jan 2015 11:07 AM PST
An exhaustive analysis of data from more than 40,000 cases of brain trauma in children provides convincing evidence that protecting children in advance from head injuries is the key to reducing their severity.
Posted: 07 Jan 2015 11:07 AM PST
Expectant parents should avoid the use of ultrasounds for nonmedical reasons, according to maternal-fetal medicine experts. "Ultrasound is a valuable tool when done for medical purposes by trained professionals," said one physician. "But this technology should not be used for entertainment purposes to see an image of a baby or to identify gender."
Posted: 07 Jan 2015 10:39 AM PST
People who watch excessive amounts of TV tend to eat more unhealthy foods and might not understand the foundations of a healthy diet, a study suggests.
Posted: 07 Jan 2015 10:39 AM PST
A major barrier to finding a cure for HIV/AIDS is the presence of latent HIV in the cells of chronically infected individuals. But researchers may have now pinpointed a strategy for eliminating the residual virus.
Posted: 07 Jan 2015 10:14 AM PST
By looking at the expression levels of downstream genes of the regulators in breast cancer, researchers have identified a gene signature in E2F4 that is predictive of estrogen receptor positive (ER+) breast cancer. The findings define a new opportunity for personalizing medicine for women whose Oncotype DX assay results classify them as of 'intermediate-risk for recurrence.'
Posted: 07 Jan 2015 10:14 AM PST
Bacteria that have evolved to eat their way through yeast in the human gut could inform the development of new treatments for people suffering from bowel diseases, experts report.
Posted: 07 Jan 2015 10:14 AM PST
A third of oil reserves, half of gas reserves and over 80% of current coal reserves globally should remain in the ground and not be used before 2050 if global warming is to stay below the 2°C target agreed by policy makers, according to new research.
Posted: 07 Jan 2015 10:13 AM PST
When you have a conflict with your significant other, do you withdraw like a turtle into its shell? Or do you expect your partner to be a mind reader about what ticks you off? Both of those can be harmful, but in different ways and for different reasons, according to a new study.
Posted: 07 Jan 2015 10:13 AM PST
For the first time, scientists have identified a protein that appears to be a nutrient sensor for the key growth-regulating mTORC1 metabolic pathway.
Posted: 07 Jan 2015 09:39 AM PST
Scientists have uncovered the mystery of why blue light-emitting diodes (LEDs) are so difficult to make, by revealing the complex properties of their main component -- gallium nitride -- using sophisticated computer simulations.
Posted: 07 Jan 2015 09:39 AM PST
Listening to older sisters of mentally ill siblings discuss their mothers' difficult caregiving experiences made a researcher wonder if something important about families was missed in a prior study that focused on women caregivers of mentally ill family members.
Posted: 07 Jan 2015 09:39 AM PST
A new study suggests that dogs may have first successfully migrated to the Americas only about 10,000 years ago, thousands of years after the first human migrants crossed a land bridge from Siberia to North America.
Posted: 07 Jan 2015 09:31 AM PST
DNA sequences were once thought to be identical from cell to cell, but it's increasingly understood that mutations can arise during brain development that affect only certain groups of brain cells. A new technique allows these subtle mutation patterns to be traced and mapped spatially for the first time.
Posted: 07 Jan 2015 09:31 AM PST
Scientists have turned asphalt into an effective, environmentally friendly carbon-capture material for use at natural gas wellheads.
Posted: 07 Jan 2015 09:31 AM PST
The lowering of the ocean's pH is making it harder for corals to grow their skeletons and easier for bioeroding organisms to tear them down. Erosion rates increase tenfold in areas where corals are also exposed to high levels of nutrients, according to a new study. As sea level rises, these reefs may have a harder time growing toward the ocean surface, where they get sunlight they need to survive.
Posted: 07 Jan 2015 09:31 AM PST
A new study into the pre-industrial baseline levels of heavy metals in sediment carried by the Athabasca River shows that emissions from the Alberta oil sands and other human activities have not yet increased the concentrations traveling to the Athabasca Delta around 200 kilometers from the oil sands.
Posted: 07 Jan 2015 09:31 AM PST
An evaluation of Ohio's Behavioral Health/Juvenile Justice initiative in 11 counties found the program benefits most young offenders diverted from detention centers to community-based agencies to treat mental health issues, drug problems or both.
Posted: 07 Jan 2015 09:31 AM PST
Rather than soothe and comfort, a hot cup of tea or cocoa can cause people with sensitive teeth a jolt of pain. But scientists are now developing a new biomaterial that can potentially rebuild worn enamel and reduce tooth sensitivity for an extended period. They have tested the material on dogs.
Posted: 07 Jan 2015 09:29 AM PST
Every several years, workers apply a clay mask to India's iconic but yellowing Taj Mahal to remove layers of grime and reveal the white marble underneath. Now scientists are getting to the bottom of what kinds of pollutants are discoloring one of the world's celebrated wonders. Their findings could help inform efforts to protect the mausoleum and other surfaces from pollution.
Posted: 07 Jan 2015 09:29 AM PST
In the US and many Western countries, people are urged to manage feelings of anger or suffer its ill effects -- but new research with participants from the US and Japan suggests that anger may actually be linked with better, not worse, health in certain cultures.
Posted: 07 Jan 2015 09:29 AM PST
To stay warm when temperatures drop outside, we heat our indoor spaces -- even when no one is in them. But scientists have now developed a novel nanowire coating for clothes that can both generate heat and trap the heat from our bodies better than regular clothes. They now report on their technology, which could help us reduce our reliance on conventional energy sources.
Posted: 07 Jan 2015 09:29 AM PST
The annual US cost of psoriasis, a chronic inflammatory skin condition, was estimated to be between $112 billion and $135 billion in 2013, according to a review article.
Posted: 07 Jan 2015 09:29 AM PST
Women with post-traumatic stress disorder are nearly twice as likely to develop type 2 diabetes compared with women who don't have PTSD, according to new research. The longitudinal cohort study provides the strongest evidence to date of a causal relationship between PTSD and type 2 diabetes.
Posted: 07 Jan 2015 09:29 AM PST
Noninvasive brain scans have led to basic science discoveries about the human brain, but they've had only limited impacts on people's day-to-day lives. A review article highlights a number of recent studies showing that brain imaging can help predict an individual's future learning, criminality, health-related behaviors, and response to drug or behavioral treatments. The technology may offer opportunities to personalize educational and clinical practices.
Posted: 07 Jan 2015 09:25 AM PST
Social attitudes are reinforcing the negative beliefs towards people who self harm, according to research. The first ever study of the life stories of people who self-harm and who were also diagnosed with a personality disorder revealed that several spoke of being refused pain relief while being sutured by hospital staff. Others had met staff who thought they were immune to pain because they self-harmed.
Posted: 07 Jan 2015 09:25 AM PST
Using magnetic levitation to imitate weightlessness, physicists have manufactured solid wax models of splash form tektites. "These wax models provide the first direct experimental validation for numerical models of the equilibrium shapes of spinning droplets. This research is of importance to fundamental physics and also to study of tektite formation," an author said.
Posted: 07 Jan 2015 09:24 AM PST
A sudden jump in the number of lightning strikes inside a garden-variety thunderstorm might soon give forecasters a new tool for predicting severe weather and issuing timely warnings, according to new research. The sudden increase in lightning is one sign a normal storm is rapidly evolving into a supercell, with a large rotating updraft -- or mesocyclone -- at its heart.
Posted: 07 Jan 2015 09:24 AM PST
Following cancer prevention guidelines from the American Cancer Society may modestly reduce your overall risk of developing cancer and have a greater impact on reducing your overall risk of dying early, a study of nearly a half-million Americans has found. Having a healthy body weight and staying active appeared to have the most positive impact.
Posted: 07 Jan 2015 09:24 AM PST
Engineering students are field-testing their foot-powered cell phone charger in rural villages of the Kingdom of Lesotho. The sophomores hope to sell chargers which use ratchet mechanics.
Posted: 07 Jan 2015 09:23 AM PST
The Centers for Disease Control (CDC) reports that flu activity is "high" or "widespread" in 43 states and call it an epidemic this season. Most of the cases are caused by the H3N2 strain.
Posted: 07 Jan 2015 09:23 AM PST
Better physical functioning — basic and complex activities considered essential for maintaining independence — is associated with remission of general anxiety and post-traumatic stress disorder (PTSD) symptoms, a two-year longitudinal study involving 13 intensive care units in four U.S. hospitals has found.
Posted: 07 Jan 2015 09:23 AM PST
Even with modern genomewide analysis techniques, it has proven difficult to identify genetic factors affecting risk for depression, according to a new review article. "Given the established heritability of depression, there is every reason to expect that with larger studies we will be able to identify genetic loci," said one author. "Identifying ways to generate these larger samples is one of the many challenges before us."
Posted: 07 Jan 2015 09:23 AM PST
Researchers have found out how a protein crucial to learning works: by removing a biochemical "clamp" that prevents connections between nerve cells in the brain from growing stronger. The finding moves neuroscientists a step closer to figuring out how learning and memory work, and how problems with them can arise.
Posted: 07 Jan 2015 07:14 AM PST
A novel approach to creating inhalable vaccines using nanoparticles has been uncovered by researchers, showing promise for targeting lung-specific diseases, such as influenza, pneumonia and tuberculosis.
Posted: 07 Jan 2015 07:14 AM PST
Life processes depend fundamentally on phenomena occurring on the membranes separating cells from their environment. Until now poorly understood, the mechanisms responsible for transport through the cell membrane will be able to be studied faster and more cheaply - thanks to a microfluidic system recently developed. The system enables the serial formation of cell membranes and measurement of the processes taking place on them.
Posted: 07 Jan 2015 07:14 AM PST
Since the discovery of how DNA encodes genetic information, most research on the evolution of life has focused on genes. According to the 'selfish gene' theory, cells and organisms exist simply as packages to protect and transmit genes. New research challenges this idea, proposing instead that if anything is 'selfish' it must be the ribosome. That upends everything we think we know about the evolution of life and, in fact, the function of ribosomes themselves.
Posted: 07 Jan 2015 07:14 AM PST
Although it has been shown that a diet high in fat and exposure to certain bacteria can cause atherosclerosis, researchers have for the first time identified distinct gene pathways that are altered by these different stimuli. These findings suggest that future therapies for this disease may need to be individualized.
Posted: 07 Jan 2015 07:11 AM PST
Cool currents from the deep ocean could save tropical corals from lethal heat stress. Researchers observed internal waves preserving corals in the Andaman Sea.
Posted: 07 Jan 2015 07:11 AM PST
In response to high demand for year-round local produce, researchers report they have successfully grown bulbing onions planted in fall for a spring harvest with the aid of inexpensive low tunnels.
Posted: 07 Jan 2015 07:11 AM PST
Researchers have derived a new set of equations that allows for calculating electron paramagnetic resonance (EPR) transition probabilities with arbitrary alignment and polarization of the exciting electromagnetic radiation.