An international collaboration led by a University of Pennsylvania anthropologist has shown that environmental factors, like temperature and light, play as much of a role in the activity of traditionally nocturnal monkeys as the circadian rhythm that regulates periods of sleep and wakefulness.
One of the big, unsolved problems in explaining how life arose on Earth is a chicken-and-egg paradox: How could the basic biochemicals—such as amino acids and nucleotides—have arisen before the biological catalysts (proteins or ribozymes) existed to carry out their formation?
NASA satellites and the International Space Station are keeping eyes on Hurricane Earl as it heads for New England. Watches and Warnings are posted in the U.S. northeast.
Phosphorus, a mineral element found in rocks and bone, is a critical ingredient in fertilizers, pesticides, detergents and other industrial and household chemicals. Once phosphorus is mined from rocks, getting it into these products is hazardous and expensive, and chemists have been trying to streamline the process for decades.
Phosphorus, a mineral element found in rocks and bone, is a critical ingredient in fertilizers, pesticides, detergents and other industrial and household chemicals. Once phosphorus is mined from rocks, getting it into these products is hazardous and expensive, and chemists have been trying to streamline the process for decades.
The modern world -- with its ubiquitous electronic devices and electrical power -- can trace its lineage directly to the discovery, less than two centuries ago, of the link between electricity and magnetism. But while engineers have harnessed electromagnetic forces on a global scale, physicists still struggle to describe the dance between electrons that creates magnetic fields.
While vultures across Asia teeter on the brink of extinction, the vultures of Cambodia are increasing in number, providing a beacon of hope for these threatened scavengers, according to the Wildlife Conservation Society (WCS) and other members of the Cambodia Vulture Conservation Project.
Researchers at Queen's University have found that people with Parkinson's disease can perform automated tasks better than people without the disease, but have significant difficulty switching from easy to hard tasks. The findings are a step towards understanding the aspects of the illness that affect the brain's ability to function on a cognitive level.
Only about one in every six Americans who have ever been overweight or obese loses weight and maintains that loss, according to Penn State College of Medicine researchers.
One mention of E. coli conjures images of sickness and food poisoning, but the malevolent bacteria may also be the key to the future of renewable energy.
The first clinical trials on a new investigational drug being developed to treat infections caused by Hepatitis C virus have been successfully completed.
Global agricultural expansion cut a wide swath through tropical forests during the 1980s and 1990s. Over half a million square miles of new farmland – an area roughly the size of Alaska – was created in the developing world between 1980 and 2000, of which over 80 percent was carved out of tropical forests, according to Stanford researcher Holly Gibbs.
Graphene, a one-atom-thick layer of graphitic carbon, has great potential to make electronic devices such as radios, computers and phones faster and smaller. But its unique properties have also led to difficulties in integrating the material into such devices.
Graphene, a one-atom-thick layer of graphitic carbon, has great potential to make electronic devices such as radios, computers and phones faster and smaller. But its unique properties have also led to difficulties in integrating the material into such devices.
Researchers at The University of Western Ontario have provided the first direct evidence using a biological marker, to show chronic stress plays an important role in heart attacks. Stressors such as job, marital and financial problems have been linked to the increased risk for developing cardiovascular disease including heart attack. But there hasn't been a biological marker to measure chronic stress. Drs. Gideon Koren and Stan Van Uum developed a method to measure cortisol levels in hair providing an accurate assessment of stress levels in the months prior to an acute event such as a heart attack. The research is published on-line in the journal Stress.
Individuals who received a non-kidney organ transplant in the past may be more likely to be listed for a kidney transplant prior to initiation of dialysis (pre-emptive listing) than other candidates, according to a study appearing in an upcoming issue of the Clinical Journal of the American Society Nephrology (CJASN). The results indicate that the growth in the numbers of this group of kidney transplant candidates adds to the list of organ allocation challenges.
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