PHILADELPHIA - Male infertility is a common medical problem, affecting millions of men in the United States annually. Its causes include an inability to make productive sperm. Now, using yeast as a model organism, researchers at the University of Pennsylvania School of Medicine are beginning to identify the molecular signals that could in part underlie that problem.
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A new study of the High Arctic climate roughly 50 million years ago led by the University of Colorado at Boulder helps to explain how ancient alligators and giant tortoises were able to thrive on Ellesmere Island well above the Arctic Circle, even as they endured six months of darkness each year.
OAK BROOK, Ill. – Why is it that some people lose weight and body fat when they exercise and eat less and others don't? German researchers say MRI and magnetic resonance (MR) spectroscopy can provide the answer — and help predict who will benefit from lifestyle changes. Results of the study are published online and will appear in the November issue of the journal Radiology.
Scientists at the University of Oregon have determined the fine-scale genetic structure of the first animal to show an evolutionary response to rapid climate change.
They used a high-throughput sequencing technique called Restriction-site Associated DNA (RAD) tagging to make the discovery.
ALBUQUERQUE, N.M.— Solid-state lighting pioneers long have held that replacing the inefficient Edison light bulb with more efficient solid-state light-emitting devices (LEDs) would lower electrical usage worldwide, not only "greenly" decreasing the need for new power plants but even permitting some to be decommissioned.
But, in a paper published Thursday in the Journal of Physics D, leading LED researchers from Sandia National Laboratories argue for a shift in that view.
What happens when the products you love become labeled as "trendy" or"hipster"? Consumers who identify with these products find creative ways to remain loyal and elude derision, according to a new study in the Journal of Consumer Research.
In order to be competitive, companies can go overboard in trying to come up with creative designs for the loyalty reward programs. According to a new study in the Journal of Consumer Research, some of these designs can lead to unintended consequences.
Using a $225,000 microscope, researchers have identified the key components of a protein called TRIM5α that destroys HIV in rhesus monkeys.
The finding could lead to new TRIM5α-based treatments that would knock out HIV in humans, said senior researcher Edward M. Campbell, PhD, of Loyola University Health System.
Campbell and colleagues report their findings in an article featured on the cover of the Sept. 15, 2010 issue of the journal Virology, now available online.
When it comes to our own pleasure, we like having a choice, but when it comes to utilitarian goals, we're just as happy being told what to do, according to a new study in the Journal of Consumer Research.
If you think that your favorite coffee shop is a great gathering place for discussion, you should have been around in the Ottoman Empire starting in the 1550s. A new study in the Journal of Consumer Research examines the role of coffee houses in the evolution of the consumer.
Authors Eminegül Karababa (University of Exeter, Exeter, UK) and Güliz Ger (Bilkent University, Ankara, Turkey) dug wide and deep into the history of coffeehouses in the early modern Ottoman Empire and found they offered their patrons a lot more than coffee.
GAINESVILLE, Fla. — A new University of Florida study indicates extinct carnivorous mammals shrank in size during a global warming event that occurred 55 million years ago.
The study, scheduled to appear in the December print edition of the Journal of Mammalian Evolution and now available online, describes a new species that evolved to half the size of its ancestors during this period of global warming.
A poster of the Galton-Darwin-Wedgwood pedigree was prepared by Harry Hamilton Laughlin, Director of the Eugenics Record Office of the Carnegie Institute, and exhibited at the Third International Congress of Eugenics in 1932 at the American Museum of Natural History.
A photograph of this poster has been discovered in the archives of Truman State University in Kirksville, Missouri alongside a photograph of a poster of a collection of rare Darwin family photographs, assembled by Leonard Darwin. The original posters have not been located.
Emergency room waiting times could be cut by over one third and patients' length of stay by almost two-thirds, thanks to a new approach to the triage process of sorting patients for further assessment and treatment, according to research published in the International Journal of Six Sigma and Competitive Advantage this month.
Nabeel Mandahawi of The Hashemite University in Zarqa, Jordan and colleagues have turned to a design strategy known as Six Sigma commonly used by engineers and manufacturers to improve their products, reduce costs and boost energy efficiency.