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Fri, 21 Nov 2014 19:21:52 EST
How the hummingbird achieves its aerobatic feats
Although hummingbirds are much larger and stir up the air more violently as they move, the way that they fly is more closely related to flying insects than it is to other birds. Now, the most detailed, three-dimensional aerodynamic simulation of hummingbird flight conducted to date has definitively demonstrated that the hummingbird achieves its nimble aerobatic abilities through a unique set of aerodynamic forces that are more closely aligned to those found in flying insects than to other birds.
Fri, 21 Nov 2014 14:12:28 EST
Anti-HIV medicines can cause damage to fetal hearts, research shows
New research raises concern about potential long-term harmful impact of 'antiretroviral therapy' on in-utero infants whose mothers are HIV-positive, but who are not infected with HIV themselves. The study shows that while the HIV medications have been successful in helping to prevent the transmission of the virus from mother to infant, they are associated with persistently impaired development of heart muscle and reduced heart performance in non-HIV-infected children whose mothers received the medicines years earlier.
Fri, 21 Nov 2014 14:12:22 EST
In landmark study of cell therapy for heart attack, more cells make a difference
Physicians from 60 sites treated 161 heart attack patients with their own bone marrow cells, selected for their healing potential and then reinjected into the heart, in an effort to improve the heart's recovery. Their conclusion? Patients who receive more cells get significant benefits.
Fri, 21 Nov 2014 14:12:20 EST
Digoxin associated with higher risk of death, hospitalization, study shows
Digoxin, a drug commonly used to treat heart conditions, was associated with a 71 percent higher risk of death and a 63 percent higher risk of hospitalization among adults with diagnosed atrial fibrillation and no evidence of heart failure, according to a study.
Fri, 21 Nov 2014 14:11:17 EST
'Mind the gap' between atomically thin materials
For the first time, researchers have grown a single atomic layer of tungsten diselenide on a one- atom-thick substrate of graphene with pristine interfaces between the two layers using an industrially scalable technique.
Fri, 21 Nov 2014 12:12:32 EST
Next-door leopards: First GPS-collar study reveals how leopards live with people
In the first-ever GPS-based study of leopards in India, biologists have delved into the secret lives of these big cats, and recorded their strategies to thrive in human-dominated areas.
Fri, 21 Nov 2014 12:11:39 EST
Fluorescent nanoprobe could become a universal, noninvasive method to identify and monitor tumors
Researchers have developed a hybrid metal-polymer nanoparticle that lights up in the acidic environment surrounding tumor cells. Nonspecific probes that can identify any kind of tumor are extremely useful for monitoring the location and spread of cancer and the effects of treatment, as well as aiding initial diagnosis.
Fri, 21 Nov 2014 11:18:47 EST
Marker polyps do not cause cancer, experts say
Although serrated polyps usually are associated with colorectal cancer, it turns out that such polyps are themselves not dangerous, according to a study.
Fri, 21 Nov 2014 11:18:36 EST
Streamlining thin film processing for electrodes, display screens
Energy storage devices and computer screens may seem worlds apart, but they’re not. When an electrical engineering professor teamed up with and computer scientists to make a less expensive supercapacitor for storing renewable energy, they developed a new plasma technology that will streamline the production of display screens.
Fri, 21 Nov 2014 10:29:22 EST
Nail stem cells prove more versatile than press-ons
There are plenty of body parts that don't grow back when you lose them. Nails are an exception, and a new study reveals some of the reasons why. A team of researchers has identified a new population of nail stem cells, which have the ability to either self-renew or undergo specialization or differentiation into multiple tissues.
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