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Latest Brown University Stories

2012-02-16 18:14:40

The evolution of plants and animals generally has been thought to occur through the passing of genes from parent to offspring and genetic modifications that happen along the way. But evolutionary biologists from Brown University and the University of Sheffield have documented another avenue, through the passing of genes from plant to plant between species with only a distant ancestral kinship. How this happened is unclear. But the researchers show that not only did a grouping of grasses...

Weight Loss Can be Contagious
2012-02-16 04:12:52

[ Watch the Video ] Is weight loss “contagious”? According to a new study published online in the journal Obesity, teammates in a team-based weight loss competition significantly influenced each other´s weight loss, suggesting that shedding pounds can have a ripple effect. Researchers from The Miriam Hospital´s Weight Control and Diabetes Research Center and The Warren Alpert Medical School of Brown University found that team members not only achieved similar...

Moderate Air Pollution Linked To Stroke, Cognitive Decline
2012-02-14 06:06:21

Chronic exposure to air pollution, even at levels typically considered safe by federal regulations, increases the risk of stroke by 34 percent and may accelerate cognitive decline in older adults, according to two separate studies published this week in the Archives of Internal Medicine. In one study, researchers studied more than 1,700 stroke patients in the Boston area over a 10-year period, and found exposure to ambient fine particulate matter (PM), generally from vehicle traffic, was...

2012-02-09 00:52:52

Strategy for maximizing uncertain rewards shows in MRI, math models Life shrouds most choices in mystery. Some people inch toward a comfortable enough spot and stick close to that rewarding status quo. Out to dinner, they order the usual. Others consider their options systematically or randomly. But many choose to grapple with the uncertainty head on. "Explorers" order the special because they aren't sure they'll like it. It's a strategy of maximizing rewards by discovering whether as yet...

2012-01-25 13:00:00

Producing a large scale, multi-venue, televised event is a huge challenge and certainly not an exact science. Flexibility, quality, dependability and diligence are necessary to pull it off. Brown United, an LA, CA based company specializing in temporary and permanent event construction, has a proven track record with companies such as AEG (Coachella/Stagecoach), for whom they are counted on year after year. Los Angeles, CA (PRWEB) January 25, 2012 It takes several days and thousands of man...

New Research Shows Feathered Dinosaur Could Fly
2012-01-25 06:22:05

[ Watch the Video ] An international team of researchers led by Brown University has shed some new light on whether the winged dinosaur Archaeopteryx could fly. The team has determined that a well-preserved feather on the raven-sized dinosaur's wing was black, which is evidence that the feathers had traits that could help Archaeopteryx fly. Also, the researchers determined that the fossilized feather's structure is identical to living birds, according to the research published in the...

Device Measures Glucose In Saliva
2012-01-24 05:11:32

Engineers at Brown University have designed a biological device that can measure glucose concentrations in human saliva. The technique could eliminate the need for diabetics to draw blood to check their glucose levels. The biochip uses plasmonic interferometers and could be used to measure a range of biological and environmental substances. Results are published in Nano Letters. For the 26 million Americans with diabetes, drawing blood is the most prevalent way to check glucose levels. It...

Many High-risk Americans Don’t Get Hepatitis B Vaccine
2012-01-20 04:41:15

A recently published study investigating hepatitis B vaccination rates in the United States found that more than half of adults at risk for hepatitis B virus remain unvaccinated. With many of these individuals making contact with the healthcare system, including HIV testing, this statistic reflects many missed opportunities to vaccinate this population. Although there is an effective vaccine for hepatitis B and public health officials have a strong sense of who is at highest risk for the...

Mammalian Evolution Mirrors Climate Change
2011-12-27 05:39:51

A recent study by an international group of evolutionary biologists has pointed to six broad yet distinct ℠waves´ of climate-induced mammalian diversity in the last 65 million years of evolution. Researchers say that extended periods of warming and cooling appear to signal the shift from one dominant grouping of mammals to the next. In the online version of the journal The Proceedings of the National Academy of Sciences (PNAS), Professor Christine Janis of Brown University and a...

2011-12-07 11:20:15

Primates learn from feedback that surprises them, and in a recent investigation of how that happens, neurosurgeons have learned something new. The insight they gleaned from examining the response of specific brain tissues during a learning task may inform future rehabilitative therapies after stroke or traumatic brain injury. "It's been known for a long time that it's unexpected events in particular that drive learning," said Wael Asaad, assistant professor of neurosurgery in the Warren...