Word: flowing
(lookup in dictionary)
(lookup stats)
Dates: all
Sort By: most recent first
(reverse)
Donald Sada, an ecologist at the Desert Research Institute in Reno, Nev., is also concerned. A slight decrease in the flow of groundwater will probably not be detrimental to the pockets of water that dot Western deserts, he says. The problem is, "What's slight? At what point do we start to alter the functional ecology?" The loss of the diminutive snails, fish and other organisms that dwell in desert springs would be important to more than just ecologists and taxonomists. Those tiny animals are indicator species, the canaries in the environmental coal mine that provide the first warning that...
...million nuclear perfusion scans, which use mildly radioactive tracer molecules to measure how well the cardiac muscle is nourished. Improvements in computer processing power and software have made these tests more reliable and more conclusive than ever before. Stress tests, which help doctors detect ischemia, or lack of blood flow to the cardiac muscle, can be performed using either echocardiograms or nuclear scans. "Echocardiograms and nuclear perfusion scanning are the bread and butter of cardiac care," says Dr. Pamela Douglas, chief of cardiovascular medicine at Duke University Medical Center in Durham, N.C., and president of the American College of Cardiology...
...latest advances in scanning could backfire, moreover, if they lead to lots of unnecessary surgery. Not every blockage reduces blood flow. Sometimes the other blood vessels that nourish the heart can take up the slack--a situation that's more common than you might think. "We still don't know what to do with patients who have a number of moderate narrowings but no ischemia," says Dr. Roger Blumenthal of Johns Hopkins. "There are no data showing that taking them to the cath lab for stenting or angioplasty affects their outcome...
That's a question that could have a more authoritative answer in three years, when a team of federal and state hydrologists and geologists completes a large study of groundwater flow through the targeted region. By itself, collecting better data will not resolve the current conflict, but it's a start. The more scientists learn about Nevada's aquifer system, the more accurately they can model potential effects, and the more confidence the public in that state and elsewhere will have in the decisions the government agencies make. "When the water is gone, the future is gone," observes rancher Dean...
...write pretty much a 9 to 5 day, Monday through Friday. Saturday and Sunday, I try to get a couple hours in each day, just so that I don't lose the flow, and have to have a cold start...