Tag: "pressure" at biology news
Duke Researchers Discover Central Role Of Nitric Oxide In Hemoglobin Action
...carbon dioxide while keeping vessels openand blood pressure
steady. Scientists say the discovery, de..." NO is exchanged for another "protected"NO. Blood pressure
remains constant and blood flow maintained in order topromote oxygen transport. Hemoglobin detects h...
Core Spins Faster Than Earth, Scientists Find
...equator.The scientists theorized that the enormous pressure
in the Earth'score, which is millions of times higher at the inner core surfacethan the atmospheric pressure
at the Earth's surface, has alignediron atoms in a distinctive crystalline structure that slows down...
Low-Protein Diet May Reverse Kidney Disease
...y result from diabetes mellitus, severe high blood pressure
or other causes and often leads to the need for dialysis or transplantation. Previous Hopkins studies have shown that a very low protein diet before dialysis may prolong the lives of some kidney failure patients after they start dialysis and may post...
Asian Beetle, New In This Country, Threatens Brooklyn's Shade Trees
...oesn't bode well for a tree that is under a lot of pressure
to grow." New York City's Department of Parks and ...r system in an area where trees are under enormous pressure
to grow, said Nina Bassuk, Cornell professor of floriculture and ornamental horticulture in Ithaca. ...
Duke Primate Center Sets October Expedition To Find 'Juliet'
...6 species of giant lemurs that are nowextinct. The pressure
of human population increase on the island republicoff Africa's east coast now threatens many extant species. The precarioussituation demands widespread help for the rescue efforts made by Duke'sPrimate Center and conservation agencies in Madagascar,...
'Juliet' Evades Primate Center Expedition
...6 species of giant lemurs that are nowextinct. The pressure
of human population increase on the island republicoff Africa's east coast now threatens many extant species....
Sea Turtles Have Favorite Oceanic Routes
...lite transmitters designed to survive the crushing pressure
of the ocean's deep water and buoyant enough to transmit a signal when a turtle reached the water's surface. Attaching the transmitters to the turtles was not easy: the pliable, yet oily carapace -- the sea turtle's shell -- made attaching the tethe...
Twin Study May Ease Parents' Concerns About Late Talkers, Underscores Impact Of Environment On Language Development
...uations with higher than averageheart rates, blood pressure
and muscle tension as well as greater pupildilation and higher levels of norepinephrine, a brain chemical producedduring stress. Twin studies are uniquely useful for sorting out the complexinteraction of environment and genetics in language...
A Phoenix From A Ring Of Fire Is A Pattern For The Recovery Of Mount St. Helens
... away in central Australia. The tsunami (or marine pressure
wave) generated was a wall of water seven stories high that destroyed more than 160 towns and villages. The airwaves from the blast made four journeys around the globe, and a great belt of ash encircled the Earth. Two-thirds, or about 25 square m...
A Drug Pump On A Computer Chip
...tromechanical systems. Ten-dollar disposable blood pressure
instruments with microscopic pressure
sensors are replacing conventional $600 devices that, while reusable, cost another $50 to sterilize ...
Pets Provide Physiological Benefits For Women Living Alone
...nds can help prevent the age-related rise in blood pressure
that can increase the risk of stroke and heart att...friend may be nearly as effective in keeping blood pressure
down as the two-legged variety. "The bottom line is, we have demonstrated that elderly women...
UW Smogmobile Offers Cleaner, Safer Alternative To Gas Or Electric Cars
...an Diego. The smogmobile is powered by energy from pressure
built up when super-cooled liquid nitrogen is heat...n vehicle. Researchers have known for decades that pressure
built up when super-cooled liquid nitrogen is converted to a gas could power a car. But the UW group...
Early Menarche Puts Young Girls In Peril
...ertility and how these trends exert "excruciating pressure
on those body parts that the world can see." Brumberg then presents a social history of acne, pointing out how skin care was the first of many different body investments made by middle-class parents to achieve a new ideal of physical perfection in ...
Basin Traps Air Pollution In Mexico City: International Study Has Implications For U.S. Cities
...es --balloons with sensors to measure temperature, pressure
and humidity -- into theatmosphere five times a day beginning at 8 a.m. Each site also used radar windprofilers, which can measure wind up to four kilometers above the ground.Another tool, called SODAR, provided high resolution measurements of wind ...
Hunt For Early Heart Attack Genes Begins
...rdisease, which includes heart attacks, high blood pressure
and stroke, accordingto the AHA. Heart attacks, which claimed more than 487,000 lives in 1994, causeone in every 4.7 American deaths. People younger than 65 account for 45 percentof heart attacks. "We have good evidence that heart disease, ...
New Way To Drive Chemical Reactions: Collision Of Liquids At High Speed
... gemstones. "Only gems are hard enough to takethe pressure
without cracking or eroding," Suslick said. Curre... temperature of about 9,000 degrees Fahrenheit,the pressure
of about 1,000 atmospheres and the duration of about a billionthof a second." Any turbulent flow ca...
Purdue Study Finds Prehistoric Couch Potato
...effort. "This suggests that there was some kind of pressure
on these dinosaurs to become more aerobically acti...red ambushing, factors that could have reduced the pressure
to become more active. "Whatever the reason, the fact that they eventually did catch up with the nor...
Limits Of Life On Earth: Are They The Key To Life On Other Planets?
...rophilic (high-pressure-loving) life forms, or the pressure
boundaries within which life may exist. Douglas Bartlett of the Scripps Institution of Oceanography in La Jolla, California, will conduct research on genetic components associated with survival in high-pressure conditions. In his studies, Bartlett ...
First Selenium-Based Orally-Active Antihypertensive May Lead To New Family Of Therapeutic Agents
...ity of selenium and the availabilityof other blood pressure
medications halted further development untilrecent...ed that theselenium-based compounds decrease blood pressure
and increase bloodvelocity without increasing heart rate in the experimental animals. Finally, indu...
Genetic Risk Factors For Anorexia Nervosa Sought
Modern society puts powerful pressure
on women to control body weight,penalizing obesity and rewarding thinness in myriad ways. For this reason, someobservers say, women suffer from anorexia nervosa -- a disorder in which victimsstarve themselves, sometimes to death -- at rates 10 times ...
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