Tag: "irregular" at biology news

Detective Work Uncovers New Tick-Borne Disease In North Carolina And The Southeast

...s sported by camperswere slightly smaller and more irregular in shape compared to the Lyme diseaserash. And they seemed to follow the bite of the Star tick, which has neverbeen associated with Lyme disease. And none of the 14 campers with the rashshowed any laboratory evidence of infection with the spirochete ...

Motivating Muscles: New UD Study Might Help People With Paralysis 'Stay Strong Longer'

...example, is a now-commonstrategy for correcting an irregular heartbeat. In addition, Binder-Macleodsays, "physical therapists use electrical stimulation to improve the performanceof muscles in people with central-nervous-system problems--such as a foot thatdrags following a stroke. You can put on an ankle brac...

New Machine Slashes Time, Cost To Make Unique Lenses

...e quality andresolution. But aspheres' subtly irregular curves make them a real choreto produce. Most of today's manufacturers use a process Golinidescribes as "home-grown," rigging up expensive machines likehigh-precision lathes for double-duty as asphere grinders. Thefinal painstaking round of hand-smoo...

Irregular Heartbeat Shown To Increase Risk Of Death As Well As Disability; Particularly Harmful To Women

...tria, theheart's upper two chambers. It causes an irregular heartbeat that results inthe heart pumping blood less effectively. About 2 million Americans have AF,according to an editorial in Circulation: Journal of the American HeartAssociation by J. Thomas Bigger Jr., M.D., professor of medicine and ofpharma...

Staring And Squirming Help Babies Explore

...r and development: "The fact that thesecycles are irregular may be ensuring a diversity of behaviors that allowsinfants a greater adaptation to their environment. In other words, variation isa source of potential solutions to adaptive challenges." Robertson runs an infant laboratory at Cornell where, for his...

How Nature Harvests Sunlight

... his model protein shows how "natureuses some very irregular forms to create something beautiful." But, he said: "I'm not saying that with this model we can cure Alzheimer's. There are manysteps in understanding various biological systems. This model shows thestructure of a protein in one of the purest, simp...

Scientists Use Bioengineering To Buy Time For Ailing Hearts

...serious side effects such aslow blood pressure and irregular heartbeats. The development of a bioengineeringapproach to keep the ductus open could lead to a more effective and safe way tohelp infants with serious heart problems survive. "The next step in the research will be to develop a method for delivering ...

Revealing the complex patterns of cardiac disease

...dication to eliminate variability forpatients with irregular heartbeats. "This could be doing as much harm as good,"says Professor H. Eugene Stanley, director of the Center for Polymer Studies. Monofractals occur commonly in nature and have long been observed inphysiological systems. A fern, for example, is fr...

New UNC-CH study explains variations in onset of ice ages

... occurs but over a much longer span. The seemingly irregular durations fromone ice age to the next eventually can be predicted if one takes into accountastronomical events such as changes in the orbit's shape, the earth's tilting onits axis and the gravitational effects of other planets. "Understanding...

Your heart is being closely watched while you're asleep

...ow know that the heartbeat is far more complex and irregular than once supposed (NewScientist, 3 January 1998, p 20). The signals that control a healthy heartbeat contain many differentfrequency components, and this leads to a highly complex pattern of intervals between beats. The gaps between heartbeats are ...

Hopkins researchers identify neurologic problem associated with motor disorders in Huntington's disease

...vements often begin normally, but become jerky and irregular at some point during their course because of impaired error feedback. "This study is very important because it gives us a marker of motor abnormalities in those with the HD mutation before they become clinically affected," Ross said. "We ...

Researchers link genetic defect to 'head-rush' disorder

...w extreme fluctuations in blood pressure can cause irregular heart rhythms. Since the norepinephrine transporter system is the target site for a number of drugs, including tricyclic antidepressants and amphetamines, this finding may also lead to new insights into the mechanisms of these drugs," said Dr. Claud...

Urbana researcher receives national award

...f jigsaw puzzle pieces. Even though the shapes are irregular and they don't repeat, they do fit and stay together." Wolynes is applying this mathematical insight to another problem: how new proteins fold themselves into precise, three-dimensional shapes. Researchers know proteins need particular shapes to func...

Mighty things from small beginnings

...t the site of blood-vessel damage, swell into odd, irregular shapes, grow sticky and clog at the cut, thereby creating a plug. Under abnormal circumstances, such as coronary artery disease, a blood clot occurs within a blood vessel and obstructs the normal flow of blood, leading to a heart attack. . The inab...

UC Irvine molecular biologists discover key protein interaction that stabilizes cholesterol levels in cells

...ctivity to balance these levels in people who have irregular amounts of cholesterol in their blood. Although cholesterol is important for maintaining cell structure and rigidity, high levels of certain types of cholesterol are significant contributing factors to heart disease and stroke, two of the leading ca...

More tolerable treatment for severe, obstructive sleep apnea around the world

...for example, and is associated with irregular heartbeat, high blood pressure, heart attack, and stroke....

Heart failure patients with worst heart function are good candidates for pacemakers

...sed to fix electrical abnormalities in people with irregular heart rhythms, it is now in favor for heart failure patients as a way to "resynchronize" a weak and struggling heart. In a study of 22 patients, Johns Hopkins researchers have found that those whose hearts have the largest amount of timing discord, a...

Microscopic bone evidence supports dinosaur-bird evolution link

...h the same way that rebar binds concrete - have an irregular structure in both birds and coelurosaurs. The layers are thicker in some places and much thinner in others, and often they disappear completely before reforming. In modern vertebrates, this type of structure only occurs in bone that forms very rapidl...

Foods puffed up with air can aid weight management

...tter - add low-fat seasoning instead.) Foods with irregular shapes also produce a bigger volume in a given portion because they don't pack down. Think of flaky or puffed cereals. In other words: Think big," they add. "Volumetrics" is full of other suggestions, based on Rolls's research, for decreasing cal...

Science: Prion proteins may signal trouble -- literally

...e of the international journal, Science. While irregular prions are the known culprits behind incurable "spongey-brain" diseases, or transmissible spongiform encephalopathies (TSEs), the purpose of normal prions has remained mysterious until recently. According to research teams directed by Odile Keller...

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