Tag: "beats" at biology news
Slowing the racing heart
...the human heart, one cell -- the pacemaker cell -- beats
faster or slower to induce a rhythmic heartbeat that varies to increase or decrease the blood flow to the body as we eat, sleep or exercise. "Disturbances of pacemaker control are common in heart diseases. When the heartbeat becomes non-rhythmic a...
Bat flight generates complex aerodynamic tracks
...easurements of aerodynamic performance in the wing beats
of a small species of bat. "Bats with a body mass of 10 30 grams or about the weight of one or two teaspoons of sugar and tip-to-tip wing spans of 25 30 centimeters about the length of a human hand generate very different wakes," he reported...
UD scientist wins NSF career award for tissue engineering research
...y areas of the human body--the heart, for example, beats
an average of 70 times a minute when you are resting, and the vocal folds vibrate more than 100 times a second when you are speaking. "To repair damaged vocal folds, we need 'filler' or scaffold material that's very soft, but very strong. It's very...
A case of mistaken identity for the ivory-billed woodpecker?
...ings were thought to beat more slowly that the 8.6 beats
per second captured on Luneau's video, and its win... video footage showed that its wings did reach 8.6 beats
per second during an escape flight. He also found that as Pileated Woodpeckers fly away from the cam...
Fruit flies may pave way to new treatments for age-related heart disease
...hibited prolonged heart contractions and irregular beats
seen usually in older flies (and older people). To enable their study of the fly heart, the researchers created new methods to dissect the hearts, and quantify heart contractility and other functions by using a movie camera to capture flys cardiac ac...
Rats on a road trip reveal pollution-heart disease risk
... Results showed a maximum drop in heart rate of 40 beats
per minute, or a 10 percent decline. The effect persisted for up to 14 hours. In addition, researchers found a 70 percent decrease in the vagosympathetic balance, which is an index of heart rate variability and how the autonomic nervous system respon...
On the golf tee or pitcher's mound, brain dooms motion to inconsistency
...ing, before the movement even began. Flexibility beats
consistency For athletes, the inability to replicate the perfect movement might seem to be a frustrating problem that needs to be solved. But the researchers speculate that the brain has evolved its apparently improvisational style precisely becaus...
'Sewer gas' induces suspended animation without decreasing blood pressure
...ce and found their: heart rate fell from 500 beats
per minute to 200 beats
per minute respiration rate decreased from 120 breaths to 25 breaths per minute core body temperatur...
Closing in on lethal heart rhythm in young athletes
... in the heart's right ventricle, causing irregular beats
and - unless diagnosed and treated with drugs or implanted defibrillators - triggering a fatal heart rhythm disturbance. Judge, an assistant professor at The Johns Hopkins University School of Medicine and its Heart Institute, says DSG2 mutations a...
UC Davis researchers move biotechnology closer to replacing electronic pacemakers
...y, including average heart rates of about 70 to 80 beats
per minute, are similar to humans. In the current study, researchers used radiofrequency ablation to remove the SA nodes in pigs' hearts. This is the same minimally invasive technique cardiologists use in clinics to destroy the heart cells that ca...
JCI table of contents: July 20, 2006
... ONCOLOGY Tackling tumor-associated macrophages beats
breast and other cancers in mice Tumor-associated macrophages (TAMs) can promote the growth and spread of tumor cells. In a study appearing online on July 20 in advance of print publication in the August issue of the Journal of Clinical Investigat...
Engineering electrically conducting tissue for the heart
...tricles causing them to contract. In this way, the beats
of the atria and ventricles are synchronized. Investigators led by Douglas Cowan, PhD, a cell biologist in Children's Department of Anesthesiology, Perioperative and Pain Medicine, wanted to create a biological substitute for the AV node that would w...
Mice with glowing hearts shed light on how hearts develop
...force of heart contractions. Since the mouse heart beats
approximately 6 to 10 times per second, imaging re...m on top and a ventricle on the bottom. A delay in beats
between the two gives the atrium time to contract and push blood through the heart, but the mechanis...
Unified physics theory explains animals' running, flying and swimming
...as well as the frequency and force of the strides, beats
or undulations that propel their bodies forward. "Running, swimming and flying occur in vastly different physical environments and, likewise, involve quite different body mechanics," Bejan said of the new application of constructal law. "Nonetheless...
Scientists lift malaria's cloak of invisibility
...an said. "New forms come up, and the immune system beats
them down again. Because of this a lot of people think you need five years of constant exposure to malaria in its different disguises to gain immunity." Many children do not survive malaria long enough to develop immunity. And without continuous exp...
Researchers figure out how hearts fail
...en that it takes in. And it's not unreasonable--it beats
24 hours a day," Lopaschuk said....
Ultra-fast camera captures how hummingbirds hover
...oseconds as the bird hovered at a feeder. The wing beats
caused the air to circulate, which in turn caused ...or their ability to drop their heart rate from 500 beats
per minute during the day to 40 beats
per minute at night." Hawkins commented that it was logical, b...
Patients undergoing PET/CT may want to pass on that cup of coffee, according to SNMTS study
...at the same thing happens with caffeine: The heart beats
faster when you drink coffee, just as it does when you exercise. Patients who had coffee before their scans had a "significantly higher" myocardial uptake than those with low or no caffeine intake, said Osman. Even average caffeine consumption "may d...
Long thought extinct, ivory-billed woodpecker rediscovered in Big Woods of Arkansas
...g 1.2 seconds of flight, the video reveals 11 wing beats
showing extensive white on the trailing edges of the wings and white on the back. Both of these features distinguish the ivory-billed woodpecker from the superficially similar, and much more common, pileated woodpecker. On three occasions, members o...
Body's biological clock found to affect cardiac rhythm patterns in healthy adults
... that is, the fluctuations found in a window of 10 beats
will be statistically similar to those found in a heartbeat interval of 100 beats
and or one of 1000 beats. "These studies have demonstrated that this self-similar structure in the...