Tag: "muscles" at biology news

Florida scientists find enzyme replacement restores muscle strength in mice with Pompe's disease

...1001 over a two-week period, after which their leg muscles were just as strong as the leg muscles of healthy mice. Researchers tested strength by electrically stimulating isolated muscles. Because o...

Fly on a treadmill demonstrates super directional hearing

...ressure between the two ears and signals the fly's muscles to respond to the sound source. With human ears about 6 inches apart, we have about 10 microseconds to make the same calculation that the Ormia fly, with its half-millimeter head, makes in about 50 nanoseconds -- a thousand times faster. Trying ...

Measuring the muscle: new study by Scripps researchers depicts how the tuna's body is built for speed

...s a tantalizing puzzle in animal physiology. These muscles are the fundamental sources that fish use to power...the connective tissue architecture in tunas allows muscles to focus their action further down the body," said Shadwick, a professor in Scrippss Marine Biology ...

Researchers study muscle cell damage that occurs when astronauts return from space

...arth. But much like a punctured tire is patched, muscles cells literally ripped apart by use after even a w... a couch potato. When astronauts return and reload muscles B particularly with activities, such as walking down stairs or down a hill, that simultaneously stre...

UC San Francisco patents method for delivering normal genes in a pill

...d and which patients now receive by injection into muscles - including insulin, growth hormones, blood factors for treating hemophilia, and erythropoietin for treating anemia. Rothman expressed confidence that future patent awards to UCSF would cover development of the method for many illnesses. Genteric, a ...

Scientific explanation for success of klapskate

...arge lever which is difficult for the skaters calf muscles to set in motion. The position of the hinge of the...ver. When a skater is wearing klapskates, his calf muscles can in a sense switch to a lower gear. This makes his movements more effective, leading to the push-...

Flyman, MD

...l gyros, the most complex visual system known, and muscles so powerful they can instantly lift twice their own body weight. So, scientists are willing to put up with a little petulance in order to study them. Were talking fruit flies here. Drosophila melanogaster. And what we want to know is how they ...

Device liberates quadriplegic from ventilator

... 20 years of research in electrical stimulation of muscles in the laboratory of Thomas Mortimer, professor of biomedical engineering at CWRU. Mortimer and his colleagues also developed computer software to map the nerves in the diaphragm, essential to putting the electrodes in the correct spots. The device ...

Scientists find solution to a mystery surrounding Alzheimers, Huntington's and other neurological diseases

... was a spectacular athlete who lost the use of his muscles in the prime of life and ended up paralyzed. If it turns out that aggregate proteins are the toxic agents that kill cells, then one treatment would be to dissolve the aggregates or prevent them from forming, notes Kopito. Our study shows that a cell...

Gulp! URI professor studies how sharks eat

...t it captures its prey. She also monitors up to 12 muscles with electrodes as thin as a piece of hair to determine which muscles are used, a process called electromyography. Wilga also researches how sharks swim. "The old theory ...

Vitamin deficiency may exacerbate motor neuron disease

...or muscle groups. Loss of nerve stimulation causes muscles to atrophy and can result paralysis. In their studies, Dreyfuss and his colleagues probed how SMN binds to its multiple target proteins in the cell. Using biochemical methods, they determined that SMN binds to regions of target proteins that a...

Ancient reptile is efficient chewer

...omically, both Suminia and the dicynodonts had jaw muscles and jaw joints that supported a sliding motion. However, since the keratinous beaks of dicynodonts did not survive in the fossil record, there was no way to firmly establish efficient oral processing in those animals. Suminia did have teeth that are ...

Gene that directs fate of many embryonic stem cells identified

...oderm -- source material for the heart, kidney and muscles in all organisms -- were "transfated" into endoderm - the source for an entirely different set of tissues. When just-fertilized embryos were injected with the cas gene, 100 percent of the embryonic stem cells that normally form mesoderm instead gave ...

Austrian scientists identify gene involved in recurrent miscarriages

...already known to influence the way vascular smooth muscles behave. Given also the role that nitric oxide deficiency plays in high blood pressure, haemorrhage, vascular spasms and infarction, it's reasonable to speculate that carriers of an NOS3 polymorphism are at increased risk for impaired placental functi...

Israeli teams grows heart cells and insulin producing cells from human embryonic stem cells

...nd to hormones like adrenaline, which causes heart muscles to contract faster." The cells passed all the tests with flying colors, demonstrating that they are indeed early-stage cardiomyocytes. It seems likely that if placed in an adult human heart, these cells would produce mature human heart muscle cells...

Shifting liquid crystals may serve as personal, portable chemical sensors, Science researchers report

...the liquid crystal. In effect, the target chemical muscles in on the liquid crystal's territory, shoving it away from the receptors. This displaces the liquid crystal into a new orientation that is controlled by the underlying surface texture, and the new orientation is visible to the naked eye as a change i...

Plastic tube may help treat paralysis

... helps to maintain flexibility and function of the muscles and joints, but most sufferers are still left with permanent, severe disabilities. NINDS estimates that 10,000 people suffer a spinal cord injury every year, and 200,000 are currently living with the injury. As recently as a decade ago, doctors only ...

Finding of key blood sugar controller could yield new diabetes drugs

...1998, they showed that PGC-1 became more active in muscles and fat of mice exposed to cold. To test whether it had a role in gluconeogenesis, the scientists loaded harmless viruses with PGC-1 genes and infected mice with them. The PGC-1 turned on other genes that triggered glucose production, and the mice ...

Molecular motor packs DNA into viruses at greater than champagne pressures, researchers report

...r observed, stronger than the motors that move our muscles or the nanoscale molecular motors that duplicate DNA or transcribe it into RNA. The motor the researchers studied is part of the bacteriophage 29 (phi-29), a virus that is the scourge of the common soil bacterium Bacillus subtilis. "Pound for pound, ...

UC Berkeley expert on insect flight receives prestigious MacArthur 'genius' award

...e and his laboratory colleagues dissect fly flight muscles and nerves to tease out their interconnections or to record electrical signals from them. "There is nobody in the world who has the range of expertise, from neurophysiological approaches through fluid mechanics, that Michael has," Lauder said. Ron Fe...

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