Tag: "pumping" at biology news

Scientists repair damage from heart attack

...re than 40 percent of the left ventricle (the main pumping chamber of the heart) is damaged, the patient ultimately dies. In their search for a way to reverse the damage, the team began by isolating bone marrow stem cells from male mice. The isolated stem cells carried a newly inserted gene that produces gr...

Development of important immune cells relies on more complicated influences than scientist had thought

...ular bacterial infections such as tuberculosis, or pumping up the supply of Th2 cells to combat autoimmune diseases and extracellular microbes such as intestinal worms. In their work, Reiner and his colleagues scrutinized the cascade of events that follow when uncommitted cells are exposed to a protein fact...

Feeding fish use crossflow filtration

...ed by swimming around with their mouths open or by pumping water into their mouths. Water is pushed out through gill slits in the side of the head. Food particles in the water are trapped and swallowed. Fish don't swallow much water with their food, so somehow food and water are separated. Look in the mouth...

Finding of key blood sugar controller could yield new diabetes drugs

...sugar balance, "but in diabetes, the liver is just pumping glucose all the time because its stuck in the on position," say Spiegelman, who is also a professor of cell biology at Harvard Medical School. For some 20 years, he said, scientists have searched for but failed to discover the molecular switch that t...

Animal study finds embryonic stem cells can repair heart muscle

...tment option for CHF, which diminishes the heart's pumping ability, leaving patients fatigued, often to the p...ent." Heart failure develops when the heart stops pumping effectively due to the destruction of muscle cells, known as cardiomyocytes. Damage inflicted during...

New theory of the evolution of bird flight linked to parental care

...ung. They started to feed their young in the nest, pumping liquid food or placing small food items in their mouths. They also began to produce fewer and more dependent offspring and smaller eggs, and began nesting in bushes and then small trees to better protect their offspring from predators. Gradually the ...

Chinese tallow tree invades Texas prairies

...ut. He is also flooding sections of prairies and pumping water out of others to determine whether wet or dry conditions can make the prairies more vulnerable to invasion. Another study involves examining the effect fertilizing with nitrogen has on the trees growth. "Prairie grass is very efficient at usi...

Failure of critical protein connection at heart of cardiomyopathy

...ted cardiomyopathy (DCM), a condition in which the pumping chambers of the heart enlarge and cannot pump adequately, according to researchers at Baylor College of Medicine in a report in todays issue of the journal The Lancet. However, allowing the heart to rest by using a mechanical device called a ventricu...

Experiments reveal ancient blood flow map

...h blood cells are moved throughout the body by the pumping of a primitive heart called the dorsal vessel. In flies, blood cells are involved in recognizing and destroying pathogens, digesting remnants of dead cells, and wound healing, among other roles. To determine what function VEGF and its receptors playe...

Industry explores renewable resources, such as lignin

... resources to run industrial processes, instead of pumping oil out of Alaska. This is what people all over the world want, what the Kyoto Accords are all about," says Wolfgang Glasser, professor of wood science and forest products at Virginia Tech. Lignin, a natural polymer isolated from wood during paperma...

Microbiology team probes bacterium's surprising survival tactics

...efforts at flushing uranium from the soil involved pumping water out of an area and removing the soil - a process which has proven to be both expensive and inefficient, Lovley said. "Geobacters don't actually remove the uranium," explained Lovley, "but they do transform the metal from a soluble form to an in...

UMass microbiology team probes bacterium's surprising survival tactics

...efforts at flushing uranium from the soil involved pumping water out of an area and removing the soil a process which has proven to be both expensive and inefficient, Lovley said. Geobacters dont actually remove the uranium, explained Lovley, but they do transform the metal from a soluble form to an insolub...

Hopkins scientists reveal how sound becomes electric

..." adds Fuchs. "But for hair cells, their continual pumping of messengers toward the nerve may be a kind of fail-safe device that ensures a ready supply of transmitters should the sound continue or change." Hearing aids and cochlear implants are designed to boost or replace the sound-detecting function of hai...

Bioengineered, rhythmically beating heart muscle could aid cardiac research

...issue within the inner surface of the heart's main pumping chambers. Although still some distance away from any human clinical application, the model could prove a valuable scientific tool for exploring cardiac disease, including electrical and mechanical disturbances of the heart. Details of the ...

Molecular architecture and action of a proton pump

...h binds ATP rotates by more than 70 during the ion pumping cycle, enabling the release of energy which is the... motions and the release of energy that drives the pumping process. A synthetic peptide of these 38 amino acids stimulates the pump's activity by more than 10-...

Big-bottomed sheep have a rare genetic mutation that builds muscle, not fat

...-author of the study. "These sheep are, in effect, pumping iron without lifting weights," explained Jirtle. "They are converting food into muscle in their hind regions, instead of converting food into fat." Results of the study, funded by the USDA and the National Institutes of Health, are published in the ...

Heart size and function uncoupled by researchers

...lso plays a major part in controlling heart muscle pumping and function was completely novel and unexpected."...m now is that there is no drug which maintains the pumping function of the heart," says Penninger. "We found the proteins that genetically control this. So the...

Study shows first direct evidence that transplanted muscle cells can take root in damaged hearts

...ns injected the cells into the wall of the heart's pumping chamber during an open-heart surgical procedure e...elp pump blood. The LVAD helps boost the patient's pumping power, by feeding blood into a battery-powered metal pump and out through a tube connected to the ma...

UF study suggests schools boost empty calories to raise test scores

... some school districts have sought an advantage by pumping up their pupils with extra calories from junk food, a study conducted at the University of Florida suggests. The study, published this month in the National Bureau of Economic Research's online working paper series, found that on test days many dist...

Arsenic in Bangladesh drinking wells may be linked to crop irrigation, MIT study finds

...ncentrations in other areas. Curtailing irrigation pumping is not a solution." Harvey is also an author of a research paper providing an epidemiological analysis of arsenic-induced illness throughout Bangladesh. That paper will appear next year in the Water Resources Research journal published by the America...

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