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Tag: "volume" at biology news

'Dead zone' summer killed billions of ocean state mussels

... mussels could filter the equivalent of the entire volume of Narragansett Bay in just 20 days. But within weeks of the die-off, that filtering capacity dropped by 75 percent. Altieri said this is an important, and troubling, finding for water quality and sea life in the bay. Hypoxia can start when fertili...

First direct mechanical communication of mitochondria, cardiomyocyte nucleus shown

...s mitochondrial matrix swelling) decreased nuclear volume by a significant 12% ± 2%. And 150 micro-molar of ...ensitive potassium channel opener) reduced nuclear volume a similar amount. "However, 150 micro-molar of 5-hydrooxydecanoate (thought to be a specific inhibit...

Researchers find molecular 'brake' to cell death

...tochondria needed to release a large and sustained volume of CC to overcome this nucleotide barrier, and they also found evidence that as soon as the release of CC increases, another mechanism kicks in that simultaneously begins to reduce the size of the nucleotide pool to allow CC to bind to Apaf-1, Tang s...

Chemical in many air fresheners may reduce lung function

...rease in the test which measures forced expiratory volume in 1(FEV1) second between the highest and lowest levels of exposure. FEV1 is a commonly used index for assessing airway function and obstruction. The researchers assessed the influence of other factors in an individual's environment that may be re...

Study finds how organs monitor themselves during early development

...ant for their survival. Spitz acts a bit like a volume control dial. Once it docks onto the EGF receptors, the intermingled cells send a signal to the primordial germ cells to stop growing. Increased EGF signaling in intermingled cells leads to reduced numbers of germ cells. "But if there is very little ...

New lab technique churns out fungus' potential cancer fighter

...to scale up this process rather easily to whatever volume they need," says Boeckman. "It may be a long road to a possible treatment, but at least we're now past the first hurdle." ...

New lab technique churns out fungus' potential cancer fighter

...to scale up this process rather easily to whatever volume they need," says Boeckman. "It may be a long road to a possible treatment, but at least we're now past the first hurdle." ...

Viagra improves high altitude exercise performance up to 45% for some

...e. The cyclists also significantly improved stroke volume (the volume of blood moved out of one ventricle of the heart per beat) and cardiac output (stroke volume times h...

Bubbles go high-tech to fight tumors

...s bubble that is approximately 125 times larger in volume than the droplet. "If a bubble remained spherical its diameter would be much larger than that of the vessel," Bull said. "So it deforms into a long sausage-shaped bubble that lodges in the vessel like a cork. Two or three doses of bubbles will occl...

Autistic brain has fewer neurons for processing emotion

... in young males with autism is abnormally large in volume due to precocious maturation. "It is somewhat surprising, therefore, that there are ultimately fewer neurons in the autistic amygdala," says Schumann. Schumann suggests different explanations: the amygdala was always that way from birth, a degener...

Heart has enough oxygen to survive hypothermia, CPR crucial

...blood pressure, low pulse, low cardiac output (the volume of blood the heart can pump per minute), or with oxygen transport to the cells," Tveita said. In particular, the research team wanted to know if insufficient circulation leads to inadequate oxygen supply to the heart cells, which in turn leads to hea...

Light guides flight of migratory birds

...earch in the Journal of Theoretical Biology (1988, volume 131). "I've felt every since that this was the key to understanding the integration of compass information in migratory birds" he said. ...

Surprise finding for stretched DNA

... rod is constructed from a material that conserves volume under stress. "As this system is stretched, the elastic rod decreases in diameter," said Bustamante. "This enables the outer wire to wrap a larger number of times over the length of the rod." The twist-stretch coupling results demonstrated by Bu...

Coming soon: 3-D imaging that flies 'through' and 'around' cancer

...oted, indicating that fused PET/CT images with 3-D volume rendering may provide additional beneficial information for image interpretation and create new areas of clinical application. While this technology may become standard over the next three to five years, "it could have exciting applications in cardio...

Brain-computer link lets paralyzed patients convert thoughts into actions

...oughts. He could change the channel and adjust the volume on a television, even while conversing. He was ultimately able to open and close the fingers of a prosthetic hand and use a robotic limb to grasp and move objects. Despite a decline in neural signals after 6.5 months, Nagle remained an active partici...

Ecosystem services and invasive species

...According to Cappellato, the Overton park stores a volume of carbon worth $40,000 ?$200,000 and adds more storage space through growth, worth $2,000 ?$ 10,000 each year. Cappellato and Bohnert plan to study the park further, as well as expand their study to urban forests throughout Memphis. She will discu...

Transgenic goat's milk offers hope for tackling children's intestinal disease

...ed to dairy cattle, rather than goats, because the volume of milk available from cows would be much larger than from goats. ...

Biofuels researcher searches for new sources

...tions. First, he is looking at how to maximize the volume of Montana crops or their residues with less input. At the same time, he is looking for the most efficient enzyme to break down the biomass into sugars and also looking at microorganisms that can ferment the sugars into fuel. Daniel Kammen, directo...

Drug dials down the energy within cells, UM researchers find

... Chemistry at U-M. "Our compound works more like a volume control, so we're able to dial enzyme activity down to a level that maintains normal function while simultaneously allowing for initiation of a process that selectively kills or disables disease-causing cells." Glick and collaborators published thei...

Mutant mice show key autism traits

...ome people with ASD that also show increased brain volume and enlarged heads. Wrote Joy Greer and Anthony Wynshaw-Boris in a preview in the same issue of Neuron, "caution is warranted because there are aspects of ASD that are not recapitulated in the Pten mutants. For example, the Pten mutants do not displ...

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