Tag: "circulation" at biology news
Satellite images give a better picture of sediment transport
...chniques in order to unravel the system of current circulation
and sediment transport (1). Satellite remote sensing provides reliable quantified data on the concentration of suspended matter in water. The researchers compared the data transmitted by the Landsat satellite with figures from in situ measurements ma...
Ebola virus: from wildlife to dogs
...g 5 drills, 1 baboon and 1 mandrill) suggests that circulation
of the virus involved many contamination events be... are indicators of the complexity of Ebola virus's circulation
in its natural environment. These observations also show that an epidemic or sporadic cases can appe...
National Academies news: Spent nuclear fuel storage
...e years: It is a passive system that relies on air circulation
for cooling, and it divides the inventory of spent fuel into a number of individual, robust containers, each containing only a small amount of the total inventory. The committee found that although there are some differences in the robustness of di...
The promise of new medical uses for sodium nitrite for heart attack and organ damage
...nd that infusions of sodium nitrite into the human circulation
leads to the production of nitric oxide (NO), a strong blood vessel dilating molecule that increases blood flow. The conversion of nitrite to NO will occur only in tissue or blood that is very low in oxygen. It was this finding that triggered the t...
Glaciers from Antarctic peninsula in widespread retreat, Science study says
... big role in the retreat of these glaciers, global circulation
models need to reproduce the timing and geographic extent of the regional warming that has taken place on the Antarctic Peninsula, a concept that David Vaughan from the British Antarctic Survey in Cambridge, UK and colleagues covered in a "Perspectiv...
Royal Society study on adaptability of fish to warming oceans
...onization of deep-sea environments than deep-water circulation
patterns. Contact: Dr AB Smith, Department of Palaeontology, The Natural History Museum, London SW7 5BD, UK Density-dependent dispersal and spatial population dynamics by Professor RA Ims and Dr HP Andreassen How synchronized are population fluctua...
Identifying blood stem cells is a SLAM dunk
...uggest that the reason stem cells can get into the circulation
so fast might be that at least a subset of them is sitting right on top of the sinusoids that they would use to enter circulation," said Morrison. These insights represent only the beginning of new research pathways in stem cell biology enabled by th...
Oceans turning to acid from rise in CO2
...rface, the geological and historical record, ocean circulation
models, and what's known about ocean chemistry," continued Caldeira. "What we can't predict is just what acidic oceans mean to ocean ecology and to Earth's climate. International and governmental bodies must focus on this area before it's too late." ...
Enzyme affects hypertension by controlling salt levels in body
...rough these channels and is then returned to blood circulation
through another sodium transporter," he said. "The sodium channel critically governs how much sodium gets reabsorbed." Normally, the kidney filters and reabsorbs about 99 percent of sodium from the blood and returns it to the body, excreting 1 percen...
Researchers pinpoint genes that drive spread of breast cancer to lungs
...logists, we felt that when tumor cells escape into circulation
and reach the various organs, these organs are adapted by millions of years of evolution to maintain their integrity and to eliminate those cells," said Massagu. "So, the few metastatic cells that overcome those barriers must have a very special gene...
JCI Table of contents August 1, 2005
...ar receptors regulating these genes, and the liver circulation
was intact. However, the negative feedback suppression of one bile acid synthesis gene was significantly impaired. Interestingly, the loss of beta Klotho also provided some benefits to the mice including absence of gallstone formation, and control ...
Tadpole soon to help in the fight against cancer and lymphedema
...roteins leak out of the blood vessels during blood circulation
in the body. A network of lymphatic vessels catches this extravasated colorless fluid, lymph, and transports it back to the blood vessel network. The lymphatic vessel network is of major importance. It is essential for regulating fluid in the body an...
Climate model links higher temperatures to prehistoric extinction
...0 feet (4,000 meters), interfering with the normal circulation
process in which colder surface water descends, ta... article. The CCSM's simulations showed that ocean circulation
was even more stagnant than previously thought. In addition, the research demonstrated the extent to...
Climate change will affect carbon sequestration in oceans, model shows
...cal and chemical interactive mechanisms, the ocean circulation
could change and affect the retention time of carb...f carbon dioxide in the ocean basins and the ocean circulation
patterns themselves, Jain said. As sea-surface temperatures increase, the density of the water decre...
Can ancient rocks yield clues about catastrophes like Hurricane Katrina?
...ulted in major changes in ocean chemistry and deep circulation
causing disastrous consequences for marine ecosyst...ty and supporting oxygen depletion and a change in circulation
patterns in the deep ocean. Climate modeling identified that specific periods of extremely high rive...
Secrets of the whale riders
...acific and North Atlantic, Rowntree says. Changing circulation
patterns established warm currents that discouraged right whales from moving between southern and northern oceans. "Right whales have such thick blubber they can't cross the equator," Rowntree says. "The waters are too warm. They can't shed heat." ...
Lands surface change on Alaska tundra creating longer, warmer summers in Arctic
...ka could not be attributed to regional atmospheric circulation
patterns or to a reduction in sea ice in the summer or to an increase in cloud cover. The observed summer temperature increases are likely related to a global warming trend that has led to a longer snow-free season and an increase in the extent of wo...
UNC computer, marine scientists collaborate to predict flow of toxic waters from Katrina
...ve been developing forecasts that will predict the circulation
of those foul waters. A group of researchers, incl...heir goal is to provide daily forecasts of coastal circulation
and pollutant concentrations in the Katrina-affected region, information that will be vital as clean...
Duke scientists explain gaps in nutrient availability within North Atlantic
...loped an explanation for why a vast North Atlantic circulation
zone can have a large variability in nutrient supplies needed to sustain ocean plants and, by extension, support the food web of marine life. The circulating zone in the North Atlantic Ocean, known as a "subtropical gyre," swirls in a clockwise dire...
Substance lining blood vessels may cause cardiovascular disease
...to contribute towards diseases associated with the circulation
system, such as heart failure, high blood pressure, stroke and kidney disease. A study to be published in the open access journal PLoS Medicine looks at the role of asymmetric dimethylarginine (ADMA), which is found in the vessel lining of healthy ...
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