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Tag: "circulation" at biology news

Emory Study Tests Bone Marrow Stem Cells to Improve Circulation in Legs

...d vessels. This repair process results in improved circulation evenduring exercise. Some people are not able to repair their own vessels,however, and physicians don't completely understand the reasons why.Recent studies show that when muscles do not receive enough blood, thebody makes growth factors that stimula...

Imaging Lymph Nodes with Nanoparticles

...ide core and are covered by dextran, impartinglong circulation times and biocompatibility. When injectedintravenously, the nanoparticles localize to lymphoid tissue, and areinternalized into macrophages. There is then a decrease in signalintensity on T2- and T2*-weighted images, and when metastases arepresent th...

UCSD team discovers specialized, rare heart stem cells in newborns

...e newborn heart no longer relies upon the mother's circulation and oxygenation," Chien said. "We believe the isl1+ progenitor cells are left over from fetal development so that they can insure the closure of any existing small heart defects and the formation of a completely mature heart in newborns." The UCSD t...

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...

Climatologists discover deep-sea secret

...University has shown for the first time that ocean circulation in the southern hemisphere has, in the past, adapted to sudden changes in the north. The research published today in Science will enable more accurate forecasts to be made on how the oceans will react to climate change. The scientists have observed ...

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, inc...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...

Discovery of T-cell 'traffic control' boosts new drug promise

...ng how the two systems interact to regulate T cell circulation and prevent a constant and potentially dangerous release of T cells, or lymphocytes. The research is presented this month in a special issue of Nature Reviews Immunology. Authors are Edward Goetzl, MD, at UCSF and Hugh Rosen, MD, PhD, at the Scripps...

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...

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...

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 perce...

Tropical Deforestation affects rainfall in the U.S. and around the globe

...air pressure distribution shift the typical global circulation patterns, sending storm systems off their typical ...erical simulations performed with a single general circulation model and that reproducing the experiment with other computer models using different atmospheric var...

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." ...

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...

How 'Dirt' Could Educate The Immune System And Help Treat Asthma

...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...

Implantable pumps extend lives of patients too sick for transplant

Pumps implanted into the chest to maintain circulation can significantly extend the lives of the sickest patients in end-stage heart failure who are not candidates for heart transplantation, according to the results of a clinical trial led by Duke University Medical Center cardiologists. The pumps, know...

Scientist measures role of science's coolest player: The snow

...luding soil temperatures, cloud cover, atmospheric circulation patterns and soil moisture levels. Aside from his temperature-related projections, Vavrus also made the counterintuitive finding that in the absence of snow, total regions of permafrost-the permanently frozen soil of the cold north-are likely to exp...

Learning and memory stimulated by gut hormone

...y performance. Because ghrelin is highest in the circulation during the day and when the stomach is empty, these results also indicate that learning may be most effective before meal-time. "Based on our observations in animal models, a practical recommendation could be that children may benefit from not overe...

High-tech tags on marine animals yield valuable data for biologists and oceanographers

...puter model designed to simulate and predict ocean circulation patterns in the California coastal region. Preliminary results indicate that plugging in the sea lion data substantially increases the predictive capabilities of the model, Costa said. "It's like predicting the weather. To get accurate predictions,...

Heart-healthy compound in chocolate identified

...nown as flavanols, was directly linked to improved circulation and other hallmarks of cardiovascular health. Find...vanols present in cocoa, their absorption into the circulation and their effects on cardiovascular function in humans," said UC Davis biochemist Hagen Schroeter, w...

Chemical guidance of T cells leads to immunologic memory and long-term immunity

...nfection, some of these CD8+ T cells remain in the circulation as memory cells, primed to fight if the host is re-infected with the same pathogen. Memory cells are key to vaccine strategies being studied for infectious agents such as HIV. But the CD8+ T cells can only become effective, long-lived memory cells af...

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Breaking Biology News(10 mins):Microbiome research shows each tree species has a unique bacterial identity 2Meteorite that doomed the dinosaurs helped the forests bloom 2Meteorite that doomed the dinosaurs helped the forests bloom 3New research decodes virus-host interactions in ocean dead zones 2New research decodes virus-host interactions in ocean dead zones 3
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