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flow in Biological News

Troubled waters: Low Apalachicola River flow may hurt gulf fisheries

TALLAHASSEE, Fla. -- Reductions in the flow of the Apalachicola River have far-reaching effects that could prove detrimental to grouper and other reef fish populations in the northeastern Gulf of Mexico, according to a new Florida State University study that may provide new ammunition for states e...

Trans fats hinder multiple steps in blood flow regulation pathways

CHAMPAIGN, Ill. Partially hydrogenated vegetable oils in processed foods contain trans fatty acids that interfere with the regulation of blood flow. A new report reveals a new way in which these "trans fats" gum up the cellular machinery that keeps blood moving through arteries and veins. In t...

Researchers develop flow sensors based on hair structures of blind cavefish

A blind fish that has evolved a unique technique for sensing motion may inspire a new generation of sensors that perform better than current active sonar. Although members of the fish species Astyanax fasciatus cannot see, they sense their environment and the movement of water around them w...

Penn research team tests bedside monitoring of brain blood flow and metabolism in stroke victims

PHILADELPHIA A University of Pennsylvania team has completed the first successful demonstration of a noninvasive optical device to monitor cerebral blood flow in patients with acute stroke, a leading cause of disability and death. The ultimate goal of this research is to improve the management...

Prosthetic vein valve designed to direct blood flow shows promising pre-clinical results

Engineers at the Georgia Institute of Technology have developed a prosthetic vein valve to help improve the lives of those suffering from a condition known as chronic venous insufficiency. The condition, which affects more than seven million people in the United States alone, occurs when valves in...

Natural compounds in cocoa tied to blood flow improvements for adults with type 2 diabetes

McLEAN, VA (May 26, 2008) Scientists have found that consuming cocoa flavanols naturally occurring compounds in cocoa may offer a benefit to those affected by type-2 diabetes. Consuming a cocoa flavanol-rich beverage daily may have the potential to positively impact the blood vessel dysfunct...

Mental stress reduces blood flow to the heart in patients with gene variation

GAINESVILLE, Fla. University of Florida researchers have identified a gene variation in heart disease patients who appear especially vulnerable to the physical effects of mental stress to the point where blood flow to the heart is greatly reduced. Searching for the presence of this gene may b...

Backpack straps can decrease blood flow in the shoulder and arm

SAN DIEGO, CA More than 92 percent of the children in the U.S. carry backpacks. Typically the backpacks are loaded with almost one-fourth of the childs body weight (22 percent) and worn with only one strap. Last year, a team of physician researchers examined the effect heavy-loaded backpack stra...

Weill Cornell team discovers how brain's own tPA helps regulate blood flow to neurons

NEW YORK (Jan. 17, 2008) -- The human brain contains its own store of a powerful enzyme (and stroke drug) called tissue plasminogen activator (tPA), which appears to be a key regulator of blood flow to brain cells, a team at the Weill Cornell Medical College in New York City reports. "We found ...

Protein identified that plays role in blood flow

COLUMBIA, Mo. For years, researchers have known that high blood pressure causes blood vessels to contract and low blood pressure causes blood vessels to relax. Until recently, however, researchers did not have the tools to determine the exact proteins responsible for this phenomenon. Now, using a...

Researchers link cocoa flavanols to improved brain blood flow

McLEAN, VA (August 18, 2008) Cocoa flavanols, the unique compounds found naturally in cocoa, may increase blood flow to the brain, according to new research published in the Neuropsychiatric Disease and Treatment journal. The researchers suggest that long-term improvements in brain blood flow cou...

Leatherback turtles go with the flow

Not much is known about the world's largest living turtle, the leatherback. So-called for its tough, oily skin and lack of a hard shell, the behavior and habitats of this critically endangered turtle have remained a mystery. In this week's PLoS Biology , marine biologist Barbara Block and colleag...

Scientists from the UGR prove that rivers do not act as barriers for groundwater flow

This release is also available in Spanish . The research team from the Geodynamics Department at the University of Granada and the Spanish Institute of Geology and Mining (which is part of the Spanish Ministry of Education and Science ) has studied the hydrogeology of the karst a...

International team of scientists warns of climate change's impact on global river flow

A global analysis of the potential effect of climate change on river basins indicates that many rivers impacted by dams or extensive development will require significant management interventions to protect ecosystems and people, according to an article published today in the online version of Fron...

Fast test for low blood flow in dogs detects early heart trouble

Working with dogs and using the latest in imaging software and machinery, also known as a 64-slice CT scanner, Johns Hopkins heart specialists have developed a fast and accurate means of tracking blood that has been slowed down by narrowing of the coronary arteries. Researchers say it took them le...

How blood flow dictates gene expression

Researchers at the University of Pennsylvania School of Medicine have pinpointed a key regulatory protein that translates blood flow into gene expression. The investigators showed that in a model of mouse embryonic development a transcription factor called Klf2, which resides in cells that line blo...

Blood flow in brain takes a twist, affecting views of Alzheimer's

New findings that long-overlooked brain cells play an important role in regulating blood flow in the brain call into question one of the basic assumptions underlying today's most sophisticated brain imaging techniques and could open a new frontier when it comes to understanding Alzheimer's disease....

UNC computer, marine scientists collaborate to predict flow of toxic waters from Katrina

In the immediate wake of Hurricane Katrina, scientists and research centers from across the country came together to generate information on the contaminated floodwaters and offer it to hazardous materials experts and public health officials. In a matter of hours, the University of North Carolina...

AGU journal highlights -- Aug. 6, 2009

...h. However, interpreting the tomographic images in terms of composition and flow remains a challenging task. On the basis of comparisons of geodynamic Earth...nt between their geodynamic models and tomographic images argues for mantle flow that is driven not by chemistry but predominantly by temperature variations...

Carnegie Mellon's Jean VanBriesen leads research team on Monongahela River

...d. Developers using hydraulic fracturing, which involves injecting water and sand into major shale formations to help natural gas flow up a well, will need millions of gallons of water to complete the process at well sites. Water that returns to the surface, called flowback or produce...

Abnormal brain circuits may prevent movement disorder

...es along the motor pathway that seemed to stop the flow of neural signals from one part of the circuit to ...ation carriers have a developmental problem in the flow of neural signals along this circuit such that the...cond pathway lesion, Dr. Eidelberg explained, "the flow is shut off and the abnormal activity stops." ...

August 2009 Geology and GSA Today media highlights

...ylvania State University, Dept. of Geosciences, University Park, Pennsylvania 16802, USA. Pages 759-762. Avulsions are the natural process by which flow is diverted out of an established river course and onto the adjacent floodplain. Avulsions are significant natural hazards because they produce extens...

'Microfluidic palette' may paint clearer picture of biological processes

...ype, but it could be moreallow various mixtures to flow into the chamber. Beneath the chamber, each access...nnels deliver test chemicals to the chamber. Fluid flow in and out of the short arms of each Y at constant...ely by diffusion. Therefore, as long as a constant flow of fluid is maintained through the Y's, the gradie...

Experimental treatment halts hypoxic-ischemic brain injury in newborns

...ibiting an enzyme in the brains of newborns suffering from oxygen and blood flow deprivation stops a type of brain damage that is a leading cause of cerebra... effect of injecting PAI-1 into newborn rats suffering from the brain blood flow reduction and systemic hypoxia. The enzyme inhibitor was injected into the ...

Key OSU water research receives national funding

...ould benefit greatly from having this information." The study will also examine the degree to which eastern redcedar encroachment can reduce stream flow production at the watershed level. Engle, who serves as director of the division's Water Research and Extension Center, said proliferation of woody...

Nanodiamonds deliver insulin for wound healing

...f several days. Insulin accelerates wound healing by acting as a growth hormone. It encourages skin cells to proliferate and divide, restores blood flow to the wound, suppresses inflammation and fights infection. Earlier investigations have confirmed an increase in alkalinity of wound tissue, due to ba...

Common allergy drug reduces obesity and diabetes in mice

... a variety of inflammatory vascular diseases. Mast cells are immune cells that facilitate healing in wounded tissue, primarily by increasing blood flow to the site. However, in certain conditions mast cells build up to levels far beyond what the body needs. As a result these cells become unstable and ...

DOE-funded research projects win 46 R&D 100 Awards for 2009

...the power line systems, researchers can develop more durable and reliable systems for the electric power grid. Power grid operators can maintain power flow and prevent potential grid failures, and effectively reroute power distribution during emergency or natural disasters. (Jointly with Electric Power Re...

Scientists link immune system's natural killer cells to infant liver disease

... bile duct surface tissues, even with the presence of rotavirus infection. The continuity of the mouse pup bile ducts was maintained, bile was able to flow from the liver to the intestines, and the animals grew well into adulthood without liver-related symptoms. ...

Slotted buses keep passengers cool

...owded bus. Kale's team has now carried out an aerodynamic study of fluid flow in a 1:25 model. Their findings suggest that a few simple modifications to ...ost or energy requirements of an air- conditioning system. The turbulent flow into a standard bus does not allow air into all areas. Passengers sitting n...

A global model for the origin of species independent of geographical isolation

...nior author of the study. "While the spatial environment may vary, specific physical barriers aren't necessary. Just as traffic jams can form from the flow of traffic itself without an accident, the formation of many species can occur as generations evolve across the organisms' spatial habitat." ...

Avoiding hysterectomy: Major interventional radiology E-collection info available

... recovery time than traditional surgery. Interventional radiologists use expertise in imaging to deliver treatment directly to a fibroid, blocking the flow of blood to the tumor and causing it to shrink. "With these modern treatments, hopefully the trend to offer traditional surgery first will be reversed...

Supply-Chain Council Announces New Board of Directors and Officers

...ent, Global Supply Chain, Alcon Labs, is now Chair of the Board and Nancy Craft, Manager, Volvo, is Secretary. Dennis Zagrodnik, Material & Order flow Manager, DaimlerChrysler, continuers as Treasurer, and Gary Kilponen, Energy and Manufacturing Industries Leader, Sunergos, is Vice Treasurer. Mary Sc...

PNNL scientist garners early career presidential award

...tional Laboratory has been recognized with a Presidential Early Career Award for Scientists and Engineers. The award honors his research on subsurface flow that addresses past and future energy needs: cleaning up buried nuclear or toxic contaminants and storing carbon dioxide from fossil fuels underground...

22nd Congress of the European College of Neuropsychopharmacology, Sept. 12-16, 2009, Turkey

...stic procedures and laboratory outcomes in the service of discoveries that will result in improved patient care (Zerhouni 2005). To facilitate the flow of information among researchers and clinicians, ECNP has set up in recent years a number of activities stimulating cross-disciplinary forces ranging...

NSF provides $3.4 million to study climatically important Agulhas Current

...ical waters southward along the east coast of Africa as a narrow, fast jet. At the tip of Africa the Agulhas retroflects, looping around to eventually flow eastward toward Australia. This retroflection is unstable and regularly sheds large Agulhas Rings, which carry Indian Ocean waters into the South Atla...

First riser-drilling research operations undertaken

...ively slow for the current speed usually observed in the Kumano Basin. Yet, fairings are to be mounted onto to a riser pipe to smooth the hydrodynamic flow behind the riser pipe (to reduce riser drag) and suppress the vortex-induced vibration under high current conditions. The motion of the riser also wil...

Who goes abroad for fertility treatment and why?

...ts coming for treatment between 2000 and 2007, as well as on the type of treatment for which they came. The researchers found that, since 2006, the flow of foreign patients into Belgium had stabilised at around 2100 patients per year, and that the majority of these were lesbian couples from France seek...

Researchers see evidence of memory in the songbird brain

...hat modulate the activity of other genes. Many other genes were downregulated, including those that code for ion channel proteins, which allow ions to flow into the cell. This could be one way that the brain dampens its response to a powerful stimulus, protecting itself from too much disturbance, Clayton ...

Dolphins get a lift from delta wing technology

... of the flippers of each species. Then they measured the lift and drag experienced by the flipper at inclinations ranging from -45deg. to +45deg. in a flow tunnel running at a speed that would have been the equivalent of 2m/s for the full scale fin. Comparing the lift and drag coefficients that the tea...
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