flow in Biological News

Abnormal brain circuits may prevent movement disorder

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

'Microfluidic palette' may paint clearer picture of biological processes

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

Troubled waters: Low Apalachicola River flow may hurt gulf fisheries

... TALLAHASSEE, Fla. -- Reductions in the flow of the Apalachicola River have far-reaching ... "This work shows that variations in the river flow can have implications on marine ecosystems over a ... that there might be a link between the river flow variations and offshore fisheries." Morey, ...

Discovery of the cell's water gate may lead to new cancer drugs

... The flow of water into and out from the cell may play a ... have now found the gate that regulates the flow of water into yeast cells. The discovery, which ... All living organisms must be able to regulate the flow of water into and out from cells, in order to ...

Babies born to native high-altitude mothers have decreased risk of low birth weight

... The study, "Augmented uterine artery blood flow and oxygen delivery protect Andeans from ... uterine artery, which dilates to increase blood flow to the fetus during pregnancy. The low-oxygen ... affects the uterine artery, reducing blood flow and oxygen delivery to the infant. Reduced ...

Flow of potassium into cells implicated in schizophrenia

... has implicated machinery that maintains the flow of potassium in cells and revealed a potential ... neurons," added Weinberger. By regulating the flow of potassium ions into the cell, potassium ... signals neighboring neurons in a circuit. This flow is regulated, in part, by activity of the ...

Your brain on -- and off -- caffeine

... looked at brain electrical activity and blood flow during caffeine withdrawal to examine what was ... activity via electroencephalogram (EEG); blood flow velocity in the brain via ultrasound; and ... consumption produces changes in cerebral blood flow velocity and quantitative EEG that are likely ...

Unifying the animate and the inanimate designs of nature

... believe connects the two worlds is a theory that flow systems from animal locomotion to the formation ... or other forms of resistance, so that they flow more easily with time. This view has been termed ... is analogous to the way form evolves in inanimate flow systems is a novel concept that has the potential ...

Researchers develop flow sensors based on hair structures of blind cavefish

... jelly-encapsulated hair cell measures important flow information," said Vladimir Tsukruk, a professor ... motion detector that mimics the underwater flow measurements made by the blind cavefish. This ... created by moving or stationary bodies in a flow field. The hair cell needed the gel-like capsule ...

Flight of the bumble (and honey) bee

... from one plant to another. The study of gene flow has experienced more attention in part due to the ... and, until recently, none has determined pollen flow in watermelon plantings. New research ... the study indicated that the evaluation of pollen flow showed a definite pattern of bee movement and ...

Multiple route bone marrow stem cell injections show promise to treat spinal cord injury

... cord there is evidence of hemorrhage and blood flow is attenuated, he explained. The disruption of blood flow leads to spinal cord infarction, the disruption ... environment. We hypothesized that improved blood flow and oxygen supply could contribute to functional ...

Interventional treatment can be recommended as first-line treatment for 'silent killer'

... a graft within an aneurysm redirects blood flow and stops direct pressure from being exerted on ... of the graft after treatment or persistent blood flow into the aneurysm, which resumes the risk of its ... and endoleaks may occur, causing blood to flow outside the endovascular graft. Researchers noted ...

For old or young dialysis patients, AV fistulas remain pure gold

... time the access stayed open and in moving blood flow efficiently. An AV fistula is the preferred ... the forearm that allows blood from the artery to flow into the vein, thus providing access for dialysis. The increased blood flow makes the vein grow larger and stronger so it can ...

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

... optical device to monitor cerebral blood flow in patients with acute stroke, a leading cause of ... continuous bedside monitoring of brain blood flow and metabolism. "Our preliminary study demonstrates that blood flow changes can be reliably detected from stroke ...

CSHL researchers identify gene that helps plant cells keep communication channels open

... nutrients and genetic instructions for growth to flow in. Developmental and environmental cues ... of the tiny channels, thereby altering the flow of traffic through them. The genes and molecular ... new growth takes place. The enzyme improves the flow of traffic through plasmodesmata by acting as an ...

TGen and ASU researchers find drug that could reduce risk of Alzheimer's

... Ariz. Feb. 2, 2009 A drug used to improve blood flow to the brain also could help improve learning and ... patients by dilating blood vessels when blood flow is curtailed. Now, a team of Arizona ... the brain by dilating blood vessels when blood flow is curtailed. In the body, Fasudil breaks down ...

Entrust Announces Financial Results for Fourth-Quarter and Fiscal 2008

... to $17.5 million Full-year non-GAAP cash flow from operations was $12.0 million, excluding the ... by $4.3 million, generated $12 million of cash flow (excluding restructuring charges), and increased ... helped deliver our strong earnings and cash flow in the quarter and year. Our focus on providing ...

January-February GSA Bulletin media highlights

... near the Dead Sea; how shrimp affect groundwater flow in the Biscayne aquifer; a possible emerging ... through inflation or extrusively through lava flow and/or ash fall emplacement. Higher heat flow during Noachian time, or geothermal heating due ...

January GEOLOGY media highlights

... traveled up to 7.7 km. A co-generated second flow took a more tortuous initial path, before riding ... is particularly strong when a thick, high-density flow front forms, which races ahead of the tail, to ... direction of intermediate-to-deep water flow through the Central American Seaway was from the ...

Research finds older women who are more physically fit have better cognitive function

... finds that physical activity benefits blood flow in the brain, and, as a result, cognitive ... time that people who are fit have better blood flow to their brain. Our findings also show that better blood flow translates into improved cognition." The ...

Study helps explain connection between sleep apnea, stroke and death

... − Obstructive sleep apnea decreases blood flow to the brain, elevates blood pressure within the ... restoring normal blood oxygen and blood flow to the brain. Ordinarily, the brain regulates its blood flow to meet its own metabolic needs, even in the face ...

Models simulate nitrate dynamics in Garonne, Southwest France

... algal blooms. In this context, dynamic models of flow and water quality are required to aid the ... described the spatially and temporally complex flow and N dynamics of a major European watershed, the ... of Nitrogen (INCA-N) models to simulate daily flow and N dynamics. This is the first application ...

AGU journal highlights -- Dec. 31, 2008

... the past decade have shown dramatic changes in flow speed on year-to-year timescales at Greenland's ... observed several large and sudden increases in flow speed along the length of the glacier. These ... Title: Step-wise changes in glacier flow speed coincide with calving and glacial ...

Another reason to drink a nice cup of shade-grown joe

... shade coffee farms maintain plant population gene flow across fragmented habitats." Gene flow refers to the transfer of genes from one ... another by interbreeding. The maintenance of gene flow is an important conservation measure since ...

MIT researchers explain mystery of gravity fingers

... repeatedly show the presence of preferential flow in the form of fingers. Yet, after several ... by scientists, who actually refer to this as "the flow of thin films": why water builds up at the tips ... to with the surface tension. Before the water can flow down the film, it must build up enough energy to ...

It takes 2 to tango

... neighbouring cells to form new synapses. If the flow of information weakens, the synapses disappear ... of the synapse than hitherto assumed. Once the flow of information to be passed on by a cell is ... While the number of synapses is reduced when the flow of information weakens, new transmitter terminals ...

'Gray's Paradox' solved: Researchers discover secret of speedy dolphins

... community. But now, armed with cutting-edge flow measurement technology, researchers at Rensselaer ... Wei created this new state-of-the-art water flow diagnostic technology by modifying and combining ... for aerospace research with a video-based flow measurement technique known as Digital Particle ...

The physics of star-forming clouds and the urban environment

... From the collapse of star-forming clouds to the flow of the molten Earth's core, from the combustion ... generation of magnetic field by a fully turbulent flow of liquid sodium. This field can switch ... three years to measure microscopic fluid slip and flow along walls, study complex fluids, and observe ...

Jupiter's shrinking red spot

... the floor below the windows, creating a swirling flow pattern within each row of seats that effectively ... aisle will disrupt this carefully designed flow pattern by creating a wake of eddies that can ... with the ventilation system's swirling flow creates a stagnant zone "at just the wrong ...

Animal and biological science highlights: San Antonio Fluid Dynamics Conference, Nov. 23-25

... experience at high speeds from the turbulent flow of water around their bodies--a conundrum known ... Velocimetry (DPIV). In the technique, the fluid flow within a digital camera's field of view is ... who plans to use the DPIV technique to measure flow around other marine mammals. "These measurements ...

Alpine rivers hold important clues for preserving biodiversity and coping with climate change

... susceptible to changes in climate, river flow and channel management." The ESF workshop ... Alpine rivers receive a significant part of their flow from snow and ice melt and so are particularly ... guardian of habitats but also in modulating water flow and sediment movements. A full understanding of ...

Mysterious microbe may play important role in ocean ecology

... pure sample of these unique cyanobacteria using a flow cytometer--a device that rapidly sorts individual cells based on size and color. The flow cytometer can take the cell soup from an ocean ... can be concentrated to nearly pure levels using flow cytometry. The team harvested DNA from the ...

Following the leader can be a drag, according to student's research on flapping flags

... to show that two or more flexible objects in a flow -- flags flapping in the wind, for example -- ... two fishing lines and constantly refreshed with a flow of water from the top. Into the membrane, he ... interfere with each other -- to measure the fluid flow around the flapping flags. Instead of finding ...

OSA's ISP launches with research on breathing disorders and congenital heart defects

... show three-dimensional structure and the blood flow mechanism at the earliest stages of heart ... have come up with a new way of measuring blood flow and imaging the structure of the heart in a ... of the first insights into the mechanism of blood flow at the earliest stages of heart development. A ...

Study may explain exercise-induced fatigue in muscular dystrophies

... "The signaling pathway probably maintains blood flow into the muscle during exercise and keeps the blood flow going after exercise. But when nNOS is missing or ... exercise, but after exercise that reduced blood flow to the recovering muscles produces the fatigue." ...

AGU journal highlights -- Oct. 16, 2008

... wind forcing, which can drive seasonal on-shelf flow that varies in strength from year to year. A ... reveal that warm waters from the North Atlantic flow along the eastern margin of the Nordic seas while cold waters from the Arctic flow south along the east coast of Greenland. However, ...

Where optics meets medicine

... system and then monitor the effect on blood flow in upstream capillaries in the brain. They find ... venules can cause a significant decrease in blood flow in upstream capillaries, which in turn could ... surgery. The method is based on observing blood flow in the brain. Active brain regions have increased ...

Flooding might help lower gas emission from wetlands

... the emissions from wetlands that receive a steady flow of water. The study compared the emission of ... river flooding and one with a steady, low flow of water. The research showed that in areas of ... same amount of water but maintained a constant flow of water through the wetlands to mimic less ...

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

... a person's veins can no longer ensure a one-way flow of blood back to the heart. "Blood flows to ... The loss of the valve leaflets allows blood to flow the wrong way, causing swelling in the legs and ... that the prosthetic vein valve exhibited low flow resistance, strong competency, ...

Moderate quantities of dirt make more rain

... they are observing how aerosols change the flow of energy in the atmosphere and thus air ... the labyrinth of conflicting effects is the flow of energy. With this approach, the team has ... compensates for this. The link between energy flow and precipitation explains, for example, why rain ...