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Tag: "flow" at biology news

Now, self-healing materials can mimic human skin, healing again and again

... same manner that a cut in the skin triggers blood flow to promote healing, a crack in these new materials will trigger the flow of healing agent to repair the damage,” said Nancy Sottos, a Willett Professor of materials science ...

Migration alert -- How tumor cells home in on the lymphatic system

...er chemical strategy to exploit this slow, one-way flow in order to migrate to functional lymphatic vessel...atics drain fluid, there will always be slow fluid flow going away from the tumor into the lymphatic vessel. This slow flow biases the concentration distrib...

Marine phytoplankton changes form to protect itself from different predators

...ns in the surface waters. “This could alter the flow of energy and nutrients from deep to shallow, depending on what might be trying to eat it, and how the organism responds to the chemical signals of what’s attacking it,” Hay said. Experimentally, the researchers attempted to separate the chemical ...

Clot-dissolving agent may be beneficial in treatment of severe frostbite

...rostbite underwent imaging studies to assess blood flow to the affected limb. From 2001 to 2006, six patients with abnormal blood flow on angiography received tPA within 24 hours of severe frostbite injury. These individuals were compa...

St. Jude study shows genes play an unexpected role in their own activation

... “CREB is like a plumber who turns on the water flow in a pipe system by using a certain tool,” Brindle said. “What we discovered is that the CREB ‘plumber’ requires different tools to turn on different genes; and that each gene determines which set of co-factor tools from CREB’s toolbox it will respon...

Focused ultrasound relieves fibroid symptoms in women

... tissue. "This treatment immediately stops blood flow in the treated fibroid tissue, which results in a significant, sustained decrease in symptoms for up to 12 months," said the study’s lead author, Fiona M. Fennessy, M.D., Ph.D., assistant professor of radiology at Harvard Medical School and staff rad...

New research shows sharks use their noses and bodies to locate smells

... team, this is similar to how humans can sense air flow with the small hairs on the face. Until now, it had not been demonstrated that the lateral line also aids in the tracking of odor plumes. "Odor plumes are complex, dynamic, three-dimensional structures used by many animal species to locate food, ma...

Human stem cell treatment restores motor function in paralyzed rats

Rats paralyzed due to loss of blood flow to the spine returned to near normal ambulatory fu...at when damage has occurred due to a loss of blood flow to the spine’s neural cells, by grafting human neural stem cells directly into the spinal cord we ca...

Statin treatment improves spatial memory in mouse models of Alzheimer's

...in the brain, which eventually will increase blood flow and improve circulation to the memory region of the brain. These findings suggest that increases in brain nNos levels may play an important role in statin-induced improvement of spatial reference memory. The transgenic mice used in the study are h...

Mice with a migraine show signs of brain damage

...expected tale of supply and demand regarding blood flow and oxygen. In short, the team found that the ...ni-stroke, or after a severe injury, or when blood flow to the brain is completely stopped, such as during a heart attack. “In mice, the damage from thes...

Catching cancer's spread by watching hemoglobin

...enough, researchers can capture snapshots of blood flow in individual vessels. Moving beyond mere imaging, the technique can detect the difference between oxygen-carrying hemoglobin (oxyhemoglobin) and oxygen-lacking hemoglobin (deoxyhemoglobin). This is important for monitoring tumors, because the oxygen...

Machine preservation may promote more organ sharing

...onnected to a portable pump to maintain a constant flow of a specialized preservation solution through the organs until transplantation. With both methods of preservation, a cooling solution is pumped into the organs during organ recovery. However, with simple cold storage, the kidneys are simply immerse...

How the brain's backup system compensates for stroke

...s radio waves and magnetic fields to measure blood flow in brain regions, which reflects brain activity. The researchers found that the magnetic pulses to the left PMd briefly disrupted the subjects' performance on the task, but that performance quickly recovered. The fMRI scans revealed that during th...

Students invent protective pouch to enhance cell therapy

...ame time, the spheres allow beneficial proteins to flow out and oxygen and glucose to flow freely in. Arepally and Bulte, both faculty members in the Russell H. Morgan Department of Radiology...

Egyptians, not Greeks were true fathers of medicine

... were treated with rubefacients to stimulate blood flow and poultices to warm and soothe. They used celery and saffron for rheumatism, which are currently topics of pharmaceutical research, and pomegranate was used to eradicate tapeworms, a remedy that remained in clinical use until 50 years ago. "Man...

Percutaneous aortic valve replacement safe, successful in high-risk patients

...a direction opposite, or retrograde, to the normal flow of blood. Once the catheter is properly positioned...p for an average of 30?0 minutes to minimize blood flow through the aorta and ease placement of the replacement valve. All 17 patients survived the proc...

Slowing the racing heart

...beat that varies to increase or decrease the blood flow to the body as we eat, sleep or exercise. "Disturbances of pacemaker control are common in heart diseases. When the heartbeat becomes non-rhythmic and chaotic, it can result in fatal arrhythmias and stroke," said R. John Solaro, UIC distinguished...

Researchers develop way to calculate speed of bacterial sex

...hat are resistant to antibiotics and increase gene flow from genetically modified organisms to native soils. By developing a real-life model of bacterial gene transfer, UC-Davis researchers hoped to gain insight into the rates of bacterial adaptation in the environment. They report their findings in the M...

Deconstructing brain wiring, one neuron at a time

...." Neuroscientists also want to deconstruct the flow of electrical signals in the extraordinarily compl...n neurons have previously been used to outline the flow of nerve cell communication, but they have two drawbacks. First, once inside the brain, they keep sp...

Researchers find link between food odors and lifespan in fruit flies

...ation of the tiny flies. Carefully controlling the flow and oxygen content of air flowing to the flies in ...ation of the tiny flies. Carefully controlling the flow and oxygen content of air flowing to the flies in sealed systems, he can determine the flies' metabo...

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