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Tag: "drain" at biology news

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

...cells secrete this same molecule. Since lymphatics drain fluid, there will always be slow fluid flow going away from the tumor into the lymphatic vessel. This slow flow biases the concentration distribution of this molecule towards the lymphatic, and the tumor cell follows it, like the proverbial carrot on...

3-D ultrasound scanner provides in-depth view of the brain

...the animal's brain, as is required in surgeries to drain cerebrospinal fluid and relieve pressure on the brain. In a second animal, the researchers made use of dyes to enhance ultrasound images of blood vessels in the brain. The new advance is the latest in a series of developments Smith's team has made...

An ancient bathtub ring of mammoth fossils

...ack up, creating temporary Lake Lewis, then slowly drain through to the Columbia River Gorge—all in a matter of days. Preliminary results place most mammoth finds in the Lake Lewis area at elevations of 600 to 1,000 feet, which echoes the distribution of boulders that originated from far away—so-called ...

Cornell lab confirms deadly fish virus spreading to new species

... boaters from moving live fish and require them to drain their boats and live wells before leaving Wisconsin’s Great Lakes waters, the Mississippi River and those tributaries up to the first impassable dams, according to the Associated Press. The spread of the virus could have a devastating impact on aqu...

Shedding new light on proteorhodopsin

... a battery to it nothing happens. However, if you drain the capacitor and then connect a battery, a current will flow." To observe proteorhodopsin in action and measure its effects, Liphardt and his co-authors genetically engineered a strain of Escherichia coli that would express the light-sensitive pr...

Hopkins scientists link immune response to 'ghost' parasites and severely congested sinuses

...sue and polyps, clearing a path for the sinuses to drain normally. Lane says that if left untreated, polyps can lead to severe blockage and recurring infections. All patients were monitored for a minimum of nine months to see if polyps and their resulting symptoms returned. Ten in the surgery group h...

HIV exploits competition among T-cells

... injecting each strain simultaneously so that they drain to different lymph nodes. In this case, no single T cell is chosen as a winner. Instead, a separate winner for each strain is picked in each affected lymph node before immunodominance can come into play. "In our simulations, this strategy appears e...

Stem cell activity deciphered in the aging brain

...e. The common assumption had been that the brain drain was due to a decreasing supply of neural stem cells in the aging hippocampus, said lead study investigator Bharathi Hattiangady, Ph.D., research associate in neurosurgery. Neural stem cells are immature cells that have the ability to give rise to all...

Light-sensitive photoswitches could restore sight to those with macular degeneration

...nd sticks in the channel pore and blocks it like a drain plug. When hit with UV light, the molecule kinks and pulls the plug, allowing ions to flow through the channel and activate the nerve cell. Green light unkinks it and replugs the channel, blocking ion flow. Isacoff said that this same photoswitch c...

Magnetic probe successfully tracks implanted cells in cancer patients

... to inject them directly into the lymph nodes that drain the area containing a tumor. Currently, doctors use ultrasound to guide the needle, and dendritic cells carrying a radioactive tag are sometimes used to try to double-check the cells' final resting place. However, in this study, the Dutch team disco...

Chernobyl: The true scale of the accident

...ower from Chernobyl. The costs have created a huge drain on the budgets of the three countries involved. What were the main consequences for the local economy? Agriculture was hardest hit, with 784,320 hectares taken from production. Timber production was halted in 694,200 hectares of forest. Remediation...

A little stress gives beneficial oomph! to immune system

...primarily the skin along with the lymph nodes that drain the skin. "Most immune challenges or wounds involve on the skin or other epithelial linings of the body," Dhabhar said. "If nothing happens immunologically following stress ?the skin isn't cut or wounded in some other way ?activated leukocytes usual...

Transgenic plants remove more selenium from polluted soil than wild plants, new tests show

...e 1980s when biologists discovered that irrigation drain water held at the Kesterson Reservoir in the San Joaquin Valley was causing serious deformities in birds. The researchers say cleaning up the sediment in the San Luis Drain could cost millions of dollars using conventional methods, including soil wa...

Study: Soap And Water Work Best In Ridding Hands Of Disease Viruses

...ng the viruses soapy hand washing flushes down the drain is the one that causes the common cold. Other removable viruses cause hepatitis A, acute gastroenteritis and a host of other illnesses. A separate key finding was that waterless handwipes only removed roughly 50 percent of bacteria from volunteer su...

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