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Bubble in Biological News

'Seeing' stem cells helps in fight against peripheral arterial disease

... Tested in a rabbit model for the first time, the bubble prevents the body's immune system from reaching ... could not determine if the stem cells within the bubble remained alive. Researchers then induced the stem cells within the bubble to produce luciferase, a bioluminescence imaging ...

Acoustical Meeting, Nov. 10-14, 2008 in Miami, Florida

... Columbia University are trying to determine the bubble behavior, i.e., bubble oscillation and/or collapse, during focused ... size and stability of the microbubble used. Both bubble oscillation and collapse can result at the ...

Life in a bubble

... have adapted to life underwater by using this bubble as an external lung," said John Bush, associate ... a delicate balance between the stability of the bubble and the respiratory needs of the insect. The ... mechanical stability and the more pressure the bubble can withstand before collapsing. However, ...

MIT: Stripes key to nanoparticle drug delivery

... or "eats" it, encasing the object in a smaller bubble inside the cell that can eventually be excreted. ... "If you have a soap film and you poke it with a bubble wand, you'll pop it," he said. "But if you coat the bubble wand with soap before poking the film, it will ...

New insights into how lasers cut flesh

... plasma bubbles. All it takes to seed such a bubble is a few free electrons. These electrons pick up ... beam and start a cascade process that produces a bubble that grows until it contains millions of ... electrons. Subsequent collapse of this plasma bubble causes a micro-explosion. In pure water, it is ...

Old growth giants limited by water-pulling ability

... flows through the porous edges of the membrane, but if there's an air bubble in one tracheid, the membrane moves to the side and blocks off the pit so ... surfaces, the water is in "tension," like a pulled rubber band. If an air bubble gets in, it's like the rubber band breaking and water can no longer be ...

Salt block unexpectedly stretches in Sandia experiments

... microscope's nanometer-sized tip as it left the surface of the salt. More intense examination showed that surface salt molecules formed a kind of bubble a ductile meniscus with the exploratory tip as it withdrew from penetrating the cube. In this, it resembled the behavior of the surface of water ...

UAF researchers to present at AGU press briefing

... "The concentrations of the methane were the highest ever measured in the summertime in the Arctic Ocean," Semiletov said. "We have found methane bubble clouds above the gas-charged sediment and above the chimneys going through the sediment." The new data indicates the underwater permafrost is ...

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

... head." To test the effects of a flowing fluid on flexible objects, Ristroph created a thin film of soapy water -- the beginning of a giant soap bubble -- stretched between two fishing lines and constantly refreshed with a flow of water from the top. Into the membrane, he inserted pieces of thin ...

Sun to set on Ulysses solar mission on July 1

... including two polar passes of the giant planet Jupiter. "The main objective of Ulysses was to study, from every angle, the heliosphere, the vast bubble in space carved out by the solar wind," said Ed Smith, NASA's Ulysses Project Scientist. "The heliosphere separates the solar neighbourhood from the ...

New clues to how proteins dissolve and crystallize

... ions according to the magnitude of their effects. The resulting "Hofmeister series" governs the strengths of ions in inducing protein unfolding, bubble coalescence, and many other phenomena, and remains vital to protein chemistry and other biological and chemical studies to this day. But its ...

USF professor gives historical look at physiology and WWII air war

... can be reduced by breathing pure oxygen before takeoff and during ascent. This reduces the amount of nitrogen in the blood and tissues and so reduces bubble formation. This technique is still used today, including by astronauts prior to a space walk. Fliers could survive rapid decompression of a ...

Quakes under Pacific floor reveal unexpected circulatory system

... of buried 200-meter-wide chimney atop the ridge, run below the ridge along its axis through a tunnel-like zone just above a magma chamber, and then bubble back up through a series of vents further along the ridge. If you google on images of hydrothermal vents, you come up with cartoons that dont at all ...

Planting carbon deep in the earth -- rather than the greenhouse

... with the water and minerals there in order to be stabilized. That way it spreads into its local environment rather than remaining as a giant gas bubble which might ultimately seep to the surface. It had been thought that reaction might take place over hundreds or thousands of years, but theres a ...

A mechanism to explain biological 'cross-talk' between 24-hour body cycle and metabolism

... the activity of Rev-erb is controlled by heme. Heme represents the body's most important way of transporting and using oxygen, which would simply bubble away in the body without being bound to heme. In a molecular baton hand-off, oxygen is transferred from heme in the bloodstream to the heme molecules ...

Gold nanorods shed light on new approach to fighting cancer

... longer. Shining light on the gold nanorods causes them to become extremely hot, ionizing the molecules around them. "This generates a plasma bubble that lasts for about a microsecond, in a process known as cavitation," Wei said. "Every cavitation event is like a tiny bomb. Then suddenly, you have ...

ETH Zurich professor Ari Helenius awarded Benoist Prize

... the cytosol and eventually the nucleus. Working from this finding, Helenius discovered the so-called endosome, a structured, intracellular membrane bubble that provides the acidic environment that allows the fusion of virus and cell. Increased insight into cellular quality control Virologists are ...

Bubbles go high-tech to fight tumors

... pops, the perfluorocarbon expands into a gas bubble that is approximately 125 times larger in volume than the droplet. "If a bubble remained spherical its diameter would be much ... said. "So it deforms into a long sausage-shaped bubble that lodges in the vessel like a cork. Two or ...

Discovering the first steps in transcription-coupled repair

... of just the size typical of transcription -- that is, the size of the bubble opened by RNAPII. Identification of this bubble, which does not progress ... Indeed, the researchers found that RNAPII bound to a transcription bubble prevented incision by XPG. To their surprise, however, adding another ...

After the yeast is gone bacteria continue to develop flavor of sparkling wine

... distinctive impact upon sparkling wine quality in terms of aroma, flavor, bubble size and bubble persistence, especially for premium quality wines," says Núria Rius, a ...

Siberian lakes burp 'time-bomb' greenhouse gas

... North Siberia. As they walked across the frozen lakes they mapped locations and types of discrete methane bubbling trapped in the ice. By placing bubble traps over these spots and under the water the researchers could get daily measurements of the volume of methane released by the bubbles. Walter ...

Contrary to common wisdom, scientist discovers some mammals can smell objects under water

... bubbles come into contact with an object, it is almost inevitable that odorant molecules will mix with the air and be drawn into the nose when the bubble is inhaled." Just because the moles are getting whiffs of interesting odors underwater doesn't necessarily mean they smell them. So Catania ...

South Pacific plant may be missing link in evolution of flowering plants

... monitored before any activity starts and marine work should cease if a dolphin enters the work area. Other innovative ideas include creating an air bubble curtain and creating a ramped warning signal to give dolphins time to leave the area before work commences. Dr David also calls for further ...

Dolphins at risk

... monitored before any activity starts and marine work should cease if a dolphin enters the work area. Other innovative ideas include creating an air bubble curtain and creating a ramped warning signal to give dolphins time to leave the area before work commences. Dr David also calls for further ...

Scientists design potent anthrax toxin inhibitor

... Ph.D., of Rensselaer Polytechnic Institute, in Troy, NY, and Jeremy Mogridge, Ph.D., of the University of Toronto, the investigators built a fatty bubble studded with small proteins that can cling tightly to the cell membrane receptor-binding protein used by anthrax toxin to gain entry into a host ....

Asleep in the deep: Model helps assess ocean-injection strategy for combating greenhouse effect

... vent to the atmosphere, defeating the purpose of the whole grand scheme. Even worse, if the liquid-to-gas conversion happens suddenly, the gas can bubble up in a plume and erupt---a potential hazard. Small-scale ocean experiments have been done to investigate how the carbon dioxide (CO2) actually ...

High fidelity keeps human DNA assembly line humming

... a tried and true design and our study explains why this is an enduring design." The paper, "Dynamic Error Correction and Regulation of Downstream bubble Opening by Human RNA Polymerase II," also is authored by research associates Xue Gong and Chunfen Zhang in Burton's lab and Michael Feig, MSU ...

Molecular thermometers on skin cells detect heat and camphor

... The human brain is like a general in a bunker. Floating in its bubble of cerebrospinal fluid, it has no direct window to the outside world, so the only way for the brain to observe, comprehend, and order the body into ...

Ophthalmologists implant five patients with artificial silicon retina microchip

... insert air into the middle of the eye to gently push the retina back down over the device, and close the incisions. Over a period of 1 week the air bubble is resorbed and replaced by fluids created within the eye. According to Chow, "The use of the subretinal space to hold a device that artificially ...

Ophthalmologists Use Artificial Silicon Retina Microchip To Treat Vision Loss

... insert air into the middle of the eye to gently push the retina back down over the device, and close the incisions. Over a period of 1 week the air bubble is resorbed and replaced by fluids created within the eye. According to Chow, "The use of the subretinal space to hold a device that artificially ...
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