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Tag: "thin" at biology news

Study casts doubt on 'Snowball Earth' theory

...all Earth" that would have included large areas of thin ice or open ocean, particularly around the equator...er of ice. "If there was ice, it had to have been thin enough that organisms could photosynthesize below it or within it," Olcott said. Frank Corsetti of ...

Beetle-inspired switch uses water for bonding

..., in the water through the minute capillaries of a thin disk of porous glass embedded in the plate. The water moves and wells up into a micrometer-sized droplet on the plate surface. The exposed droplet can then stick to another surface. To break the bond, electricity pulls the exposed water back through ...

Discovering an ecosystem beneath a collapsed Antarctic ice shelf

...ed a thriving clam community, mud volcanoes, and a thin layer of bacterial mats. The discovery could provide evidence for researchers to better understand the dynamics within the inhospitable sub-ice setting, which covers more than 1.5 million square kilometers [nearly 580,000 square miles] of seafloor, ...

Otter adaptations: How do otters remain sleek and warm

...e of the underhairs, these hairs are coated with a thin layer of body oil from the otter's sebaceous glands, thus providing another barrier to water. The fins of the underhairs are also aligned away from the body, which is consistent with the direction in which otters run their paws through their hair dur...

Genome Sequence for Haemophilus Influenzae Completed

...e of the underhairs, these hairs are coated with a thin layer of body oil from the otter's sebaceous glands, thus providing another barrier to water. The fins of the underhairs are also aligned away from the body, which is consistent with the direction in which otters run their paws through their hair dur...

'Underground' tunnels discovered as means for communication between immune system cells

... cells unfurl hidden veils - membranes that are so thin they can barely be imaged - and use these veils to...d, one to two minutes before the appearance of the thin membranes, there were bursts of color indicative of calcium flux. Given their earlier results, the r...

Virginia Tech, Nanjing Institute researchers discover half-billion year-old fossils

...ved three-dimensionally in the rock." Using serial thin sectioning techniques, Shen and Xiao cut the decimeter-sized fossils into many paper-thin slices and looked at them under a microscope. They saw organic remains of millimeter-sized tubes that were the building blocks of the Ediacara fossils from Chin...

Disappearing arctic lakes linked to climate change

...pect areas of continuous permafrost to continue to thin and move steadily northward, resulting in the disa...rance of more lakes," said Smith. In regions with thin or discontinuous permafrost, surface soils also become drier as the permafrost degrades. "The chang...

Vaginal gel may provide a new approach to HIV prevention

...Provera) to synchronize their menstrual cycles and thin the vaginal membrane, which increases susceptibility to virus infection, Veazey says. During testing, researchers placed the experimental gels in the animals' vaginas. Thirty minutes later, the animals were exposed to high-dose SHIV. The three inhib...

Nanoparticles, nanoshells, nanotubes: How tiny specks may provide powerful tools against cancer

...ic balls consisting of a silica core coated with a thin layer of gold and, secondly, near infrared light (NIR). Used alone, nanoshells are non-toxic and can be excreted with no ill effect because gold is biologically compatible. Near-infrared light delivered by a laser has minimal interaction with compone...

Scientists observe how a close bond activates the immune system

... molecules (molecules that the cell can grip) in a thin fluid coating on a glass surface. In prior studies the antigen was free to move over the entire glass surface, but in this study they set up miniscule chrome barriers, allowing them to modify the pattern of T-cell antigen receptor clusters in the im...

Bare metal stents deliver gene therapy to heart vessels with less inflammation in animal studies

...nique, using a compound that binds in an extremely thin layer to bare metal surfaces, may have potential uses in other areas of medicine that make use of metallic implants. Cardiologists frequently treat heart disease patients now by using stents to expand partially blocked blood vessels and improve bloo...

What can change in the brain? Electrical synapses, research shows

...iments came from the thalamic reticular nucleus, a thin sheet of neurons that is part of the thalamus. The thalamus is a small region in the center of the brain responsible for relaying sensory information to the cerebral cortex, where it is transformed into memories and emotions, speech and movement. Th...

New, unique microscope for nanotech

...fluorescent dyes. Instead of cutting a sample into thin slices, a researcher can focus through the entire sample and resolve it in three dimensions. The atomic force microscope uses an extremely fine tip to run over the surface of a sample and "see" extremely fine detail down to an atomic scale. "It all...

Plants, too, have ways to manage freeloaders

... out. In addition, native Californians used strong thin lupine roots to make snares and fishing nets. In a preliminary study, she, Taylor and Povich used molecular markers to identify the different strains of the bacteria Bradyrhizobia that interact with roots of the six species of lupine found on the re...

Antibacterial coatings cut infection rates

...searchers at The Wark TM are developing nanometre thin coatings for biomedical implants and biomedical devices that prevent bacterial colonisation of implants that result in septic inflammation problems. "We are using molecules called furanones, which are derived from natural chemicals originally extrac...

3D ultrasound device poised to advance minimally invasive surgery

...eering at the Pratt School. Optical endoscopes are thin tubes with a tiny video camera that surgeons can insert directly into the abdomen or chest through small incisions. "With our scanner, doctors could see the target lesion or a portion of an organ in a real-time three-dimensional scan," Smith said. "...

Rare Tibetan antelope listed as endangered

...eering at the Pratt School. Optical endoscopes are thin tubes with a tiny video camera that surgeons can insert directly into the abdomen or chest through small incisions. "With our scanner, doctors could see the target lesion or a portion of an organ in a real-time three-dimensional scan," Smith said. "...

Frog’s ear canal may provide insights for understanding human hearing loss

...ct ultrasounds -- namely, the eardrum must be very thin to vibrate effectively at these high frequencies, ...nce of an ear canal not only protects A. tormotus' thin and fragile eardrum from the environment, but also lessens the distance between the eardrum and the ...

Pitt professor's theory of evolution gets boost from cell research

...on and change suddenly, seemingly appearing out of thin air. Those changes may be significant and beneficial (like teeth or limbs) or, more likely, kill the organism. Why does it take an environmental drama to cause mutations? Why don't cells subtly and constantly change in small ways over time, as Darwi...

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