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Tag: "coated" at biology news

In nature, proteins sweep up nanoparticles

...es were arranged like tree rings, and the proteins coated the particles’ surfaces and filled the gaps between them. “We found that the mineral aggregates, which are produced as a consequence of microbial activity, actually contain a lot of protein,” says Banfield. “This is very interesting because biomin...

Brain's white matter -- More 'talkative' than once thought

... the coating fire 20 to 90 times slower than cells coated with myelin. Myelin loss is well known to impair signaling and information processing, causing nerve cells to die and creating such neurodegenerative conditions as multiple sclerosis. Bergles speculates that this white matter activity his team dis...

Growing nerve cells in 3-D dramatically affects gene expression

...placed one batch of cells in standard petri dishes coated with collagen. They suspended the other batch in a thicker collagen gel. The bioengineers took great pains to be sure that this one-dimension difference was the only difference in the culture conditions. Team members even counted individuals cells as...

Cancer-killing invention also harvests stem cells

...faces more strongly than other cells, King's group coated a slender plastic tube with selectin. They then did a series of lab experiments, both in vitro and in vivo using rats, with this selectin-coated tube to filter the bloodstream for stem cells. It worked, and the King Lab discovered that they could a...

Scientists create dual-modality microbeads to improve identification of disease biomarkers

... beads are washed with ethanol. Then the beads are coated with a polymer that creates a hydrophilic surface on the beads. This allows the beads to be functionalized by adding antibodies or DNA molecules to the surface that will capture the target molecules. These beads are dual-function -- both optical a...

Gene hunters close in on Lou Gehrig’s disease

...es that resemble computer processor chips. They’re coated with tiny beads that “read?the SNPs scattered throughout the human genome. The researchers found 34 genetic variants that ALS patients were more likely to have compared to normal individuals without the disease. “This is the first major step to...

Manual dishwashing study digs up dirt on dish cleanliness

...r-temperature dishwashing tactics, the researchers coated dishes individually with cheese, eggs, jelly, lips...ated almost all of the bacteria on them, even when coated with dried-on cheese. But dishes washed in soapy room-temperature water, rinsed, and then weakly san...

Coated nanoparticles solve sticky drug-delivery problem

... sticky barrier. During experiments with these coated particles, the researchers also discovered that mu...nanoparticles behave like viruses, the researchers coated them with polyethylene glycol, PEG, a non-toxic material commonly used in pharmaceuticals. PEG diss...

Widely used iron nanoparticles exhibit toxic effects on neuronal cells

...maneuverable by remote magnetic fields, and can be coated with various marker molecules to make them stick selectively to tumors and other targets within the body. The particles can also be made to carry anti-cancer drugs or radioactive materials directly to a tumor. Magnetic nanoparticles designed to attac...

MIT device draws cells close -- but not too close -- together

...he device involves two separate comb-shaped pieces coated with living cells. These two pieces can click into place at two settings: One allows cells on the edges of the combs to touch, the other maintains a gap of 80 micrometers, or about four cell widths. The assembly is geared so that switching between th...

A key antibody, IgG, links cells' capture and disposal of germs

... conditions, the scientists found that latex beads coated with IgG formed phagolysosomes in just a third the time it took the cellular machinery to process uncoated beads, 15 minutes versus 45 minutes. "This process is central to the human immune response," Nohturfft says. "But some of the most destructi...

Ferns provide model for tiny motors powered by evaporation

...r making the material is simple enough. A wafer is coated with silicone and the hit with light, causing a pattern. The residual pattern is lifted off and that is used for the device. It resembles a curved spine with equally spaced ribs fanning outward from the spine. To make the device move, Borno said, th...

Like a snail through the intestinal canal

...ces that slide over each other. If a large surface coated with muco-adhesive remains still, and a relatively small surface coated with muco-adhesive begins moving in relation to the larger surface, the smaller surface has less fre...

Jumping gene could provide non-viral alternative for gene therapy

... hand, unlike retroviruses, transposons have to be coated with lipid to slip into cells. Although piggyBac is not as successful as the virus at integrating into DNA, "we could potentially make a hyperactive version of piggyBac, like they did for Sleeping Beauty, which might be as good or better than retr...

Blood-compatible nanoscale materials possible using heparin

... "These heparin composite membranes and fibers and coated carbon nanotubes are an enabling technology," says Saravanababu Murugesan, a recent doctoral graduate in chemical and biological engineering at Rensselaer and lead author of the paper. "Our results show these novel materials have great promise in the...

New study shows antibiotic may protect the heart

...of a blood vessel. In coronary angioplasty, stents coated with rapamycin are implanted to reduce the risk of...clinical question will be whether or not rapamycin coated stents can be utilized in patients to favorably affect damaged heart muscle beyond the blockage caus...

Snakes' virtual glasses, leopard spots and all-optical transistors

...of holes 0.2 millionths of a meter in diameter and coated in a layer of polymer. The researchers shine two beams of light on the structure: a signal beam and a control beam. When the beams strike the patterned film they produce plasmons, which are essentially blobs of electron gas near the surface of a meta...

New bird flu drug promises to beat the problem of resistance

... How it works The flu virus is like a football coated with two different types of enzymes. These are proteins which carry out specific jobs for the virus. The first of these proteins, haemagglutinin (H), helps the virus to invade cells in the throat whilst the second, neuraminidase (N), allows the new...

Protein-coated dental implants could improve bone regeneration

Titanium dental implants coated with proteins that induce bone formation may be a ..." The next step is clinical trials of an implant coated with the proteins, which Dr. Wikesjö hopes to start this summer. "There are still things we need ...

Sandia work launched on space shuttle shows live cells influence growth of nanostructures

...that discourages unwanted biofilm formation on the coated surface - important for avoiding infections that could be carried by implants and catheters. The cell's ability to sense and respond to its environment is what forms these unique nanostructures, says Brinker. During spin-coating, the cells react to...

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