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Tag: "dots" at biology news

Brightening prospects of using fluorescent nanotubes in medical applications

...systems – begin fading within a few hours. Quantum dots last several days before degrading. Hertel’s team is currently working on the next step necessary for many biomedical uses: finding a way to attach molecules to the surface of the nanotubes that will allow them to bind to specific biological targe...

Brain maps online

...better than half a micrometer per pixel, or 55,000 dots per inch, with virtual slides approaching 30 gigabytes in size each. ...

Leeches ferry infection among newts

...ions in the newts appear as clusters of small dark dots under the skin, which can later develop into a large area of swollen muscle. The swollen muscle contains many spores (also called spherules), each of which contains hundreds of infectious cells called endospores. Raffel and his colleagues think that ...

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

... technology involves embedding fluorescent quantum dots and magnetic iron oxide nanoparticles inside the b...ptical beads. Nie and Sathe synthesize the quantum dots in different colors by varying their size, giving the beads a unique optical signature. Having diffe...

Studies yield insight into the numerical brain

...ers, either when they are presented as patterns of dots or as Arabic numerals. In their experiments, the... attention to the quantities conveyed by groups of dots or numeric digits presented to them. During the process, the subjects' brains were scanned using fun...

Ring-around-the-cell

.... When the osteoclast is on the move, these little dots amble randomly around the cell, but when the cells prepare to dissolve the bone, they make a beeline for the edge. Scientists had been unsure how podosomes were involved in ring formation or, if they did form the ring, whether they somehow fused toge...

Taking 'chips' to the next level of gene hunting

...lides that have arrayed on them neat grids of tiny dots containing small sequences of only hand-selected n...ces. Because each chip can hold thousands of these dots - even a whole genome's worth of information - scientists in the future may be able to rapidly and e...

Embryonic patterning makes the feathers fly

...t watching the formative process of stripes versus dots play out was fascinating. From those feathery patterns, a team of theoretical biologists was able to develop a mathematical model that simulated the process of periodic pattern formation. This kind of basic work can throw light on health problems lik...

Mass vaccination unnecessary in the event of a large bioterrorist US smallpox attack

...smallpox requires much more than simply connecting dots on a map. Instead Longini and colleagues rely on a tool called stochastic modeling to take into account real-world unpredictability, as well as many factors about the disease and the affected population. In constructing these models, Longini and coll...

Connect the Quantum Dots

...minescent Quantum Dots", demonstrates that quantum dots can one day replace conventional organic dyes in b...hich have limited luminescent properties. Quantum dots have superior photophysical properties and will presumably replace conventional organic dyes in biom...

UF scientists restore sight to chickens with blinding disease

.... So I did this simple little test, drawing little dots on a piece of paper. The chick, which was standing on the table, came over to the paper and started pecking at all of them. It was so exciting." Later, more precise tests showed that of the seven treated chickens, five displayed near-normal visual b...

UC Riverside psychologist explores human perception, finds 'wow factor'

...t just from lips, but from the simple movements of dots placed on lips, teeth and tongue. They can also recognize people's voices just from seeing their faces, and vice versa, and seem to be able to distinguish among a variety of rooms on campus just from their echoes. "We get people ready for a test an...

Animal brains 'hard-wired' to recognize predator's foot movements, Queen's study suggests

...t moves, these seemingly unstructured white marker dots become organized into meaningful images, from whic...ent when these cues were changed. Scrambling the dots didn't create a problem, but when the image was inverted, observers were unable to say if the animal...

Scientists seek to unwrap the sweet mystery of the sugar coat on bacteria

...ectin microarrays--small glass plates covered with dots of sugar-binding proteins called lectins. The lectin dots act like microbe Velcro. Bacteria with a surface sugar that matches a specific lectin stick to that ...

Researchers solve mystery of how nuclear pores duplicate before cell division

...lit to give rise to two daughter pores, two bright dots would have emerged from one; however, the researchers tracked movement of only one dot, confirming their previous finding that pores formed from scratch. Additional research demonstrated that nuclear pore assemblies are added in a stepwise, coordina...

'Virus chip' detects new virus in prostate tumors

...d visualized with a scanning laser microscope. The dots that have found a match glow with fluorescent light. ...

Cellular scale drug delivery from the inside out

... semiconductor nanocrystals ?also known as quantum dots ?and are held in place by chemical bonds. Once the nanospheres are inside the target cells, a trigger is used to pop the caps off and release the drug. "We're looking at two levels of control," Lin said of the trigger mechanism. "One level is to hav...

New nanosensor uses quantum dots to detect DNA

...We are the first to demonstrate the use of quantum dots as a DNA sensor," Wang said. Quantum dots are crystals of semiconductor material, whose sizes are only in the range of a few nanometers across...

New antifreeze protein found in fleas may allow longer storage of transplant organs

... was serendipity," she says now. "They looked like dots of pepper sprinkled on the snow. Later we were able to collect large numbers for testing at the Queen's University Biological Station." Using a process called ice affinity purification, the team isolated the new protein, which is rich in an amino a...

'Smart' nanoprobes light up disease

...ave used targeted nanostructures including quantum dots for molecular imaging, but they have never been ab...lem by using emissive nanoparticles called quantum dots that give off light in the near-infrared (NIR), a rare portion of the spectrum that has no backgroun...

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