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All-in-1 nanoparticle: A Swiss Army knife for nanomedicine

... to cook nearby cells. But combine a quantum dot and a gold nanoparticle, and the effects ... that uses proteins to surround a quantum dot core with a thin gold shell held at 3 nanometers ... do not interfere with one another. The quantum dot likely would be used for fluorescent imaging. The ...

Astronomy technology brings nanoparticle probes into sharper focus

... similar to their own isolating and analyzing one dot (in this case a star) in a crowded field of ... to color code genes and proteins, a blended color dot is a common challenge when analyzing images. For ... very near one another, said Wang. The fuzzy dot images were not precise enough on the nanometer ...

JILA solves problem of quantum dot 'blinking'

... time delay between excitation of a quantum dot and resulting photon emission from 21 nanoseconds ... nanometers wide coated with zinc sulfide. When a dot is excited by a brief laser pulse, one electron ... a single photonalways in a color that depends on dot size, greenish-yellow in this case. But every so ...

New tool for next-generation cancer treatments using nanodiamonds

... available. The group also used the same Nanofountain Probes to pattern dot arrays of drug-coated nanodiamonds directly on glass substrates. The production of these dot arrays, with dots that can be made smaller than 100 nanometers in ...

Scientists test device to track medication adherence in patients with HIV/AIDS

... could change that, allowing patients to participate in a type of virtual dot from home. The machine sits in your home and when its time for you to ... safety and efficacy of the medication. If we had a good way of doing dot thats realistic, instead of having someone come to your house or you going ...

NIH recognizes Clemson nanotechnology for molecule tracking

... and Ken Christensen will receive the $960,000 grant to develop polymer dot nanoparticles for tracking single molecules in live cells. The ... DNA or invading microbes. According to chemist Jason McNeill, the polymer dot particles are hundreds or thousands of times brighter than conventional ...

Researchers set new record for brightness of quantum dots

... the energy more efficiently and increases the brightness. A quantum dot is a tiny piece of semiconductor material 2 to 10 nanometers in diameter ... of a meter). When illuminated with invisible ultraviolet light, a quantum dot will fluoresce with visible light. To enhance the fluorescence, ...

Consumers more likely to identify healthy food using traffic light nutrition labels

... with red, amber or green dots to rate the food's salt, sugar, saturated fat and total fat content separately. A variation adds a single coloured dot to give an overall rating, rather than just rating separate nutrients. The percentage daily intake system and its variations present, for each of ...

Genetic study confirms the immune system's role in narcolepsy

... that nearly everyone with the disorder has unique variants of a gene called HLA-DQB1*0602. This is one of the genes that encodes HLA proteins, which dot the surface of the body's cells and help the immune system identify foreign proteins. Some researchers theorize that the HLA variants found in ...

Singapore scientists synthesize gold to shed light on cells' inner workings

... for applications in vivo. Our materials are smaller, less toxic and more biocompatible than the existing inorganic fluorescent quantum dot tags. The red fluorescence of the nanoclusters enhances biomedical images of the body greatly as there is reduced background fluorescence and better ...

Rice eyes risks of quantum dots

... dots containing cadmium and selenium showed decreased rates of growth but did not die. But in moderately acidic or alkaline conditions, quantum dot shells decomposed more rapidly, killing the bacteria in a matter of hours. On the positive side, the study also found certain proteins and such ...

American Chemical Society's Weekly PressPac -- Jan. 28, 2009

... may cause unintended harm that might be difficult to predict with short-term toxicity tests." - MTS ARTICLE #4 FOR IMMEDIATE RELEASE "Quantum dot Weathering Results in Microbial Toxicity" DOWNLOAD FULL TEXT ARTICLE http://pubs.acs.org/stoken/presspac/presspac/full/10.1021/es8023385 ...

AVS 55th International Symposium & Exhibition, Oct. 19-24

... QUILL AND SILICON NANOCRYSTAL INK This talk will present the properties and potential applications of silicon nanocrystal inks for making quantum dot solar cells and printed electronic chips. See: http://www.avssymposium.org/paper.asp?abstractID=82 . WHAT DOES IT MEAN TO BE SYNCHROTRON ...

8 National Medals of Science awardees to be honored at gala, then the White House

... growth factors, and sometimes even drugs-that they need to interpret and translate into a response. This task is handled by receptors that dot cell membranes. Lefkowitz has essentially defined the field of receptor biology through his work with G protein-coupled receptors, the largest and ...

Smithsonian scientists discover new bird species

... and breast, yellow belly, olive back and black feathers on the head. Females are similar, but less vibrant. Both sexes have a distinctive white dot on their face in front of each eye. The bird was first observed by Smithsonian scientists in 2001 during a field expedition of the National Zoo's ...

The emerging scientific discipline of aeroecology

... air pollution, skyscrapers, aircraft, radio and television towers, plus a recent proliferation of communication towers and wind turbines that dot the Earth's landscape. In addition, human-altered landscapes increasing are characterized by deforestation, intensive agriculture, urbanization, ...

Fishing ban guards coral reefs against predatory starfish outbreaks

... Not only do they look menacing, but those spines are also extremely sharp and carry a painful toxin. When outbreaks occur, thousands of starfish dot the reef surface, interspersed by the pure white skeletons of recently consumed coral colonies. Sweatman said that even much lower densities of ...

Study shows quantum dots can penetrate skin through minor abrasions

... Researchers at North Carolina State University have found that quantum dot nanoparticles can penetrate the skin if there is an abrasion, providing insight into potential workplace concerns for healthcare workers or ...

Adult brain can change, study confirms

... that the distortions resulted from cortical reorganization in the deprived cortex. To isolate that distortion, they had BL fixate on a center dot while objects, such as squares, appeared in various parts of the visual field. As expected, BL saw nothing when a square appeared in his blind area. ...

The right drug at the right time

... of replacing the pricey solvents used in quantum dot synthesis with cheaper oils that are commonplace ... than a year ago on the scale-up issues of quantum dot manufacture, but the solvents turned out to be so ... ODE - the least expensive solvent used in quantum dot preparation today - account for about 90 percent ...

Method slashes quantum dot costs by 80 percent

... of replacing the pricey solvents used in quantum dot synthesis with cheaper oils that are commonplace ... than a year ago on the scale-up issues of quantum dot manufacture, but the solvents turned out to be so ... ODE - the least expensive solvent used in quantum dot preparation today - account for about 90 percent ...

Quantum dots provide a faster, more sensitive method for detecting respiratory viral infections

... researchers report that not only can a quantum dot system detect the presence of particles of the ... next step will be to develop a quantum dot cocktail capable of simultaneously detecting the ... of 10 minutes. By comparison, the new quantum dot method takes one to two hours and is even more ...

Math model predicts cancer behavior

... Vito Quaranta clicks on a small black dot on his computer screen. The dot ?which represents about a thousand cancer cells ?begins to "grow," ...

Quantum dots reviewed -- Could these nanoparticles hold the cure to cancer?

... and treatment, the review includes a detailed examination of Quantum dot advantages, their synthesis, properties and applications, toxic effects, use in imaging and analysis plus Quantum dot drug delivery systems. The paper also outlines some early success in the ...

Pathway toward gene silencing described in plants

... for ribosomes. "She got a brilliant signal in the nucleolus, a brilliant dot in the same place for each of the proteins," said Pikaard. Using RNA-FISH, Pontes also found that the siRNAs were in that same dot within the nucleolus. Pontes and Pikaard were able to deduce the order ...

New nanosensor uses quantum dots to detect DNA

... Finally, when the researchers shined a laser on the mix, the quantum dot passed the energy on to the Cy5 molecule that was attached to the second ... together, and the distinctive glow would not have appeared. Each quantum dot can connect to up to about 60 DNA sequences, making the combined glow even ...

'Smart' nanoprobes light up disease

... "quenching" that involves tethering a gold nanoparticle to the quantum dot to inhibit luminescence. The tether, a peptide sequence measuring only a ... billionths of a meter, holds the gold close enough to prevent the quantum dot from giving off its light. In their test system, the Rice team used a ...

Out of sight, out of mind? Not necessarily

... blindness, either a horizontal or a vertical line or a red or a green dot flashed on the screen. Researchers then asked the study participants ... of the time. When the participants had to guess whether a red or a green dot had flashed on the screen, they gave the correct answer with 81 percent ...

Nano-Probes Allow an Inside Look at Cell Nuclei

... This technology has been licensed to the Hayward, California-based Quantum dot Corporation for use in biological assays. More recently, Chen and ... Gerion used an especially compact cadmium selenide/zinc sulfide quantum dot coated with silica. Next, they stole a trick from a virus's playbook to ...

Study may help slay 'Yellow Monster'

... uranium in weapons continue today. Closer to home, questions continue to be asked about environmental exposure to uranium from mine tailings that dot the landscape across the Navajo Nation. "When the uranium mining boom crashed in the '80s, it really crashed and there wasn't much cleanup," ...

New technique helps identify multiple DNA regulatory sites

... complex nano-scale patterns. One such pattern is found on a DNA microarray, a silicon or glass chip printed with up to 500,000 tiny dots. Each dot comprises multiple DNA molecules of known sequence, i.e. a piece of an individual's genetic code. Scientists use DNA microarrays to discover and ...

New technique may speed DNA analysis

... complex nano-scale patterns. One such pattern is found on a DNA microarray, a silicon or glass chip printed with up to 500,000 tiny dots. Each dot comprises multiple DNA molecules of known sequence, i.e. a piece of an individual's genetic code. Scientists use DNA microarrays to discover and ...

Tagging pathogens with synthetic DNA 'barcodes'

... One is in a flow cytometer, in which samples move rapidly past a window where a computer reads the color codes of individual beads. Another is by dot blotting, in which the sample is spread on a sheet of absorbent paper and made visible to the naked eye. Or the color can be observed directly ...

Young Blood Revives Aging Muscles, Stanford Researchers Find

... capacity to repair themselves but fail to do so. Rando and his group studied specialized cells called satellite cells, the muscle stem cells, that dot muscle tissue. These normally lie dormant but come to the rescue in response to damaged muscle-at least they do in young mice and humans. In older ...

Nanoparticles offer new hope for detection and treatment

... will be tested in clinical trials in about one and a half to two years. The spherical nanoparticles are a few thousand times smaller than the dot above this "i," yet each can carry about 100,000 molecules of the metal used to provide contrast in MRI images. This creates a high density of ...

Quantum Dots Research Leads to New Knowledge about Protein Binding in Plants

... and Environmental Engineering, Mechanical Engineering and Botany and Plant Sciences have worked together to discover a way to utilize Quantum dot bio-conjugates to uncover new knowledge about the binding of a protein at the growing pollen tube tip. This protein plays a critical role along with ...
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