Researchers identify pressure effects on nanomaterials: related news

Researchers identify pressure effects on nanomaterials

Transistors, lasers and solar-energy conversion devices may be easier to manipulate because of recent research by Lawrence Livermore National Laboratory scientists. The researchers defined the role high pressure plays in precisely tuning the fundamental properties of nanomaterials and, in particular, nanoparticle assemblies that are important for device applications.

Researchers identify pressure effects on nanomaterials

(Nanowerk News) Transistors, lasers and solar-energy conversion devices may be easier to manipulate because of recent research by Lawrence Livermore National Laboratory scientists.

Researchers identify pressure effects on nanomaterials

Transistors, lasers and solar-energy conversion devices may be easier to manipulate because of recent research by Lawrence Livermore National Laboratory scientists.

Researchers identify pressure effects on nanomaterials

Fluorescence from CdSe quantum dot solids in environments varying from stable to high unstable show that small deviations from uniform stress distribution greatly affect the electronic properties. The blue represents cadmium, the yellow represents selenium and the red represents a cloud of electrons in their excited state. Image by Sebastien Hamel/LLNL

Testing the Toxicity of Nanomaterials

Nano screen: Like all nanomaterials, iron-based nanoparticles (above) like these can vary in their toxicity, depending on their chemical composition, coating, size, and shape. To better assess the biological effects of nanomaterials, researchers have developed a rapid screening tool that can evaluate large numbers of nanomaterials and identify groups of materials that are more likely to pose a risk.

Researchers Tout New Network Worm Weapon

coondoggie writes "Can Internet worms be thwarted within minutes of their infection? Researchers at Ohio State University say they can and they have the method to prove it. The key, researchers found, is for software to monitor the number of scans that machines on a network send out. When a machine starts sending out too many scans — a sign that it has been infected — administrators should take it off line and check it for viruses. In a nutshell, the researchers developed National Science Foundation funded a model that calculated the probability that a virus would spread, depending on the maximum number of scans allowed before a machine was taken off line.'The difficulty was figuring out how many scans were too many' researchers said."

Electronic Handheld Blood Pressure Devices Market Reaching up to $793 Million by 2010

Electronic handheld blood pressure devices are automated blood pressure measuring devices used for measuring blood pressure at regular intervals, without causing inconvenience to the individual's daily routine. Rising healthcare expenditure and rapidly aging population are key factors contributing towards a rise in demand for such devices, particularly in the developed regions of the world. With growing environmental concerns related to the use of mercury-based traditional sphygmomanometers, developed nations have stepped up efforts to replace mercury devices with electronic blood pressure devices.

Research measures movement of nanomaterials in simple model food chain

New research in Nature Nanotechnology shows that while engineered nanomaterials can be transferred up the lowest levels of the food chain from single celled organisms to higher multicelled ones, the amount transferred was relatively low and there was no evidence of the nanomaterials concentrating in the higher level organisms. The preliminary results observed by researchers from the National Institute of Standards and Technology suggest that the particular nanomaterials studied may not accumulate in invertebrate food chains.

Research measures movement of nanomaterials in simple model food chain

(Nanowerk News) New research* shows that while engineered nanomaterials can be transferred up the lowest levels of the food chain from single celled organisms to higher multicelled ones, the amount transferred was relatively low and there was no evidence of the nanomaterials concentrating in the higher level organisms. The preliminary results observed by researchers from the National Institute of Standards and Technology (NIST) suggest that the particular nanomaterials studied may not accumulate in invertebrate food chains.

Researchers Measure Movement of Nanomaterials in Simple Food Chain

A new study from the National Institute of Standards and Technology shows that while engineered nanomaterials can transfer up the lowest levels of the food chain from single celled organisms to higher multicelled ones, the amount transferred is relatively low and there is no evidence of the nanomaterials concentrating in the higher level organisms.

Researchers produce 3-D nanotube circuits

A team of researchers at the National Institute of Advanced Industrial Science and Technology in Tsukuba, Ibaraki Prefecture, has succeeded in producing hyperfine 3-D circuits using carbon nanotubes, it was learned Sunday. The team led by Kenji Hata released their findings in the on-line version of the May 4 issue of Nature Nanotechnology. The discovery is expected to help reduce the size of integrated circuits and allow the development of highly sophisticated sensors, the researchers said. The researchers synthesized nanotubes by blowing carbon gas that had been heated to about 800 C over a silicon board.

Researchers to examine video games and health

The Robert Wood Johnson Foundation has announced it will give a dozen research teams up to $200,000 each for projects that will measure the effects of playing video games on the young and old. For example, researchers at Cornell University will study how a mobile phone game rewarding healthy eating and exercise will influence children's behavior, and researchers at the University of Florida will monitor how playing Playstation 2's "Crazy Taxi" affects perception in the elderly.

First Use Of DNA Fingerprinting To Identify Viable Embryos

Fertility researchers have used DNA fingerprinting for the first time to identify which embryos have implanted after in vitro fertilisation (IVF) and developed successfully to result in the births of healthy babies. The technique, combined with sampling cells from blastocysts (the very early embryo) before implantation in the womb, opens the way to pin-pointing a handful of genes that could be used to identify those blastocysts most likely to result in a successful pregnancy.

First use of DNA fingerprinting to identify viable embryos

Fertility researchers have used DNA fingerprinting for the first time to identify which embryos have implanted after in vitro fertilisation (IVF) and developed successfully to result in the births of healthy babies. The technique, combined with sampling cells from blastocysts (the very early embryo) before implantation in the womb, opens the way to pin-pointing a handful of genes that could be used to identify those blastocysts most likely to result in a successful pregnancy.

New Methods for Measuring Biological Activity of Nanomaterials

As researchers develop an ever-expanding toolkit of nanoparticles for use as drug and imaging agent delivery vehicles, there is a growing need to understand how a given nanoparticle's physical and chemical properties affect biological activity and toxicity. Now, two researchers working independently of one another have develop new methods for measuring the biological activity of nanomaterials in a highly systematic manner that enable them to draw important insights about nanomaterial biologic activity.

OECD launches sponsorship program for safety testing of nanomaterials

(Nanowerk News) OECD’s Working Party on Manufactured Nanomaterials has launched a “sponsorship program” in which countries will share the testing of specific nanomaterials at its 3rd meeting in November 2008. Much valuable information on the safety of nanomaterials can be derived by testing a representative set for human health and environmental safety.

Trade Unions call for REACH amendment to cover nanomaterials

European labour unions have called on the European Commission to amend the REACH regulation on chemicals to better protect workers against nanomaterials throughout their lifecycle. Their call comes shortly after the EU executive argued that nanotech is already covered by existing EU regulation. "Workers all along the production chain from laboratories through to manufacturing, transport, shop shelves, cleaning, maintenance and waste management" are exposed to nanomaterials manufactured and placed on the market without true knowledge of their potential impacts on human health and the environment, states a resolutionPdf external adopted by the European Trade Union Confederation (ETUC) on 25 June. The confederation calls on the Commission to amend the bloc's chemicals legislation (REACH) to cover nanomaterials manufactured or imported below

Double Duty: Loss Of Protective Heart Failure Protein Causes High Blood Pressure

Scientists at the Center for Translational Medicine at Thomas Jefferson University in Philadelphia have found that a protein that appears to have protective and perhaps healing effects for failing hearts also plays a similar role in high blood pressure. They found lower-than-normal levels of the protein S100A1 in cells that line blood vessel walls in animals with high blood pressure.

U.S. researchers identify new DNA weapon against avian flu

By delivering vaccine via DNA constructed to build antigens against flu, along with a minute electric pulse, U.S. researchers have immunized experimental animals against various strains of the virus.

U.S. researchers identify new DNA weapon against avian flu

WASHINGTON, July 1 (Xinhua) -- By delivering vaccine via DNA constructed to build antigens against flu, along with a minute electric pulse, U.S. researchers have immunized experimental animals against various strains of the virus.

U.S. researchers identify new DNA weapon against avian flu

WASHINGTON, July 1 (Xinhua) -- By delivering vaccine via DNA constructed to build antigens against flu, along with a minute electric pulse, U.S. researchers have immunized experimental animals against various strains of the virus.

Researchers Peer Into Water In Carbon Nanotubes

Researchers have identified a signature for water inside single-walled carbon nanotubes, helping them understand how water is structured and how it moves within these tiny channels. This is the first time researchers were able to get a snapshot of the water inside the carbon nanotubes.

Researchers Find Gene Determinants Of C-Reactive Protein

Researchers at Brigham and Women's Hospital (BWH) have found that variation in several genes that are associated with metabolic and inflammatory regulation – in diseases such as diabetes and heart disease – also have significant effects on C-reactive protein (CRP) levels.

Researchers Cut Quantum Cryptography Costs

Researchers at the National Institute of Standards and Technology (NIST) have come up with a simpler and potentially lower-cost method for quantum cryptography distribution. The “quantum key distribution� (QKD) method minimizes the required number of detectors, which the researchers said are the most costly components in quantum cryptography.

Qld researchers discover melanoma gene

Researchers in Queensland say they have discovered a way to identify the people who are most at risk of developing melanoma, a deadly skin cancer.

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